3JAA

HUMAN DNA POLYMERASE ETA in COMPLEX WITH NORMAL DNA AND INCO NUCLEOTIDE (NRM)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 22.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular architecture of the Ub-PCNA/Pol eta complex bound to DNA

Lau, W.C.Li, Y.Zhang, Q.Huen, M.S.

(2015) Sci Rep 5: 15759-15759

  • DOI: 10.1038/srep15759
  • Primary Citation of Related Structures:  
    3JAA, 3JA9

  • PubMed Abstract: 
  • Translesion synthesis (TLS) is the mechanism by which DNA polymerases replicate through unrepaired DNA lesions. TLS is activated by monoubiquitination of the homotrimeric proliferating cell nuclear antigen (PCNA) at lysine-164, followed by the switch from replicative to specialized polymerases at DNA damage sites ...

    Translesion synthesis (TLS) is the mechanism by which DNA polymerases replicate through unrepaired DNA lesions. TLS is activated by monoubiquitination of the homotrimeric proliferating cell nuclear antigen (PCNA) at lysine-164, followed by the switch from replicative to specialized polymerases at DNA damage sites. Pol η belongs to the Y-Family of specialized polymerases that can efficiently bypass UV-induced lesions. Like other members of the Y-Family polymerases, its recruitment to the damaged sites is mediated by the interaction with monoubiquitinated PCNA (Ub-PCNA) via its ubiquitin-binding domain and non-canonical PCNA-interacting motif in the C-terminal region. The structural determinants underlying the direct recognition of Ub-PCNA by Pol η, or Y-Family polymerases in general, remain largely unknown. Here we report a structure of the Ub-PCNA/Pol η complex bound to DNA determined by single-particle electron microscopy (EM). The overall obtained structure resembles that of the editing PCNA/PolB complex. Analysis of the map revealed the conformation of ubiquitin that binds the C-terminal domain of Pol η. Our present study suggests that the Ub-PCNA/Pol η interaction requires the formation of a structured binding interface, which is dictated by the inherent flexibility of Ub-PCNA.


    Organizational Affiliation

    State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China.



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(*T*CP*AP*TP*TP*AP*TP*GP*AP*CP*GP*CP*T)-3T13synthetic construct
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(*TP*AP*GP*CP*GP*TP*CP*AP*T)-3')P9synthetic construct
      Experimental Data & Validation

      Experimental Data

      • Method: ELECTRON MICROSCOPY
      • Resolution: 22.0 Å
      • Aggregation State: PARTICLE 
      • Reconstruction Method: SINGLE PARTICLE 

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2015-12-23
        Type: Initial release
      • Version 1.1: 2019-10-23
        Changes: Data collection, Database references, Other
      • Version 1.2: 2019-12-18
        Changes: Data collection, Database references