1EWN image
Entry Detail
PDB ID:
1EWN
Keywords:
hydrolase/DNA
Title:
CRYSTAL STRUCTURE OF THE HUMAN AAG DNA REPAIR GLYCOSYLASE COMPLEXED WITH 1,N6-ETHENOADENINE-DNA
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2000-04-26
Release Date:
2000-12-11
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.10 Å
R-Value Free:
0.25
R-Value Work:
0.23
Space Group:
P 21 21 21
1EWN validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:3-METHYL-ADENINE DNA GLYCOSYLASE
Chain IDs:C (auth: A)
Chain Length:219
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P29372 Pfam ID:PF02245 EC:3.2.2.21
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
EDA A DA ?
Ligand Molecules
NA
Primary Citation
Molecular basis for discriminating between normal and damaged bases by the human alkyladenine glycosylase, AAG.
Proc.Natl.Acad.Sci.USA 97 13573 13578 (2000)
PMID: 11106395 DOI: 10.1073/pnas.97.25.13573

Abstact

The human 3-methyladenine DNA glycosylase [alkyladenine DNA glycosylase (AAG)] catalyzes the first step of base excision repair by cleaving damaged bases from DNA. Unlike other DNA glycosylases that are specific for a particular type of damaged base, AAG excises a chemically diverse selection of substrate bases damaged by alkylation or deamination. The 2.1-A crystal structure of AAG complexed to DNA containing 1,N(6)-ethenoadenine suggests how modified bases can be distinguished from normal DNA bases in the enzyme active site. Mutational analyses of residues contacting the alkylated base in the crystal structures suggest that the shape of the damaged base, its hydrogen-bonding characteristics, and its aromaticity all contribute to the selective recognition of damage by AAG.

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Protein

Chemical

Disease

Primary Citation of related structures
1BNK