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TitleInteraction of complexes I, III, and IV within the bovine respirasome by single particle cryoelectron tomography.
Journal, issue, pagesProc Natl Acad Sci U S A, Vol. 108, Issue 37, Page 15196-15200, Year 2011
Publish dateSep 13, 2011
AuthorsNatalya V Dudkina / Mikhail Kudryashev / Henning Stahlberg / Egbert J Boekema /
PubMed AbstractThe respirasome is a multisubunit supercomplex of the respiratory chain in mitochondria. Here we report the 3D reconstruction of the bovine heart respirasome, composed of dimeric complex III and ...The respirasome is a multisubunit supercomplex of the respiratory chain in mitochondria. Here we report the 3D reconstruction of the bovine heart respirasome, composed of dimeric complex III and single copies of complex I and IV, at about 2.2-nm resolution, determined by cryoelectron tomography and subvolume averaging. Fitting of X-ray structures of single complexes I, III(2), and IV with high fidelity allows interpretation of the model at the level of secondary structures and shows how the individual complexes interact within the respirasome. Surprisingly, the distance between cytochrome c binding sites of complexes III(2) and IV is about 10 nm. Modeling indicates a loose interaction between the three complexes and provides evidence that lipids are gluing them at the interfaces.
External linksProc Natl Acad Sci U S A / PubMed:21876144 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution22.0 Å
Structure data

EMDB-5319:
Three-dimensional structure of bovine respirasome by single particle cryo-electron tomography
Method: EM (subtomogram averaging) / Resolution: 22.0 Å

Source
  • Bos taurus (cattle)

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