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Structure of PDB 1cqs Chain B Binding Site BS01

Receptor Information
>1cqs Chain B (length=124) Species: 303 (Pseudomonas putida) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
NLPTAQEVQGLMARYIELVDVGDIEAIVQMYADDATVENPFGQPPIHGRE
QIAAFYRQGLGKVRACLTGPVRASHNGCGAMPFRVEMVWNGQPCALDVIE
VMRFDEHGRIQTMQAYWSEVNLSV
Ligand information
Ligand IDEQU
InChIInChI=1S/C18H18O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h2-5,10,16,19H,6-9H2,1H3/t16-,18-/m0/s1
InChIKeyPDRGHUMCVRDZLQ-WMZOPIPTSA-N
SMILES
SoftwareSMILES
ACDLabs 10.04O=C4C3(CCc1c(ccc2c1ccc(O)c2)C3CC4)C
CACTVS 3.341C[C@]12CCc3c(ccc4cc(O)ccc34)[C@@H]1CCC2=O
OpenEye OEToolkits 1.5.0CC12CCc3c4ccc(cc4ccc3C1CCC2=O)O
OpenEye OEToolkits 1.5.0C[C@]12CCc3c4ccc(cc4ccc3[C@@H]1CCC2=O)O
CACTVS 3.341C[C]12CCc3c(ccc4cc(O)ccc34)[CH]1CCC2=O
FormulaC18 H18 O2
NameEQUILENIN
ChEMBLCHEMBL225546
DrugBankDB03515
ZINCZINC000000393154
PDB chain1cqs Chain B Residue 802 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB1cqs Asp-99 donates a hydrogen bond not to Tyr-14 but to the steroid directly in the catalytic mechanism of Delta 5-3-ketosteroid isomerase from Pseudomonas putida biotype B
Resolution1.9 Å
Binding residue
(original residue number in PDB)		Y216 N240 M290 E303
Binding residue
(residue number reindexed from 1)		Y15 N39 M87 E100
Annotation score1
Enzymatic activity
Catalytic site (original residue number in PDB) Y216 N240 D300 E303
Catalytic site (residue number reindexed from 1) Y15 N39 D97 E100
Enzyme Commision number 5.3.3.1: steroid Delta-isomerase.
Gene Ontology
Molecular Function
GO:0004769 steroid delta-isomerase activity
GO:0016853 isomerase activity
Biological Process
GO:0008202 steroid metabolic process

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Molecular Function
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Biological Process
External links
PDB RCSB:1cqs, PDBe:1cqs, PDBj:1cqs
PDBsum1cqs
PubMed10653633
UniProtP07445|SDIS_PSEPU Steroid Delta-isomerase (Gene Name=ksi)

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