By a News Reporter-Staff News Editor at Biotech Week -- New research on Enzymes and Coenzymes is the subject of a report. According to news reporting originating in Yuncheng, People's Republic of China, by NewsRx journalists, research stated, "Halotolerant bacteria are excellent sources for selecting novel enzymes. Being intrinsically stable and active under high salinities, enzymes from these prokaryotes have evolved to function optimally under extreme conditions, making them robust biocatalysts with potential applications in harsh industrial processes."
The news reporters obtained a quote from the research from Yuncheng University, "A halotolerant strain LY19 showing lipolytic activity was isolated from saline soil of Yuncheng Salt Lake, China. It was identified as belonging to the genus of Salimicrobium by 16S rRNA gene sequence analysis. The extracellular enzyme was purified to homogeneity with molecular mass of 57 kDa by SDS-PAGE. Substrate specificity test revealed that the enzyme preferred short-chain p-nitrophenyl esters and exhibited maximum activity towards p-nitrophenyl butyrate (p-NPB), indicating an esterase activity. The esterase was highly active and stable over broad temperature (20°C-70°C), pH (7.0-10.0) and NaCl concentration (2.5%-25%) ranges, with an optimum at 50°C, pH 7.0 and 5% NaCl. Significant inhibition of the esterase was shown by ethylenediaminetetraacetic acid (EDTA), phenylmethylsulfonyl fluoride (PMSF) and phenylarsine oxide (PAO), which indicated that it was a metalloenzyme with serine and cysteine residues essential for enzyme activity. Moreover, the esterase displayed high activity and stability in the presence of hydrophobic organic solvents with log P(ow)???0.88 than in the absence of an organic solvent or in the presence of hydrophilic solvents. Results from the present study indicated the novel extracellular esterase from Salimicrobium sp. LY19 exhibited thermostable, alkali-stable, halotolerant and organic solvent-tolerant properties."
According to the news reporters, the research concluded: "These features led us to conclude that the esterase may have considerable potential for industrial applications in organic synthesis reactions."
For more information on this research see: Purification and characterization of an extracellular esterase with organic solvent tolerance from a halotolerant isolate, Salimicrobium sp. LY19. Bmc Biotechnology, 2013;13():108. (BioMed Central - www.biomedcentral.com/; Bmc Biotechnology - www.biomedcentral.com/bmcbiotechnol/)
Our news correspondents report that additional information may be obtained by contacting L. Xin, Life Science College, Yuncheng University, 333 Hedong East Street, Yuncheng 044000, People's Taiwan (see also Enzymes and Coenzymes).
Keywords for this news article include: Asia, Yuncheng, Enzymes and Coenzymes, People's Republic of China.
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