2GWS

Crystal Structure of human DNA Polymerase lambda with a G/G mismatch in the primer terminus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Promiscuous mismatch extension by human DNA polymerase lambda.

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

(2006) Nucleic Acids Res. 34: 3259-3266

  • DOI: 10.1093/nar/gkl377

  • PubMed Abstract: 
  • DNA polymerase lambda (Pol lambda) is one of several DNA polymerases suggested to participate in base excision repair (BER), in repair of broken DNA ends and in translesion synthesis. It has been proposed that the nature of the DNA intermediates part ...

    DNA polymerase lambda (Pol lambda) is one of several DNA polymerases suggested to participate in base excision repair (BER), in repair of broken DNA ends and in translesion synthesis. It has been proposed that the nature of the DNA intermediates partly determines which polymerase is used for a particular repair reaction. To test this hypothesis, here we examine the ability of human Pol lambda to extend mismatched primer-termini, either on 'open' template-primer substrates, or on its preferred substrate, a 1 nt gapped-DNA molecule having a 5'-phosphate. Interestingly, Pol lambda extended mismatches with an average efficiency of approximately 10(-2) relative to matched base pairs. The match and mismatch extension catalytic efficiencies obtained on gapped molecules were approximately 260-fold higher than on template-primer molecules. A crystal structure of Pol lambda in complex with a single-nucleotide gap containing a dG.dGMP mismatch at the primer-terminus (2.40 A) suggests that, at least for certain mispairs, Pol lambda is unable to differentiate between matched and mismatched termini during the DNA binding step, thus accounting for the relatively high efficiency of mismatch extension. This property of Pol lambda suggests a potential role as a 'mismatch extender' during non-homologous end joining (NHEJ), and possibly during translesion synthesis.


    Organizational Affiliation

    Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma, 28049 Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase lambda
A, E, I, M
335Homo sapiensMutation(s): 0 
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
5'-D(*CP*GP*GP*CP*AP*GP*CP*GP*CP*AP*C)-3'T,F,J,N11N/A
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*GP*TP*GP*CP*GP*G)-3'P,G,K,R6N/A
Entity ID: 3
MoleculeChainsLengthOrganism
5'-D(P*GP*CP*CP*G)-3'D,H,L,Q4N/A
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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A, E, I, M, P, Q, T
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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E, N
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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F
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CAC
Query on CAC

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D, H, J
CACODYLATE ION
dimethylarsinate
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.209 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 192.374α = 90.00
b = 98.268β = 90.00
c = 104.960γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-09-05
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description