PDB Entry (4x6h)
PDB ID: 4x6h Resolution: 1.0 Å Exp. Method: X-RAY DIFFRACTION
PMID: 26280490 DOI: 10.1021/acs.jmedchem.5b00746
Protein
Protein Name: Cathepsin K
Uniprot ID/ACC: P43235 (CATK_HUMAN) Organism: Homo sapiens (Human)
Gene Symbol: CTSK Gene ID: 1513
Protein Class: HYDROLASE
Ligand
Ligand Name:   4-amino-N-{1-[(cyanomethyl)carbamoyl]cyclohexyl}-3-fluorobenzamide
Canonical SMILES:   Nc1ccc(cc1F)C(=O)NC2(C(=O)NCC#N)CCCCC2
Standard InChI:   InChI=1S/C16H19FN4O2/c17-12-10-11(4-5-13(12)19)14(22)21-16(6-2-1-3-7-16)15(23)20-9-8-18/h4-5,10H,1-3,6-7,9,19H2,(H,20,23)(H,21,22)
HET Code:   3XT PubChem:   91885514
DrugBank:   - ChEMBL:   CHEMBL3605413
Molecular Formula:   C16H19FN4O2 Mol. Weight:   318.1492 logP:   1.48038
HBD:   3 HBA:   4
#Rotatable Bonds:   4 TPSA:   108.01
Covalent Mechanism
Reaction Name Residue Chain ID SASA pKa Warhead Name Warhead Structure
Nucleophilic Addition to a Triple Bond CYS 25 A 16.24 13.56 Nitrile
Binding Affinity
Database Name Value
BindingDB Ki : 22 nM
Binding MOAD Ki : 22 nM