X-ray diffraction
2.01Å resolution

Human steroidogenic cytochrome P450 17A1 with 3-keto-5alpha-abiraterone analog

Source organism: Homo sapiens
Entry authors: Petrunak EM, Bart AG, Scott EE

Function and Biology Details

Reactions catalysed:
17-alpha-hydroxypregnenolone + [reduced NADPH--hemoprotein reductase] + O(2) = 3-beta-hydroxyandrost-5-en-17-one + acetate + [oxidized NADPH--hemoprotein reductase] + H(2)O
A C(21)-steroid + [reduced NADPH--hemoprotein reductase] + O(2) = a 17-alpha-hydroxy-C(21)-steroid + [oxidized NADPH--hemoprotein reductase] + H(2)O
Biochemical function:
Biological process:

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Steroid 17-alpha-hydroxylase/17,20 lyase Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 494 amino acids
Theoretical weight: 55.74 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: P05093 (Residues: 24-508; Coverage: 96%)
Gene names: CYP17, CYP17A1, S17AH
Sequence domains: Cytochrome P450

Ligands and Environments

Cofactor: Ligand HEM 4 x HEM
2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL12-2
Spacegroup: P212121
Unit cell:
a: 85.722Å b: 151.182Å c: 169.944Å
α: 90° β: 90° γ: 90°
R R work R free
0.187 0.185 0.218
Expression system: Escherichia coli