3OHA

Yeast DNA polymerase eta inserting dCTP opposite an 8oxoG lesion


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.159 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for error-free replication of oxidatively damaged DNA by yeast DNA polymerase eta.

Silverstein, T.D.Jain, R.Johnson, R.E.Prakash, L.Prakash, S.Aggarwal, A.K.

(2010) Structure 18: 1463-1470

  • DOI: 10.1016/j.str.2010.08.019
  • Primary Citation of Related Structures:  
    3OHA, 3OHB

  • PubMed Abstract: 
  • 7,8-dihydro-8-oxoguanine (8-oxoG) adducts are formed frequently by the attack of oxygen-free radicals on DNA. They are among the most mutagenic lesions in cells because of their dual coding potential, where, in addition to normal base-pairing of 8-oxoG(anti) with dCTP, 8-oxoG in the syn conformation can base pair with dATP, causing G to T transversions ...

    7,8-dihydro-8-oxoguanine (8-oxoG) adducts are formed frequently by the attack of oxygen-free radicals on DNA. They are among the most mutagenic lesions in cells because of their dual coding potential, where, in addition to normal base-pairing of 8-oxoG(anti) with dCTP, 8-oxoG in the syn conformation can base pair with dATP, causing G to T transversions. We provide here for the first time a structural basis for the error-free replication of 8-oxoG lesions by yeast DNA polymerase η (Polη). We show that the open active site cleft of Polη can accommodate an 8-oxoG lesion in the anti conformation with only minimal changes to the polymerase and the bound DNA: at both the insertion and post-insertion steps of lesion bypass. Importantly, the active site geometry remains the same as in the undamaged complex and provides a basis for the ability of Polη to prevent the mutagenic replication of 8-oxoG lesions in cells.


    Organizational Affiliation

    Department of Structural & Chemical Biology, Mount Sinai School of Medicine, Box 1677, 1425 Madison Avenue, New York, NY 10029, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase etaA520Saccharomyces cerevisiaeMutation(s): 2 
Gene Names: DBH1RAD30YDR419W
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*CP*CP*TP*CP*CP*CP*CP*TP*(DOC))-3'B [auth P]11N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      5'-D(P*TP*(8OG)P*GP*AP*GP*GP*GP*GP*AP*GP*GP*AP*C)-3'C [auth T]13N/A
      Small Molecules
      Ligands 3 Unique
      IDChainsName / Formula / InChI Key2D Diagram3D Interactions
      DCP
      Query on DCP

      Download Ideal Coordinates CCD File 
      D [auth A]2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE
      C9 H16 N3 O13 P3
      RGWHQCVHVJXOKC-SHYZEUOFSA-N
       Ligand Interaction
      SO4
      Query on SO4

      Download Ideal Coordinates CCD File 
      E [auth A], F [auth A], G [auth A]SULFATE ION
      O4 S
      QAOWNCQODCNURD-UHFFFAOYSA-L
       Ligand Interaction
      MG
      Query on MG

      Download Ideal Coordinates CCD File 
      H [auth A], I [auth A]MAGNESIUM ION
      Mg
      JLVVSXFLKOJNIY-UHFFFAOYSA-N
       Ligand Interaction
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.00 Å
      • R-Value Free: 0.195 
      • R-Value Work: 0.157 
      • R-Value Observed: 0.159 
      • Space Group: C 2 2 21
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 88.039α = 90
      b = 227.635β = 90
      c = 86.077γ = 90
      Software Package:
      Software NamePurpose
      DENZOdata reduction
      SCALEPACKdata scaling
      PHASERphasing
      REFMACrefinement
      PDB_EXTRACTdata extraction
      HKL-2000data collection

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2010-12-22
        Type: Initial release
      • Version 1.1: 2011-07-13
        Changes: Version format compliance
      • Version 1.2: 2017-11-08
        Changes: Refinement description