1a31

X-ray diffraction
2.1Å resolution

HUMAN RECONSTITUTED DNA TOPOISOMERASE I IN COVALENT COMPLEX WITH A 22 BASE PAIR DNA DUPLEX

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
PDBe Complex ID:
PDB-CPX-113389 (preferred)
Entry contents:
1 distinct polypeptide molecule
2 distinct DNA molecules
Macromolecules (3 distinct):
DNA topoisomerase 1 Chain: A
Molecule details ›
Chain: A
Length: 591 amino acids
Theoretical weight: 70.12 KDa
Source organism: Homo sapiens
Expression system: Spodoptera frugiperda
UniProt:
  • Canonical: P11387 (Residues: 175-765; Coverage: 77%)
Gene name: TOP1
Sequence domains:
Structure domains:
DNA (5'-D(*AP*AP*AP*AP*AP*GP*AP*CP*5IUP*5IU*TP*GP*AP*AP*AP*AP*AP*5IUP*5IUP*5IUP*5IUP*T)-3') Chain: C
Molecule details ›
Chain: C
Length: 22 nucleotides
Theoretical weight: 7.45 KDa
Source organism: Homo sapiens
Expression system: Not provided
DNA (5'-D(*AP*AP*AP*AP*AP*TP*5IUP*5IUP*5IUP*5IUP*CP*AP*AP*AP*GP*TP*CP*TP*TP*TP*TP*T)-3') Chain: D
Molecule details ›
Chain: D
Length: 22 nucleotides
Theoretical weight: 7.16 KDa
Source organism: Homo sapiens
Expression system: Not provided

Ligands and Environments

No bound ligands
2 modified residues:

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-1
Spacegroup: P21
Unit cell:
a: 72Å b: 66.6Å c: 71.8Å
α: 90° β: 98.3° γ: 90°
R-values:
R R work R free
0.247 0.247 0.31
Expression systems:
  • Spodoptera frugiperda
  • Not provided