PDB Entry (2xu3)
PDB ID: 2xu3 Resolution: 0.9 Å Exp. Method: X-RAY DIFFRACTION
PMID: 21184410 DOI: 10.1002/ANIE.201006781
Protein
Protein Name: Procathepsin L
Uniprot ID/ACC: P07711 (CATL1_HUMAN) Organism: Homo sapiens (Human)
Gene Symbol: CTSL Gene ID: 1514
Protein Class: HYDROLASE
Ligand
Ligand Name:   (2S,4R)-4-(2-chlorobenzenesulfonyl)-1-[1-(5-chlorothiophen-2-yl)cyclopropanecarbonyl]-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide
Canonical SMILES:   Clc1ccc(s1)C2(CC2)C(=O)N3C[C@@H](C[C@H]3C(=O)NC4(C#N)CC4)S(=O)(=O)c5ccccc5Cl
Standard InChI:   InChI=1S/C23H21Cl2N3O4S2/c24-15-3-1-2-4-17(15)34(31,32)14-11-16(20(29)27-22(13-26)7-8-22)28(12-14)21(30)23(9-10-23)18-5-6-19(25)33-18/h1-6,14,16H,7-12H2,(H,27,29)/t14-,16+/m1/s1
HET Code:   XU3 PubChem:   -
DrugBank:   - ChEMBL:   -
Molecular Formula:   C23H21Cl2N3O4S2 Mol. Weight:   537.03503 logP:   3.70228
HBD:   1 HBA:   6
#Rotatable Bonds:   6 TPSA:   107.34
Covalent Mechanism
Reaction Name Residue Chain ID SASA pKa Warhead Name Warhead Structure
Nucleophilic Addition to a Triple Bond CYS 25 A 18.37 13.55 Nitrile
Binding Affinity
Database Name Value
PDBBind IC50 : 160 nM