Identification of pyrimidine derivatives as hSMG-1 inhibitors

Bioorg Med Chem Lett. 2012 Nov 1;22(21):6636-41. doi: 10.1016/j.bmcl.2012.08.107. Epub 2012 Sep 7.

Abstract

hSMG-1 kinase plays a dual role in a highly conserved RNA surveillance pathway termed nonsense-mediated RNA decay (NMD) and in cellular genotoxic stress response. Since deregulation of cellular responses to stress contributes to tumor growth and resistance to chemotherapy, hSMG-1 is a potential target for cancer treatment. From our screening efforts, we have identified pyrimidine derivatives as hSMG-1 kinase inhibitors. We report structure-based optimization of this pan-kinase scaffold to improve its biochemical profile and overall kinome selectivity, including mTOR and CDK, to generate the first reported selective hSMG-1 tool compound.

MeSH terms

  • Binding Sites
  • Crystallography, X-Ray
  • Enzyme Activation / drug effects
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry*
  • Enzyme Inhibitors / pharmacology*
  • Humans
  • Inhibitory Concentration 50
  • Molecular Structure
  • Phosphoinositide-3 Kinase Inhibitors*
  • Protein Serine-Threonine Kinases
  • Pyrimidines / chemical synthesis
  • Pyrimidines / chemistry*
  • Pyrimidines / pharmacology

Substances

  • Enzyme Inhibitors
  • Phosphoinositide-3 Kinase Inhibitors
  • Pyrimidines
  • Protein Serine-Threonine Kinases
  • SMG1 protein, human