ROUTE OF ETHANOL FORMATION IN ZYMOMONAS MOBILIS
ROUTE OF ETHANOL FORMATION IN ZYMOMONAS MOBILIS
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DOI：
10.1042/bj0980795
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发表时间：
1966-01-01
影响因子：
4.1
通讯作者：
LARGE, PJ
中科院分区：
文献类型：
--
作者：
DAWES, EA;RIBBONS, DW;LARGE, PJ
Enzymic evidence supporting the operation of the Entner-Doudoroff pathway in the anaerobic conversion of glucose into ethanol and carbon dioxide by Z. mobilis is presented. Cell extracts catalysed the formation of equimolar amounts of pyruvate and gly-ceraldehyde 3-phosphate from 6-phosphogluconate. Evidence that 3-deoxy-2-oxo-6-phosphogluconate is an intermediate in this conversion was obtained. Cell extracts of the organism contained the following enzymes glucose 6-phosphate dehydrogenase (active with nicotinamide adenine dinucleotide (NAD) and (NADP), ethanol dehydrogenase (active with NAD), glyceraldehyde 3-phosphate dehydrogenase (active with NAD), hexokinase, gluconokinase, glucose dehydrogenase and pyruvate decarboxylase. Extracts also catalyzed the overall conversion of glycerate 3-phosphate into pyruvate in the presence of adenosine dinucleotide (ADP). Gluconate dehydrogenase, fructose 1,6-diphosphate aldolase and NAD-NADP transhydrogenase were not detected. It is suggested that NAD is the physiological electron carrier in the balanced oxidation-reduction involved in ethanol formation.
