Fragment library screening reveals remarkable similarities between the G protein-coupled receptor histamine H₄ and the ion channel serotonin 5-HT₃A

Bioorg Med Chem Lett. 2011 Sep 15;21(18):5460-4. doi: 10.1016/j.bmcl.2011.06.123. Epub 2011 Jul 2.

Abstract

A fragment library was screened against the G protein-coupled histamine H(4) receptor (H(4)R) and the ligand-gated ion channel serotonin 5-HT(3A) (5-HT(3A)R). Interestingly, significant overlap was found between H(4)R and 5-HT(3A)R hit sets. The data indicates that dual active H(4)R and 5 HT(3A)R fragments have a higher complexity than the selective compounds which has important implications for chemical genomics approaches. The results of our fragment-based library screening study illustrate similarities in ligand recognition between H(4)R and 5-HT(3A)R and have important consequences for selectivity profiling in ongoing drug discovery efforts on H(4)R and 5-HT(3A)R. The affinity profiles of our fragment screening studies furthermore match the chemical properties of the H(4)R and 5-HT(3A)R binding sites and can be used to define molecular interaction fingerprints to guide the in silico prediction of protein-ligand interactions and structure.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • HEK293 Cells
  • Humans
  • Models, Molecular
  • Molecular Structure
  • Organic Chemicals / chemistry
  • Organic Chemicals / pharmacology*
  • Receptors, Histamine / metabolism*
  • Receptors, Serotonin, 5-HT3 / metabolism*
  • Small Molecule Libraries
  • Structure-Activity Relationship

Substances

  • Organic Chemicals
  • Receptors, Histamine
  • Receptors, Serotonin, 5-HT3
  • Small Molecule Libraries