期刊
FEBS LETTERS
卷 585, 期 14, 页码 2177-2181出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2011.05.054
关键词
Desulfovibrio; Quinone reductase complex; Hydrogenase; Supercomplex; ACIII
资金
- Fundacao para a Ciencia e Tecnologia, Portugal [PTDC/BIA-PRO/68486/2006, PTDC/QUI-BIQ/100591/2008, SFRH/BD/30648/2006]
- Fundação para a Ciência e a Tecnologia [PTDC/BIA-PRO/68486/2006, PTDC/QUI-BIQ/100591/2008, SFRH/BD/30648/2006] Funding Source: FCT
The Quinone-reductase complex (Qrc) is a respiratory complex with Type I cytochrome c(3):menaquinone reductase activity, recently described in sulfate-reducing bacteria. Qrc is related to the complex iron-sulfur molybdoenzyme family and to the alternative complex III. In this work we report a detailed characterization of the redox properties of the metal cofactors of Qrc using EPR spectroscopy, which allowed the determination of the reduction potentials of five out of six hemes c, one [3Fe-4S](1+/0) center and the three [4Fe-4S](2+/1+) centers. In addition, we show that Qrc forms a supercomplex with [NiFe] hydrogenase and TpIc(3), its physiological electron donors. Structured summary of protein interactions: NiFe Hydrogenase physically interacts with Qrc by native page (View interaction). (C) 2011 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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