Human S31 serotonin receptor clone encodes a 5-hydroxytryptamine1E-like serotonin receptor

Mol Pharmacol. 1993 Mar;43(3):412-8.


We reported recently the molecular cloning of a genomic fragment, designated S31, that has an open reading frame of 1095 nucleotides, encoding a protein of 365 amino acids. Amino acid similarity analysis suggested that the S31 protein could be a guanine nucleotide-binding protein-coupled receptor pertaining to the serotonin receptor subfamily. Expression of the S31 open reading frame in murine L cells confirmed this, because it led to the appearance of serotonin-mediated inhibition of adenylyl cyclase activity, which was absent in the recipient L cells. We now report some aspects of the pharmacological profile of this receptor. We found that the relative potencies with which 5-hydroxytryptamine, 5-carboxamidotryptamine, methysergide, ergotamine, 8-hydroxydipropylaminotetralin, and trifluoromethylphenylpiperazine promote inhibition of adenylyl cyclase are as follows: 5-hydroxytryptamine >> methysergide >> ergotamine >> trifluoromethylphenylpiperazine > or = 8-hydroxydipropylaminotetralin > 5-carboxyamidotryptamine. This corresponds to the rank order of potencies assigned for these drugs for the 1E subtype of serotonin receptors discovered by Leonhardt and collaborators in human brain [J. Neurochem. 53:465-471 (1989)].

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adenylyl Cyclase Inhibitors
  • Adenylyl Cyclases / metabolism
  • Animals
  • Cloning, Molecular
  • Humans
  • L Cells
  • Methiothepin / pharmacology
  • Mice
  • Receptors, Serotonin / chemistry
  • Receptors, Serotonin / genetics
  • Receptors, Serotonin / metabolism*
  • Serotonin / pharmacology
  • Serotonin Antagonists / pharmacology
  • Serotonin Receptor Agonists / pharmacology


  • Adenylyl Cyclase Inhibitors
  • Receptors, Serotonin
  • Serotonin Antagonists
  • Serotonin Receptor Agonists
  • Serotonin
  • Methiothepin
  • Adenylyl Cyclases