› 1gs3

X-ray diffraction
2.1Å resolution

High resolution crystal structure of PI delta-5-3-Ketosteroid Isomerase mutants Y30F/Y55F/Y115F/D38N (Y32F/Y57F/Y119F/D40N, PI numbering)complexed with equilenin at 2.1 A resolution

Released:
DOI: 10.2210/pdb1gs3/pdb
PDB entry 1gs3 coloured by chain, front view.
PDB entry 1gs3 coloured by chain, side view.
PDB entry 1gs3 coloured by chain, top view.
Source organism: Pseudomonas putida
Entry authors: Shin S, Ha N-C, Oh B-H

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 domain:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-139594 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Steroid Delta-isomerase Chain: A
Molecule details ›
Chain: A
Length: 131 amino acids
Theoretical weight: 14.5 KDa
Source organism: Pseudomonas putida
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • 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:
Ligand EQU 1 x EQU
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: MACSCIENCE M18X
Spacegroup: C2221
Unit cell:
a: 36.319Å b: 96.237Å c: 74.431Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.213 0.213 0.275
Expression system: Escherichia coli BL21(DE3)

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