PDB Entry (1ms6)
PDB ID: 1ms6 Resolution: 1.9 Å Exp. Method: X-RAY DIFFRACTION
PMID: 12459015 DOI: 10.1021/jm020209i
Protein
Protein Name: Cathepsin S
Uniprot ID/ACC: P25774 (CATS_HUMAN) Organism: Homo sapiens (Human)
Gene Symbol: CTSS Gene ID: 1520
Protein Class: HYDROLASE
Ligand
Ligand Name:   MORPHOLINE-4-CARBOXYLIC ACID [1S-(2-BENZYLOXY-1R-CYANO-ETHYLCARBAMOYL)-3-METHYL-BUTYL]AMIDE
Canonical SMILES:   C1COCCN1C(=O)N[C@@H](CC(C)C)C(=O)N[C@H](C#N)COCc2ccccc2
Standard InChI:   InChI=1S/C21H30N4O4/c1-16(2)12-19(24-21(27)25-8-10-28-11-9-25)20(26)23-18(13-22)15-29-14-17-6-4-3-5-7-17/h3-7,16,18-19H,8-12,14-15H2,1-2H3,(H,23,26)(H,24,27)/t18-,19+/m1/s1
HET Code:   BLN PubChem:   5287799
DrugBank:   DB03767 ChEMBL:   CHEMBL153813
Molecular Formula:   C21H30N4O4 Mol. Weight:   402.2267 logP:   1.66808
HBD:   2 HBA:   5
#Rotatable Bonds:   9 TPSA:   103.69
Covalent Mechanism
Reaction Name Residue Chain ID SASA pKa Warhead Name Warhead Structure
Nucleophilic Addition to a Triple Bond CYS 25 A 16.18 12.62 Nitrile
Binding Affinity
Database Name Value
PDBBind Kd : 0.3 nM
BindingDB Kd : 0.3 nM , IC50 : 19 nM