Abstract
The proton-translocating NADH: ubiquinone oxidoreductase (complex I) is a large, multi-subunit and multi-redox centre enzyme which is found in the mitochondrial inner membrane and plasma membrane of some bacteria. In this minireview an attempt has been made to critically discuss selected topics in the structure and function of this enzyme. A special emphasis is given to the iron-sulphur cluster and to the proteins that may bind them. Previous suggestions for the mechanism of proton-translocation by complex I are discussed. Subcomplexes that contain several but not all of the subunits of the intact mitochrondrial enzyme are described and analysed in order to identify the functional core of the enzyme. The data on the trans-membrane organisation of several subunits is examined. It is hoped that most of the suggestions as well as the questions raised here could be experimentally tested in the near future.
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Finel, M. The proton-translocating NADH: Ubiquinone oxidoreductase: A discussion of selected topics. J Bioenerg Biomembr 25, 357–366 (1993). https://doi.org/10.1007/BF00762461
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DOI: https://doi.org/10.1007/BF00762461