9O6H | pdb_00009o6h

Experimental Data Snapshot

Starting Model: experimental
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Ligand Structure Quality Assessment

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(2026) J Med Chem 69: 9977-9990

PubMed Abstract:
Protein arginine methyltransferases (PRMTs) are appealing therapeutic targets due to their critical roles in regulating numerous cellular processes and their dysregulation in various diseases. Although SAH-based inhibitors effectively target PRMTs, achieving selectivity across different methyltransferases remains a significant challenge. Herein, we employed a hybrid strategy that incorporates optimal linker length and "T-shape" modifications to enhance inhibitor selectivity. Starting with a selective PRMT7 inhibitor SGC8158 (IC ₅₀ <2.5 nM), we successfully transformed it into a selective PRMT4 inhibitor AK442 (IC ₅₀ = 2.6 nM). This approach highlights the potential of these design strategies to tune inhibitor selectivity, facilitating the development of isoform-specific PRMT inhibitors from existing scaffolds.

Organizational Affiliation

Borch Department of Medicinal Chemistry and Molecular Pharmacology, Institute for Cancer Research, Institute for Drug Discovery, Purdue University, West Lafayette, Indiana 47907, United States.

Macromolecule Content

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone-arginine methyltransferase CARM1	A, B, C, D	331	Homo sapiens	Mutation(s): 0 Gene Names: CARM1, PRMT4 EC: 2.1.1.319
UniProt & NIH Common Fund Data Resources
Find proteins for Q86X55 (Homo sapiens) Explore Q86X55 Go to UniProtKB: Q86X55
PHAROS: Q86X55 GTEx: ENSG00000142453
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q86X55
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Reference Sequence

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
A1B9W (Subject of Investigation/LOI) Query on A1B9W Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain F [auth B] SDF format, chain G [auth C] SDF format, chain H [auth D] MOL2 format, chain E [auth A] MOL2 format, chain F [auth B] MOL2 format, chain G [auth C] MOL2 format, chain H [auth D] mmCIF format, chain E [auth A] mmCIF format, chain F [auth B] mmCIF format, chain G [auth C] mmCIF format, chain H [auth D]	E [auth A], F [auth B], G [auth C], H [auth D]	5'-S-(3-{[(4'-chloro[1,1'-biphenyl]-3-yl)methyl]amino}propyl)-5'-thioadenosine C₂₆ H₂₉ Cl N₆ O₃ S FHYIZIPPSUZZSB-HUBRGWSESA-N		Interactions Focus chain E [auth A] Focus chain F [auth B] Focus chain G [auth C] Focus chain H [auth D] Interactions & Density Focus chain E [auth A] Focus chain F [auth B] Focus chain G [auth C] Focus chain H [auth D]