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Novel human G-protein-coupled receptors
William B Vanti1, Tuan Nguyen, Regina Cheng
1Department of Pharmacology, Medical Sciences Building, Room 4352, University of Toronto, 1 King's College Circle, Toronto, Ont, Canada M5S 1A8.
Summary
Seven new human orphan G-protein-coupled receptors (oGPCRs) were discovered using genomic database searches. These novel oGPCRs offer new targets for drug discovery and understanding signal transduction pathways.
Area of Science:
- Genomics
- Molecular Biology
- Pharmacology
Background:
- G-protein-coupled receptors (GPCRs) are crucial for signal transduction and are key targets for drug development.
- Orphan GPCRs (oGPCRs) represent a significant area for discovering novel receptor-ligand interactions.
Purpose of the Study:
- To identify and characterize novel human orphan G-protein-coupled receptor (oGPCR) genes.
- To lay the groundwork for discovering endogenous and pharmacological ligands for these new receptors.
Main Methods:
- Customized searches of GenBank genomic databases using known GPCR sequences.
- Sequence analysis to identify novel GPCR-encoding genes.
- Detection of gene transcripts in various human tissues.
Main Results:
- Discovery of seven novel human genes encoding oGPCRs.
- Identification of two distinct groups of oGPCRs based on sequence homology: GPR133-GPR137 (related to PSGR) and GPR138-GPR139 (odorant-like).
- Detection of GPR133-GPR137 transcripts in multiple Central Nervous System (CNS) tissues.
Conclusions:
- The identified novel oGPCRs represent valuable new targets for pharmacological research.
- Further investigation is needed to elucidate the function and ligand interactions of these odorant-like GPCRs, particularly in non-olfactory tissues.