Lineage for Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI
- Root: SCOP 1.63
Class d: Alpha and beta proteins (a+b) [53931] (224 folds) 
Fold d.17: Cystatin-like [54402] (5 superfamilies)
Core: alpha-beta(4); helix packs against coiled antiparallel beta-sheetSuperfamily d.17.4: NTF2-like [54427] (6 families) 
has a beta-alpha(2)-beta insertion after the main helix
Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI [54434] (1 protein)
Protein:
Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI [54435] (2 species) 
Species Comamonas testosteroni and Pseudomonas testosteroni [54436] (4 PDB entries) Species Pseudomonas putida [TaxId:303] [54437] (13 PDB entries)
More info for Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI
Timeline for Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI:
- Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI first appeared (with stable ids) in SCOP 1.55
- Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI appears in SCOP 1.61
- Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI appears in SCOP 1.65
- Family d.17.4.3: Delta-5-3-ketosteroid isomerase, steroid delta-isomerase, KSI appears in the current release, SCOPe 2.08, called Family d.17.4.3: Ketosteroid isomerase-like