Open AccessCharacterization and expression of the co‐transcribed cyc1 and cyc2 genes encoding the cytochrome c 4 ( c 552 ) and a high‐molecular‐mass cytochrome c from Thiobacillus ferrooxidans ATCC 33020 1
Author(s) -
AppiaAyme Corinne,
Bengrine Abderrahmane,
Cavazza Christine,
GiudiciOrticoni MarieThérèse,
Bruschi Mireille,
Chippaux Marc,
Bonnefoy Violaine
Publication year - 1998
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1998.tb13224.x
Subject(s) - cytochrome , cytochrome c1 , coenzyme q – cytochrome c reductase , cytochrome c , respiratory chain , cytochrome b , cytochrome c oxidase , periplasmic space , biology , gene , cytochrome p450 reductase , biochemistry , microbiology and biotechnology , mitochondrion , enzyme , mitochondrial dna , escherichia coli
The sequence of the cyc1 gene encoding the Thiobacillus ferrooxidans ATCC 33020 c 552 cytochrome, shows that this cytochrome is a 21‐kDa periplasmic c 4 ‐type cytochrome containing two similar monohaem domains. The kinetics of reduction and the fact that cytochromes c 4 are considered to be physiological electron donors of cytochrome oxidases suggest that the last steps of the iron respiratory chain are: rusticyanin→cytochrome c 4 →cytochrome oxidase. In Thiobacillus ferrooxidans, cyc1 is co‐transcribed with the cyc2 gene, encoding a high‐molecular‐mass monohaem cytochrome c . This suggests that the cytochromes encoded by these genes belong to the same electron transfer chain.