7K7Q image
Entry Detail
PDB ID:
7K7Q
Keywords:
Title:
CRYSTAL STRUCTURE OF TYROSINE KINASE 2 JH2 (PSEUDO KINASE DOMAIN) COMPLEXED WITH COMPOUND-12 AKA:6-[(cyclopropanecarbonyl)amino]-4-({3-[6-(dimethylcarbamoyl)pyridazin-3-yl]-2-methoxyphenyl}amino)-N-methylpyridazine-3-carboxamide
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-09-23
Release Date:
2021-08-04
Method Details:
Experimental Method:
Resolution:
2.27 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Non-receptor tyrosine-protein kinase TYK2
Chain IDs:A, B
Chain Length:317
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation

Abstact

A search for structurally diversified Tyk2 JH2 ligands from 6 (BMS-986165), a pyridazine carboxamide-derived Tyk2 JH2 ligand as a clinical Tyk2 inhibitor currently in late development for the treatment of psoriasis, began with a survey of six-membered heteroaryl groups in place of the N-methyl triazolyl moiety in 6. The X-ray co-crystal structure of an early lead (12) revealed a potential new binding pocket. Exploration of the new pocket resulted in two frontrunners for a clinical candidate. The potential hydrogen bonding interaction with Thr599 in the pocket was achieved with a tertiary amide moiety, confirmed by the X-ray co-crystal structure of 29. When the diversity search was extended to nicotinamides, a single fluorine atom addition was found to significantly enhance the permeability, which directly led to the discovery of 7 (BMS-986202) as a clinical Tyk2 inhibitor that binds to Tyk2 JH2. The preclinical studies of 7, including efficacy studies in mouse models of IL-23-driven acanthosis, anti-CD40-induced colitis, and spontaneous lupus, will also be presented.

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Primary Citation of related structures