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Appl. Environ. Microbiol., 01 1995, 180-186, Vol 61, No. 1
S Taguchi, A Odaka, Y Watanabe and H Momose
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.
Copyright © 1995, American Society for Microbiology
Molecular characterization of a gene encoding extracellular serine protease isolated from a subtilisin inhibitor-deficient mutant of Streptomyces albogriseolus S-3253
Department of Biological Science and Technology, Science University of Tokyo, Chiba, Japan.
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