Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8299230 | Biochimica et Biophysica Acta (BBA) - Bioenergetics | 2008 | 19 Pages |
Abstract
The mechanism discussed is applicable to a monomeric bc1 complex. We discuss evidence in the literature that has been interpreted as shown that the dimeric structure participates in a more complicated mechanism involving electron transfer across the dimer interface. We show from myxothiazol titrations and mutational analysis of Tyr-199, which is at the interface between monomers, that no such inter-monomer electron transfer is detected at the level of the bL hemes. We show from analysis of strains with mutations at Asn-221 that there are coulombic interactions between the b-hemes in a monomer. The data can also be interpreted as showing similar coulombic interaction across the dimer interface, and we discuss mechanistic implications.
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Authors
Antony R. Crofts, J. Todd Holland, Doreen Victoria, Derrick R.J. Kolling, Sergei A. Dikanov, Ryan Gilbreth, Sangmoon Lhee, Richard Kuras, Mariana Guergova Kuras,