CYTOCHROME-OXIDASE EVOLVED BY TINKERING WITH DENITRIFICATION ENZYMES

被引：204
作者：
SARASTE, M
CASTRESANA, J
机构：
[1] European Molecular Biology Laboratory, D-69012 Heidelberg, Meyerhofstrasse 1
来源：
FEBS LETTERS | 1994年 / 341卷 / 01期
关键词：
CYTOCHROME OXIDASE; RESPIRATION; DENITRIFICATION; EVOLUTION OF METABOLISM;
D O I：
10.1016/0014-5793(94)80228-9
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The cytochrome bc complex which is encoded by the fixNOPQ operon in Bradyrhizobium japonicum, is the most distant member of the haem-copper cytochrome oxidase family. We have found that its major subunit, FixN, is homologous to the NorB subunit of nitric oxide reductase in a purple bacterium. A second evolutionary link between cytochrome oxidases and denitrification enzymes is the presence of a similar binuclear copper site in cytochrome aa(3) (the mitochondrial oxidase) and nitrous oxide reductase. This centre was probably acquired by a primitive FixN-type oxidase, leading to the evolution of the mitochondrial-type oxidase. These links suggest that the oxygen-reducing respiratory chain developed from the anaerobic, denitrifying respiratory system.
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页码：1 / 4
页数：4
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