6JFL

Nucleotide-free Mitofusin2 (MFN2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.81 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural insights of human mitofusin-2 into mitochondrial fusion and CMT2A onset.

Li, Y.J.Cao, Y.L.Feng, J.X.Qi, Y.Meng, S.Yang, J.F.Zhong, Y.T.Kang, S.Chen, X.Lan, L.Luo, L.Yu, B.Chen, S.Chan, D.C.Hu, J.Gao, S.

(2019) Nat Commun 10: 4914-4914

  • DOI: https://doi.org/10.1038/s41467-019-12912-0
  • Primary Citation of Related Structures:  
    6JFK, 6JFL, 6JFM

  • PubMed Abstract: 

    Mitofusin-2 (MFN2) is a dynamin-like GTPase that plays a central role in regulating mitochondrial fusion and cell metabolism. Mutations in MFN2 cause the neurodegenerative disease Charcot-Marie-Tooth type 2A (CMT2A). The molecular basis underlying the physiological and pathological relevance of MFN2 is unclear. Here, we present crystal structures of truncated human MFN2 in different nucleotide-loading states. Unlike other dynamin superfamily members including MFN1, MFN2 forms sustained dimers even after GTP hydrolysis via the GTPase domain (G) interface, which accounts for its high membrane-tethering efficiency. The biochemical discrepancy between human MFN2 and MFN1 largely derives from a primate-only single amino acid variance. MFN2 and MFN1 can form heterodimers via the G interface in a nucleotide-dependent manner. CMT2A-related mutations, mapping to different functional zones of MFN2, lead to changes in GTP hydrolysis and homo/hetero-association ability. Our study provides fundamental insight into how mitofusins mediate mitochondrial fusion and the ways their disruptions cause disease.


  • Organizational Affiliation

    State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mitofusin-2,cDNA FLJ57997, highly similar to Transmembrane GTPase MFN2
A, B, C, D
438Homo sapiensMutation(s): 0 
Gene Names: MFN2CPRP1KIAA0214
EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for O95140 (Homo sapiens)
Explore O95140 
Go to UniProtKB:  O95140
PHAROS:  O95140
GTEx:  ENSG00000116688 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95140
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.81 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.482α = 90
b = 128.424β = 106.27
c = 91.329γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina--

Revision History  (Full details and data files)

  • Version 1.0: 2019-11-13
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Refinement description