Jia P

References (6)

Title : Structural and mechanistic insights into enantioselectivity toward near-symmetric esters of a novel carboxylesterase RoCE - Dou_2022_Catal.Sci.Technol_12_7448
Author(s) : Dou Z , Jia P , Chen X , Wu Z , Xu G , Ni Y
Ref : Catal Sci Technol , 12 :7448 , 2022
Abstract : A novel carboxylesterase designated as RoCE was identified from Rhodococcus opacus with high activity and enantioselectivity toward asymmetric esters such as ethyl 2,2-dimethylcyclopropane-1-carboxylate (DMCPE). Moreover, RoCE could catalyze the enantioselective resolution of near-symmetric oxyheterocyclic esters such as ethyl tetrahydro-2H-pyran-2-carboxylate (THPCE), which are generally regarded as 'hard-to-be-discriminated' by chemical and biological catalysts. The crystal structure of RoCE was resolved at a resolution of 1.78 A. Theozyme calculation, MD simulations and pre-reaction state analysis were performed to clarify the molecular basis for the enantioselectivity toward oxyheterocyclic carboxylic acid esters with a nearly symmetric structure. F166 plays an important role in manipulating the enantioselective recognition of (S)- and (R)-DMCPE through steric effect. The intrinsic symmetric structure of (S)- and (R)-THPCE is mainly responsible for the relatively lower enantioselectivity than DMCPE. By introducing hydrogen bond interactions, a mutant M144T was successfully obtained with an E value of 2.44-fold that of WT. MD simulations further prove the increased enantioselectivity of M144T in terms of pre-reaction state and binding free energy. This study provides a novel carboxylesterase and important molecular insights into the enantioselectivity of carboxylesterase toward heterocyclic carboxylic acid esters with a nearly symmetric structure, which will facilitate further engineering of the enantioselectivity of carboxylesterase.
ESTHER : Dou_2022_Catal.Sci.Technol_12_7448
PubMedSearch : Dou_2022_Catal.Sci.Technol_12_7448
PubMedID:
Gene_locus related to this paper: rhoop-RoCE

Title : Expression and characterisation of feruloyl esterases from Lactobacillus fermentum JN248 and release of ferulic acid from wheat bran - Deng_2019_Int.J.Biol.Macromol_138_272
Author(s) : Deng H , Jia P , Jiang J , Bai Y , Fan TP , Zheng X , Cai Y
Ref : Int J Biol Macromol , 138 :272 , 2019
Abstract : Genes encoding six feruloyl esterases (FAEs; lbff0997, lbff0272, lbff1432, lbff1695, lbff1849, lbff0153) from Lactobacillus fermentum JN248 were cloned, overexpressed and characterised. Maximum enzyme activity was observed at 35 degrees C for recombinant FAEs LFFae0997, LFFae0272 and LFFae0153, at 30 degrees C for LFFae1695, and at 40 degrees C for LFFae1432and LFFae1849. For five of the enzymes, optimal activity was observed at pH7.0 or pH8.0, and high thermostability was measured up to 55 degrees C. By contrast, LFFae1432 lost less than 10.0% activity after incubation at 40 degrees C for 2h, and pH stability was highest between pH7.0 and pH9.0. In addition, LFFae1432 was the most robust esterase, with a higher affinity and hydrolytic activity against synthetic esters. The enzymes released ferulic acids (FAs) from de-starched wheat bran (DSWB), and 60.7% of the total alkali-extractable FAs were released when LFFae1432 was added alone, compared with less than 10% for the other enzymes. The amount of FAs released by FAEs increased when combined with xylanase. These FAEs could serve as promising biocatalysts for biodegradation, and LFFae1432 may hold promise for potential industrial applications.
ESTHER : Deng_2019_Int.J.Biol.Macromol_138_272
PubMedSearch : Deng_2019_Int.J.Biol.Macromol_138_272
PubMedID: 31306699

Title : An organophosphorus hapten used in the preparation of monoclonal antibody and as an active immunization vaccine in the detoxication of soman poisoning - Jia_2009_Toxicol.Lett_187_45
Author(s) : Jia P , Wang Y , Yu M , Wu J , Yang R , Zhao Y , Zhou L
Ref : Toxicol Lett , 187 :45 , 2009
Abstract : Soman is an organophosphorus neurotoxin which inhibits the activity of acetylcholinesterase (AChE). The goal of this work was to find out whether antibodies against an organophosphorus hapten could protect mice from soman toxicity. An organophosphorus hapten P6 was synthesized. Its chemical conjugates with limulus polyphemus hemocyanin and bovine serum albumin were used as immune antigen (P6-LPH) and detection antigen (P6-BSA), respectively. Eight hybridoma cell lines secreting monoclonal antibodies (Mabs) were established. The binding reactivities of Mabs with P6 and soman were determined by competitive inhibition enzyme immunoassay (CIEIA). All antibodies recognized P6 and four of them (2C10, 3G1, 3B9 and 3C11) combined with soman. The IC(50) was 10(-6.5) to 10(-5.3)mol/l for P6 and 10(-5) to 10(-3.5)mol/l for soman. Furthermore, Mab 3G1 reduced the inhibition of AChE activity by soman in vitro. When soman was pre-incubated with Mabs before being injected into mice, soman potency was reduced, indicating that Mabs could protect mice from soman toxicity. In an active immunization regimen, mice immunized with P6-LPH and challenged with 0.15mg/kg soman injected subcutaneously, had fewer signs of intoxication and a higher survival rate compared with control mice. These results demonstrate that the anti-soman antibodies have proper characteristics as scavengers in the detoxication of soman poisoning.
ESTHER : Jia_2009_Toxicol.Lett_187_45
PubMedSearch : Jia_2009_Toxicol.Lett_187_45
PubMedID: 19429243

Title : Design, synthesis and evaluation of galanthamine derivatives as acetylcholinesterase inhibitors - Jia_2009_Eur.J.Med.Chem_44_772
Author(s) : Jia P , Sheng R , Zhang J , Fang L , He Q , Yang B , Hu Y
Ref : Eur Journal of Medicinal Chemistry , 44 :772 , 2009
Abstract : A new series of galanthamine derivatives have been designed, synthesized and evaluated as acetylcholinesterase inhibitors. All of the new compounds prepared showed high AChE inhibitory activities, with compound 3e that has an N-hexyl-benzyl piperidine substituent on the nitrogen atom reaching the best inhibitory activity for AChE (IC(50)=5.62 nM). The docking study performed with AutoDock demonstrated that 3e was nicely accommodated by AChE.
ESTHER : Jia_2009_Eur.J.Med.Chem_44_772
PubMedSearch : Jia_2009_Eur.J.Med.Chem_44_772
PubMedID: 18550228

Title : Genome sequencing and comparative analysis of Saccharomyces cerevisiae strain YJM789 - Wei_2007_Proc.Natl.Acad.Sci.U.S.A_104_12825
Author(s) : Wei W , McCusker JH , Hyman RW , Jones T , Ning Y , Cao Z , Gu Z , Bruno D , Miranda M , Nguyen M , Wilhelmy J , Komp C , Tamse R , Wang X , Jia P , Luedi P , Oefner PJ , David L , Dietrich FS , Li Y , Davis RW , Steinmetz LM
Ref : Proc Natl Acad Sci U S A , 104 :12825 , 2007
Abstract : We sequenced the genome of Saccharomyces cerevisiae strain YJM789, which was derived from a yeast isolated from the lung of an AIDS patient with pneumonia. The strain is used for studies of fungal infections and quantitative genetics because of its extensive phenotypic differences to the laboratory reference strain, including growth at high temperature and deadly virulence in mouse models. Here we show that the approximately 12-Mb genome of YJM789 contains approximately 60,000 SNPs and approximately 6,000 indels with respect to the reference S288c genome, leading to protein polymorphisms with a few known cases of phenotypic changes. Several ORFs are found to be unique to YJM789, some of which might have been acquired through horizontal transfer. Localized regions of high polymorphism density are scattered over the genome, in some cases spanning multiple ORFs and in others concentrated within single genes. The sequence of YJM789 contains clues to pathogenicity and spurs the development of more powerful approaches to dissecting the genetic basis of complex hereditary traits.
ESTHER : Wei_2007_Proc.Natl.Acad.Sci.U.S.A_104_12825
PubMedSearch : Wei_2007_Proc.Natl.Acad.Sci.U.S.A_104_12825
PubMedID: 17652520
Gene_locus related to this paper: yeast-AIM2 , yeast-BST1 , yeast-cbpy1 , yeast-cld1 , yeast-ATG15 , yeast-dap1 , yeast-dap2 , yeast-dlhh , yeast-ECM18 , yeast-FSH1 , yeast-FSH3 , yeast-ict1 , yeast-kex01 , yeast-LDH1 , yeast-MCFS1 , yeast-MCFS2 , yeast-met2 , yeast-mgll , yeast-pdat , yeast-ppme1 , yeast-ROG1 , yeast-SAY1 , yeast-tgl1 , yeast-tgl2 , yeast-yby9 , yeast-YDL109C , yeast-YDR428C , yeast-YDR444W , yeast-yfd4 , yeast-yg19 , yeast-yj77 , yeast-yjg8 , yeast-YLL012W , yeast-YLR020C , yeast-YLR118c , yeast-ym60 , yeast-ynl5 , yeast-yo059 , yeast-YPR147C , yeast-hda1

Title : Sequence and analysis of rice chromosome 4 - Feng_2002_Nature_420_316
Author(s) : Feng Q , Zhang Y , Hao P , Wang S , Fu G , Huang Y , Li Y , Zhu J , Liu Y , Hu X , Jia P , Zhao Q , Ying K , Yu S , Tang Y , Weng Q , Zhang L , Lu Y , Mu J , Zhang LS , Yu Z , Fan D , Liu X , Lu T , Li C , Wu Y , Sun T , Lei H , Li T , Hu H , Guan J , Wu M , Zhang R , Zhou B , Chen Z , Chen L , Jin Z , Wang R , Yin H , Cai Z , Ren S , Lv G , Gu W , Zhu G , Tu Y , Jia J , Chen J , Kang H , Chen X , Shao C , Sun Y , Hu Q , Zhang X , Zhang W , Wang L , Ding C , Sheng H , Gu J , Chen S , Ni L , Zhu F , Chen W , Lan L , Lai Y , Cheng Z , Gu M , Jiang J , Li J , Hong G , Xue Y , Han B
Ref : Nature , 420 :316 , 2002
Abstract : Rice is the principal food for over half of the population of the world. With its genome size of 430 megabase pairs (Mb), the cultivated rice species Oryza sativa is a model plant for genome research. Here we report the sequence analysis of chromosome 4 of O. sativa, one of the first two rice chromosomes to be sequenced completely. The finished sequence spans 34.6 Mb and represents 97.3% of the chromosome. In addition, we report the longest known sequence for a plant centromere, a completely sequenced contig of 1.16 Mb corresponding to the centromeric region of chromosome 4. We predict 4,658 protein coding genes and 70 transfer RNA genes. A total of 1,681 predicted genes match available unique rice expressed sequence tags. Transposable elements have a pronounced bias towards the euchromatic regions, indicating a close correlation of their distributions to genes along the chromosome. Comparative genome analysis between cultivated rice subspecies shows that there is an overall syntenic relationship between the chromosomes and divergence at the level of single-nucleotide polymorphisms and insertions and deletions. By contrast, there is little conservation in gene order between rice and Arabidopsis.
ESTHER : Feng_2002_Nature_420_316
PubMedSearch : Feng_2002_Nature_420_316
PubMedID: 12447439
Gene_locus related to this paper: orysa-Q7XTC5 , orysa-Q7F959 , orysa-q7f9i3 , orysa-q7x7y5 , orysa-q7xkj9 , orysa-q7xr62 , orysa-q7xr63 , orysa-q7xr64 , orysa-q7xsg1 , orysa-q7xsq2 , orysa-Q7XTM8 , orysa-q7xts6 , orysa-q7xue7 , orysa-q7xv53 , orysa-Q7XVB5 , orysa-Q7XVG5 , orysj-q0jaf0 , orysj-q7f8x1