The monoheme cytochrome c subunit of Alternative Complex III is a direct electron donor to caa3 oxygen reductase in Rhodothermus marinus

Patrícia N. Refojo, Filipa Calisto, Miguel A. Ribeiro, Miguel Teixeira, Manuela M. Pereira

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Alternative Complex III (ACIII) is an example of the robustness and flexibility of prokaryotic respiratory chains. It performs quinol:cytochrome c oxidoreductase activity, being functionally equivalent to the bc1 complex but structurally unrelated. In this work we further explored ACIII investigating the role of its monoheme cytochrome c subunit (ActE). We expressed and characterized the individually isolated ActE, which allowed us to suggest that ActE is a lipoprotein and to show its function as a direct electron donor to the caa3 oxygen reductase.

Original languageEnglish
Pages (from-to)1037-1044
Number of pages8
JournalBiological Chemistry
Volume398
Issue number9
DOIs
Publication statusPublished - 28 Aug 2017

Keywords

  • bc complex
  • cytochrome c oxidase
  • lipoprotein
  • quinone
  • respiratory chain

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