5OFB

Crystal structure of human MORC2 (residues 1-603) with spinal muscular atrophy mutation S87L


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 

Starting Model: other
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This is version 1.3 of the entry. See complete history


Literature

Neuropathic MORC2 mutations perturb GHKL ATPase dimerization dynamics and epigenetic silencing by multiple structural mechanisms.

Douse, C.H.Bloor, S.Liu, Y.Shamin, M.Tchasovnikarova, I.A.Timms, R.T.Lehner, P.J.Modis, Y.

(2018) Nat Commun 9: 651-651

  • DOI: https://doi.org/10.1038/s41467-018-03045-x
  • Primary Citation of Related Structures:  
    5OF9, 5OFA, 5OFB

  • PubMed Abstract: 

    Missense mutations in MORC2 cause neuropathies including spinal muscular atrophy and Charcot-Marie-Tooth disease. We recently identified MORC2 as an effector of epigenetic silencing by the human silencing hub (HUSH). Here we report the biochemical and cellular activities of MORC2 variants, alongside crystal structures of wild-type and neuropathic forms of a human MORC2 fragment comprising the GHKL-type ATPase module and CW-type zinc finger. This fragment dimerizes upon binding ATP and contains a hinged, functionally critical coiled-coil insertion absent in other GHKL ATPases. We find that dimerization and DNA binding of the MORC2 ATPase module transduce HUSH-dependent silencing. Disease mutations change the dynamics of dimerization by distinct structural mechanisms: destabilizing the ATPase-CW module, trapping the ATP lid, or perturbing the dimer interface. These defects lead to the modulation of HUSH function, thus providing a molecular basis for understanding MORC2-associated neuropathies.


  • Organizational Affiliation

    Department of Medicine, MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, University of Cambridge, Cambridge, CB2 0QH, UK. cdouse@mrc-lmb.cam.ac.uk.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MORC family CW-type zinc finger protein 2A [auth B],
B [auth A]
606Homo sapiensMutation(s): 1 
Gene Names: MORC2KIAA0852ZCWCC1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y6X9 (Homo sapiens)
Explore Q9Y6X9 
Go to UniProtKB:  Q9Y6X9
PHAROS:  Q9Y6X9
GTEx:  ENSG00000133422 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y6X9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.85α = 90
b = 124.68β = 97.73
c = 80.36γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom101908/Z/13/Z
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/N011791/1

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-02-28
    Changes: Database references
  • Version 1.2: 2018-08-08
    Changes: Data collection, Database references
  • Version 1.3: 2024-05-01
    Changes: Data collection, Database references, Derived calculations, Refinement description