1E3V

Crystal structure of ketosteroid isomerase from Psedomonas putida complexed with deoxycholate

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1e3va_	Alpha and beta proteins (a+b)	Cystatin-like	NTF2-like	Ketosteroid isomerase-like	Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI	(Pseudomonas putida ) [TaxId: 303 ],	SCOPe (2.08)
B	d1e3vb_	Alpha and beta proteins (a+b)	Cystatin-like	NTF2-like	Ketosteroid isomerase-like	Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI	(Pseudomonas putida ) [TaxId: 303 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	NTF2-like	8034008	3000472	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	NTF2-like	8034008	3000472	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	SnoaL_5	e1e3vA1	A: a+b two layers	X: Cystatin-like	H: NTF2-like (From Topology)	T: NTF2-like	F: SnoaL_5	ECOD (1.6)
B	SnoaL_5	e1e3vB1	A: a+b two layers	X: Cystatin-like	H: NTF2-like (From Topology)	T: NTF2-like	F: SnoaL_5	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.10.450.50	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)
B	3.10.450.50	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF12680	SnoaL-like domain (SnoaL_2)	SnoaL-like domain	This family contains a large number of proteins that share the SnoaL fold.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	STEROID DELTA-ISOMERASE	isomerase activity intramolecular oxidoreductase activity, transposing C=C bonds steroid delta-isomerase activity intramolecular oxidoreductase activity catalytic activity	organic cyclic compound metabolic process organic substance metabolic process steroid metabolic process metabolic process primary metabolic process lipid metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR032710	NTF2-like domain superfamily	Homologous Superfamily
A, B	IPR039256	Ketosteroid isomerase	Family
A, B	IPR037401	SnoaL-like domain	Domain

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	delta 5-3-ketosteroid isomerase M-CSA #349	Delta5-3 ketosteroid isomerase catalyses the isomerisation of delta5-3-ketosteroid to delta4-3-ketosteroid by intramolecular transfer of the C4beta proton to the C6beta position via a dienolic intermediate. The mechanism proceeds at a diffusion controlled limit within an environment shielded from solvent. In mammals, this reaction is an essential step in the biosynthesis of steroid hormones and is catalysed by a membrane-bound complex. In bacteria, the enzyme appears to play a metabolic role in the degrading steroid substrates.	Defined by 4 residues: TYR:A-16ASP:A-40ASP:A-100ASP:A-103 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.