AUTOTROPHIC ENZYME SYSTEMS: I. ELECTRON TRANSPORT SYSTEMS CONCERNED WITH HYDROXYLAMINE OXIDATION IN NITROSOMONAS

Author:

Aleem M. I. H.1,Lees H.1

Affiliation:

1. Microbiology Department, University of Manitoba, Winnipeg, Canada

Abstract

Intact cells or cell-free extracts of Nitrosomonas catalyze the rapid and stoichiometric conversion of nitrohydroxylamine to nitrite at rates comparable to the oxidation of ammonium ion or hydroxylamine to nitrite. Cell-free extracts possess a powerful hydroxylamine – cytochrome c reductase activating hydroxylamine to donate electrons to the cytochrome systems comprising b, c, and a type components. The partially purified enzyme complex is sensitive to low concentrations of cyanide and inhibitors of the flavoproteins. The possible mechanism of the formation and oxidation of the new intermediate "nitrohydroxylamine" in the reaction sequence is discussed.

Publisher

Canadian Science Publishing

Subject

General Medicine

Cited by 7 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Biological Properties of Soils;Soils for Management of Organic Wastes and Waste Waters;2015-11-02

2. Production of nitric oxide in Nitrosomonas europaea by reduction of nitrite;Archives of Microbiology;1990-07

3. Proton Electrochemical Gradients in Washed Cells of Nitrosomonas europaea and Nitrobacter agilis;Journal of Bacteriology;1983-04

4. Energy coupling and respiration inNitrosomonas europaea;Archives of Microbiology;1976-11

5. The formation and utilization of reducing power in aerobic chemoautotrophic bacteria;Zeitschrift für allgemeine Mikrobiologie;1968

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