Restoration by ubiquinone of Azotobacter vinelandii reduced nicotinamide adenine dinucleotide oxidase activity.
نویسندگان
چکیده
Extraction with pentane virtually abolished reduced nicotinamide adenine dinucleotide oxidase activity in small particles from Azotobacter vinelandii, but activity was largely restored by added ubiquinone.
منابع مشابه
Oxidation of D(minus) lactate by the electron transport fraction of Azotobacter vinelandii.
d(-) Lactate oxidation in Azobacter vinelandii strain O is readily carried out by the membrane bound enzyme that concentrates in the electron transport fraction (R(3)). This oxidation in the R(3) fraction is not dependent on externally added nicotinamide adenine dinucleotide, flavine adenine dinucleotide, or flavine mononucleotide. Phenazine methosulfate, O(2), and menadione all served as good ...
متن کاملL-malate oxidation by the electron transport fraction of Azotobacter vinelandii.
The membrane-bound l-malate oxidoreductase of Azotobacter vinelandii strain O was found to be a flavoprotein-dependent enzyme associated with the electron transport system (R(3)) of this organism. The particulate R(3) fraction, which possessed the l-malate oxidoreductase, carried out the cyanide-sensitive oxidation of l-malate, d-lactate, reduced nicotinamide adenine dinucleotide and nicotinami...
متن کاملNicotinamide adenine dinucleotide biosynthesis and pyridine nucleotide cycle metabolism in microbial systems.
INTRODUCTION ...... ......... .......... .................. 83 BIOSYNTHESIS OF NICOTINAMIDE ADENINE DINUCLEOTIDE 83 Anaerobic De Novo Pathways .. ...... .... .... ... 84 Dihydroxyacetone phosphate-aspartate pathway 84 Formate-aspartate pathway .............................................. 87 Aerobic Tryptophan Catabolic Pathway 87 Genetics of Anaerobic Nicotinamide Adenine Dinucleotide Biosynt...
متن کاملThe electron transport system in nitrogen fixation by Azotobacter. II. Isolation and function of a new type of ferredoxin.
A new type of ferredoxin was isolated from Azotobacter vinelandii cells. The protein was able to replace the native chloroplast ferredoxin in the photoreduction of nicotinamide adenine dinucleotide phosphate (NADP) and functioned as a reductant for the Azotobacter nitrogenase.
متن کاملThe Electron Transport System of Hydrogenomonas eutropha
Wosilait and Nason (1) demonstrated that quinones could serve as electron acceptors for the enzymatic oxidation of reduced pyridine nucleotides, and their survey of plant, animal, and microorganism extracts (2) revealed the general occurrence of reduced pyridine nucleotide-quinone reductase activity. This finding and Dam’s (3) earlier report, which indicated that vitamin K was a common constitu...
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ورودعنوان ژورنال:
- Journal of bacteriology
دوره 98 1 شماره
صفحات -
تاریخ انتشار 1969