4DL3

Human DNA polymerase eta inserting dCMPNPP opposite GG template (GG0b).


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.205 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structural Basis for Chemoresistance to Cisplatin Mediated by DNA Polymerase eta

Zhao, Y.Biertumpfel, C.Gregory, M.T.Hua, Y.J.Hanaoka, F.Yang, W.

(2012) Proc Natl Acad Sci U S A 109: 7269-7274

  • DOI: https://doi.org/10.1073/pnas.1202681109
  • Primary Citation of Related Structures:  
    4DL2, 4DL3, 4DL4, 4DL5, 4DL6, 4DL7

  • PubMed Abstract: 

    Cisplatin (cis-diamminedichloroplatinum) and related compounds cause DNA damage and are widely used as anticancer agents. Chemoresistance to cisplatin treatment is due in part to translesion synthesis by human DNA polymerase η (hPol η). Here, we report crystal structures of hPol η complexed with intrastrand cisplatin-1,2-cross-linked DNA, representing four consecutive steps in translesion synthesis. In contrast to the generally enlarged and nondiscriminating active site of Y-family polymerases like Dpo4, Pol η is specialized for efficient bypass of UV-cross-linked pyrimidine dimers. Human Pol η differs from the yeast homolog in its binding of DNA template. To incorporate deoxycytidine opposite cisplatin-cross-linked guanines, hPol η undergoes a specific backbone rearrangement to accommodate the larger base dimer and minimizes the DNA distortion around the lesion. Our structural analyses show why Pol η is inefficient at extending primers after cisplatin lesions, which necessitates a second translesion DNA polymerase to complete bypass in vivo. A hydrophobic pocket near the primer-binding site in human Pol η is identified as a potential drug target for inhibiting translesion synthesis and, thereby, reducing chemoresistance.


  • Organizational Affiliation

    Institute of Nuclear-Agricultural Sciences, Zhejiang University, Hangzhou 310029, China.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA polymerase eta435Homo sapiensMutation(s): 0 
Gene Names: POLHRAD30RAD30AXPV
EC: 2.7.7.7
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y253 (Homo sapiens)
Explore Q9Y253 
Go to UniProtKB:  Q9Y253
PHAROS:  Q9Y253
GTEx:  ENSG00000170734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y253
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*AP*CP*GP*GP*TP*CP*AP*CP*AP*CP*T)-3')B [auth T]12N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*AP*GP*TP*GP*TP*GP*AP*C)-3')C [auth P]9N/A
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
0KX
Query on 0KX

Download Ideal Coordinates CCD File 
I [auth P]2'-deoxy-5'-O-[(R)-hydroxy{[(R)-hydroxy(phosphonooxy)phosphoryl]amino}phosphoryl]cytidine
C9 H17 N4 O12 P3
STYMTWKSQLVXJN-SHYZEUOFSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A],
H [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.205 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.38α = 90
b = 97.38β = 90
c = 81γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-09
    Type: Initial release
  • Version 1.1: 2013-06-26
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description