X-ray diffraction
2.9Å resolution

Structure of Human DNA Polymerase Iota complexed with N2-ethylguanine and incoming TTP

Source organism: Homo sapiens
Primary publication:
Lesion bypass of N2-ethylguanine by human DNA polymerase iota.
J. Biol. Chem. 284 1732-40 (2009)
PMID: 18984581

Function and Biology Details

Reaction catalysed:
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero hexamer (preferred)
Entry contents:
1 distinct polypeptide molecule
1 distinct DNA molecule
Macromolecules (2 distinct):
DNA polymerase iota Chain: A
Molecule details ›
Chain: A
Length: 420 amino acids
Theoretical weight: 47.03 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: Q9UNA4 (Residues: 26-445; Coverage: 57%)
Gene names: POLI, RAD30B
Sequence domains: impB/mucB/samB family
Structure domains:
Molecule details ›
Chains: B, C
Length: 18 nucleotides
Theoretical weight: 5.52 KDa
Source organism: Homo sapiens
Expression system: Not provided

Ligands and Environments

2 bound ligands:

2 modified residues:

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU MICROMAX-007
Spacegroup: P6522
Unit cell:
a: 98.643Å b: 98.643Å c: 202.231Å
α: 90° β: 90° γ: 120°
R R work R free
0.239 0.236 0.282
Expression systems:
  • Escherichia coli
  • Not provided