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内源性还原型烟酰胺腺嘌呤二核苷酸对大肠杆菌膜囊泡转运的刺激作用。

Stimulation of transport into Escherichia coli membrane vesicles by internally generated reduced nictotinamide adenine dinucleotide.

作者信息

Futai M

出版信息

J Bacteriol. 1974 Nov;120(2):861-5. doi: 10.1128/jb.120.2.861-865.1974.

Abstract

Membrane vesicles containing internal alcohol dehydrogenase and nicotinamide adenine dinucleotide (NAD) were prepared from Escherichia coli ML308-225. Upon the addition of ethanol, these vesicles respired and transported several amino acids. Transport rates driven by internally generated reduced NAD (NADH) were about 60 to 80% of that stimulated by d-lactate. This transport was inhibited by cyanide and anaerobiosis. Ferricyanide, a nonpermeable electron acceptor, inhibited transport stimulated by external NADH, but not that stimulated by internally generated NADH.

摘要

从大肠杆菌ML308 - 225制备了含有内部乙醇脱氢酶和烟酰胺腺嘌呤二核苷酸(NAD)的膜囊泡。加入乙醇后,这些膜囊泡进行呼吸并转运几种氨基酸。由内部产生的还原型NAD(NADH)驱动的转运速率约为d - 乳酸刺激的转运速率的60%至80%。这种转运受到氰化物和厌氧环境的抑制。铁氰化物是一种不可渗透的电子受体,它抑制由外部NADH刺激的转运,但不抑制由内部产生的NADH刺激的转运。

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