Cytochrome aa3 from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius

S. Anemüller*, G. Schäfer

*Corresponding author for this work
38 Citations (Scopus)


Cytochrome aa3 serves as a terminal oxidase in the thermoacidophilic archaebacterium Sulfolobus acidocaldarius. A procedure for its isolation is described. The purified preparation consists of only one major polypeptide of 38 kDa apparent molecular mass. The enzyme contains two heme α molecules with midpoint potentials of + 220 and + 370 mV, respectively. The copper content is at least 2 Cu/aa3. It has only negligible capacity to oxidize cytochrome c, but rather serves as an oxidase for reduced caldariella quinone as present in the membrane of Sulfolobus.

Original languageEnglish
JournalFEBS Letters
Issue number2
Pages (from-to)451-455
Number of pages5
Publication statusPublished - 27.02.1989

Research Areas and Centers

  • Academic Focus: Center for Infection and Inflammation Research (ZIEL)


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