Zhu YJ

References (3)

Title : Lipase-Catalyzed Synthesis of Sucrose Monolaurate and Its Antibacterial Property and Mode of Action against Four Pathogenic Bacteria - Shao_2018_Molecules_23_
Author(s) : Shao SY , Shi YG , Wu Y , Bian LQ , Zhu YJ , Huang XY , Pan Y , Zeng LY , Zhang RR
Ref : Molecules , 23 : , 2018
Abstract : The aim of this work was to evaluate the antibacterial activities and mode of action of sucrose monolaurate (SML) with a desirable purity, synthesized by Lipozyme TL IM-mediated transesterification in the novel ionic liquid, against four pathogenic bacteria including L. monocytogenes, B. subtilis, S. aureus, and E. coli. The antibacterial activity was determined by minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and the time(-)kill assay. SML showed varying antibacterial activity against tested bacteria with MICs and MBCs of 2.5 and 20 mM for L. monocytogenes, 2.5 and 20 mM for B. subtilis, 10 and 40 mM for S. aureus, respectively. No dramatic inhibition was observed for E. coli at 80 mM SML. Mechanism of bacterial inactivation caused by SML was revealed through comprehensive factors including cell morphology, cellular lysis, membrane permeability, K(+) leakage, zeta potential, intracellular enzyme, and DNA assay. Results demonstrated that bacterial inactivation against Gram-positive bacteria was primarily induced by the pronounced damage to the cell membrane integrity. SML may interact with cytoplasmic membrane to disturb the regulation system of peptidoglycan hydrolase activities to degrade the peptidoglycan layer and form a hole in the layer. Then, the inside cytoplasmic membrane was blown out due to turgor pressure and the cytoplasmic materials inside leaked out. Leakage of intracellular enzyme to the supernatants implied that the cell membrane permeability was compromised. Consequently, the release of K(+) from the cytosol lead to the alterations of the zeta potential of cells, which would disturb the subcellular localization of some proteins, and thereby causing bacterial inactivation. Moreover, remarkable interaction with DNA was also observed. SML at sub-MIC inhibited biofilm formation by these bacteria.
ESTHER : Shao_2018_Molecules_23_
PubMedSearch : Shao_2018_Molecules_23_
PubMedID: 29738519

Title : Alkyl Ferulate Esters as Multifunctional Food Additives: Antibacterial Activity and Mode of Action against Escherichia coli in Vitro - Shi_2018_J.Agric.Food.Chem_66_12088
Author(s) : Shi YG , Zhu YJ , Shao SY , Zhang RR , Wu Y , Zhu CM , Liang XR , Cai WQ
Ref : Journal of Agricultural and Food Chemistry , 66 :12088 , 2018
Abstract : This work aims to prepare ferulic acid alkyl esters (FAEs) through the lipase-catalyzed reaction between methyl ferulate and various fatty alcohols in deep eutectic solvents and ascertain their antibacterial activities and mechanisms. Screens of antibacterial effects of FAEs against Escherichia coli ATCC 25922 ( E. coli) and Listeria monocytogenes ATCC 19115 ( L. monocytogenes) revealed that hexyl ferulate (FAC6) exerted excellent bacteriostatic and bactericidal effects on E. coli and L. monocytogenes (minimum inhibitory concentration (MIC): 1.6 and 0.1 mM, minimum bactericidal concentration (MBC): 25.6 and 0.2 mM, respectively). The antibacterial mechanism of FAC6 against E. coli was systematically studied to facilitate its practical use as a food additive with multifunctionalities. The growth and time-kill curves implied the partial cell lysis and inhibition of the growth of E. coli caused by FAC6. The result related to propidium iodide uptake and cell constituents' leakage (K(+), proteins, nucleotides, and beta-galactosidase) implied that bacterial cytomembranes were substantially compromised by FAC6. Variations on morphology and cardiolipin microdomains and membrane hyperpolarization of cells visually verified that FAC6 induced cell elongation and destructed the cell membrane with cell wall perforation. SDS-PAGE analysis and alterations of fluorescence spectra of bacterial membrane proteins manifested that FAC6 caused significant changes in constitutions and conformation of membrane proteins. Furthermore, it also could bind to minor grooves of E. coli DNA to form complexes. Meanwhile, FAC6 exhibited antibiofilm formation activity. These findings indicated that that FAC6 has promising potential to be developed as a multifunctional food additive.
ESTHER : Shi_2018_J.Agric.Food.Chem_66_12088
PubMedSearch : Shi_2018_J.Agric.Food.Chem_66_12088
PubMedID: 30360622

Title : Genome of the long-living sacred lotus (Nelumbo nucifera Gaertn.) - Ming_2013_Genome.Biol_14_R41
Author(s) : Ming R , VanBuren R , Liu Y , Yang M , Han Y , Li LT , Zhang Q , Kim MJ , Schatz MC , Campbell M , Li J , Bowers JE , Tang H , Lyons E , Ferguson AA , Narzisi G , Nelson DR , Blaby-Haas CE , Gschwend AR , Jiao Y , Der JP , Zeng F , Han J , Min XJ , Hudson KA , Singh R , Grennan AK , Karpowicz SJ , Watling JR , Ito K , Robinson SA , Hudson ME , Yu Q , Mockler TC , Carroll A , Zheng Y , Sunkar R , Jia R , Chen N , Arro J , Wai CM , Wafula E , Spence A , Xu L , Zhang J , Peery R , Haus MJ , Xiong W , Walsh JA , Wu J , Wang ML , Zhu YJ , Paull RE , Britt AB , Du C , Downie SR , Schuler MA , Michael TP , Long SP , Ort DR , Schopf JW , Gang DR , Jiang N , Yandell M , dePamphilis CW , Merchant SS , Paterson AH , Buchanan BB , Li S , Shen-Miller J
Ref : Genome Biol , 14 :R41 , 2013
Abstract : BACKGROUND: Sacred lotus is a basal eudicot with agricultural, medicinal, cultural and religious importance. It was domesticated in Asia about 7,000 years ago, and cultivated for its rhizomes and seeds as a food crop. It is particularly noted for its 1,300-year seed longevity and exceptional water repellency, known as the lotus effect. The latter property is due to the nanoscopic closely packed protuberances of its self-cleaning leaf surface, which have been adapted for the manufacture of a self-cleaning industrial paint, Lotusan. RESULTS: The genome of the China Antique variety of the sacred lotus was sequenced with Illumina and 454 technologies, at respective depths of 101x and 5.2x. The final assembly has a contig N50 of 38.8 kbp and a scaffold N50 of 3.4 Mbp, and covers 86.5% of the estimated 929 Mbp total genome size. The genome notably lacks the paleo-triplication observed in other eudicots, but reveals a lineage-specific duplication. The genome has evidence of slow evolution, with a 30% slower nucleotide mutation rate than observed in grape. Comparisons of the available sequenced genomes suggest a minimum gene set for vascular plants of 4,223 genes. Strikingly, the sacred lotus has 16 COG2132 multi-copper oxidase family proteins with root-specific expression; these are involved in root meristem phosphate starvation, reflecting adaptation to limited nutrient availability in an aquatic environment. CONCLUSIONS: The slow nucleotide substitution rate makes the sacred lotus a better resource than the current standard, grape, for reconstructing the pan-eudicot genome, and should therefore accelerate comparative analysis between eudicots and monocots.
ESTHER : Ming_2013_Genome.Biol_14_R41
PubMedSearch : Ming_2013_Genome.Biol_14_R41
PubMedID: 23663246
Gene_locus related to this paper: nelnu-a0a1u8aj84 , nelnu-a0a1u8bpe4 , nelnu-a0a1u7z9m9 , nelnu-a0a1u7ywy5 , nelnu-a0a1u8aik2 , nelnu-a0a1u7zmb5 , nelnu-a0a1u8a7m7 , nelnu-a0a1u8b0n9 , nelnu-a0a1u8b461 , nelnu-a0a1u7zzj3 , nelnu-a0a1u8ave7 , nelnu-a0a1u7yn26