The anoxic plant mitochondrion as a nitrite: NO reductase

被引：134

作者：

Gupta, Kapuganti J. ^{[2
]}

Igamberdiev, Abir U. ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Biol, St John, NF A1B 3X9, Canada

[2] Univ Rostock, Dept Plant Physiol, D-10859 Rostock, Germany

来源：

MITOCHONDRION | 2011年 / 11卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Plant mitochondria; Anoxia; Nitrite reduction; Nitric oxide; Hemoglobin; CYTOCHROME-C-OXIDASE; ELECTRON-TRANSPORT; CYTOPLASMIC ACIDOSIS; ARABIDOPSIS-THALIANA; DIOXYGENASE FUNCTION; S-NITROSYLATION; IN-VITRO; OXYGEN; HEMOGLOBIN; NITRATE;

D O I：

10.1016/j.mito.2011.03.005

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

Under the conditions of oxygen deprivation, accumulating nitrite can be reduced in the mitochondrial electron transport chain forming free radical nitric oxide (NO). By reducing nitrite to NO, plant mitochondria preserve the capacity to oxidize external NADH and NADPH and retain a limited power for ATP synthesis complementing glycolytic ATP production. NO participates in O-2 balance in mitochondria by competitively inhibiting cytochrome c oxidase which can oxidize it to nitrite when oxygen concentration increases. Some of the NO escapes to the cytosol, where the efficient scavenging system involving non-symbiotic hemoglobin oxygenates NO to nitrate and supports continuous anaerobic turnover of nitrogen species. (C) 2011 Elsevier B.V. and Mitochondria Research Society. All rights reserved.

引用

页码：537 / 543

页数：7

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