The respiratory system of Sulfolobus acidocaldarius, a thermoacidophilic archaebacterium

FEBS Letters

Anemüller, S.¹  Schäfer, G.¹  Lübben, M.¹ 

[1] Institut für Biochemie, Medizinische Universität zu Lübeck, Ratzebwger Allee 160, D-2400 Lübeck, FRG

关键词: Archaebacterium;    Thermoacidophile;    Electron transport;    Oxidative phosphorylation;    HOQNO;    2-heptyl-4-hydroxy-quinoline N-oxide;    DTNB;    5;    5'-dithiobis-(2-nitrobenzoic acid);    BAL;    British Anti-Lewisite (2;    3-dimercaptopropanol);    EEDQ;    N-ethoxycarbonyl-2-ethoxy-1;    2-dihydroxyquinoline;    FCCP;    carbonyl cyanide p-trifluoro-methoxyphenylhydrazone;    2;    4-DNP;    2;    4-dinitrophenol;   

DOI  :  10.1016/0014-5793(85)80084-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The respiratory properties, cellular ATP content and absorption difference spectra of Sulfolobus acidocaldarius (DSM 639) have been investigated. In contrast to earlier postulates regarding Thermoplasma acidophilum [(1984) Syst. Appl. Microbiol. 5, 30-40], S. acidocaldarius seemed to depend energetically on respiration-coupled phosphorylation. Its ATP content strictly depended on respiratory activity. Its membrane is capable of proton pumping and presumably contains a branched electron transport system. The latter is composed of at least 2 types of cytochromes, an a+- and presumably an o-type, while c-type cytochromes could not be detected. It appears possible that one of the terminal oxidases is directly reduced by the socalled caldariellaquinone, found in the same organism [(1983) Syst. Appl. Microbiol. 4, 295-304].

【 授权许可】

Unknown