title: Molecular characterization of a gene encoding extracellular serine protease isolated from a subtilisin inhibitor-deficient mutant of Streptomyces albogriseolus S-3253.
abstract: An extracellular serine protease produced by a mutant, M1, derived from Streptomyces albogriseolus S-3253 that no longer produces a protease inhibitor (Streptomyces subtilisin inhibitor [SSI]) was isolated. A 20-kDa protein was purified by its affinity for SSI and designated SAM-P20. The amino acid sequence of the amino-terminal region of SAM-P20 revealed high homology with the sequences of Streptomyces griseus proteases A and B, and the gene sequence confirmed the relationships. The sequence also revealed a putative amino acid signal sequence for SAM-P20 that apparently functioned to allow secretion of SAM-P20 from Escherichia coli carrying the recombinant gene. SAM-P20 produced by E. coli cells was shown to be sensitive to SSI inhibition.
authors.affiliation: Department of Biological Science and Technology, Science University of Tokyo, Chiba, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Taguchi
authors.forename: A
authors.initials: A
authors.lastname: Odaka
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Momose
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D001483:Base Sequence; D003001:Cloning, Molecular; D017931:DNA Primers; D015971:Gene Expression Regulation, Enzymologic; D008969:Molecular Sequence Data; D009154:Mutation; D015183:Restriction Mapping; D016415:Sequence Alignment; D012697:Serine Endopeptidases / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*; D013302:Streptomyces / Q000201:enzymology* / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; C018150:subtilisin inhibitor protein, Streptomyces; D012697:Serine Endopeptidases