6n7w

Electron Microscopy
4.5Å resolution

Structure of bacteriophage T7 leading-strand DNA polymerase (D5A/E7A)/Trx in complex with a DNA fork and incoming dTTP (from multiple lead complexes)

Released:
Primary publication:
Structures and operating principles of the replisome.
Science 363 (2019)
PMID: 30679383
Related structures: EMD-0365

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
PDBe Complex ID:
PDB-CPX-120325 (preferred)
Entry contents:
2 distinct polypeptide molecules
2 distinct DNA molecules
Macromolecules (4 distinct):
DNA-directed DNA polymerase Chain: H
Molecule details ›
Chain: H
Length: 704 amino acids
Theoretical weight: 79.81 KDa
Source organism: Escherichia phage T7
Expression system: Escherichia coli
UniProt:
  • Canonical: P00581 (Residues: 1-704; Coverage: 100%)
Gene name: 5
Sequence domains: DNA polymerase family A
Thioredoxin 1 Chain: I
Molecule details ›
Chain: I
Length: 109 amino acids
Theoretical weight: 11.82 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli
UniProt:
  • Canonical: P0AA25 (Residues: 1-109; Coverage: 100%)
Gene names: JW5856, b3781, fipA, trxA, tsnC
Sequence domains: Thioredoxin
DNA (25-MER) Chain: P
Molecule details ›
Chain: P
Length: 25 nucleotides
Theoretical weight: 7.72 KDa
DNA (77-MER) Chain: T
Molecule details ›
Chain: T
Length: 76 nucleotides
Theoretical weight: 23.28 KDa

Ligands and Environments

2 bound ligands:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
Resolution: 4.5Å
Relevant EMDB volumes: EMD-0365
Expression system: Escherichia coli