ISDA: 3IEJ

Deposition Date 2009-07-22

Release Date 2009-10-06

Last Version Date 2024-11-27

Entry Detail

PDB ID:

3IEJ

Keywords:

HYDROLASE

Title:

Pyrazole-based Cathepsin S Inhibitors with Arylalkynes as P1 Binding Elements

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.18 Å

R-Value Free:

0.26

R-Value Work:

0.18

R-Value Observed:

0.19

Space Group:

C 1 2 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cathepsin S
Gene (Uniprot):CTSS
Mutagens:C25S
Chain IDs:A, B
Chain Length:222
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P25774 Pfam ID:PF00112 EC:3.4.22.27

Ligand Molecules

599

Primary Citation

Pyrazole-based cathepsin S inhibitors with arylalkynes as P1 binding elements.

Ameriks, M.K, Axe, F.U, Bembenek, S.D, Edwards, J.P, Gu, Y, Karlsson, L, Randal, M, Sun, S, Thurmond, R.L, Zhu, J.Show

Bioorg.Med.Chem.Lett. 19 6131 6134 (2009)

PMID: 19773165 DOI: 10.1016/j.bmcl.2009.09.014

Abstact

A crystal structure of 1 bound to a Cys25Ser mutant of cathepsin S helped to elucidate the binding mode of a previously disclosed series of pyrazole-based CatS inhibitors and facilitated the design of a new class of arylalkyne analogs. Optimization of the alkyne and tetrahydropyridine portions of the pharmacophore provided potent CatS inhibitors (IC50=40-300 nM), and an X-ray structure of 32 revealed that the arylalkyne moiety binds in the S1 pocket of the enzyme.

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