7PUZ

Crystal structure of the Mic60 coiled coil domain

• PDB DOI: https://doi.org/10.2210/pdb7PUZ/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Lachancea thermotolerans CBS 6340
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2021-10-01 Released: 2022-09-07 
• Deposition Author(s): Bock-Bierbaum, T., Funck, K., Daumke, O.
• Funding Organization(s): European Research Council (ERC), German Research Foundation (DFG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.84 Å
• R-Value Free: 0.290 
• R-Value Work: 0.244 
• R-Value Observed: 0.247 

Literature

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

• PubMed: 36044574 
• 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.

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Organizational Affiliation: 

Structural Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: light scattering

Macromolecule Content

• Total Structure Weight: 20.02 kDa 
• Atom Count: 1,127 
• Modelled Residue Count: 148 
• Deposited Residue Count: 179 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MICOS complex subunit MIC60	A	179	Lachancea thermotolerans CBS 6340	Mutation(s): 0  Gene Names: MIC60, KLTH0H09724g
UniProt
Find proteins for C5E325 (Lachancea thermotolerans (strain ATCC 56472 / CBS 6340 / NRRL Y-8284)) Explore C5E325  Go to UniProtKB:  C5E325

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.84 Å
• R-Value Free: 0.290 
• R-Value Work: 0.244 
• R-Value Observed: 0.247 
• Space Group: P 4 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.194	α = 90
b = 54.194	β = 90
c = 134.042	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PDB_EXTRACT	data extraction
AMPLE	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-09-07 
Deposition Author(s): Bock-Bierbaum, T., Funck, K., Daumke, O.

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Funding Organization	Location	Grant Number
European Research Council (ERC)	Germany	ERC-2013-CoG-616024
German Research Foundation (DFG)	Germany	FOR2848/P06

Revision History  

• Version 1.0: 2022-09-07
  Type: Initial release