2R8K

Structure of the Eukaryotic DNA Polymerase eta in complex with 1,2-d(GpG)-cisplatin containing DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.230 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Bypass of DNA lesions generated during anticancer treatment with cisplatin by DNA polymerase eta

Alt, A.Lammens, K.Chiocchini, C.Lammens, A.Pieck, J.C.Kuch, D.Hopfner, K.P.Carell, T.

(2007) Science 318: 967-970

  • DOI: https://doi.org/10.1126/science.1148242
  • Primary Citation of Related Structures:  
    2R8J, 2R8K

  • PubMed Abstract: 

    DNA polymerase eta (Pol eta) is a eukaryotic lesion bypass polymerase that helps organisms to survive exposure to ultraviolet (UV) radiation, and tumor cells to gain resistance against cisplatin-based chemotherapy. It allows cells to replicate across cross-link lesions such as 1,2-d(GpG) cisplatin adducts (Pt-GG) and UV-induced cis-syn thymine dimers. We present structural and biochemical analysis of how Pol eta copies Pt-GG-containing DNA. The damaged DNA is bound in an open DNA binding rim. Nucleotidyl transfer requires the DNA to rotate into an active conformation, driven by hydrogen bonding of the templating base to the dNTP. For the 3'dG of the Pt-GG, this step is accomplished by a Watson-Crick base pair to dCTP and is biochemically efficient and accurate. In contrast, bypass of the 5'dG of the Pt-GG is less efficient and promiscuous for dCTP and dATP as a result of the presence of the rigid Pt cross-link. Our analysis reveals the set of structural features that enable Pol eta to replicate across strongly distorting DNA lesions.


  • Organizational Affiliation

    Munich Center for Integrated Protein Science (CiPS), Ludwig Maximilians University, D-81377 Munich, Germany.


Macromolecules

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
DNA polymerase etaE [auth A],
F [auth B]
554Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: RAD30DBH1
EC: 2.7.7.7
UniProt
Find proteins for Q04049 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04049 
Go to UniProtKB:  Q04049
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04049
Sequence Annotations
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  • Reference Sequence

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Entity ID: 1
MoleculeChains LengthOrganismImage
5'-D(*DGP*DTP*DGP*DGP*DTP*DGP*DAP*DGP*DC)-3'A [auth Q],
C [auth P]
9N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
5'-D(P*DGP*DGP*DCP*DTP*DCP*DAP*DCP*DCP*DAP*DC)-3'B [auth U],
D [auth T]
10N/A
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
DTP
Query on DTP

Download Ideal Coordinates CCD File 
K [auth A],
N [auth B]
2'-DEOXYADENOSINE 5'-TRIPHOSPHATE
C10 H16 N5 O12 P3
SUYVUBYJARFZHO-RRKCRQDMSA-N
CPT
Query on CPT

Download Ideal Coordinates CCD File 
G [auth U],
H [auth T]
Cisplatin
Cl2 H6 N2 Pt
LXZZYRPGZAFOLE-UHFFFAOYSA-L
CA
Query on CA

Download Ideal Coordinates CCD File 
I [auth A],
J [auth A],
L [auth B],
M [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.230 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.74α = 90
b = 103.74β = 90
c = 292.81γ = 90
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description