Crystal structure of the dimeric mitofilin domain of Mic60 in complex with the CHCH domain of Mic19

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 

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Structural insights into crista junction formation by the Mic60-Mic19 complex.

Bock-Bierbaum, T.Funck, K.Wollweber, F.Lisicki, E.von der Malsburg, K.von der Malsburg, A.Laborenz, J.Noel, J.K.Hessenberger, M.Jungbluth, S.Bernert, C.Kunz, S.Riedel, D.Lilie, H.Jakobs, S.van der Laan, M.Daumke, O.

(2022) Sci Adv 8: eabo4946-eabo4946

  • DOI: https://doi.org/10.1126/sciadv.abo4946
  • Primary Citation of Related Structures:  
    7PUZ, 7PV0, 7PV1

  • PubMed Abstract: 

    Mitochondrial cristae membranes are the oxidative phosphorylation sites in cells. Crista junctions (CJs) form the highly curved neck regions of cristae and are thought to function as selective entry gates into the cristae space. Little is known about how CJs are generated and maintained. We show that the central coiled-coil (CC) domain of the mitochondrial contact site and cristae organizing system subunit Mic60 forms an elongated, bow tie-shaped tetrameric assembly. Mic19 promotes Mic60 tetramerization via a conserved interface between the Mic60 mitofilin and Mic19 CHCH (CC-helix-CC-helix) domains. Dimerization of mitofilin domains exposes a crescent-shaped membrane-binding site with convex curvature tailored to interact with the curved CJ neck. Our study suggests that the Mic60-Mic19 subcomplex traverses CJs as a molecular strut, thereby controlling CJ architecture and function.

  • Organizational Affiliation

    Clinic for Neurology, University Medical Center Göttingen, Göttingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MICOS complex subunit MIC60 fused to MIC19
A, B, C, D
149Thermochaetoides thermophila DSM 1495Mutation(s): 0 
Gene Names: CTHT_0073820CTHT_0012250
Find proteins for G0S140 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0S140 
Go to UniProtKB:  G0S140
Find proteins for G0SHY5 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SHY5 
Go to UniProtKB:  G0SHY5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsG0S140G0SHY5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.197α = 90
b = 85.371β = 101.72
c = 61.497γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research Council (ERC)GermanyERC-2013-CoG-616024
German Research Foundation (DFG)GermanyFOR2848/P06

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-07
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Data collection, Refinement description