Mapping studies of two G protein-coupled receptor genes: an amino acid difference may confer a functional variation between a human and rodent receptor

Biochem Biophys Res Commun. 1994 Dec 30;205(3):1952-8. doi: 10.1006/bbrc.1994.2899.


We recently isolated two orphan human G protein-coupled receptor genes designated GPR1 and GPR6. The gene GPR1 was shown to be transcribed abundantly but only in the hippocampus. Here we report the cloning of the rat GPR1 gene and report the absence of expression in hippocampus, demonstrating a functional variation for this receptor in these two species. The evolutionary history of an important sequence difference in the gene GPR1 in primate and rodent species has been examined. In contrast extensive mapping of gene GPR6 mRNA in rat brain was in keeping with the described distribution in human brain.

Publication types

  • Comparative Study

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Biological Evolution
  • Brain / metabolism
  • Chromosome Mapping
  • DNA / genetics
  • GTP-Binding Proteins / metabolism*
  • Hippocampus / metabolism
  • Humans
  • In Situ Hybridization
  • Molecular Sequence Data
  • Polymerase Chain Reaction
  • Primates
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Rats
  • Receptors, Cell Surface / genetics*
  • Receptors, Cell Surface / metabolism
  • Sequence Homology, Amino Acid
  • Species Specificity
  • Tissue Distribution


  • RNA, Messenger
  • Receptors, Cell Surface
  • DNA
  • GTP-Binding Proteins

Associated data

  • GENBANK/S74702