Sato Y

References (38)

Title : Goiter in a 6-year-old patient with novel thyroglobulin gene variant (Gly145Glu) causing intracellular thyroglobulin transport disorder: Correlation between goiter size and the free T3 to free T4 ratio - Matsuyama_2022_Clin.Pediatr.Endocrinol_31_185
Author(s) : Matsuyama M , Sawada H , Inoue S , Hishinuma A , Sekiya R , Sato Y , Moritake H
Ref : Clin Pediatr Endocrinol , 31 :185 , 2022
Abstract : Thyroglobulin gene abnormalities cause thyroid dyshormonogenesis. A 6-yr-old boy of consanguineous parents presented with a large goiter and mild hypothyroidism (thyroid-stimulating hormone [TSH] 7.2 microIU/mL, free T3 [FT3] 3.4 pg/mL, free T4 [FT4] 0.6 ng/dL). Despite levothyroxine (LT4) administration and normal TSH levels, the goiter progressed slowly and increased rapidly in size at the onset of puberty. Thyroid scintigraphy revealed a remarkably high (123)I uptake of 75.2%, with a serum thyroglobulin level of 13 ng/ml, which was disproportionately low for the goiter size. DNA sequencing revealed a novel homozygous missense variant, c.434G>A [p.Gly145Glu], in the thyroglobulin gene. Goiter growth was suppressed by increasing the LT4 dose. Thyroidectomy was performed at 17-yr-of-age. Thyroglobulin analysis of the thyroid tissue detected mutant thyroglobulin present in the endoplasmic reticulum, demonstrating that thyroglobulin transport from the endoplasmic reticulum to the Golgi apparatus was impaired by the Gly145Glu variant. During the clinical course, an elevated FT3/FT4 ratio was observed along with thyroid enlargement. A high FT3/FT4 ratio and goiter seemed to be compensatory responses to impaired hormone synthesis. Thyroglobulin defects with goiter should be treated with LT4, even if TSH levels are normal.
ESTHER : Matsuyama_2022_Clin.Pediatr.Endocrinol_31_185
PubMedSearch : Matsuyama_2022_Clin.Pediatr.Endocrinol_31_185
PubMedID: 35928386
Gene_locus related to this paper: human-TG

Title : Effects of Rikkunshi-To, a Japanese kampo medicine, on donepezil-induced gastrointestinal side effects in mice - Yamamoto_2022_J.Pharmacol.Sci_150_123
Author(s) : Yamamoto K , Sato Y , Hagihara K , Kirikihira K , Jotaki A , Michihara A , Miyake Y
Ref : J Pharmacol Sci , 150 :123 , 2022
Abstract : Donepezil, an acetylcholinesterase inhibitor, is associated with gastrointestinal symptoms, such as nausea, vomiting, and anorexia, which may affect adherence to continuous therapy. Since Rikkunshi-To, a Japanese herbal medicine, activates the ghrelin signaling pathway and promotes gastrointestinal function, it is administered to prevent gastrointestinal symptoms. We herein investigated whether donepezil-induced gastrointestinal side effects in mice are ameliorated by Rikkunshi-To and if its therapeutic efficacy is mediated by ghrelin. Since pica behavior, the ingestion of kaolin, correlates with nausea and vomiting in humans, donepezil was intraperitoneally administered with or without Rikkunshi-To daily to mice, and food and kaolin intakes were monitored. The effects of donepezil on intestinal motility and a ghrelin receptor antagonist on donepezil-induced pica behavior, anorexia, and changes in intestinal motility were examined in mice treated with Rikkunshi-To. Pica behavior and anorexia were significantly induced by donepezil and significantly inhibited by Rikkunshi-To. Intestinal motility was significantly suppressed by donepezil and promoted by Rikkunshi-To. Furthermore, the therapeutic effects of Rikkunshi-To were antagonized by the ghrelin receptor antagonist. The present results support the therapeutic efficacy of Rikkunshi-To against donepezil-induced gastrointestinal side effects.
ESTHER : Yamamoto_2022_J.Pharmacol.Sci_150_123
PubMedSearch : Yamamoto_2022_J.Pharmacol.Sci_150_123
PubMedID: 36055750

Title : Serum cholinesterase as a prognostic biomarker for acute heart failure - Shiba_2021_Eur.Heart.J.Acute.Cardiovasc.Care__
Author(s) : Shiba M , Kato T , Morimoto T , Yaku H , Inuzuka Y , Tamaki Y , Ozasa N , Seko Y , Yamamoto E , Yoshikawa Y , Kitai T , Yamashita Y , Iguchi M , Nagao K , Kawase Y , Morinaga T , Toyofuku M , Furukawa Y , Ando K , Kadota K , Sato Y , Kuwahara K , Kimura T
Ref : Eur Heart J Acute Cardiovasc Care , : , 2021
Abstract : AIMS: The association between serum cholinesterase and prognosis in acute heart failure (AHF) remains to be elucidated. We investigated the serum cholinesterase level at discharge from hospitalization for AHF and its association with clinical outcomes in patients with AHF. METHODS AND RESULTS: Among 4056 patients enrolled in the Kyoto Congestive Heart Failure multicentre registry, we analysed 2228 patients with available serum cholinesterase data. The study population was classified into three groups according to serum cholinesterase level at discharge: low tertile (<180 U/L, N = 733), middle tertile (<=180 U/L and <240 U/L, N = 746), and high tertile (<=240 U/L, N = 749). Patients in the low tertile had higher tricuspid pressure gradient, greater inferior vena cava diameter, and higher brain natriuretic peptide (BNP) levels than those in the high tertile. The cumulative 1-year incidence of the primary outcome measure (a composite endpoint of all-cause death and hospitalization for HF) was higher in the low and middle tertiles than in the high tertile [46.5% (low tertile) and 31.4% (middle tertile) vs. 22.1% (high tertile), P < 0.0001]. After adjustment for 26 variables, the excess risk of the low tertile relative to the high tertile for the primary outcome measure remained significant (hazard ratio 1.37, 95% confidence interval 1.10-1.70, P = 0.006). Restricted cubic spline models below the median of cholinesterase demonstrated incrementally higher hazards at low cholinesterase levels. CONCLUSIONS: Low serum cholinesterase levels are associated with congestive findings on echocardiography, higher BNP, and higher risks for a composite of all-cause death and HF hospitalization in patients with AHF.
ESTHER : Shiba_2021_Eur.Heart.J.Acute.Cardiovasc.Care__
PubMedSearch : Shiba_2021_Eur.Heart.J.Acute.Cardiovasc.Care__
PubMedID: 33580775

Title : Structural and catalytic effects of surface loop-helix transplantation within haloalkane dehalogenase family - Marek_2020_Comput.Struct.Biotechnol.J_18_1352
Author(s) : Marek M , Chaloupkova R , Prudnikova T , Sato Y , Rezacova P , Nagata Y , Kuta Smatanova I , Damborsky J
Ref : Comput Struct Biotechnol J , 18 :1352 , 2020
Abstract : Engineering enzyme catalytic properties is important for basic research as well as for biotechnological applications. We have previously shown that the reshaping of enzyme access tunnels via the deletion of a short surface loop element may yield a haloalkane dehalogenase variant with markedly modified substrate specificity and enantioselectivity. Here, we conversely probed the effects of surface loop-helix transplantation from one enzyme to another within the enzyme family of haloalkane dehalogenases. Precisely, we transplanted a nine-residue long extension of L9 loop and beta4 helix from DbjA into the corresponding site of DbeA. Biophysical characterization showed that this fragment transplantation did not affect the overall protein fold or oligomeric state, but lowered protein stability (DeltaT (m) = -5 to 6 degC). Interestingly, the crystal structure of DbeA mutant revealed the unique structural features of enzyme access tunnels, which are known determinants of catalytic properties for this enzyme family. Biochemical data confirmed that insertion increased activity of DbeA with various halogenated substrates and altered its enantioselectivity with several linear beta-bromoalkanes. Our findings support a protein engineering strategy employing surface loop-helix transplantation for construction of novel protein catalysts with modified catalytic properties.
ESTHER : Marek_2020_Comput.Struct.Biotechnol.J_18_1352
PubMedSearch : Marek_2020_Comput.Struct.Biotechnol.J_18_1352
PubMedID: 32612758
Gene_locus related to this paper: brael-e2rv62

Title : Shear Wave Dispersion Predicts Liver Fibrosis and Adverse Outcomes in Patients with Heart Failure - Ohara_2020_J.Clin.Med_9_
Author(s) : Ohara H , Yoshihisa A , Ishibashi S , Matsuda M , Yamadera Y , Sugawara Y , Ichijo Y , Hotsuki Y , Watanabe K , Anzai F , Sato Y , Kimishima Y , Yokokawa T , Misaka T , Sato T , Oikawa M , Kobayashi A , Takeishi Y
Ref : J Clin Med , 9 : , 2020
Abstract : BACKGROUND: It has been recently reported that liver stiffness assessed by transient elastography reflects right atrial pressure (RAP) and is associated with worse outcomes in patients with heart failure (HF). However, the relationship between shear wave dispersion (SWD, a novel indicator of liver viscosity) determined by abdominal ultrasonography and RAP, and the prognostic impact of SWD on HF patients have not been fully examined. We aimed to clarify the associations of SWD with parameters of liver function test (LFT) and right heart catheterization (RHC), as well as with cardiac events such as cardiac death and worsening HF, in patients with HF. METHODS: We performed abdominal ultrasonography, LFT and RHC in HF patients (n = 195), and followed up for cardiac events. We examined associations between SWD and parameters of LFT and RHC. RESULTS: There were significant correlations between SWD and circulating levels of direct bilirubin (R = 0.222, p = 0.002), alkaline phosphatase (R = 0.219, p = 0.002), cholinesterase (R = -0.184, p = 0.011), and 7S domain of collagen type IV (R = 0.177, p = 0.014), but not with RAP (R = 0.054, p = 0.567) or cardiac index (R = -0.015, p = 0.872). In the Kaplan-Meier analysis, cardiac event rate was significantly higher in the high SWD group (SWD >= 10.0 (m/s)/kHz, n = 103) than in the low SWD group (SWD < 10.0 (m/s)/kHz, n = 92; log-rank, p = 0.010). In the Cox proportional hazard analysis, high SWD was associated with high cardiac event rates (hazard ratio, 2.841; 95% confidence interval, 1.234-6.541, p = 0.014). In addition, there were no interactions between SWD and all subgroups, according to the subgroup analysis. CONCLUSIONS: SWD assessed by abdominal ultrasonography reflects liver fibrosis rather than liver congestion, and is associated with adverse prognosis in HF patients.
ESTHER : Ohara_2020_J.Clin.Med_9_
PubMedSearch : Ohara_2020_J.Clin.Med_9_
PubMedID: 33291248

Title : Acute Respiratory Infection in Human Dipeptidyl Peptidase 4-Transgenic Mice Infected with Middle East Respiratory Syndrome Coronavirus - Iwata-Yoshikawa_2019_J.Virol_93_
Author(s) : Iwata-Yoshikawa N , Okamura T , Shimizu Y , Kotani O , Sato H , Sekimukai H , Fukushi S , Suzuki T , Sato Y , Takeda M , Tashiro M , Hasegawa H , Nagata N
Ref : J Virol , 93 : , 2019
Abstract : Middle East respiratory syndrome coronavirus (MERS-CoV) infection can manifest as a mild illness, acute respiratory distress, organ failure, or death. Several animal models have been established to study disease pathogenesis and to develop vaccines and therapeutic agents. Here, we developed transgenic (Tg) mice on a C57BL/6 background; these mice expressed human CD26/dipeptidyl peptidase 4 (hDPP4), a functional receptor for MERS-CoV, under the control of an endogenous hDPP4 promoter. We then characterized this mouse model of MERS-CoV. The expression profile of hDPP4 in these mice was almost equivalent to that in human tissues, including kidney and lung; however, hDPP4 was overexpressed in murine CD3-positive cells within peripheral blood and lymphoid tissues. Intranasal inoculation of young and adult Tg mice with MERS-CoV led to infection of the lower respiratory tract and pathological evidence of acute multifocal interstitial pneumonia within 7 days, with only transient loss of body weight. However, the immunopathology in young and adult Tg mice was different. On day 5 or 7 postinoculation, lungs of adult Tg mice contained higher levels of proinflammatory cytokines and chemokines associated with migration of macrophages. These results suggest that the immunopathology of MERS-CoV infection in the Tg mouse is age dependent. The mouse model described here will increase our understanding of disease pathogenesis and host mediators that protect against MERS-CoV infection.IMPORTANCE Middle East respiratory syndrome coronavirus (MERS-CoV) infections are endemic in the Middle East and a threat to public health worldwide. Rodents are not susceptible to the virus because they do not express functional receptors; therefore, we generated a new animal model of MERS-CoV infection based on transgenic mice expressing human DPP4 (hDPP4). The pattern of hDPP4 expression in this model was similar to that in human tissues (except lymphoid tissue). In addition, MERS-CoV was limited to the respiratory tract. Here, we focused on host factors involved in immunopathology in MERS-CoV infection and clarified differences in antiviral immune responses between young and adult transgenic mice. This new small-animal model could contribute to more in-depth study of the pathology of MERS-CoV infection and aid development of suitable treatments.
ESTHER : Iwata-Yoshikawa_2019_J.Virol_93_
PubMedSearch : Iwata-Yoshikawa_2019_J.Virol_93_
PubMedID: 30626685

Title : Structural insights into modulation and selectivity of transsynaptic neurexin-LRRTM interaction - Yamagata_2018_Nat.Commun_9_3964
Author(s) : Yamagata A , Goto-Ito S , Sato Y , Shiroshima T , Maeda A , Watanabe M , Saitoh T , Maenaka K , Terada T , Yoshida T , Uemura T , Fukai S
Ref : Nat Commun , 9 :3964 , 2018
Abstract : Leucine-rich repeat transmembrane neuronal proteins (LRRTMs) function as postsynaptic organizers that induce excitatory synapses. Neurexins (Nrxns) and heparan sulfate proteoglycans have been identified as presynaptic ligands for LRRTMs. Specifically, LRRTM1 and LRRTM2 bind to the Nrxn splice variant lacking an insert at the splice site 4 (S4). Here, we report the crystal structure of the Nrxn1beta-LRRTM2 complex at 3.4 A resolution. The Nrxn1beta-LRRTM2 interface involves Ca(2+)-mediated interactions and overlaps with the Nrxn-neuroligin interface. Together with structure-based mutational analyses at the molecular and cellular levels, the present structural analysis unveils the mechanism of selective binding between Nrxn and LRRTM1/2 and its modulation by the S4 insertion of Nrxn.
ESTHER : Yamagata_2018_Nat.Commun_9_3964
PubMedSearch : Yamagata_2018_Nat.Commun_9_3964
PubMedID: 30262834

Title : Neuroligin-induced presynaptic differentiation through SLM2-mediated splicing modifications of neurexin in cerebellar cultures - Sato_2017_Biochem.Biophys.Res.Commun_493_1030
Author(s) : Sato Y , Suzuki S , Iijima Y , Iijima T
Ref : Biochemical & Biophysical Research Communications , 493 :1030 , 2017
Abstract : Neurexins (NRXs) and neuroligins (NLs) play important roles in synapse specification. The alternatively spliced segment 4 (AS4) of NRX genes (Nrxn) is a critical element in selective trans-synaptic interactions. However, the role of splicing of NRXs and NLs in synapse specification is not fully understood. To investigate the exact role of splice-dependent NRX-NL interaction in the specification of glutamatergic and gamma-aminobutyric acid (GABA)-ergic synapses in the cerebellum, we evaluated the synaptogenic receptor activity of NL1/2/3 isoforms in a neuron-fibroblast co-culture system, in which the Nrxn AS4 segments are manipulated using SLM2, a selective and dominant regulator of AS4 splicing. We show that ectopic SLM2 expression (SLM2 E/E) causes marked skipping of exon 20 of AS4 in cerebellar neuron culture. Whereas NLs can induce VAMP2(+) presynaptic contacts from mainly glutamatergic neurons in both uninfected (control) and SLM2 E/E co-cultures, they induce VGAT(+) GABAergic contacts in the control culture, but not properly in the SLM2 E/E culture. Furthermore, Nrxn3 is responsible for the NL-induced assembly of GABAergic synapses in co-culture. Importantly, lentivirus-based expression of Nrxn3 containing exon 20 restores the reduced NL-induced GABAergic contacts in the SLM2 E/E co-culture. Therefore, our findings may provide further insights into NRX-NL mediated synapse specification.
ESTHER : Sato_2017_Biochem.Biophys.Res.Commun_493_1030
PubMedSearch : Sato_2017_Biochem.Biophys.Res.Commun_493_1030
PubMedID: 28939043

Title : PARASITIC PLANTS. Probing strigolactone receptors in Striga hermonthica with fluorescence - Tsuchiya_2015_Science_349_864
Author(s) : Tsuchiya Y , Yoshimura M , Sato Y , Kuwata K , Toh S , Holbrook-Smith D , Zhang H , McCourt P , Itami K , Kinoshita T , Hagihara S
Ref : Science , 349 :864 , 2015
Abstract : Elucidating the signaling mechanism of strigolactones has been the key to controlling the devastating problem caused by the parasitic plant Striga hermonthica. To overcome the genetic intractability that has previously interfered with identification of the strigolactone receptor, we developed a fluorescence turn-on probe, Yoshimulactone Green (YLG), which activates strigolactone signaling and illuminates signal perception by the strigolactone receptors. Here we describe how strigolactones bind to and act via ShHTLs, the diverged family of alpha/beta hydrolase-fold proteins in Striga. Live imaging using YLGs revealed that a dynamic wavelike propagation of strigolactone perception wakes up Striga seeds. We conclude that ShHTLs function as the strigolactone receptors mediating seed germination in Striga. Our findings enable access to strigolactone receptors and observation of the regulatory dynamics for strigolactone signal transduction in Striga.
ESTHER : Tsuchiya_2015_Science_349_864
PubMedSearch : Tsuchiya_2015_Science_349_864
PubMedID: 26293962
Gene_locus related to this paper: strhe-ShHTL2 , strhe-ShHTL10 , strhe-ShHTL6 , strhe-ShHTL9 , strhe-ShHTL8 , strhe-ShHTL11 , strhe-ShD14 , strhe-ShHTL4 , strhe-ShHTL1 , strhe-ShHTL7 , strhe-ShHTL3 , strhe-ShHTL5

Title : Structural and functional analysis of a novel haloalkane dehalogenase with two halide-binding sites - Chaloupkova_2014_Acta.Crystallogr.D.Biol.Crystallogr_70_1884
Author(s) : Chaloupkova R , Prudnikova T , Rezacova P , Prokop Z , Koudelakova T , Daniel L , Brezovsky J , Ikeda-Ohtsubo W4 , Sato Y , Kuty M , Nagata Y , Kuta Smatanova I , Damborsky J
Ref : Acta Crystallographica D Biol Crystallogr , 70 :1884 , 2014
Abstract : The crystal structure of the novel haloalkane dehalogenase DbeA from Bradyrhizobium elkanii USDA94 revealed the presence of two chloride ions buried in the protein interior. The first halide-binding site is involved in substrate binding and is present in all structurally characterized haloalkane dehalogenases. The second halide-binding site is unique to DbeA. To elucidate the role of the second halide-binding site in enzyme functionality, a two-point mutant lacking this site was constructed and characterized. These substitutions resulted in a shift in the substrate-specificity class and were accompanied by a decrease in enzyme activity, stability and the elimination of substrate inhibition. The changes in enzyme catalytic activity were attributed to deceleration of the rate-limiting hydrolytic step mediated by the lower basicity of the catalytic histidine.
ESTHER : Chaloupkova_2014_Acta.Crystallogr.D.Biol.Crystallogr_70_1884
PubMedSearch : Chaloupkova_2014_Acta.Crystallogr.D.Biol.Crystallogr_70_1884
PubMedID: 25004965
Gene_locus related to this paper: brael-e2rv62

Title : Conclusive identification of the oxybutynin-hydrolyzing enzyme in human liver - Sato_2012_Drug.Metab.Dispos_40_902
Author(s) : Sato Y , Miyashita A , Iwatsubo T , Usui T
Ref : Drug Metabolism & Disposition: The Biological Fate of Chemicals , 40 :902 , 2012
Abstract : The aim of this study was to conclusively determine the enzyme responsible for the hydrolysis of oxybutynin in human liver. Hydrolysis in human liver microsomes (HLMs) and human liver cytosol (HLC) followed Michaelis-Menten kinetics with similar K(m) values. In recombinant human carboxylesterase (CES)-expressing microsomes, CES1 was much more efficient than CES2 and yielded a K(m) value more comparable with that found in HLMs or HLC than did CES2. A correlation analysis using a set of individual HLMs, in which both CESs acted independently showed that the hydrolysis rate of oxybutynin, correlated significantly with a CES1 marker reaction, clopidogrel hydrolysis, but not with a CES2 marker reaction, irinotecan (CPT-11) hydrolysis. Chemical inhibition studies using bis-(p-nitrophenyl) phosphate, clopidogrel, nordihydroguaiaretic acid, procainamide, physostigmine, and loperamide revealed that the effects of these compounds in HLMs, HLC, and recombinant CES1-expressing microsomes were similar, whereas those in CES2-expressing microsomes were clearly different. These results strongly suggest that CES1, rather than CES2, is the principal enzyme responsible for the hydrolysis of oxybutynin in human liver..
ESTHER : Sato_2012_Drug.Metab.Dispos_40_902
PubMedSearch : Sato_2012_Drug.Metab.Dispos_40_902
PubMedID: 22293119

Title : Role of dipeptidyl peptidase IV (DPP4) in the development of dyslipidemia: DPP4 contributes to the steroid metabolism pathway - Sato_2011_Life.Sci_88_43
Author(s) : Sato Y , Koshioka S , Kirino Y , Kamimoto T , Kawazoe K , Abe S , Minakuchi K , Nakahori Y
Ref : Life Sciences , 88 :43 , 2011
Abstract : AIMS: We previously reported that dipeptidyl peptidase IV (DPP4)-deficient rats were susceptible to dyslipidemia induced by streptozotocin (STZ). Hence, it is suggested that DPP4 is important for lipid metabolism. MAIN METHODS: In this study, to verify the role of DPP4 in the development of dyslipidemia, we carried out a microarray analysis of the livers of STZ-treated wild-type and DPP4-deficient rats and showed that the expression levels of genes involved in metabolic processes (steroid metabolic processes and cellular lipid metabolic processes) were significantly altered by STZ treatment. KEY FINDINGS: In the wild-type rats, the expression of hydroxysteroid (17-beta) dehydrogenase 2 (Hsd7b2), which catalyzes sex steroid synthesis from cholesterol, was significantly increased by about 15-fold after STZ treatment; however, it did not change in the DPP4-deficient rats. In the STZ untreated group of DPP4-deficient rats, the expression levels of cytochrome P450, subfamily 51 (Cyp51) and sterol-C4-methyl oxidase-like (Sc4mol), which catalyze intermediate steps in cholesterol synthesis, were significantly elevated compared to those of other groups. Similar results were demonstrated in HuH7-cells after DPP4 overexpression or the addition of human sera containing DPP4. SIGNIFICANCE: DPP4 is crucial for regulating the expression of factors related to steroid metabolism such as Cyp51, Sc4mol, and Hsd17b2, and DPP4 deficiency or inhibition may cause dyslipidemia.
ESTHER : Sato_2011_Life.Sci_88_43
PubMedSearch : Sato_2011_Life.Sci_88_43
PubMedID: 21047519

Title : Altered dipeptidyl peptidase-4 activity during the progression of hyperinsulinemic obesity and islet atrophy in spontaneously late-stage type 2 diabetic rats - Kirino_2011_Am.J.Physiol.Endocrinol.Metab_300_E372
Author(s) : Kirino Y , Sato Y , Kamimoto T , Kawazoe K , Minakuchi K
Ref : American Journal of Physiology Endocrinol Metab , 300 :E372 , 2011
Abstract : Altered dipeptidyl peptidase-4 (DPP4) activity during the progression of late-stage type 2 diabetes was measured in Otsuka Long-Evans Tokushima fatty (OLETF) rats. Compared with OLETF rats subjected to 30% food restriction, food-satiated OLETF rats exhibited spontaneous hyperphagic obesity, insulin resistance, hyperglycemia, hyperinsulinemia, and increased plasma DPP4 activity during the early phase of the experiment (up to approximately 30 wk). Subsequently, their plasma DPP4 activity as well as their body weight, body fat, and plasma insulin concentration declined to control levels during the late phase, resulting in excessive polyuria, proteinuria, dyslipidemia, pancreatic islet atrophy, hypoinsulinemia, and diabetes, which changed from insulin-resistant diabetes to hypoinsulinemic diabetes secondary to progressive islet insufficiency, and their fasting blood glucose level remained high. Since plasma DPP4 activity demonstrated significant positive correlations with body weight and the fasting plasma insulin level but not with the fasting blood glucose level during the late stage of diabetes, body fat and fasting plasma insulin levels may be useful factors for predicting the control of plasma DPP4 activity. In contrast, pancreatic DPP4 activity was significantly increased, and the expression of pancreatic insulin was significantly reduced in late-stage diabetic OLETF rats, suggesting that a relationship exists between the activation of pancreatic DPP4 and insulin depletion in pancreatic islet atrophy. In conclusion, it is suggested that plasma DPP4 activity changes in accordance with the progression of hyperinsulinemic obesity and pancreatic islet atrophy. DPP4 activity may play an important role in insulin homeostasis.
ESTHER : Kirino_2011_Am.J.Physiol.Endocrinol.Metab_300_E372
PubMedSearch : Kirino_2011_Am.J.Physiol.Endocrinol.Metab_300_E372
PubMedID: 21139073

Title : The Selaginella genome identifies genetic changes associated with the evolution of vascular plants - Banks_2011_Science_332_960
Author(s) : Banks JA , Nishiyama T , Hasebe M , Bowman JL , Gribskov M , dePamphilis C , Albert VA , Aono N , Aoyama T , Ambrose BA , Ashton NW , Axtell MJ , Barker E , Barker MS , Bennetzen JL , Bonawitz ND , Chapple C , Cheng C , Correa LG , Dacre M , DeBarry J , Dreyer I , Elias M , Engstrom EM , Estelle M , Feng L , Finet C , Floyd SK , Frommer WB , Fujita T , Gramzow L , Gutensohn M , Harholt J , Hattori M , Heyl A , Hirai T , Hiwatashi Y , Ishikawa M , Iwata M , Karol KG , Koehler B , Kolukisaoglu U , Kubo M , Kurata T , Lalonde S , Li K , Li Y , Litt A , Lyons E , Manning G , Maruyama T , Michael TP , Mikami K , Miyazaki S , Morinaga S , Murata T , Mueller-Roeber B , Nelson DR , Obara M , Oguri Y , Olmstead RG , Onodera N , Petersen BL , Pils B , Prigge M , Rensing SA , Riano-Pachon DM , Roberts AW , Sato Y , Scheller HV , Schulz B , Schulz C , Shakirov EV , Shibagaki N , Shinohara N , Shippen DE , Sorensen I , Sotooka R , Sugimoto N , Sugita M , Sumikawa N , Tanurdzic M , Theissen G , Ulvskov P , Wakazuki S , Weng JK , Willats WW , Wipf D , Wolf PG , Yang L , Zimmer AD , Zhu Q , Mitros T , Hellsten U , Loque D , Otillar R , Salamov A , Schmutz J , Shapiro H , Lindquist E , Lucas S , Rokhsar D , Grigoriev IV
Ref : Science , 332 :960 , 2011
Abstract : Vascular plants appeared ~410 million years ago, then diverged into several lineages of which only two survive: the euphyllophytes (ferns and seed plants) and the lycophytes. We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported. By comparing gene content in evolutionarily diverse taxa, we found that the transition from a gametophyte- to a sporophyte-dominated life cycle required far fewer new genes than the transition from a nonseed vascular to a flowering plant, whereas secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in posttranscriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the trans-acting small interfering RNA pathway, and extensive RNA editing of organellar genes.
ESTHER : Banks_2011_Science_332_960
PubMedSearch : Banks_2011_Science_332_960
PubMedID: 21551031
Gene_locus related to this paper: selml-d8qua5 , selml-d8qva1 , selml-d8qyh7 , selml-d8qza0 , selml-d8r5d4 , selml-d8r6d4 , selml-d8r504 , selml-d8r506 , selml-d8rbi1 , selml-d8rbs1 , selml-d8rck8 , selml-d8rf38 , selml-d8rkl6 , selml-d8rpr1 , selml-d8rpy0 , selml-d8ru47 , selml-d8ry54 , selml-d8rzp6 , selml-d8rzy7 , selml-d8s0c9 , selml-d8s0u3 , selml-d8s2t1 , selml-d8s3z8 , selml-d8s401 , selml-d8sba6 , selml-d8sch9 , selml-d8spq2 , selml-d8sq37 , selml-d8ssx7 , selml-d8swp2 , selml-d8t7a3 , selml-d8t8v4 , selml-d8taz4 , selml-d8tdq6 , selml-d8rai8 , selml-d8qt54 , selml-d8r2d8 , selml-d8rmd3 , selml-d8rra9 , selml-d8slg4 , selml-d8swp0 , selml-d8s7i0 , selml-d8qz37 , selml-d8sz00 , selml-d8s776 , selml-d8qw15 , selml-d8ska7 , selml-d8t0c4 , selml-d8r194 , selml-d8s5m8 , selml-d8s7r2 , selml-d8ta80 , selml-d8ru55

Title : Stereoselectivity and conformational stability of haloalkane dehalogenase DbjA from Bradyrhizobium japonicum USDA110: the effect of pH and temperature - Chaloupkova_2011_FEBS.J_278_2728
Author(s) : Chaloupkova R , Prokop Z , Sato Y , Nagata Y , Damborsky J
Ref : Febs J , 278 :2728 , 2011
Abstract : The effect of pH and temperature on structure, stability, activity and enantioselectivity of haloalkane dehalogenase DbjA from Bradyrhizobium japonicum USDA110 was investigated in this study. Conformational changes have been assessed by circular dichroism spectroscopy, functional changes by kinetic analysis, while quaternary structure was studied by gel filtration chromatography. Our study shows that the DbjA enzyme is highly tolerant to pH changes. Its secondary and tertiary structure was not affected by pH in the ranges 5.3-10.3 and 6.2-10.1, respectively. Oligomerization of DbjA was strongly pH-dependent: monomer, dimer, tetramer and a high molecular weight cluster of the enzyme were distinguished in solution at different pH conditions. Moreover, different oligomeric states of DbjA possessed different thermal stabilities. The highest melting temperature (T(m) = 49.1 +/- 0.2 degrees C) was observed at pH 6.5, at which the enzyme occurs in dimeric form. Maximal activity was detected at 50 degrees C and in the pH interval 7.7-10.4. While pH did not have any effect on enantiodiscriminination of DbjA, temperature significantly altered DbjA enantioselectivity. A decrease in temperature results in significantly enhanced enantioselectivity. The temperature dependence of DbjA enantioselectivity was analysed with 2-bromobutane, 2-bromopentane, methyl 2-bromopropionate and ethyl 2-bromobutyrate, and differential activation parameters Delta(R-S)DeltaH and Delta(R-S)DeltaS were determined. The thermodynamic analysis revealed that the resolution of beta-bromoalkanes was driven by both enthalpic and entropic terms, while the resolution of alpha-bromoesters was driven mainly by an enthalpic term. Unique catalytic activity and structural stability of DbjA in a broad pH range, combined with high enantioselectivity with particular substrates, make this enzyme a very versatile biocatalyst. Enzyme EC3.8.1.5 haloalkane dehalogenase.
ESTHER : Chaloupkova_2011_FEBS.J_278_2728
PubMedSearch : Chaloupkova_2011_FEBS.J_278_2728
PubMedID: 21635695

Title : Chronic administration of DSP-7238, a novel, potent, specific and substrate-selective DPP IV inhibitor, improves glycaemic control and beta-cell damage in diabetic mice - Furuta_2010_Diabetes.Obes.Metab_12_421
Author(s) : Furuta Y , Horiguchi M , Sugaru E , Ono-Kishino M , Otani M , Sakai M , Masui Y , Tsuchida A , Sato Y , Takubo K , Hochigai H , Kimura H , Nakahira H , Nakagawa T , Taiji M
Ref : Diabetes Obes Metab , 12 :421 , 2010
Abstract : AIMS: The purpose of this study is to assess the in vitro enzyme inhibition profile of DSP-7238, a novel non-cyanopyrrolidine dipeptidyl peptidase (DPP) IV inhibitor and to evaluate the acute and chronic effects of this compound on glucose metabolism in two different mouse models of type 2 diabetes. METHODS: The in vitro enzyme inhibition profile of DSP-7238 was assessed using plasma and recombinant enzymes including DPP IV, DPP II, DPP8, DPP9 and fibroblast activation protein alpha (FAPalpha) with fluorogenic substrates. The inhibition type was evaluated based on the Lineweaver-Burk plot. Substrate selectivity of DSP-7238 and comparator DPP IV inhibitors (vildagliptin, sitagliptin, saxagliptin and linagliptin) was evaluated by mass spectrometry based on the changes in molecular weight of peptide substrates caused by release of N-terminal dipeptides. In the in vivo experiments, high-fat diet-induced obese (DIO) mice were subjected to oral glucose tolerance test (OGTT) following a single oral administration of DSP-7238. To assess the chronic effects of DSP-7238 on glycaemic control and pancreatic beta-cell damage, DSP-7238 was administered for 11 weeks to mice made diabetic by a combination of high-fat diet (HFD) and a low-dose of streptozotocin (STZ). After the dosing period, HbA1c was measured and pancreatic damage was evaluated by biological and histological analyses. RESULTS: DSP-7238 and sitagliptin both competitively inhibited recombinant human DPP IV (rhDPP IV) with K(i) values of 0.60 and 2.1 nM respectively. Neither vildagliptin nor saxagliptin exhibited competitive inhibition of rhDPP IV. DSP-7238 did not inhibit DPP IV-related enzymes including DPP8, DPP9, DPP II and FAPalpha, whereas vildagliptin and saxagliptin showed inhibition of DPP8 and DPP9. Inhibition of glucagon-like peptide-1 (GLP-1) degradation by DSP-7238 was apparently more potent than its inhibition of chemokine (C-X-C motif) ligand 10 (IP-10) or chemokine (C-X-C motif) ligand 12 (SDF-1alpha) degradation. In contrast, vildagliptin and saxagliptin showed similar degree of inhibition of degradation for all the substrates tested. Compared to treatment with the vehicle, single oral administration of DSP-7238 dose-dependently decreased plasma DPP IV activity and improved glucose tolerance in DIO mice. In addition, DSP-7238 significantly decreased HbA1c and ameliorated pancreatic damage following 11 weeks of chronic treatment in HFD/STZ mice. CONCLUSIONS: We have shown in this study that DSP-7238 is a potent DPP IV inhibitor that has high specificity for DPP IV and substrate selectivity against GLP-1. We have also found that chronic treatment with DSP-7238 improves glycaemic control and ameliorates beta-cell damage in a mouse model with impaired insulin sensitivity and secretion. These findings indicate that DSP-7238 may be a new therapeutic agent for the treatment of type 2 diabetes.
ESTHER : Furuta_2010_Diabetes.Obes.Metab_12_421
PubMedSearch : Furuta_2010_Diabetes.Obes.Metab_12_421
PubMedID: 20415690

Title : Identification of a novel biomarker for oxidative stress induced by hydrogen peroxide in primary human hepatocytes using the 2-nitrobenzenesulfenyl chloride isotope labeling method - Takami_2010_Hepatol.Res_40_438
Author(s) : Takami Y , Uto H , Tamai T , Sato Y , Ishida Y , Morinaga H , Sakakibara Y , Moriuchi A , Oketani M , Ido A , Nakajima T , Okanoue T , Tsubouchi H
Ref : Hepatol Res , 40 :438 , 2010
Abstract : AIM: Oxidative stress is involved in the progression of non-alcoholic steatohepatitis (NASH). However, there are few biomarkers that are easily measured and accurately reflect the disease states. The aim of this study was to identify novel oxidative stress markers using the 2-nitrobenzenesulfenyl (NBS) stable isotope labeling method and to examine the clinical utility of these diagnostic markers for NASH. METHODS: Proteins extracted from phosphate buffered saline- and hydrogen peroxide-loaded human primary hepatocyte were labeled with the [(12)C]- and [(13)C]-NBS reagents, respectively. Pairs of peaks with 6-Da differences in which the [(13)C]-NBS labeling was more intense than the [(12)C]-NBS labeling were detected by MALDI-TOF/MS and identified by MS/MS ion searching. RESULTS: Four pairs of peaks, m/z 1705-1711, m/z 1783-1789, m/z 1902-1908 and m/z 2790-2796, were identified as cytochrome c oxidase VIb (COX6B), liver carboxylesterase 1 (CES1), carbamoyl-phosphate synthase 1 (CPS1) and superoxide dismutase (MnSOD), respectively. Furthermore, serum MnSOD protein levels were significantly higher in NASH patients than in simple steatosis (SS) patients. The serum MnSOD levels tended to increase in parallel with the stage of fibrosis. CONCLUSION: The NBS labeling technique was useful to identify biomarkers. Serum MnSOD may be a useful biomarker that can distinguish between SS and NASH.
ESTHER : Takami_2010_Hepatol.Res_40_438
PubMedSearch : Takami_2010_Hepatol.Res_40_438
PubMedID: 20236361

Title : Enantioselectivity of haloalkane dehalogenases and its modulation by surface loop engineering -
Author(s) : Prokop Z , Sato Y , Brezovsky J , Mozga T , Chaloupkova R , Koudelakova T , Jerabek P , Stepankova V , Natsume R , van Leeuwen JG , Janssen DB , Florian J , Nagata Y , Senda T , Damborsky J
Ref : Angew Chem Int Ed Engl , 49 :6111 , 2010
PubMedID: 20645368
Gene_locus related to this paper: braja-dhaa

Title : Increased plasma dipeptidyl peptidase IV (DPP IV) activity and decreased DPP IV activity of visceral but not subcutaneous adipose tissue in impaired glucose tolerance rats induced by high-fat or high-sucrose diet - Kirino_2009_Biol.Pharm.Bull_32_463
Author(s) : Kirino Y , Kamimoto T , Sato Y , Kawazoe K , Minakuchi K , Nakahori Y
Ref : Biol Pharm Bull , 32 :463 , 2009
Abstract : Several studies have investigated whether dipeptidyl peptidase IV (DPP IV) activity is correlated to the severity of diabetes; however, it remains unclear. To investigate the roles of DPP IV activity in metabolic abnormalities, impaired glucose tolerance rats were produced using a high-fat (HF) or high-sucrose (HS) diet. HF diet-fed rats obviously exhibited impaired glucose tolerance, with increases in subcutaneous and epididymal fat mass, insulin resistance and dyslipidaemia. In rats fed a HS diet rather than a normal diet, lower body weight and fasting blood glucose were observed temporarily in the early period after HS diet feeding; however, impaired glucose tolerance was evoked to some extent with an increase in epididymal fat mass. Both HF and HS diet-fed rats showed significantly higher plasma DPP IV activity than normal diet-fed rats, in the order of HF diet>HS diet>normal diet. HF and HS diets did not significantly affect DPP IV activity and mRNA expression in the kidney. On the other hand, HF, but not HS, diet caused a significant decrease in DPP IV activity in the liver as compared to the control. Of note, both HF and HS diets caused a significant decrease in DPP IV activity in epididymal fat, even though they did not change DPP IV activity in subcutaneous fat. In conclusion, HF or HS diet-induced impaired glucose tolerance with visceral fat accumulation may be interrelated with increased plasma DPP IV activity and decreased DPP IV activity of visceral but not subcutaneous adipose tissue.
ESTHER : Kirino_2009_Biol.Pharm.Bull_32_463
PubMedSearch : Kirino_2009_Biol.Pharm.Bull_32_463
PubMedID: 19252296

Title : Interrelationship of dipeptidyl peptidase IV (DPP4) with the development of diabetes, dyslipidaemia and nephropathy: a streptozotocin-induced model using wild-type and DPP4-deficient rats - Kirino_2009_J.Endocrinol_200_53
Author(s) : Kirino Y , Sato Y , Kamimoto T , Kawazoe K , Minakuchi K , Nakahori Y
Ref : J Endocrinol , 200 :53 , 2009
Abstract : We examined the role of dipeptidyl peptidase IV (DPP4) in the development of diabetes, dyslipidaemia and renal dysfunction induced by streptozotocin (STZ). F344/DuCrlCrlj rats, which lack DPP4 activity, and wild-type rats were treated with STZ. Plasma DPP4 activity and biochemical parameters were measured until 42 days after STZ treatment. At the end of the experiment, renal function and DPP4 expressions of the kidney, liver, pancreas and adipose tissues were determined. Increases in blood glucose, cholesterol and triglycerides were evoked by STZ in both rat strains; however, the onset of hyperglycaemia was delayed in DPP4-deficient rats as compared with wild-type rats. By contrast, more severe dyslipidaemia was observed in DPP4-deficient rats than in wild-type rats after STZ treatment. Plasma DPP4 activity increased progressively with time after STZ treatment in wild-type rats. The kidney of wild-type rats showed decreased DPP4 activity with increased Dpp4 mRNA after STZ treatment. In addition, kidney weight, serum creatinine and excreted amounts of urinary protein, glucose and DPP4 enzyme were enhanced by STZ. DPP4-deficient rats showed increased serum creatinine in accordance with decreased creatinine clearance as compared with wild-type rats after STZ treatment. In conclusion, plasma DPP4 activity increased after STZ treatment, positively correlating to blood glucose. DPP4-deficient rats were resistant to developing diabetes, while susceptible to dyslipidaemia and reduction of glomerular filtration rate by STZ. DPP4 activation may be responsible for hyperglycaemia, lipid metabolism and preservation of renal function.
ESTHER : Kirino_2009_J.Endocrinol_200_53
PubMedSearch : Kirino_2009_J.Endocrinol_200_53
PubMedID: 18931022

Title : Crystallization and preliminary X-ray analysis of a novel haloalkane dehalogenase DbeA from Bradyrhizobium elkani USDA94 - Prudnikova_2009_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_65_353
Author(s) : Prudnikova T , Mozga T , Rezacova P , Chaloupkova R , Sato Y , Nagata Y , Brynda J , Kuty M , Damborsky J , Smatanova IK
Ref : Acta Crystallographica Sect F Struct Biol Cryst Commun , 65 :353 , 2009
Abstract : A novel enzyme, DbeA, belonging to the haloalkane dehalogenase family (EC 3.8.1.5) was isolated from Bradyrhizobium elkani USDA94. This haloalkane dehalogenase is closely related to the DbjA enzyme from B. japonicum USDA110 (71% sequence identity), but has different biochemical properties. DbeA is generally less active and has a higher specificity towards brominated and iodinated compounds than DbjA. In order to understand the altered activity and specificity of DbeA, its mutant variant DbeA1, which carries the unique fragment of DbjA, was also constructed. Both wild-type DbeA and DbeA1 were crystallized using the sitting-drop vapour-diffusion method. The crystals of DbeA belonged to the primitive orthorhombic space group P2(1)2(1)2(1), while the crystals of DbeA1 belonged to the monoclinic space group C2. Diffraction data were collected to 2.2 A resolution for both DbeA and DbeA1 crystals.
ESTHER : Prudnikova_2009_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_65_353
PubMedSearch : Prudnikova_2009_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_65_353
PubMedID: 19342778
Gene_locus related to this paper: brael-e2rv62

Title : Defect in non-yellow coloring 3, an alpha\/beta hydrolase-fold family protein, causes a stay-green phenotype during leaf senescence in rice - Morita_2009_Plant.J_59_940
Author(s) : Morita R , Sato Y , Masuda Y , Nishimura M , Kusaba M
Ref : Plant J , 59 :940 , 2009
Abstract : Chlorophyll degradation is an important phenomenon in the senescence process. It is necessary for the degradation of certain chlorophyll-protein complexes and thylakoid membranes during leaf senescence. Mutants retaining greenness during leaf senescence are known as 'stay-green' mutants. Non-functional type stay-green mutants, which possess defects in chlorophyll degradation, retain greenness but not leaf functionality during senescence. Here, we report a new stay-green mutant in rice, nyc3. nyc3 retained a higher chlorophyll a and chlorophyll b content than the wild-type but showed a decrease in other senescence parameters during dark incubation, suggesting that it is a non-functional stay-green mutant. In addition, a small amount of pheophytin a, a chlorophyll a-derivative without Mg(2+) ions in its tetrapyrrole ring, accumulated in the senescent leaves of nyc3. nyc3 shows a similar but weaker phenotype to stay green (sgr), another non-functional stay-green mutant in rice. The chlorophyll content of nyc3 sgr double mutants at the late stage of leaf senescence was also similar to that of sgr. Linkage analysis revealed that NYC3 is located near the centromere region of chromosome 6. Map-based cloning of genes near the centromere is very difficult because of the low recombination rate; however, we overcame this problem by using ionizing radiation-induced mutant alleles harboring deletions of hundreds of kilobases. Thus, it was revealed that NYC3 encodes a plastid-localizing alpha/beta hydrolase-fold family protein with an esterase/lipase motif. The possible function of NYC3 in the regulation of chlorophyll degradation is discussed.
ESTHER : Morita_2009_Plant.J_59_940
PubMedSearch : Morita_2009_Plant.J_59_940
PubMedID: 19453447
Gene_locus related to this paper: orysa-q69xr2

Title : The Rice Annotation Project Database (RAP-DB): 2008 update - Tanaka_2008_Nucleic.Acids.Res_36_D1028
Author(s) : Tanaka T , Antonio BA , Kikuchi S , Matsumoto T , Nagamura Y , Numa H , Sakai H , Wu J , Itoh T , Sasaki T , Aono R , Fujii Y , Habara T , Harada E , Kanno M , Kawahara Y , Kawashima H , Kubooka H , Matsuya A , Nakaoka H , Saichi N , Sanbonmatsu R , Sato Y , Shinso Y , Suzuki M , Takeda J , Tanino M , Todokoro F , Yamaguchi K , Yamamoto N , Yamasaki C , Imanishi T , Okido T , Tada M , Ikeo K , Tateno Y , Gojobori T , Lin YC , Wei FJ , Hsing YI , Zhao Q , Han B , Kramer MR , McCombie RW , Lonsdale D , O'Donovan CC , Whitfield EJ , Apweiler R , Koyanagi KO , Khurana JP , Raghuvanshi S , Singh NK , Tyagi AK , Haberer G , Fujisawa M , Hosokawa S , Ito Y , Ikawa H , Shibata M , Yamamoto M , Bruskiewich RM , Hoen DR , Bureau TE , Namiki N , Ohyanagi H , Sakai Y , Nobushima S , Sakata K , Barrero RA , Souvorov A , Smith-White B , Tatusova T , An S , An G , S OO , Fuks G , Messing J , Christie KR , Lieberherr D , Kim H , Zuccolo A , Wing RA , Nobuta K , Green PJ , Lu C , Meyers BC , Chaparro C , Piegu B , Panaud O , Echeverria M
Ref : Nucleic Acids Research , 36 :D1028 , 2008
Abstract : The Rice Annotation Project Database (RAP-DB) was created to provide the genome sequence assembly of the International Rice Genome Sequencing Project (IRGSP), manually curated annotation of the sequence, and other genomics information that could be useful for comprehensive understanding of the rice biology. Since the last publication of the RAP-DB, the IRGSP genome has been revised and reassembled. In addition, a large number of rice-expressed sequence tags have been released, and functional genomics resources have been produced worldwide. Thus, we have thoroughly updated our genome annotation by manual curation of all the functional descriptions of rice genes. The latest version of the RAP-DB contains a variety of annotation data as follows: clone positions, structures and functions of 31 439 genes validated by cDNAs, RNA genes detected by massively parallel signature sequencing (MPSS) technology and sequence similarity, flanking sequences of mutant lines, transposable elements, etc. Other annotation data such as Gnomon can be displayed along with those of RAP for comparison. We have also developed a new keyword search system to allow the user to access useful information. The RAP-DB is available at: http://rapdb.dna.affrc.go.jp/ and http://rapdb.lab.nig.ac.jp/.
ESTHER : Tanaka_2008_Nucleic.Acids.Res_36_D1028
PubMedSearch : Tanaka_2008_Nucleic.Acids.Res_36_D1028
PubMedID: 18089549
Gene_locus related to this paper: orysa-Q9FW17 , orysa-Q0JK71 , orysa-B9EWJ8 , orysa-Q5N7L1 , orysa-pir7a , orysa-q2qyj1 , orysj-q6yse8 , orysa-q6yzk1 , orysa-Q8S0U8 , orysa-q33aq0 , orysa-Q0J0A4 , orysi-a2z179 , orysi-a2zef2 , orysi-b8a7e6 , orysi-b8a7e7 , orysi-b8bfe5 , orysi-b8bhp9 , orysj-b9fi05 , orysj-b9fkb0 , orysj-cgep , orysj-q0djj0 , orysj-q0dud7 , orysj-q0jaf0 , orysj-q0jga1 , orysj-q5jl22 , orysj-q5jlw7 , orysj-q6h7q9 , orysj-q6yvk6 , orysj-q7f8x1 , orysj-q7xcx3 , orysj-q9fwm6 , orysj-q10j20 , orysj-q10ss2 , orysj-q69uw6 , orysj-q94d71 , orysj-q0iq98 , orysj-b9gbs4 , orysj-b9gbs1 , orysj-pla4 , orysj-pla1

Title : Comparison of efficacies of a dipeptidyl peptidase IV inhibitor and alpha-glucosidase inhibitors in oral carbohydrate and meal tolerance tests and the effects of their combination in mice - Yamazaki_2007_J.Pharmacol.Sci_104_29
Author(s) : Yamazaki K , Inoue T , Yasuda N , Sato Y , Nagakura T , Takenaka O , Clark R , Saeki T , Tanaka I
Ref : J Pharmacol Sci , 104 :29 , 2007
Abstract : E3024 (3-but-2-ynyl-5-methyl-2-piperazin-1-yl-3,5-dihydro-4H-imidazo[4,5-d]pyridazin-4- one tosylate) is a dipeptidyl peptidase IV (DPP-IV) inhibitor. Since the target of both DPP-IV inhibitors and alpha-glucosidase inhibitors is the lowering of postprandial hyperglycemia, we compared antihyperglycemic effects for E3024 and alpha-glucosidase inhibitors in various oral carbohydrate and meal tolerance tests using normal mice. In addition, we investigated the combination effects of E3024 and voglibose on blood glucose levels in a meal tolerance test using mice fed a high-fat diet. ER-235516-15 (the trifluoroacetate salt form of E3024, 1 mg/kg) lowered glucose excursions consistently, regardless of the kind of carbohydrate loaded. However, the efficacy of acarbose (10 mg/kg) and of voglibose (0.1 mg/kg) varied with the type of carbohydrate administered. The combination of E3024 (3 mg/kg) and voglibose (0.3 mg/kg) improved glucose tolerance additively, with the highest plasma active glucagon-like peptide-1 levels. This study shows that compared to alpha-glucosidase inhibitors, DPP-IV inhibitors may have more consistent efficacy to reduce postprandial hyperglycemia, independent of the types of carbohydrate contained in a meal, and that the combination of a DPP-IV inhibitor and an alpha-glucosidase inhibitor is expected to be a promising option for lowering postprandial hyperglycemia.
ESTHER : Yamazaki_2007_J.Pharmacol.Sci_104_29
PubMedSearch : Yamazaki_2007_J.Pharmacol.Sci_104_29
PubMedID: 17485917

Title : Synaptic scaffolding molecule (S-SCAM) membrane-associated guanylate kinase with inverted organization (MAGI)-2 is associated with cell adhesion molecules at inhibitory synapses in rat hippocampal neurons - Sumita_2007_J.Neurochem_100_154
Author(s) : Sumita K , Sato Y , Iida J , Kawata A , Hamano M , Hirabayashi S , Ohno K , Peles E , Hata Y
Ref : Journal of Neurochemistry , 100 :154 , 2007
Abstract : Synaptic scaffolding molecule (S-SCAM) is a synaptic protein, which harbors five or six PSD-95/Discs large/ZO-1 (PDZ), a guanylate kinase and two WW domains. It interacts with NMDA receptor subunits, neuroligin and beta-catenin, and is involved in the accumulation of neuroligin at excitatory synapses. In this study, we have demonstrated S-SCAM is localized at inhibitory synapses in rat primary cultured hippocampal neurons. We have identified beta-dystroglycan (beta-DG) as a binding partner for S-SCAM at inhibitory synapses. WW domains of S-SCAM bind to three sequences of beta-DG. We have also revealed that S-SCAM can interact with neuroligin 2, which is known to be exclusively localized at inhibitory synapses. The WW domains and the second PDZ domain of S-SCAM are involved in the interaction with neuroligin 2. Beta-DG, neuroligin 2 and S-SCAM form a tripartite complex in vitro. Neuroligin 2 is detected in the immunoprecipitates by anti-beta-DG antibody from rat brain. S-SCAM, beta-DG and neuroligin 2 are partially co-localized in rat hippocampal neurons. These data suggest that S-SCAM is associated with beta-DG and neuroligin 2 at inhibitory synapses, and functions as a linker between the dystrophin glycoprotein complex and the neurexin-neuroligin complex.
ESTHER : Sumita_2007_J.Neurochem_100_154
PubMedSearch : Sumita_2007_J.Neurochem_100_154
PubMedID: 17059560

Title : Curated genome annotation of Oryza sativa ssp. japonica and comparative genome analysis with Arabidopsis thaliana - Itoh_2007_Genome.Res_17_175
Author(s) : Itoh T , Tanaka T , Barrero RA , Yamasaki C , Fujii Y , Hilton PB , Antonio BA , Aono H , Apweiler R , Bruskiewich R , Bureau T , Burr F , Costa de Oliveira A , Fuks G , Habara T , Haberer G , Han B , Harada E , Hiraki AT , Hirochika H , Hoen D , Hokari H , Hosokawa S , Hsing YI , Ikawa H , Ikeo K , Imanishi T , Ito Y , Jaiswal P , Kanno M , Kawahara Y , Kawamura T , Kawashima H , Khurana JP , Kikuchi S , Komatsu S , Koyanagi KO , Kubooka H , Lieberherr D , Lin YC , Lonsdale D , Matsumoto T , Matsuya A , McCombie WR , Messing J , Miyao A , Mulder N , Nagamura Y , Nam J , Namiki N , Numa H , Nurimoto S , O'Donovan C , Ohyanagi H , Okido T , Oota S , Osato N , Palmer LE , Quetier F , Raghuvanshi S , Saichi N , Sakai H , Sakai Y , Sakata K , Sakurai T , Sato F , Sato Y , Schoof H , Seki M , Shibata M , Shimizu Y , Shinozaki K , Shinso Y , Singh NK , Smith-White B , Takeda J , Tanino M , Tatusova T , Thongjuea S , Todokoro F , Tsugane M , Tyagi AK , Vanavichit A , Wang A , Wing RA , Yamaguchi K , Yamamoto M , Yamamoto N , Yu Y , Zhang H , Zhao Q , Higo K , Burr B , Gojobori T , Sasaki T
Ref : Genome Res , 17 :175 , 2007
Abstract : We present here the annotation of the complete genome of rice Oryza sativa L. ssp. japonica cultivar Nipponbare. All functional annotations for proteins and non-protein-coding RNA (npRNA) candidates were manually curated. Functions were identified or inferred in 19,969 (70%) of the proteins, and 131 possible npRNAs (including 58 antisense transcripts) were found. Almost 5000 annotated protein-coding genes were found to be disrupted in insertional mutant lines, which will accelerate future experimental validation of the annotations. The rice loci were determined by using cDNA sequences obtained from rice and other representative cereals. Our conservative estimate based on these loci and an extrapolation suggested that the gene number of rice is approximately 32,000, which is smaller than previous estimates. We conducted comparative analyses between rice and Arabidopsis thaliana and found that both genomes possessed several lineage-specific genes, which might account for the observed differences between these species, while they had similar sets of predicted functional domains among the protein sequences. A system to control translational efficiency seems to be conserved across large evolutionary distances. Moreover, the evolutionary process of protein-coding genes was examined. Our results suggest that natural selection may have played a role for duplicated genes in both species, so that duplication was suppressed or favored in a manner that depended on the function of a gene.
ESTHER : Itoh_2007_Genome.Res_17_175
PubMedSearch : Itoh_2007_Genome.Res_17_175
PubMedID: 17210932
Gene_locus related to this paper: orysa-Q7XTC5 , orysa-Q852M6 , orysa-Q8GSE8 , orysa-Q9FYP7 , orysa-Q5ZA26 , orysa-Q5JLP6 , orysa-Q8H5P5 , orysa-Q7F1Y5 , orysa-cbp3 , orysa-cbpx , orysa-Q6YSZ8 , orysa-Q9FW17 , orysa-Q84QZ6 , orysa-Q0JK71 , orysa-B9EWJ8 , orysa-Q6ZDG6 , orysa-Q6ZDG5 , orysa-Q658B2 , orysa-Q5N7L1 , orysa-Q8RYV9 , orysa-Q8H3R3 , orysa-Q5SNH3 , orysa-pir7a , orysa-q2qnj4 , orysa-q2qyj1 , orysa-q2r077 , orysa-Q4VWY7 , orysa-q5smv5 , orysa-q5z901 , orysa-Q5ZBI5 , orysa-q6atz0 , orysa-q6i5q3 , orysa-q6j657 , orysa-q6k4q2 , orysj-q6yse8 , orysa-q6yy42 , orysa-q6yzk1 , orysa-q6z8b1 , orysa-q6z995 , orysa-q6zjq6 , orysa-q7x7y5 , orysa-Q7XC50 , orysa-q7xr62 , orysa-q7xr63 , orysa-q7xsg1 , orysa-q7xsq2 , orysa-q7xts6 , orysa-q7xv53 , orysa-Q8LQS5 , orysa-Q8RZ79 , orysa-Q8S0U8 , orysa-Q8W3C6 , orysa-Q9LHX5 , orysa-q53m20 , orysa-q53nd8 , orysa-q60e79 , orysa-q67iz2 , orysa-q67iz3 , orysa-q67iz7 , orysa-q67iz8 , orysa-q67j02 , orysa-q67j05 , orysa-q67j09 , orysa-q67j10 , orysa-q67tr6 , orysa-q67tv0 , orysa-q69j38 , orysa-q69y21 , orysa-q75hy1 , orysa-q75hy2 , orysa-Q0J0A4 , orysa-q651a8 , orysa-q652g4 , orysa-q688m8 , orysa-Q6H8G1 , orysi-a2z179 , orysi-a2zef2 , orysi-b8a7e6 , orysi-b8a7e7 , orysi-b8bfe5 , orysi-b8bhp9 , orysj-b9fi05 , orysj-q0djj0 , orysj-q0jaf0 , orysj-q0jga1 , orysj-q0jhi5 , orysj-q5jl22 , orysj-q5jlw7 , orysj-q6h7q9 , orysj-q6yvk6 , orysj-q7f8x1 , orysj-q7xcx3 , orysj-q9fwm6 , orysj-q10j20 , orysj-q10ss2 , orysj-q69uw6 , orysj-q94d71 , orysj-q0iq98 , orysj-b9gbs4 , orysj-b9gbs1

Title : Crystallization and preliminary crystallographic analysis of a haloalkane dehalogenase, DbjA, from Bradyrhizobium japonicum USDA110 - Sato_2007_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_63_294
Author(s) : Sato Y , Natsume R , Tsuda M , Damborsky J , Nagata Y , Senda T
Ref : Acta Crystallographica Sect F Struct Biol Cryst Commun , 63 :294 , 2007
Abstract : Haloalkane dehalogenases are key enzymes for the degradation of halogenated aliphatic pollutants. The haloalkane dehalogenase DbjA constitutes a novel substrate-specificity class with high catalytic activity for beta-methylated haloalkanes. In order to reveal the mechanism of its substrate specificity, DbjA has been crystallized using the hanging-drop vapour-diffusion method. The best crystals were obtained using the microseeding technique with a reservoir solution consisting of 17-19.5%(w/v) PEG 4000, 0.2 M calcium acetate and 0.1 M Tris-HCl pH 7.7-8.0. The space group of the DbjA crystal is P2(1)2(1)2, with unit-cell parameters a = 212.9, b = 117.8, c = 55.8 A. The crystal diffracts to 1.75 A resolution.
ESTHER : Sato_2007_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_63_294
PubMedSearch : Sato_2007_Acta.Crystallogr.Sect.F.Struct.Biol.Cryst.Commun_63_294
PubMedID: 17401198

Title : Complete nucleotide sequence of an exogenously isolated plasmid, pLB1, involved in gamma-hexachlorocyclohexane degradation - Miyazaki_2006_Appl.Environ.Microbiol_72_6923
Author(s) : Miyazaki R , Sato Y , Ito M , Ohtsubo Y , Nagata Y , Tsuda M
Ref : Applied Environmental Microbiology , 72 :6923 , 2006
Abstract : The alpha-proteobacterial strain Sphingobium japonicum UT26 utilizes a highly chlorinated pesticide, gamma-hexachlorocyclohexane (gamma-HCH), as a sole source of carbon and energy, and haloalkane dehalogenase LinB catalyzes the second step of gamma-HCH degradation in UT26. Functional complementation of a linB mutant of UT26, UT26DB, was performed by the exogenous plasmid isolation technique using HCH-contaminated soil, leading to our successful identification of a plasmid, pLB1, carrying the linB gene. Complete sequencing analysis of pLB1, with a size of 65,998 bp, revealed that it carries (i) 50 totally annotated coding sequences, (ii) an IS6100 composite transposon containing two copies of linB, and (iii) potential genes for replication, maintenance, and conjugative transfer with low levels of similarity to other homologues. A minireplicon assay demonstrated that a 2-kb region containing the predicted repA gene and its upstream region of pLB1 functions as an autonomously replicating unit in UT26. Furthermore, pLB1 was conjugally transferred from UT26DB to other alpha-proteobacterial strains but not to any of the beta- or gamma-proteobacterial strains examined to date. These results suggest that this exogenously isolated novel plasmid contributes to the dissemination of at least some genes for gamma-HCH degradation in the natural environment. To the best of our knowledge, this is the first detailed report of a plasmid involved in gamma-HCH degradation.
ESTHER : Miyazaki_2006_Appl.Environ.Microbiol_72_6923
PubMedSearch : Miyazaki_2006_Appl.Environ.Microbiol_72_6923
PubMedID: 16963556
Gene_locus related to this paper: sphpi-linb

Title : Electrochemical enzyme immunoassay of a peptide hormone at picomolar levels - Matsuura_2005_Anal.Chem_77_4235
Author(s) : Matsuura H , Sato Y , Niwa O , Mizutani F
Ref : Analytical Chemistry , 77 :4235 , 2005
Abstract : A novel electrochemical enzyme immunoassay system with a 10 ng L(-1) level detection limit was developed for the determination of B-type natriuretic peptide (BNP), an important marker for the diagnosis of heart failure. Sample BNP was added to a solution containing a certain concentration of acetylcholinesterase(AChE)-labeled anti-BNP antibody to undergo an immunological reaction. After the immunological reaction, we proposed two assay schemes. One involves measuring the amount of antibody-enzyme conjugate that reacted with two BNP molecules (reacted conjugate). The other involves measuring the amount of antibody-enzyme conjugate with at least one free binding site (unreacted conjugate). Then the amount of reacted or unreacted conjugate was determined by measuring the AChE activity after the recovery of each conjugate from the immunological reaction mixture. To determine the trace level of the recovered antibody-enzyme conjugate, the AChE activity was determined with high sensitivity on the basis of the chemisorption/electrochemical desorption process of thiocholine, which was produced through the enzymatic reaction, on a silver surface. The thiocholine chemisorption (i.e., accumulation) on the silver electrode surface resulted in a sensitivity for the electrochemical determination of the AChE activity that was 2 orders of magnitude greater than that obtained when using direct measurement without accumulation. The procedure for determining the AChE activity of unreacted conjugate after its recovery on a BNP-modified disk was applied to the determination of BNP in serum samples. This procedure involves the removal of the immunological reaction mixture before the enzymatic reaction process, which allows the AChE activity to be measured without any interference from endogenous pseudocholinesterase, which exists with high activity in serum. With both procedures, the BNP could be measured within an hour. The detection limits were 20 and 40 ng L(-1) using the reacted and unreacted conjugate measuring procedures, respectively.
ESTHER : Matsuura_2005_Anal.Chem_77_4235
PubMedSearch : Matsuura_2005_Anal.Chem_77_4235
PubMedID: 15987132

Title : Two rhizobial strains, Mesorhizobium loti MAFF303099 and Bradyrhizobium japonicum USDA110, encode haloalkane dehalogenases with novel structures and substrate specificities - Sato_2005_Appl.Environ.Microbiol_71_4372
Author(s) : Sato Y , Monincova M , Chaloupkova R , Prokop Z , Ohtsubo Y , Minamisawa K , Tsuda M , Damborsky J , Nagata Y
Ref : Applied Environmental Microbiology , 71 :4372 , 2005
Abstract : Haloalkane dehalogenases are key enzymes for the degradation of halogenated aliphatic pollutants. Two rhizobial strains, Mesorhizobium loti MAFF303099 and Bradyrhizobium japonicum USDA110, have open reading frames (ORFs), mlr5434 and blr1087, respectively, that encode putative haloalkane dehalogenase homologues. The crude extracts of Escherichia coli strains expressing mlr5434 and blr1087 showed the ability to dehalogenate 18 halogenated compounds, indicating that these ORFs indeed encode haloalkane dehalogenases. Therefore, these ORFs were referred to as dmlA (dehalogenase from Mesorhizobium loti) and dbjA (dehalogenase from Bradyrhizobium japonicum), respectively. The principal component analysis of the substrate specificities of various haloalkane dehalogenases clearly showed that DbjA and DmlA constitute a novel substrate specificity class with extraordinarily high activity towards beta-methylated compounds. Comparison of the circular dichroism spectra of DbjA and other dehalogenases strongly suggested that DbjA contains more alpha-helices than the other dehalogenases. The dehalogenase activity of resting cells and Northern blot analyses both revealed that the dmlA and dbjA genes were expressed under normal culture conditions in MAFF303099 and USDA110 strain cells, respectively.
ESTHER : Sato_2005_Appl.Environ.Microbiol_71_4372
PubMedSearch : Sato_2005_Appl.Environ.Microbiol_71_4372
PubMedID: 16085827

Title : Regulation of human extravillous trophoblast function by membrane-bound peptidases - Fujiwara_2005_Biochim.Biophys.Acta_1751_26
Author(s) : Fujiwara H , Higuchi T , Sato Y , Nishioka Y , Zeng BX , Yoshioka S , Tatsumi K , Ueda M , Maeda M
Ref : Biochimica & Biophysica Acta , 1751 :26 , 2005
Abstract : During human placentation, the invasion of extravillous trophoblasts (EVTs) into maternal decidual tissues, especially toward maternal spiral arteries, is considered an essential process for subsequent normal fetal development. However, the precise regulatory mechanisms to induce EVT invasion toward arteries and/or to protect EVTs from further invasion have not been well understood. Recently, we found that two cell surface peptidases, dipeptidyl peptidase IV (DPPIV) and carboxypeptidase-M (CP-M,) are differentially expressed on EVTs. DPPIV expression was mainly observed on EVTs that had already ceased invasion. CP-M was detected on migrating EVTs including endovascular trophoblasts in the maternal arteries. The enzymatic inhibition of these peptidases affected the invasive property of choriocarcinoma-derived cell lines, BeWo and JEG3 cells. In addition, a chemokine, RANTES, that is one of the substrates for DPPIV, enhanced invasion of EVTs isolated from primary villous explant culture and its receptor, CCR1, was specifically expressed on migrating EVTs toward maternal arteries. Furthermore, a novel membrane-bound cell surface peptidase, named laeverin, was found to be specifically expressed on EVTs that had almost ceased invasion. These findings suggest that membrane-bound peptidases are important factors regulating EVT invasion during early placentation in humans.
ESTHER : Fujiwara_2005_Biochim.Biophys.Acta_1751_26
PubMedSearch : Fujiwara_2005_Biochim.Biophys.Acta_1751_26
PubMedID: 15897020

Title : Degradation of beta-Hexachlorocyclohexane by Haloalkane Dehalogenase LinB from Sphingomonas paucimobilis UT26 - Nagata_2005_Appl.Environ.Microbiol_71_2183
Author(s) : Nagata Y , Prokop Z , Sato Y , Jerabek P , Kumar A , Ohtsubo Y , Tsuda M , Damborsky J
Ref : Applied Environmental Microbiology , 71 :2183 , 2005
Abstract : Beta-Hexachlorocyclohexane (beta-HCH) is the most recalcitrant among the alpha-, beta-, gamma-, and delta-isomers of HCH and causes serious environmental pollution problems. We demonstrate here that the haloalkane dehalogenase LinB, reported earlier to mediate the second step in the degradation of gamma-HCH in Sphingomonas paucimobilis UT26, metabolizes beta-HCH to produce 2,3,4,5,6-pentachlorocyclohexanol.
ESTHER : Nagata_2005_Appl.Environ.Microbiol_71_2183
PubMedSearch : Nagata_2005_Appl.Environ.Microbiol_71_2183
PubMedID: 15812056

Title : Synaptic scaffolding molecule is involved in the synaptic clustering of neuroligin - Iida_2004_Mol.Cell.Neurosci_27_497
Author(s) : Iida J , Hirabayashi S , Sato Y , Hata Y
Ref : Molecular & Cellular Neurosciences , 27 :497 , 2004
Abstract : S-SCAM has a similar molecular organization to PSD-95. Both of them interact with a cell adhesion molecule, neuroligin. We previously reported that beta-catenin binds S-SCAM and recruits it to synapses. We have here examined using rat primary cultured neurons whether neuroligin recruits S-SCAM to synapses or S-SCAM determines the localization of neuroligin. Overexpressed neuroligin formed larger clusters under co-expression of S-SCAM but not of PSD-95. Overexpressed neuroligin blocked synaptic accumulation of PSD-95 but not of S-SCAM. S-SCAM mutant containing the neuroligin-binding region interfered with synaptic accumulation of neuroligin and PSD-95, whereas the similar mutant of PSD-95 had no effect. Biochemical studies revealed that neuroligin forms a ternary complex with S-SCAM and PSD-95 through manifold interactions. These findings imply that S-SCAM is tethered by beta-catenin to synapses and induces synaptic accumulation of neuroligin, which subsequently recruits PSD-95 to synapses.
ESTHER : Iida_2004_Mol.Cell.Neurosci_27_497
PubMedSearch : Iida_2004_Mol.Cell.Neurosci_27_497
PubMedID: 15555927

Title : What influences the results in critical patients after cardiovascular surgery? - Ishikawa_2004_Asian.Cardiovasc.Thorac.Ann_12_250
Author(s) : Ishikawa S , Koyano T , Takahashi T , Sato Y , Hasegawa Y , Ohki S , Oshima K , Oki S , Kunimoto F , Morishita Y
Ref : Asian Cardiovasc Thorac Ann , 12 :250 , 2004
Abstract : The predictive factors of surgical outcome were evaluated in compromised patients following cardiovascular surgery. Of 608 patients undergoing cardiovascular surgery between 1991 and 1999, 55 stayed in the intensive care unit for 2 weeks or longer. The mean age of these 55 patients was 56 years. There were 35 survivors and 20 nonsurvivors. Postoperative respiratory failure and gastrointestinal complications were significantly more frequent in those who died. The survival rate was significantly higher in patients who had enteral feeding compared to those who did not (88% versus 43%). Serum cholinesterase and total cholesterol concentrations were higher in the survivors. It was concluded that postoperative respiratory and gastrointestinal conditions influenced the surgical outcome, and serum cholinesterase and total cholesterol concentrations were valuable predictors of survival.
ESTHER : Ishikawa_2004_Asian.Cardiovasc.Thorac.Ann_12_250
PubMedSearch : Ishikawa_2004_Asian.Cardiovasc.Thorac.Ann_12_250
PubMedID: 15353466

Title : An in vitro wear study of posterior denture tooth materials on human enamel - Abe_2001_J.Oral.Rehabil_28_407
Author(s) : Abe Y , Sato Y , Taji T , Akagawa Y , Lambrechts P , Vanherle G
Ref : J Oral Rehabil , 28 :407 , 2001
Abstract : This in vitro study evaluated the wear effects of five posterior denture tooth materials on human enamel. The tooth specimen was cusp shaped and enamel specimen was formed as a 10 C 10 C 5 mm plate. All material-enamel combinations were tested using a machine designed to produce sliding contact 20 C 104 times at 60 cycles min-1 and a 4-mm sliding distance per stroke in the bucco-lingual direction under a load of 1 kg. Wear analysis was measured as the total height loss of each combination. In addition, the surface roughness (Ra) of each worn specimen was also evaluated. The least total height loss occurred with poly (methyl methacrylate) (PMMA) enamel pair, and the greatest did with porcelain (Po)-enamel pair. The lowest compound Ra value was measured in high-strength resin (HR)-enamel pair, and the highest in Po-enamel pair. These findings suggest that the best combination is PMMA-enamel, and the poorest combination is Po-enamel.
ESTHER : Abe_2001_J.Oral.Rehabil_28_407
PubMedSearch : Abe_2001_J.Oral.Rehabil_28_407
PubMedID: 11380779

Title : Interindividual variation in carboxylesterase levels in human liver microsomes - Hosokawa_1995_Drug.Metab.Dispos_23_1022
Author(s) : Hosokawa M , Endo T , Fujisawa M , Hara S , Iwata N , Sato Y , Satoh T
Ref : Drug Metabolism & Disposition: The Biological Fate of Chemicals , 23 :1022 , 1995
Abstract : Microsomal carboxylesterase activities in 12 human livers were determined using 10 kinds of carboxylesterase substrates (p-nitrophenylacetate, p-nitrophenylpropionate, p-nitrophenylbutyrate, butanilicaine, isocarboxazid, palmitoyl-coenzyme-A, malathion, clofibrate, acetanilide, and phenacetin). There were large individual differences in the 12 humans based on experimental results in the past several years in our laboratory. We found that all human liver microsomes have RH1-immunoreactive carboxylesterase, and the carboxylesterase content in liver also showed large individual differences. The RH1-immunoreactive carboxylesterase concentration correlated well with those of p-nitrophenylesters, clofibrate, butanilicaine, and isocarboxazid, and anti-RH1 immunoglobulin G strongly inhibited human liver hydrolase activity. These findings indicate that one major carboxylesterase isozyme that is immunoreactive with anti-RH1 in human liver microsomes has catalytic activity on major carboxylesterase substrates, and thus hydrolase activity in human liver depends on the expression level of this carboxylesterase isozyme. These observations should be useful in understanding the action of carboxylesterases on drug metabolism in humans.
ESTHER : Hosokawa_1995_Drug.Metab.Dispos_23_1022
PubMedSearch : Hosokawa_1995_Drug.Metab.Dispos_23_1022
PubMedID: 8654188

Title : Structure and expression of a gene coding for egg-specific protein in the silkworm, Bombyx mori. -
Author(s) : Sato Y , Yamashita O
Ref : Insect Biochem , 21 :495 , 1991
PubMedID:

Title : Cloning and expression in Escherichia coli of an esterase-coding gene from the oil-degrading bacterium Acinetobacter calcoaceticus RAG-1 - Reddy_1989_Gene_76_145
Author(s) : Reddy PG , Allon R , Mevarech M , Mendelovitz S , Sato Y , Gutnick DL
Ref : Gene , 76 :145 , 1989
Abstract : A putative esterase gene (est) from Acinetobacter calcoaceticus RAG-1 has been cloned into Escherichia coli. Esterase-positive clones exhibited high levels of esterase activity even in intact cells. In addition, expression of the est gene conferred on E. coli the ability to grow on simple triglycerides such as triacetin (TAC). The original esterase-positive plasmid pRA17 carried a 2.2-kb insert from a partial MboI digest of RAG-1 DNA, which gave a single band with RAG-1 DNA following Southern hybridization. By subcloning and sequencing the est gene was found to contain a sequence of 870 bp which could be translated to yield a protein of Mr 32,700. In support of the sequencing results was the finding that when pRA17 was expressed in minicells, a unique peptide of Mr 32,500 was identified. This peptide was not found in minicells transformed with esterase-negative plasmids, such as pRA176, which contained a Tn5 insertion in the est gene. The fact that the production of active esterase depended on the orientation of the est gene within the vector suggested that transcription proceeded from the tet promoter in pBR322.
ESTHER : Reddy_1989_Gene_76_145
PubMedSearch : Reddy_1989_Gene_76_145
PubMedID: 2545531
Gene_locus related to this paper: acica-este1 , acilw-rag1e