PDBe 4j9m

X-ray diffraction
2.25Å resolution

Human DNA polymerase eta-DNA ternary complex: misincorporation G opposite T after an A at the primer 3' end (AA/G)

Primary publication:
Mechanism of somatic hypermutation at the WA motif by human DNA polymerase η.
Proc. Natl. Acad. Sci. U.S.A. 110 8146-51 (2013)
PMID: 23630267

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 trimer (preferred)
Entry contents:
1 distinct polypeptide molecule
2 distinct DNA molecules
Macromolecules (3 distinct):
DNA polymerase eta Chain: A
Molecule details ›
Chain: A
Length: 435 amino acids
Theoretical weight: 48.62 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: Q9Y253 (Residues: 1-432; Coverage: 61%)
Gene names: POLH, RAD30, RAD30A, XPV
Sequence domains: impB/mucB/samB family
Structure domains: Dna Ligase; domain 1
DNA Chain: T
Molecule details ›
Chain: T
Length: 12 nucleotides
Theoretical weight: 3.65 KDa
Source organism: Synthetic construct
Expression system: Not provided
DNA Chain: P
Molecule details ›
Chain: P
Length: 9 nucleotides
Theoretical weight: 2.71 KDa
Source organism: Synthetic construct
Expression system: Not provided

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-BM
Spacegroup: P61
Unit cell:
a: 98.43Å b: 98.43Å c: 82.01Å
α: 90° β: 90° γ: 120°
R R work R free
0.211 0.18 0.223
Expression systems:
  • Escherichia coli
  • Not provided