Identification of a novel histone H2A mono-ubiquitination-inhibiting cell-active small molecule

Bioorg Med Chem Lett. 2024 Jun 1:105:129759. doi: 10.1016/j.bmcl.2024.129759. Epub 2024 Apr 16.

Abstract

Histone H2A mono-ubiquitination plays important roles in epigenetic gene expression and is also involved in tumorigenesis. Small molecules controlling H2A ubiquitination are of interest as potential chemical tools and anticancer drugs. To identify novel small molecule inhibitors of H2A ubiquitination, we synthesized and evaluated several compounds designed based on PRT4165 (1), which is a reported histone ubiquitin ligase RING1A inhibitor. We found that compound 11b strongly inhibited the viability and reduced histone H2A mono-ubiquitination in human osteosarcoma U2OS cells. Therefore, compound 11b is a promising lead compound for the development of H2A histone ubiquitination-inhibiting small molecules.

Keywords: Epigenetics; Histone modification; PRC1; RING1A/B.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology
  • Cell Line, Tumor
  • Cell Survival / drug effects
  • Dose-Response Relationship, Drug
  • Histones* / metabolism
  • Humans
  • Molecular Structure
  • Small Molecule Libraries* / chemical synthesis
  • Small Molecule Libraries* / chemistry
  • Small Molecule Libraries* / pharmacology
  • Structure-Activity Relationship
  • Ubiquitination* / drug effects

Substances

  • Histones
  • Small Molecule Libraries
  • Antineoplastic Agents