4KLG

DNA polymerase beta matched product complex with Mg2+, 40 s


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Observing a DNA polymerase choose right from wrong.

Freudenthal, B.D.Beard, W.A.Shock, D.D.Wilson, S.H.

(2013) Cell 154: 157-168

  • DOI: 10.1016/j.cell.2013.05.048
  • Primary Citation of Related Structures:  
    4KLM, 4KLO, 4KLQ, 4KLS, 4KLT, 4KLE, 4KLF, 4KLG, 4KLH, 4KLI

  • PubMed Abstract: 
  • DNA polymerase (pol) β is a model polymerase involved in gap-filling DNA synthesis utilizing two metals to facilitate nucleotidyl transfer. Previous structural studies have trapped catalytic intermediates by utilizing substrate analogs (dideoxy-terminated primer or nonhydrolysable incoming nucleotide) ...

    DNA polymerase (pol) β is a model polymerase involved in gap-filling DNA synthesis utilizing two metals to facilitate nucleotidyl transfer. Previous structural studies have trapped catalytic intermediates by utilizing substrate analogs (dideoxy-terminated primer or nonhydrolysable incoming nucleotide). To identify additional intermediates during catalysis, we now employ natural substrates (correct and incorrect nucleotides) and follow product formation in real time with 15 different crystal structures. We are able to observe molecular adjustments at the active site that hasten correct nucleotide insertion and deter incorrect insertion not appreciated previously. A third metal binding site is transiently formed during correct, but not incorrect, nucleotide insertion. Additionally, long incubations indicate that pyrophosphate more easily dissociates after incorrect, compared to correct, nucleotide insertion. This appears to be coupled to subdomain repositioning that is required for catalytic activation/deactivation. The structures provide insights into a fundamental chemical reaction that impacts polymerase fidelity and genome stability.


    Organizational Affiliation

    Laboratory of Structural Biology, National Institute of Environmental Health Sciences, National Institutes of Health, P.O. Box 12233, Research Triangle Park, NC 27709-2233, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase betaA335Homo sapiensMutation(s): 0 
Gene Names: POLB
EC: 2.7.7.7 (PDB Primary Data), 4.2.99 (PDB Primary Data)
Find proteins for P06746 (Homo sapiens)
Explore P06746 
Go to UniProtKB:  P06746
NIH Common Fund Data Resources
PHAROS  P06746
Protein Feature View
Expand
  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'-D(*CP*CP*GP*AP*CP*GP*GP*CP*GP*CP*AP*TP*CP*AP*GP*C)-3'T16N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      5'-D(*GP*CP*TP*GP*AP*TP*GP*CP*GP*CP*C)-3'P11N/A
      • Find similar nucleic acids by:  Sequence   |   Structure
      • Entity ID: 3
        MoleculeChainsLengthOrganismImage
        5'-D(P*GP*TP*CP*GP*G)-3'D5N/A
        Experimental Data & Validation

        Experimental Data

        • Method: X-RAY DIFFRACTION
        • Resolution: 1.70 Å
        • R-Value Free: 0.229 
        • R-Value Work: 0.188 
        • R-Value Observed: 0.192 
        • Space Group: P 1 21 1
        Unit Cell:
        Length ( Å )Angle ( ˚ )
        a = 51.109α = 90
        b = 80.478β = 107.78
        c = 55.529γ = 90
        Software Package:
        Software NamePurpose
        DENZOdata reduction
        SCALEPACKdata scaling
        PHENIXrefinement
        PDB_EXTRACTdata extraction
        StructureStudiodata collection
        CNSphasing

        Structure Validation

        View Full Validation Report



        Entry History 

        Deposition Data

        Revision History 

        • Version 1.0: 2013-07-17
          Type: Initial release
        • Version 1.1: 2017-11-15
          Changes: Refinement description