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Interaction of stigmatellin and DNP‐INT with the Rieske iron‐sulfur center of the chloroplast cytochrome b 6 ‐f complex
Author(s) -
Malkin Richard
Publication year - 1986
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(86)81041-9
Subject(s) - center (category theory) , chemistry , sulfur , int , cytochrome , cytochrome b , chloroplast , stereochemistry , crystallography , biochemistry , organic chemistry , computer science , enzyme , mitochondrial dna , gene , operating system
Stigmatellin and DNP‐INT are effective inhibitors of the catalytic activity of the plastoquinol‐plastocyanin oxidoreductase complex (cytochrome b 6 ‐f complex). Both inhibitors alter the EPR spectrum of the Rieske iron‐sulfur center but do not produce band‐shifts of cytochrome b ‐563. The midpoint redox potential of the Rieske center is unaffected by either inhibitor, although both alter the DBMIB‐induced g‐value shifts of the Rieske center. The results are considered in terms of binding domains for inhibitors in the cytochrome b 6 ‐f complex.