6BH4

LINKED KDM5A JMJ DOMAIN BOUND TO THE INHIBITOR 5-(1-(tert-butyl)-1H-pyrazol-4-yl)-6-isopropyl-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (Compound N75/CPI-48)

Summary for 6BH4

• Entry DOI: 10.2210/pdb6bh4/pdb
• Descriptor: Lysine-specific demethylase 5A, linked KDM5A JMJ domain, 5-(1-tert-butyl-1H-pyrazol-4-yl)-7-oxo-6-(propan-2-yl)-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile, MANGANESE (II) ION, ... (6 entities in total)
• Functional Keywords: demethylase inhibition, oxidoreductase-oxidoreductase inhibitor complex, oxidoreductase, oxidoreductase-inhibitor complex, oxidoreductase/inhibitor
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 1
• Total formula weight: 38850.72

Authors

Horton, J.R.,Cheng, X. (deposition date: 2017-10-29, release date: 2018-03-28, Last modification date: 2023-10-04)

Primary citation

Horton, J.R.,Liu, X.,Wu, L.,Zhang, K.,Shanks, J.,Zhang, X.,Rai, G.,Mott, B.T.,Jansen, D.J.,Kales, S.C.,Henderson, M.J.,Pohida, K.,Fang, Y.,Hu, X.,Jadhav, A.,Maloney, D.J.,Hall, M.D.,Simeonov, A.,Fu, H.,Vertino, P.M.,Yan, Q.,Cheng, X.
Insights into the Action of Inhibitor Enantiomers against Histone Lysine Demethylase 5A.
J. Med. Chem., 61:3193-3208, 2018

PubMed Abstract: Isomers of chiral drugs can exhibit marked differences in biological activities. We studied the binding and inhibitory activities of 12 compounds against KDM5A. Among them are two pairs of enantiomers representing two distinct inhibitor chemotypes, namely, ( R)- and ( S)-2-((2-chlorophenyl)(2-(piperidin-1-yl)ethoxy)methyl)-1 H-pyrrolo[3,2- b]pyridine-7-carboxylic acid (compounds N51 and N52) and ( R) - and ( S) -N-(1-(3-isopropyl-1 H-pyrazole-5-carbonyl)pyrrolidin-3-yl)cyclopropanecarboxamide (compounds N54 and N55). In vitro, the S enantiomer of the N51/N52 pair (N52) and the R enantiomer of the N54/N55 pair (N54) exhibited about 4- to 5-fold greater binding affinity. The more potent enzyme inhibition of KDM5A by the R-isoform for the cell-permeable N54/N55 pair translated to differences in growth inhibitory activity. We determined structures of the KDM5A catalytic domain in complex with all 12 inhibitors, which revealed the interactions (or lack thereof) responsible for the differences in binding affinity. These results provide insights to guide improvements in binding potency and avenues for development of cell permeable inhibitors of the KDM5 family.

PubMed: 29537847
DOI: 10.1021/acs.jmedchem.8b00261

Experimental method

X-RAY DIFFRACTION (2.047 Å)