3MR3

Human DNA polymerase eta - DNA ternary complex with the 3'T of a CPD in the active site (TT1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and mechanism of human DNA polymerase eta.

Biertumpfel, C.Zhao, Y.Kondo, Y.Ramon-Maiques, S.Gregory, M.Lee, J.Y.Masutani, C.Lehmann, A.R.Hanaoka, F.Yang, W.

(2010) Nature 465: 1044-1048

  • DOI: 10.1038/nature09196
  • Primary Citation of Related Structures:  
    3SI8, 3MR2, 3MR3, 3MR5, 3MR6

  • PubMed Abstract: 
  • The variant form of the human syndrome xeroderma pigmentosum (XPV) is caused by a deficiency in DNA polymerase eta (Poleta), a DNA polymerase that enables replication through ultraviolet-induced pyrimidine dimers. Here we report high-resolution crystal structures of human Poleta at four consecutive steps during DNA synthesis through cis-syn cyclobutane thymine dimers ...

    The variant form of the human syndrome xeroderma pigmentosum (XPV) is caused by a deficiency in DNA polymerase eta (Poleta), a DNA polymerase that enables replication through ultraviolet-induced pyrimidine dimers. Here we report high-resolution crystal structures of human Poleta at four consecutive steps during DNA synthesis through cis-syn cyclobutane thymine dimers. Poleta acts like a 'molecular splint' to stabilize damaged DNA in a normal B-form conformation. An enlarged active site accommodates the thymine dimer with excellent stereochemistry for two-metal ion catalysis. Two residues conserved among Poleta orthologues form specific hydrogen bonds with the lesion and the incoming nucleotide to assist translesion synthesis. On the basis of the structures, eight Poleta missense mutations causing XPV can be rationalized as undermining the molecular splint or perturbing the active-site alignment. The structures also provide an insight into the role of Poleta in replicating through D loop and DNA fragile sites.


    Organizational Affiliation

    Laboratory of Molecular Biology, NIDDK, NIH, 9000 Rockville Pike, Building 5, Room B103, Bethesda, Maryland 20892, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase eta A435Homo sapiensMutation(s): 0 
Gene Names: POLHRAD30RAD30AXPV
EC: 2.7.7.7
Find proteins for Q9Y253 (Homo sapiens)
Explore Q9Y253 
Go to UniProtKB:  Q9Y253
NIH Common Fund Data Resources
PHAROS:  Q9Y253
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*CP*AP*(TTD)P*AP*TP*GP*AP*CP*GP*CP*T)-3')T11N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(*CP*AP*GP*CP*GP*TP*CP*AP*T)-3')P9N/A
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 1.75 Å
      • R-Value Free: 0.205 
      • R-Value Work: 0.188 
      • R-Value Observed: 0.188 
      • Space Group: P 61
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 98.243α = 90
      b = 98.243β = 90
      c = 82.306γ = 120
      Software Package:
      Software NamePurpose
      SERGUIdata collection
      PHASERphasing
      CNSrefinement
      XDSdata reduction
      XSCALEdata scaling

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2010-06-30
        Type: Initial release
      • Version 1.1: 2011-07-13
        Changes: Version format compliance
      • Version 1.2: 2012-03-21
        Changes: Database references