Functional reassignment of Cellvibrio vulgaris EpiA to cellobiose 2-epimerase and an evaluation of the biochemical functions of the 4-O-β-d-mannosyl-d-glucose phosphorylase-like protein, UnkA
Functional reassignment of Cellvibrio vulgaris EpiA to cellobiose 2-epimerase and an evaluation of the biochemical functions of the 4-O-β-d-mannosyl-d-glucose phosphorylase-like protein, UnkA
FURTHER OBSERVATIONS ON THE LEAD TETRAACETATE OXIDATION OF REDUCING DISACCHARIDES
作者:A. J. Charlson、A. S. Perlin
DOI:10.1139/v56-157
日期:1956.9.1
readily by leadtetraacetateoxidation. Compounds examined include aldose and ketose disaccharides and aldobiuronic acids. Two types of reaction—one catalyzed by potassium acetate and the other non-catalyzed—are employed jointly to illustrate oxidation patterns which clearly differentiate each position of the biose linkage. Partial degradation of reducing disaccharides by leadtetraacetateoxidation is illustrated
Abstract Cell-wall polysaccharides of suspension-culturedcells of Nicotianatabacum were fractionated into EDTA-soluble, 5% and 24% potassium hydroxide-soluble, and α-cellulose components. From the 24% potassium hydroxide-soluble fraction, a polysaccharide composed of d -galactose, d -glucose, and d -mannose in approximately equal proportions was purified by ion-exchange chromatography and barium
The consecutive genes BF0771-BF0774 in the genome of Bacteroides fragilis NCTC 9343 were found to constitute an operon. The functional analysis of BF0772 showed that the gene encoded a novel enzyme, mannosylglucose phosphorylase that catalyzes the reaction, 4-O-beta-D-mannopyranosyl-D-glucose + Pi -> mannose-1-phosphate + glucose. Here we propose a new mannan catabolic pathway in the anaerobe, which involves 1,4-beta-mannanase (BF0771), a mannobiose and/or sugar transporter (BF0773), mannobiose 2-epimerase (BF0774), and mannosylglucose phosphorylase (BF0772), finally progressing to glycolysis. This pathway is distributed in microbes such as Bacteroides, Parabacteroides, Flavobacterium, and (C) 2011 Elsevier Inc. All rights reserved.
Acetoysis of the Glucomannan of Iles Mannan<sup>1</sup>
作者:F. Smith、H. C. Srivastava
DOI:10.1021/ja01588a038
日期:1956.4
134. The hemicelluloses of loblolly pine (Pinus taèda) wood. Part I. The isolation of five oligosaccharide fragments