3THY

Human MutSbeta complexed with an IDL of 2 bases (Loop2) and ADP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism of mismatch repair revealed by human MutSbeta bound to unpaired DNA loops

Gupta, S.Gellert, M.Yang, W.

(2012) Nat Struct Mol Biol 19: 72-78

  • DOI: 10.1038/nsmb.2175
  • Primary Citation of Related Structures:  
    3THW, 3THX, 3THY, 3THZ

  • PubMed Abstract: 
  • DNA mismatch repair corrects replication errors, thus reducing mutation rates and microsatellite instability. Genetic defects in this pathway cause Lynch syndrome and various cancers in humans. Binding of a mispaired or unpaired base by bacterial MutS an ...

    DNA mismatch repair corrects replication errors, thus reducing mutation rates and microsatellite instability. Genetic defects in this pathway cause Lynch syndrome and various cancers in humans. Binding of a mispaired or unpaired base by bacterial MutS and eukaryotic MutSα is well characterized. We report here crystal structures of human MutSβ in complex with DNA containing insertion-deletion loops (IDL) of two, three, four or six unpaired nucleotides. In contrast to eukaryotic MutSα and bacterial MutS, which bind the base of a mismatched nucleotide, MutSβ binds three phosphates in an IDL. DNA is severely bent at the IDL; unpaired bases are flipped out into the major groove and partially exposed to solvent. A normal downstream base pair can become unpaired; a single unpaired base can thereby be converted to an IDL of two nucleotides and recognized by MutSβ. The C-terminal dimerization domains form an integral part of the MutS structure and coordinate asymmetrical ATP hydrolysis by Msh2 and Msh3 with mismatch binding to signal for repair.


    Organizational Affiliation

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



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA mismatch repair protein Msh2 A934Homo sapiensMutation(s): 0 
Gene Names: MSH2
Find proteins for P43246 (Homo sapiens)
Explore P43246 
Go to UniProtKB:  P43246
NIH Common Fund Data Resources
PHAROS:  P43246
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA mismatch repair protein Msh3 B918Homo sapiensMutation(s): 0 
Gene Names: DUC1DUGMSH3
Find proteins for P20585 (Homo sapiens)
Explore P20585 
Go to UniProtKB:  P20585
NIH Common Fund Data Resources
PHAROS:  P20585
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA Loop2 minus strandD24N/A
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(by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsLengthOrganismImage
DNA Loop2 plus strandE24N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.27α = 67.82
b = 91.106β = 86.98
c = 95.628γ = 73.35
Software Package:
Software NamePurpose
PHENIXrefinement
CNSrefinement
Blu-Icedata collection
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2011-08-19 
  • Released Date: 2011-12-21 
  • Deposition Author(s): Yang, W.

Revision History 

  • Version 1.0: 2011-12-21
    Type: Initial release
  • Version 1.1: 2013-06-26
    Changes: Database references
  • Version 1.2: 2019-07-17
    Changes: Data collection, Database references, Refinement description