2WTU

Crystal structure of Escherichia coli MutS in complex with a 16 basepair oligo containing an A.A mismatch.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Magnesium coordination controls the molecular switch function of DNA mismatch repair protein MutS.

Lebbink, J.H.Fish, A.Reumer, A.Natrajan, G.Winterwerp, H.H.Sixma, T.K.

(2010) J. Biol. Chem. 285: 13131-13141

  • DOI: 10.1074/jbc.M109.066001
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The DNA mismatch repair protein MutS acts as a molecular switch. It toggles between ADP and ATP states and is regulated by mismatched DNA. This is analogous to G-protein switches and the regulation of their "on" and "off" states by guanine exchange f ...

    The DNA mismatch repair protein MutS acts as a molecular switch. It toggles between ADP and ATP states and is regulated by mismatched DNA. This is analogous to G-protein switches and the regulation of their "on" and "off" states by guanine exchange factors. Although GDP release in monomeric GTPases is accelerated by guanine exchange factor-induced removal of magnesium from the catalytic site, we found that release of ADP from MutS is not influenced by the metal ion in this manner. Rather, ADP release is induced by the binding of mismatched DNA at the opposite end of the protein, a long-range allosteric response resembling the mechanism of activation of heterotrimeric GTPases. Magnesium influences switching in MutS by inducing faster and tighter ATP binding, allowing rapid downstream responses. MutS mutants with decreased affinity for the metal ion are impaired in fast switching and in vivo mismatch repair. Thus, the G-proteins and MutS conceptually employ the same efficient use of the high energy cofactor: slow hydrolysis in the absence of a signal and fast conversion to the active state when required.


    Organizational Affiliation

    Division of Biochemistry and Center for Biomedical Genetics, Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands. j.lebbink@erasmusmc.nl




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA MISMATCH REPAIR PROTEIN MUTS
A, B
800Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: mutS (fdv)
Find proteins for P23909 (Escherichia coli (strain K12))
Go to UniProtKB:  P23909
Entity ID: 2
MoleculeChainsLengthOrganism
DNAE16synthetic construct
Entity ID: 3
MoleculeChainsLengthOrganism
DNAF16synthetic construct
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 91.105α = 90.00
b = 137.890β = 90.00
c = 161.446γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-07
    Type: Database references, Source and taxonomy