X-ray diffraction
1.72Å resolution

Structure of the enzyme-product complex resulting from TDG action on a G/hmU mismatch


Function and Biology Details

Reaction catalysed:
Hydrolyzes mismatched double-stranded DNA and polynucleotides, releasing free thymine
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
Entry contents:
1 distinct polypeptide molecule
2 distinct DNA molecules
Macromolecules (3 distinct):
G/T mismatch-specific thymine DNA glycosylase Chain: A
Molecule details ›
Chain: A
Length: 204 amino acids
Theoretical weight: 23.07 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: Q13569 (Residues: 111-308; Coverage: 48%)
Gene name: TDG
Sequence domains: Uracil DNA glycosylase superfamily
Structure domains: Uracil-DNA glycosylase-like domain
DNA (28-MER) Chain: C
Molecule details ›
Chain: C
Length: 28 nucleotides
Theoretical weight: 8.65 KDa
Source organism: unidentified
Expression system: Not provided
DNA (28-MER) Chain: D
Molecule details ›
Chain: D
Length: 28 nucleotides
Theoretical weight: 8.47 KDa
Source organism: unidentified
Expression system: Not provided

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL7-1
Spacegroup: C2
Unit cell:
a: 89.199Å b: 53.393Å c: 82.22Å
α: 90° β: 95.42° γ: 90°
R R work R free
0.19 0.188 0.232
Expression systems:
  • Escherichia coli
  • Not provided