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Open Forum on Cell Signaling

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Classification Sites

27 November 2001

Nancy R. Gough


The answer to your question depends very much on the type of receptors that you are trying to classify. You might try the sites listed in the ST on the Web section of the STKE. The (Protein Databases section has links to such places as the GPCRDB: Information System for G Protein-Coupled Receptors ( and the NucleaRDB: Information System for Nuclear Receptors ( The Model Organisms section has links to such places as the Mouse Genome Informatics site, which has a browsable ontology ( Another source for information about classification of receptors is the Gene Ontology group (

Hope this gets you started.

Nancy R. Gough, Ph.D. Managing Editor Science's STKE

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Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882