1E3V
Crystal structure of ketosteroid isomerase from Psedomonas putida complexed with deoxycholate
External Resource: 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: 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 |
|---|---|---|---|---|---|
| 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 |
|---|---|---|---|---|
| STEROID DELTA-ISOMERASE | - |
InterPro: Protein Family Classification InterPro Database Homepage
| Chains | Accession | Name | Type |
|---|---|---|---|
| IPR032710 | NTF2-like domain superfamily | Homologous Superfamily | |
| IPR039256 | Ketosteroid isomerase | Family | |
| IPR037401 | SnoaL-like domain | Domain |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
| Chains | Enzyme Name | Description | Catalytic Residues |
|---|---|---|---|
| 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. | EC: 5.3.3.1 (UniProt) |
