ISDA

Deposition Date 2020-05-05

Release Date 2021-05-12

Last Version Date 2024-10-16

Entry Detail

PDB ID:

6YYQ

Keywords:

HYDROLASE

Title:

Structure of Cathepsin S in complex with Compound 3

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.51 Å

R-Value Free:

0.28

R-Value Work:

0.20

Space Group:

P 32 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cathepsin S
Gene (Uniprot):CTSS
Chain IDs:A (auth: AAA), B (auth: BBB), C (auth: CCC), D (auth: DDD)
Chain Length:225
Number of Molecules:4
Biological Source:Homo sapiens

UniProt ID:P25774 Pfam ID:PF00112 EC:3.4.22.27

Ligand Molecules

Q1Q

Primary Citation

Highly Selective Sub-Nanomolar Cathepsin S Inhibitors by Merging Fragment Binders with Nitrile Inhibitors.

Schade, M, Merla, B, Lesch, B, Wagener, M, Timmermanns, S, Pletinckx, K, Hertrampf, T.Show

J.Med.Chem. 63 11801 11808 (2020)

PMID: 32880457 DOI: 10.1021/acs.jmedchem.0c00949

Abstact

Pharmacological inhibition of cathepsin S (CatS) allows for a specific modulation of the adaptive immune system and many major diseases. Here, we used NMR fragment screening and crystal structure-aided merging to synthesize novel, highly selective CatS inhibitors with picomolar enzymatic Ki values and nanomolar functional activity in human Raji cells. Noncovalent fragment hits revealed binding hotspots, while the covalent inhibitor structure-activity relationship enabled efficient potency optimization.

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Primary Citation of related structures