2XGP

Yeast DNA polymerase eta in complex with C8-2-acetylaminofluorene containing DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report



Literature

Mechanism of Replication Blocking and Bypass of Y-Family Polymerase Eta by Bulky Acetylaminofluorene DNA Adducts.

Schorr, S.Schneider, S.Lammens, K.Hopfner, K.P.Carell, T.

(2010) Proc Natl Acad Sci U S A 107: 20720

  • DOI: 10.1073/pnas.1008894107
  • Primary Citation of Related Structures:  
    2XGQ, 2XGP

  • PubMed Abstract: 
  • Heterocyclic aromatic amines produce bulky C8 guanine lesions in vivo, which interfere and disrupt DNA and RNA synthesis. These lesions are consequently strong replication blocks. In addition bulky adducts give rise to point and frameshift mutations. The ...

    Heterocyclic aromatic amines produce bulky C8 guanine lesions in vivo, which interfere and disrupt DNA and RNA synthesis. These lesions are consequently strong replication blocks. In addition bulky adducts give rise to point and frameshift mutations. The translesion synthesis (TLS) DNA polymerase η is able to bypass slowly C8 bulky adduct lesions such as the widely studied 2-aminofluorene-dG and its acetylated analogue mainly in an error-free manner. Replicative polymerases are in contrast fully blocked by the acetylated lesion. Here, we show that TLS efficiency of Pol η depends critically on the size of the bulky adduct forming the lesion. Based on the crystal structure, we show why the bypass reaction is so difficult and we provide a model for the bypass reaction. In our model, TLS is accomplished without rotation of the lesion into the anti conformation as previously thought.


    Organizational Affiliation

    Department of Chemistry, Center for Integrated Protein Science CIPS, Ludwig-Maximilians University, D-81377 Munich, Germany.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA POLYMERASE ETA AB536Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.7
Find proteins for Q04049 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04049 
Go to UniProtKB:  Q04049
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    5'-D(*GP*TP*GP*GP*AP*TP*GP*AP*G)-3'P, Q9N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      5'-D(*CP*8FG*CP*TP*CP*AP*TP*CP*CP*AP*C)-3'T, U11N/A
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.70 Å
      • R-Value Free: 0.272 
      • R-Value Work: 0.220 
      • R-Value Observed: 0.224 
      • Space Group: P 41 21 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 103.44α = 90
      b = 103.44β = 90
      c = 292.35γ = 90
      Software Package:
      Software NamePurpose
      REFMACrefinement
      XDSdata reduction
      XSCALEdata scaling
      PHASERphasing

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History 

      • Version 1.0: 2010-11-03
        Type: Initial release
      • Version 1.1: 2011-05-08
        Changes: Version format compliance
      • Version 1.2: 2011-07-13
        Changes: Version format compliance
      • Version 2.0: 2017-12-06
        Changes: Advisory, Atomic model, Source and taxonomy