Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 81.50 kDa 
• Atom Count: 5113 
• Residue Count: 623 
• Unique protein chains: 1

1H7S

N-terminal 40kDa fragment of human PMS2

• DOI: 10.2210/pdb1H7S/pdb

• Classification: DNA REPAIR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2001-07-10 Released: 2001-11-27 
• Deposition Author(s): Guarne, A., Junop, M.S., Yang, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.243 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

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

• PubMed: 11574484 
• DOI: 10.1093/emboj/20.19.5521
• Primary Citation of Related Structures:  
  1H7U, 1H7S, 1EA6


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PMS1 PROTEIN HOMOLOG 2	A, B	365	Homo sapiens	Mutation(s): 4  Gene Names: PMS2, PMSL2 EC: 3.1
Find proteins for P54278 (Homo sapiens) Explore P54278  Go to UniProtKB:  P54278
NIH Common Fund Data Resources
PHAROS:  P54278 GTEx:  ENSG00000122512

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A,B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.243 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.157	α = 90
b = 74.851	β = 90
c = 135.34	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-07-10 
• Released Date: 2001-11-27 
Deposition Author(s): Guarne, A., Junop, M.S., Yang, W.

Revision History 

• Version 1.0: 2001-11-27
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance