2PFN

Na in the active site of DNA Polymerase lambda


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Role of the catalytic metal during polymerization by DNA polymerase lambda.

Garcia-Diaz, M.Bebenek, K.Krahn, J.M.Pedersen, L.C.Kunkel, T.A.

(2007) DNA Repair 6: 1333-1340

  • DOI: 10.1016/j.dnarep.2007.03.005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The incorporation of dNMPs into DNA by polymerases involves a phosphoryl transfer reaction hypothesized to require two divalent metal ions. Here we investigate this hypothesis using as a model human DNA polymerase lambda (Pol lambda), an enzyme sugge ...

    The incorporation of dNMPs into DNA by polymerases involves a phosphoryl transfer reaction hypothesized to require two divalent metal ions. Here we investigate this hypothesis using as a model human DNA polymerase lambda (Pol lambda), an enzyme suggested to be activated in vivo by manganese. We report the crystal structures of four complexes of human Pol lambda. In a 1.9 A structure of Pol lambda containing a 3'-OH and the non-hydrolyzable analog dUpnpp, a non-catalytic Na+ ion occupies the site for metal A and the ribose of the primer-terminal nucleotide is found in a conformation that positions the acceptor 3'-OH out of line with the alpha-phosphate and the bridging oxygen of the pyrophosphate leaving group. Soaking this crystal in MnCl2 yielded a 2.0 A structure with Mn2+ occupying the site for metal A. In the presence of Mn2+, the conformation of the ribose is C3'-endo and the 3'-oxygen is in line with the leaving oxygen, at a distance from the phosphorus atom of the alpha-phosphate (3.69 A) consistent with and supporting a catalytic mechanism involving two divalent metal ions. Finally, soaking with MnCl2 converted a pre-catalytic Pol lambda/Na+ complex with unreacted dCTP in the active site into a product complex via catalysis in the crystal. These data provide pre- and post-transition state information and outline in a single crystal the pathway for the phosphoryl transfer reaction carried out by DNA polymerases.


    Organizational Affiliation

    Laboratory of Structural Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase lambda
A
335Homo sapiensMutation(s): 1 
Gene Names: POLL
EC: 2.7.7.7, 4.2.99.-
Find proteins for Q9UGP5 (Homo sapiens)
Go to Gene View: POLL
Go to UniProtKB:  Q9UGP5
Entity ID: 1
MoleculeChainsLengthOrganism
TemplateT11N/A
Entity ID: 2
MoleculeChainsLengthOrganism
PrimerP6N/A
Entity ID: 3
MoleculeChainsLengthOrganism
Downstream PrimerD4N/A
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DUP
Query on DUP

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Download CCD File 
A
2'-DEOXYURIDINE 5'-ALPHA,BETA-IMIDO-TRIPHOSPHATE
C9 H16 N3 O13 P3
XZLLMTSKYYYJLH-SHYZEUOFSA-N
 Ligand Interaction
NA
Query on NA

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Download CCD File 
A, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.082α = 90.00
b = 61.557β = 90.00
c = 140.532γ = 90.00
Software Package:
Software NamePurpose
StructureStudiodata collection
DENZOdata reduction
PDB_EXTRACTdata extraction
HKL-2000data scaling
SCALEPACKdata scaling
MOLREPphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-15
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description