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Physiologie und Biochemie der Streptomyceten IX. Hydrolyse von Cyclohexyl-, Kohlenhydrat- und Arylester durch eine Carboxylesterase aus Kulturen von Streptomyces hygroscopicus JA 6599

✍ Scribed by Prof. Dr. G. Reuter; R. Hüttner

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 207 KB
Volume: 17
Category: Article
ISSN: 0233-111X
DOI: 10.1002/jobm.19770170208

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✦ Synopsis

Abstract

Carboxylesterase in cell‐free extracts of Streptomyces hygroscopicus was characterized with cyclohexylacetate and β‐penta‐acetyl‐D‐glucose as substrates. After concentrating the enzyme, activity with α/β‐methyl‐4‐O‐propionyl‐L‐mycarosid as substrate was also observed. The influence of enzyme effectors was studied. Esterase activity was also found in the culture filtrate of. S. hygroscopicus.

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## Abstract Esterase in cell‐free extracts of __Streptomyces hygroscopicus__ JA 6599 has a temperature‐optimum of 35 °C, a pH‐optimum with __p__‐nitrophenylacetate as substrate at pH 7.7–8.1, with α‐naphthylacetate at pH 7–9. MICHAELIS constants in cell‐free extracts: with α‐naphthylacetate __K__~_