1MWI

Crystal structure of a MUG-DNA product complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of a G:T/U mismatch-specific DNA glycosylase: mismatch recognition by complementary-strand interactions.

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

(1998) Cell 92: 117-129

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • G:U mismatches resulting from deamination of cytosine are the most common promutagenic lesions occurring in DNA. Uracil is removed in a base-excision repair pathway by uracil DNA-glycosylase (UDG), which excises uracil from both single- and double-st ...

    G:U mismatches resulting from deamination of cytosine are the most common promutagenic lesions occurring in DNA. Uracil is removed in a base-excision repair pathway by uracil DNA-glycosylase (UDG), which excises uracil from both single- and double-stranded DNA. Recently, a biochemically distinct family of DNA repair enzymes has been identified, which excises both uracil and thymine, but only from mispairs with guanine. Crystal structures of the mismatch-specific uracil DNA-glycosylase (MUG) from E. coli, and of a DNA complex, reveal a remarkable structural and functional homology to UDGs despite low sequence identity. Details of the MUG structure explain its thymine DNA-glycosylase activity and the specificity for G:U/T mispairs, which derives from direct recognition of guanine on the complementary strand.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University College London, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
G/U mismatch-specific DNA glycosylase
A
168Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: mug (ygjF)
EC: 3.2.2.28
Find proteins for P0A9H1 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9H1
Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*CP*GP*CP*GP*AP*GP*(AAB)P*TP*CP*GP*CP*G)-3'D12N/A
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
AAB
Query on AAB
D
DNA LINKINGC5 H11 O7 P

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RNAKd: 6000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.210 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 101.350α = 90.00
b = 101.350β = 90.00
c = 45.010γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
X-PLORrefinement
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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