N-terminal 40kDa fragment of NhPMS2 complexed with ADP

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 

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Structure and Function of the N-Terminal 40 kDa Fragment of Human Pms2: A Monomeric Ghl ATPase

Guarne, A.Junop, M.S.Yang, W.

(2001) EMBO J 20: 5521

  • DOI: https://doi.org/10.1093/emboj/20.19.5521
  • Primary Citation of Related Structures:  
    1EA6, 1H7S, 1H7U

  • PubMed Abstract: 

    Human MutLalpha, a heterodimer of hMLH1 and hPMS2, is essential for DNA mismatch repair. Inactivation of the hmlh1 or hpms2 genes by mutation or epigenesis causes genomic instability and a predisposition to hereditary non-polyposis cancer. We report here the X-ray crystal structures of the conserved N-terminal 40 kDa fragment of hPMS2, NhPMS2, and its complexes with ATPgammaS and ADP at 1.95, 2.7 and 2.7 A resolution, respectively. The NhPMS2 structures closely resemble the ATPase fragment of Escherichia coli MutL, which coordinates protein-protein interactions in mismatch repair by undergoing structural transformation upon binding of ATP. Unlike the E.coli MutL, whose ATPase activity requires protein dimerization, the monomeric form of NhPMS2 is active both in ATP hydrolysis and DNA binding. NhPMS2 is the first example of a GHL ATPase active as a monomer, suggesting that its activity may be modulated by hMLH1 in MutLalpha, and vice versa. The potential heterodimer interface revealed by crystallography provides a mutagenesis target for functional studies of MutLalpha.

  • Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
364Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P54278 (Homo sapiens)
Explore P54278 
Go to UniProtKB:  P54278
GTEx:  ENSG00000122512 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54278
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.043α = 90
b = 74.983β = 90
c = 135.294γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance