X-ray diffraction
2.3Å resolution

Ternary 5' complex of T7 DNA polymerase with a DNA primer/template containing a cis-syn thymine dimer on the template and an incoming nucleotide


Function and Biology Details

Reaction catalysed:
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
2 distinct polypeptide molecules
2 distinct DNA molecules
Macromolecules (4 distinct):
DNA-directed DNA polymerase Chain: A
Molecule details ›
Chain: A
Length: 698 amino acids
Theoretical weight: 79.09 KDa
Source organism: Escherichia phage T7
Expression system: Escherichia coli
  • Canonical: P00581 (Residues: 1-704; Coverage: 99%)
Gene name: 5
Structure domains:
Thioredoxin 1 Chain: B
Molecule details ›
Chain: B
Length: 108 amino acids
Theoretical weight: 11.69 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
  • Canonical: P0AA25 (Residues: 2-109; Coverage: 99%)
Gene names: JW5856, b3781, fipA, trxA, tsnC
Structure domains: Glutaredoxin
Molecule details ›
Chain: P
Length: 22 nucleotides
Theoretical weight: 6.74 KDa
Molecule details ›
Chain: T
Length: 25 nucleotides
Theoretical weight: 7.92 KDa

Ligands and Environments

2 bound ligands:
2 modified residues:

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X25
Spacegroup: P21212
Unit cell:
a: 104.983Å b: 212.599Å c: 51.945Å
α: 90° β: 90° γ: 90°
R R work R free
0.246 0.246 0.279
Expression system: Escherichia coli