C-terminal domain of Bacillus subtilis MutL crystal form II

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

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This is version 1.2 of the entry. See complete history


Structure of the endonuclease domain of MutL: unlicensed to cut.

Pillon, M.C.Lorenowicz, J.J.Uckelmann, M.Klocko, A.D.Mitchell, R.R.Chung, Y.S.Modrich, P.Walker, G.C.Simmons, L.A.Friedhoff, P.Guarne, A.

(2010) Mol Cell 39: 145-151

  • DOI: https://doi.org/10.1016/j.molcel.2010.06.027
  • Primary Citation of Related Structures:  
    3GAB, 3KDG, 3KDK

  • PubMed Abstract: 

    DNA mismatch repair corrects errors that have escaped polymerase proofreading, increasing replication fidelity 100- to 1000-fold in organisms ranging from bacteria to humans. The MutL protein plays a central role in mismatch repair by coordinating multiple protein-protein interactions that signal strand removal upon mismatch recognition by MutS. Here we report the crystal structure of the endonuclease domain of Bacillus subtilis MutL. The structure is organized in dimerization and regulatory subdomains connected by a helical lever spanning the conserved endonuclease motif. Additional conserved motifs cluster around the lever and define a Zn(2+)-binding site that is critical for MutL function in vivo. The structure unveils a powerful inhibitory mechanism to prevent undesired nicking of newly replicated DNA and allows us to propose a model describing how the interaction with MutS and the processivity clamp could license the endonuclease activity of MutL. The structure also provides a molecular framework to propose and test additional roles of MutL in mismatch repair.

  • Organizational Affiliation

    Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA mismatch repair protein mutL
A, B
197Bacillus subtilisMutation(s): 0 
Gene Names: BSU17050mutL
Find proteins for P49850 (Bacillus subtilis (strain 168))
Explore P49850 
Go to UniProtKB:  P49850
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49850
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.417α = 90
b = 74.335β = 90
c = 182.47γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Refinement description