Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
ISSN-L : 0918-6158
Purification and Characterization of α-L-Rhamnosidase from Bacteroides JY-6, a Human Intestinal Bacterium
Il-Sung JANGDong-Hyun KIM
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1996 Volume 19 Issue 12 Pages 1546-1549

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Abstract

An α-L-rhamnosidase (EC 3.2.1.40) was purified 1500-fold from Bacteroides JY-6, an intestinal anaerobic bacterium of human. The specific activity of purified enzyme was 89.9 μmol/min/mg protein. The enzyme (M.W.240000) is composed of two subunits of M.W. 120000 with pI and optimal pH values of 4.2 and 7.0, respectively.The apparent Kms for naringin, rutin and p-nitrophenyl-α-L-rhamnopyranoside were determined to be 0.89, 1.44 and 0.29 mM, respectively. The enzyme was strongly inhibited by L-rhamnose, L-fucose, saccharic acid 1, 4-lactone, p-chlormercuriphenylsulfonic acid and Pb2+.

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