Circular dichroic evidence for a conformational change in a cytochrome b--c1 complex by uncoupling agents. | Zendy

J. Reed | Zendy; Thomas A. Reed | Zendy; B. Hess | Zendy

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Circular dichroic evidence for a conformational change in a cytochrome b--c1 complex by uncoupling agents.

Author(s) -

J. Reed,

Thomas A. Reed,

B. Hess

Publication year - 1979

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.76.3.1045

Subject(s) - dichroic glass , cytochrome , heme , cytochrome b , crystallography , chemistry , cytochrome c , cytochrome c1 , stereochemistry , conformational change , photochemistry , coenzyme q – cytochrome c reductase , biochemistry , materials science , mitochondrion , nanotechnology , enzyme , mitochondrial dna , gene

Circular dichroic spectra of the cytochrome b--c1 complex exhibit bilobe formation typical of exciton splitting in the presence of uncoupler. Bilobe formation occurs if both cytochrome c1 and cytochrome b are fully reduced. The fully oxidized and ascorbate-reduced complexes are not altered dichroically by uncouplers. The exciton splitting induced by uncoupler is consistent with heme--heme interaction: specifically, interaction between the two cytochromes b in the complex.

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