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苜蓿根瘤菌对一些多元醇的代谢作用

Metabolism of some polyols by Rhizobium meliloti.

作者信息

Martinez De Drets G, Arias A

出版信息

J Bacteriol. 1970 Jul;103(1):97-103. doi: 10.1128/jb.103.1.97-103.1970.

Abstract

The utilization of d-mannitol, d-arabitol, and d-sorbitol by Rhizobium meliloti was studied in extracts from mannitol-grown cells. Two different polyol dehydrogenases were induced by any of these polyols: (i) a nicotinamide adenine dinucleotide (NAD)-arabitol dehydrogenase and (ii) a NAD-sorbitol dehydrogenase, whereas polyol phosphate dehydrogenases were absent. d-Arabitol dehydrogenase was observed to act on both d-arabitol and d-mannitol, but d-sorbitol dehydrogenase acted specifically on d-sorbitol. d-Arabitol was oxidized to d-xylulose, d-mannitol and d-sorbitol were oxidized to d-fructose. An adenosine triphosphate-linked hexokinase which acts on d-fructose and absence of hexose isomerase were also detected in this organism.

摘要

在以甘露醇培养的苜蓿根瘤菌细胞提取物中,研究了该菌对d-甘露醇、d-阿拉伯糖醇和d-山梨醇的利用情况。这些多元醇中的任何一种都能诱导产生两种不同的多元醇脱氢酶:(i)烟酰胺腺嘌呤二核苷酸(NAD)-阿拉伯糖醇脱氢酶和(ii)NAD-山梨醇脱氢酶,而不存在多元醇磷酸脱氢酶。观察到d-阿拉伯糖醇脱氢酶对d-阿拉伯糖醇和d-甘露醇都有作用,但d-山梨醇脱氢酶只对d-山梨醇有特异性作用。d-阿拉伯糖醇被氧化为d-木酮糖,d-甘露醇和d-山梨醇被氧化为d-果糖。在该生物体中还检测到一种作用于d-果糖的三磷酸腺苷连接的己糖激酶,且不存在己糖异构酶。

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