9H8C image
Entry Detail
PDB ID:
9H8C
Keywords:
Title:
Human CDK8/Cyclin-C complex with inhibitor 2-9
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2024-10-29
Release Date:
2025-01-22
Method Details:
Experimental Method:
Resolution:
2.57 Å
R-Value Free:
0.26
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Cyclin-dependent kinase 8
Chain IDs:A
Chain Length:414
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Cyclin-C
Chain IDs:B
Chain Length:313
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Phenotype-Led Identification of IL-10 Upregulators in Human CD4 + T-cells and Elucidation of Their Pharmacology as Highly Selective CDK8/CDK19 Inhibitors.
J.Med.Chem. 68 1883 1900 (2025)
PMID: 39780505 DOI: 10.1021/acs.jmedchem.4c02630

Abstact

Therapeutics promoting the endogenous production of IL-10 have the potential to restore homeostasis in inflammatory disorders such as inflammatory bowel disease (IBD). Here we describe the identification of a series of IL-10 upregulators based on a pyrimidyl-piperidine scaffold through a high throughput phenotypic CD4+ T-cell multiplex assay. In vitro optimization of the initial hit yielded a lead with good potency and an in vitro clearance profile, compound 3-7, which additionally demonstrated efficacy in a murine endotoxin challenge PK-PD mechanistic model. Target deconvolution efforts identified compound 3-7 as a highly selective CDK8/19 inhibitor, and crystallographic studies unveiled its binding mode to the CDK8/Cyclin-C complex, characterized by an unusual water-mediated hydrogen bond to the kinase hinge region.

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