| Literature DB >> 17554575 |
Sameh H Soror1, V Verma, Ren Rao, Shafaq Rasool, S Koul, G N Qazi, John Cullum.
Abstract
The genome sequence of Streptomyces coelicolor A3(2) contains 51 putative lipase and esterase genes mostly of unknown function. The gene estB (locus SCO 6966) was expressed as a His-tagged protein in E. coli. Esterase B was active at low temperatures exerting its maximum activity at 30 degrees C and retaining more than 25% of its activity at 4 degrees C. The optimum pH was 8-8.5. The enzyme was active against short synthetic p-nitrophenylesters (C2-C10) with maximum activity towards the acetate ester (C2). The esterase was tested on 13 series of racemic esters of potential interest for the synthesis of chiral pharmaceutical compounds. 4 of the series were substrates and a modest degree of enantioselectivity was observed (enantiomeric ratios of 1.1-1.9).Entities:
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Year: 2007 PMID: 17554575 DOI: 10.1007/s10295-007-0224-6
Source DB: PubMed Journal: J Ind Microbiol Biotechnol ISSN: 1367-5435 Impact factor: 4.258