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An evidence based hypothesis on the existence of two pathways of mitochondrial crista formation

Harner, M. E., Unger, A-K., Geerts, W. J. C., Mari, M., Izawa, T., Stenger, M., Geimer, S., Reggiori, F., Westermann, B. & Neupert, W., 16-Nov-2016, In : eLife. 5, 25 p., 18853.

Research output: Contribution to journalArticleAcademicpeer-review

  • Max E. Harner
  • Ann-Katrin Unger
  • Willie J. C. Geerts
  • Muriel Mari
  • Toshiaki Izawa
  • Maria Stenger
  • Stefan Geimer
  • Fulvio Reggiori
  • Benedikt Westermann
  • Walter Neupert

Metabolic function and architecture of mitochondria are intimately linked. More than 60 years ago, cristae were discovered as characteristic elements of mitochondria that harbor the protein complexes of oxidative phosphorylation, but how cristae are formed, remained an open question. Here we present experimental results obtained with yeast that support a novel hypothesis on the existence of two molecular pathways that lead to the generation of lamellar and tubular cristae. Formation of lamellar cristae depends on the mitochondrial fusion machinery through a pathway that is required also for homeostasis of mitochondria and mitochondrial DNA. Tubular cristae are formed via invaginations of the inner boundary membrane by a pathway independent of the fusion machinery. Dimerization of the FiFo-ATP synthase and the presence of the MICOS complex are necessary for both pathways. The proposed hypothesis is suggested to apply also to higher eukaryotes, since the key components are conserved in structure and function throughout evolution.

Original languageEnglish
Article number18853
Number of pages25
JournaleLife
Volume5
Publication statusPublished - 16-Nov-2016

    Keywords

  • DYNAMIN-RELATED GTPASE, YEAST F1FO-ATP SYNTHASE, INNER-MEMBRANE-FUSION, ELECTRON TOMOGRAPHY, OUTER-MEMBRANE, ATP SYNTHASE, SACCHAROMYCES-CEREVISIAE, MICROSCOPY REVEALS, PROTEIN, FISSION

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