3GAB

C-terminal domain of Bacillus subtilis MutL crystal form I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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: 10.1016/j.molcel.2010.06.027
  • Primary Citation of Related Structures:  

  • 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 mu ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA mismatch repair protein mutL
A, B, C, D
197Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: mutL
Find proteins for P49850 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P49850
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.216 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 88.288α = 90.00
b = 94.894β = 90.00
c = 218.663γ = 90.00
Software Package:
Software NamePurpose
CBASSdata collection
SOLVEphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance