Open AccessRespiratory chain composition and activity in some thermotolerant streptomycetes
Author(s) -
Edwards C.,
Ball A.S.
Publication year - 1987
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.1574-6968.1987.tb01983.x
Subject(s) - thermolabile , streptomyces , cytochrome , cytochrome c oxidase , thermostability , respiratory chain , oxidase test , biochemistry , cytochrome b , composition (language) , biology , chemistry , enzyme , bacteria , gene , genetics , linguistics , philosophy , mitochondrial dna
The cytochrome composition of membrane preparations from 3 thermotolerant species of Streptomyces was determined from difference spectra. All contained b , c and a ‐type haemoproteins and in addition, 2 species ( Streptomyces thermoviolaceus and Streptomyces thermoflavus ) possessed cytochrome oxidase d . A CO‐reacting b cytochrome similar to cytochrome oxidase o could also be detected in all 3 organisms. Thermotolerance of the respiratory chains showed no correlation with cytochrome composition. In general, Streptomyces thermonitrificans had the most thermostable activities, whilst those of S. thermoviolaceus were the most thermolabile. Growth temperature exerted no qualitative effects on respiratory chain composition but did affect the thermostability of some substrate‐supported oxidase activities.