4kpf

X-ray diffraction
3.24Å resolution

Novel fluoroquinolones in complex with topoisomerase IV from S. pneumoniae and E-site G-gate

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero octamer (preferred)
Entry contents:
2 distinct polypeptide molecules
4 distinct DNA molecules
Macromolecules (6 distinct):
DNA topoisomerase 4 subunit A Chains: A, B
Molecule details ›
Chains: A, B
Length: 496 amino acids
Theoretical weight: 56.46 KDa
Source organism: Streptococcus pneumoniae TIGR4
Expression system: Escherichia coli
UniProt:
  • Canonical: P72525 (Residues: 1-488; Coverage: 59%)
Gene names: SP_0855, parC
Sequence domains: DNA gyrase/topoisomerase IV, subunit A
DNA topoisomerase 4 subunit B Chains: C, D
Molecule details ›
Chains: C, D
Length: 268 amino acids
Theoretical weight: 30.42 KDa
Source organism: Streptococcus pneumoniae TIGR4
Expression system: Escherichia coli
UniProt:
  • Canonical: Q59961 (Residues: 404-647; Coverage: 38%)
Gene names: SP_0852, parE
Sequence domains:
Structure domains: Rossmann fold
E-site1 Chain: E
Molecule details ›
Chain: E
Length: 7 nucleotides
Theoretical weight: 2.12 KDa
E-site2 Chain: F
Molecule details ›
Chain: F
Length: 11 nucleotides
Theoretical weight: 3.35 KDa
E-site3 Chain: G
Molecule details ›
Chain: G
Length: 7 nucleotides
Theoretical weight: 2.11 KDa
E-site4 Chain: H
Molecule details ›
Chain: H
Length: 11 nucleotides
Theoretical weight: 3.36 KDa

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: DIAMOND BEAMLINE I02
Spacegroup: P3121
Unit cell:
a: 157.86Å b: 157.86Å c: 210.78Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.163 0.162 0.184
Expression system: Escherichia coli