Discovery of a First-in-Class Inhibitor of the PRMT5-Substrate Adaptor Interaction.


Journal

Journal of medicinal chemistry
ISSN: 1520-4804
Titre abrégé: J Med Chem
Pays: United States
ID NLM: 9716531

Informations de publication

Date de publication:
12 08 2021
Historique:
pubmed: 4 8 2021
medline: 9 3 2022
entrez: 3 8 2021
Statut: ppublish

Résumé

PRMT5 and its substrate adaptor proteins (SAPs), pICln and Riok1, are synthetic lethal dependencies in MTAP-deleted cancer cells. SAPs share a conserved PRMT5 binding motif (PBM) which mediates binding to a surface of PRMT5 distal to the catalytic site. This interaction is required for methylation of several PRMT5 substrates, including histone and spliceosome complexes. We screened for small molecule inhibitors of the PRMT5-PBM interaction and validated a compound series which binds to the PRMT5-PBM interface and directly inhibits binding of SAPs. Mode of action studies revealed the formation of a covalent bond between a halogenated pyridazinone group and cysteine 278 of PRMT5. Optimization of the starting hit produced a lead compound, BRD0639, which engages the target in cells, disrupts PRMT5-RIOK1 complexes, and reduces substrate methylation. BRD0639 is a first-in-class PBM-competitive inhibitor that can support studies of PBM-dependent PRMT5 activities and the development of novel PRMT5 inhibitors that selectively target these functions.

Identifiants

pubmed: 34342224
doi: 10.1021/acs.jmedchem.1c00507
pmc: PMC9036822
mid: NIHMS1786730
doi:

Substances chimiques

Adaptor Proteins, Signal Transducing 0
Pyridazines 0
PRMT5 protein, human EC 2.1.1.319
Protein-Arginine N-Methyltransferases EC 2.1.1.319

Types de publication

Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

11148-11168

Subventions

Organisme : NCI NIH HHS
ID : R01 CA233626
Pays : United States

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Auteurs

David C McKinney (DC)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Brian J McMillan (BJ)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Matthew J Ranaghan (MJ)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Jamie A Moroco (JA)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Merissa Brousseau (M)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Zachary Mullin-Bernstein (Z)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Meghan O'Keefe (M)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Patrick McCarren (P)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Michael F Mesleh (MF)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Kathleen M Mulvaney (KM)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Foxy Robinson (F)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Ritu Singh (R)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Besnik Bajrami (B)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Florence F Wagner (FF)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Robert Hilgraf (R)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Martin J Drysdale (MJ)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Arthur J Campbell (AJ)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Adam Skepner (A)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

David E Timm (DE)

Department of Biochemistry, University of Utah, 1390 Presidents Circle, Salt Lake City, Utah 84112, United States.

Dale Porter (D)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

Virendar K Kaushik (VK)

Center for the Development of Therapeutics, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

William R Sellers (WR)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.
Department of Medical Oncology, Dana-Farber Cancer Institute, Department of Medicine, Harvard Medical School, 44 Binney Street, Boston, Massachusetts 02215, United States.

Alessandra Ianari (A)

Cancer Program, The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, United States.

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