Crystal structure of HORMA domain-containing protein 1 (HORMAD1) from Homo sapiens

Experimental Data Snapshot

  • Resolution: 2.67 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 

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Structural and biochemical insights into the interaction mechanism underlying HORMAD1 and its partner proteins.

Wang, H.Xie, R.Niu, F.Yang, Q.An, L.Wu, C.Liu, X.Yang, X.

(2023) Structure 31: 1578-1588.e3

  • DOI: https://doi.org/10.1016/j.str.2023.09.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The mammalian HORMA domain-containing protein 1 (HORMAD1) regulates DNA mismatch repair and homologous recombination (HR) repair in many cancers. Here, we show that the structure of human HORMAD1 adopts a self-closed conformation and displays an intra-molecular HORMA domain-closure motif interaction mode. Structural and biochemical data suggest that the interaction modes of the peptide motifs from HORMAD2 and MCM9 with HORMAD1 are highly similar to that of HORMAD1 own closure motif. The peptide motifs from diverse binding partners of HORMAD1 share a conserved Ser-Glu-Pro sequence. Additionally, structural comparison unveiled the HORMA-peptide motif interaction mode diversity among HORMA-containing proteins. Finally, cell-based assays revealed that this HORMA-closure motif interaction pattern contributes to DNA mismatch repair and is required for HORMAD1-dependent HR repair. Together, our results provide structural and biochemical insights into the common theme and functional plasticity of the HORMA domain-containing protein family, and also reveal a universal regulation mechanism for HORMAD1.

  • Organizational Affiliation

    College of Life Sciences, Institute of Life Sciences and Green Development, Hebei University, Baoding, Hebei 071002, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HORMA domain-containing protein 1394Homo sapiensMutation(s): 0 
Gene Names: HORMAD1
UniProt & NIH Common Fund Data Resources
Find proteins for Q86X24 (Homo sapiens)
Explore Q86X24 
Go to UniProtKB:  Q86X24
GTEx:  ENSG00000143452 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86X24
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.67 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.367α = 90
b = 64.498β = 90
c = 81.643γ = 90
Software Package:
Software NamePurpose
xia2data reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-20
    Type: Initial release
  • Version 1.1: 2024-04-03
    Changes: Database references