1MUD image
Entry Detail
PDB ID:
1MUD
Keywords:
Title:
CATALYTIC DOMAIN OF MUTY FROM ESCHERICHIA COLI, D138N MUTANT COMPLEXED TO ADENINE
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
1998-08-20
Release Date:
1999-09-20
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Adenine DNA glycosylase
Mutations:D138N
Chain IDs:A
Chain Length:225
Number of Molecules:1
Biological Source:Escherichia coli
Primary Citation
MutY catalytic core, mutant and bound adenine structures define specificity for DNA repair enzyme superfamily.
Nat.Struct.Biol. 5 1058 1064 (1998)
PMID: 9846876 DOI: 10.1038/4168

Abstact

The DNA glycosylase MutY, which is a member of the Helix-hairpin-Helix (HhH) DNA glycosylase superfamily, excises adenine from mispairs with 8-oxoguanine and guanine. High-resolution crystal structures of the MutY catalytic core (cMutY), the complex with bound adenine, and designed mutants reveal the basis for adenine specificity and glycosyl bond cleavage chemistry. The two cMutY helical domains form a positively-charged groove with the adenine-specific pocket at their interface. The Watson-Crick hydrogen bond partners of the bound adenine are substituted by protein atoms, confirming a nucleotide flipping mechanism, and supporting a specific DNA binding orientation by MutY and structurally related DNA glycosylases.

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Primary Citation of related structures