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HiPIP oxido‐reductase activity in membranes from aerobically grown cells of the facultative phototroph Rhodoferax fermentans
Author(s) -
Hochkoeppler Alejandro,
Kofod Pauli,
Zani Davide
Publication year - 1995
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(95)01188-k
Subject(s) - phototroph , facultative , chemistry , membrane , biochemistry , biology , ecology , photosynthesis
The role of the periplasmically located, water‐soluble, HiPIP (high‐potential iron‐sulfur protein) in the respiratory chain of the facultative phototroph Rhodoferax fermentans has been examined. The oxidized HiPIP is reduced by succinate‐dependent respiration via the bc 1 complex, this reaction being inhibited by myxothiazol and/or stigmatellin. The reduced HiPIP can be oxidized by the membrane‐bound cytochrome oxidase, this reaction being inhibited by 0.1 mM cyanide. We conclude that aerobically grown Rf. fermentans contains a redox chain in which HiPIP mediates electron transfer between the bc 1 complex and the cb ‐type cytochrome oxidase.