Abstract
Substrate specificities of proteases produced by two putrefactive marine bacteria, Shewanella putrefaciens and Alteromonas haloplanktis, were surveyed by using peptidyl-7-amino-4-methylcoumarin (MCA-substrates). Shewanella putrefaciens produced trypsin-like enzyme(s) showing broad spectrum specificity and chymotrypsin-like enzyme specifically hydrolysing Glt-Gly-Gly-Phe-MCA. Alteromonas haloplanktis produced high activity of ammopeptidase and trypsin-like enzyme(s) preferring Z-Phe-Arg-MCA, Bz-Arg-MCA and Boc-Leu-Ser-Thr-Arg-MCA. The two organisms would be able to utilize different proteins for their growth.
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