Mitochondrial OXA translocase plays a major role in biogenesis of inner-membrane proteins

Abstract: The mitochondrial inner membrane harbors three protein translocases. Presequence translocase and carrier translocase are essential for importing nuclear-encoded proteins. The oxidase assembly (OXA) translocase is required for exporting mitochondrial-encoded proteins; however, different views exist about its relevance for nuclear-encoded proteins. We report that OXA plays a dual role in the biogenesis of nuclear-encoded mitochondrial proteins. First, a systematic analysis of OXA-deficient mitochondria led to an unexpected expansion of the spectrum of OXA substrates imported via the presequence pathway. Second, biogenesis of numerous metabolite carriers depends on OXA, although they are not imported by the presequence pathway. We show that OXA is crucial for the biogenesis of the Tim18-Sdh3 module of the carrier translocase. The export translocase OXA is thus required for the import of metabolite carriers by promoting assembly of the carrier translocase. We conclude that OXA is of central importance for the biogenesis of the mitochondrial inner membrane

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
Cell metabolism. - 23, 5 (2016) , 901-908, ISSN: 1550-4131

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2019
Urheber
Stiller, Sebastian
Höpker, Jan
Oeljeklaus, Silke
Schütze, Conny
Schrempp, Sandra
Vent-Schmidt, Jens
Horvath, Susanne E.
Frazier, Ann E.
Gebert, Natalia
Laan, Martin van der
Bohnert, Maria
Warscheid, Bettina
Pfanner, Nikolaus
Wiedemann, Nils

DOI
10.1016/j.cmet.2016.04.005
URN
urn:nbn:de:bsz:25-freidok-1318312
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
25.03.2025, 13:46 MEZ

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Beteiligte

Entstanden

  • 2019

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