Crystal structure of human MORC4 ATPase-CW in complex with AMPPNP

Experimental Data Snapshot

  • Resolution: 2.94 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 

Starting Model: experimental
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Molecular mechanism of the MORC4 ATPase activation.

Tencer, A.H.Cox, K.L.Wright, G.M.Zhang, Y.Petell, C.J.Klein, B.J.Strahl, B.D.Black, J.C.Poirier, M.G.Kutateladze, T.G.

(2020) Nat Commun 11: 5466-5466

  • DOI: https://doi.org/10.1038/s41467-020-19278-8
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Human Microrchidia 4 (MORC4) is associated with acute and chronic pancreatitis, inflammatory disorders and cancer but it remains largely uncharacterized. Here, we describe the structure-function relationship of MORC4 and define the molecular mechanism for MORC4 activation. Enzymatic and binding assays reveal that MORC4 has ATPase activity, which is dependent on DNA-binding functions of both the ATPase domain and CW domain of MORC4. The crystal structure of the ATPaseCW cassette of MORC4 and mutagenesis studies show that the DNA-binding site and the histone/ATPase binding site of CW are located on the opposite sides of the domain. The ATPase and CW domains cooperate in binding of MORC4 to the nucleosome core particle (NCP), enhancing the DNA wrapping around the histone core and impeding binding of DNA-associated proteins, such as transcription factors, to the NCP. In cells, MORC4 mediates formation of nuclear bodies in the nucleus and has a role in the progression of S-phase of the cell cycle, and both these functions require CW and catalytic activity of MORC4. Our findings highlight the mechanism for MORC4 activation, which is distinctly different from the mechanisms of action observed in other MORC family members.

  • Organizational Affiliation

    Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isoform 3 of MORC family CW-type zinc finger protein 4
A, B
458Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q8TE76 (Homo sapiens)
Explore Q8TE76 
Go to UniProtKB:  Q8TE76
GTEx:  ENSG00000133131 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TE76
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.94 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.424α = 90
b = 109.934β = 95.952
c = 70.39γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-11
    Type: Initial release
  • Version 1.1: 2023-10-18
    Changes: Data collection, Database references, Refinement description