X-ray diffraction
2Å resolution

High Resolution Crystal Structure Of Ketosteroid Isomerase Mutant D40N(D38N, Ti Numbering) from Pseudomonas putida Complexed With Equilenin At 2.0 A Resolution.


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

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Steroid Delta-isomerase Chains: A, B
Molecule details ›
Chains: A, B
Length: 131 amino acids
Theoretical weight: 14.55 KDa
Source organism: Pseudomonas putida
Expression system: Escherichia coli BL21(DE3)
  • Canonical: P07445 (Residues: 1-131; Coverage: 100%)
Gene name: ksi
Sequence domains: SnoaL-like domain
Structure domains: Nuclear Transport Factor 2; Chain: A,

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: MACSCIENCE M18X
Spacegroup: C2
Unit cell:
a: 88.3Å b: 72.4Å c: 51.2Å
α: 90° β: 90.56° γ: 90°
R R work R free
0.198 0.198 0.255
Expression system: Escherichia coli BL21(DE3)