title: Molecular analysis of a gene encoding a cell-bound esterase from Streptomyces chrysomallus.
abstract: A gene (estA) encoding a 42-kDa cell-bound esterase, EstA, was found to be located 75 bp upstream of the cyclophilin A gene (cypA) of Streptomyces chrysomallus. Western blot analysis revealed the presence of EstA (42 kDa) in cell extracts of S. chrysomallus X2 and Streptomyces lividans. EstA specifically hydrolyzes short-chain p-nitrophenyl esters. EstA formation starts at the end of growth phase, and its activity level remains constant throughout stationary phase. Expression of estA from the melanin (mel) promoter in plasmid pIJ702 led to a substantial increase of total esterase activity in streptomycetes.
authors.affiliation: Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Fachgebiet Biochemie und Molekulare Biologie, Technische Universit at Berlin, D-10587 Berlin, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Berger
authors.forename: M
authors.initials: M
authors.lastname: Hoffmann
authors.forename: U
authors.initials: U
authors.lastname: Keller
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D001483:Base Sequence; D002265:Carboxylic Ester Hydrolases / Q000235:genetics* / Q000378:metabolism; D017931:DNA Primers / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D018507:Gene Expression Regulation, Developmental; D015971:Gene Expression Regulation, Enzymologic; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D019696:Peptidylprolyl Isomerase / Q000235:genetics; D015183:Restriction Mapping; D017386:Sequence Homology, Amino Acid; D013302:Streptomyces / Q000201:enzymology* / Q000235:genetics* / Q000254:growth & development
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; D002265:Carboxylic Ester Hydrolases; C098953:EstA protein, bacteria; D019696:Peptidylprolyl Isomerase