Non-productive MUG-DNA complex

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.275 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure of a DNA base-excision product resembling a cisplatin inter-strand adduct.

Barrett, T.E.Savva, R.Barlow, T.Brown, T.Jiricny, J.Pearl, L.H.

(1998) Nat Struct Biol 5: 697-701

  • DOI: https://doi.org/10.1038/1394
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Base-excision of a self-complementary oligonucleotide with central G:T mismatches by the G:T/U-specific mismatch DNA glycosylase (MUG), generates an unusual DNA structure which is remarkably similar in conformation to an interstrand DNA adduct of the anti-tumor drug cis-diamminedichloroplatinum. The abasic sugars generated by excision of the mismatched thymines are extruded from the double-helix, and the 'widowed' deoxyguanosines rotate so that their N7 and O6 groups protrude into the minor groove of the duplex and restack in an interleaved intercalative geometry, generating a kink in the helix axis.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University College London, UK.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
G/U mismatch-specific DNA glycosylaseC [auth A],
D [auth B]
168Escherichia coliMutation(s): 0 
Gene Names: mug
EC: 3.2.2 (PDB Primary Data), (UniProt)
Find proteins for P0A9H1 (Escherichia coli (strain K12))
Explore P0A9H1 
Go to UniProtKB:  P0A9H1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A9H1
Sequence Annotations
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
5'-D(*CP*GP*CP*GP*AP*GP*(AAB)P*TP*CP*GP*CP*G)-3'A [auth C],
B [auth D]
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.275 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.62α = 90
b = 84.86β = 90
c = 97.58γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-07-09
    Changes: Non-polymer description
  • Version 1.4: 2017-10-11
    Changes: Refinement description