› 3ov4

X-ray diffraction
1.83Å resolution

Crystal Structure of Ketosteroid Isomerase P39GV40GS42G from Pseudomonas Testosteroni (tKSI) bound to Equilenin

Released:
DOI: 10.2210/pdb3ov4/pdb
PDB entry 3ov4 coloured by chain, front view.
PDB entry 3ov4 coloured by chain, side view.
PDB entry 3ov4 coloured by chain, top view.
Source organism: Comamonas testosteroni
Entry authors: Gonzalez A, Tsai Y, Schwans J, Sunden F, Herschlag D

Function and Biology Details

Reaction catalysed: 
A 3-oxo-Delta(5)-steroid = a 3-oxo-Delta(4)-steroid
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-133706 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Steroid Delta-isomerase Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 125 amino acids
Theoretical weight: 13.3 KDa
Source organism: Comamonas testosteroni
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P00947 (Residues: 1-125; Coverage: 100%)
Gene name: ksi
Sequence domains: Nuclear transport factor 2 (NTF2) domain
Structure domains: Nuclear Transport Factor 2; Chain: A,

Ligands and Environments

2 bound ligands:
Ligand SO4 13 x SO4
Ligand EQU 3 x EQU
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-2, SSRL BEAMLINE BL9-1
Spacegroup: P6122
Unit cell:
a: 64.36Å b: 64.36Å c: 505.583Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.189 0.187 0.228
Expression system: Escherichia coli BL21

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