PMID- 8602223 OWN - NLM STAT- MEDLINE DCOM- 19960503 LR - 20091119 IS - 0028-0836 (Print) IS - 0028-0836 (Linking) VI - 379 IP - 6567 DP - 1996 Feb 22 TI - Inhibition of G-protein-mediated MAP kinase activation by a new mammalian gene family. PG - 742-6 AB - A general property of signal transduction pathways is that prolonged stimulation decreases responsiveness, a phenomenon termed desensitization. Yeast cells stimulated with mating pheromone activate a heterotrimeric G-protein-linked, MAP-kinase-dependent signalling pathway that induces G1-phase cell-cycle arrest and morphological differentiation (reviewed in refs 1, 2). Eventually the cells desensitize to pheromone and resume growth. Genetic studies have demonstrated the relative importance of a desensitization mechanism that uses the SST2 gene product, Sst2p. Here we identify a mammalian gene family termed RGS (for regulator of G-protein signalling) that encodes structural and functional homologues of Sst2p. Introduction of RGS family members into yeast blunts signal transduction through the pheromone-response pathway. Like SST2 (refs 8-10), they negatively regulate this pathway at a point upstream or at the level of the G protein. The RGS family members also markedly impair MAP kinase activation by mammalian G-protein-linked receptors, indicating the existence and importance of an SST2-like desensitization mechanism in mammalian cells. FAU - Druey, K M AU - Druey KM AD - Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-1876, USA. FAU - Blumer, K J AU - Blumer KJ FAU - Kang, V H AU - Kang VH FAU - Kehrl, J H AU - Kehrl JH LA - eng SI - GENBANK/U27655 SI - GENBANK/U27767 SI - GENBANK/U27768 PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Nature JT - Nature JID - 0410462 RN - 0 (Antigens, CD) RN - 0 (DNA Probes) RN - 0 (Fungal Proteins) RN - 0 (GTPase-Activating Proteins) RN - 0 (Pheromones) RN - 0 (Proteins) RN - 0 (RGS Proteins) RN - 0 (RGS3 protein, human) RN - 0 (Receptors, Interleukin) RN - 0 (Receptors, Interleukin-8A) RN - 0 (Recombinant Proteins) RN - 0 (Repressor Proteins) RN - 0 (Rgs3 protein, mouse) RN - 0 (Rgs3 protein, rat) RN - 0 (SST2 protein, S cerevisiae) RN - 0 (Saccharomyces cerevisiae Proteins) RN - 175335-35-0 (RGS4 protein) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 3.6.1.- (GTP-Binding Proteins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Antigens, CD/metabolism MH - Base Sequence MH - Calcium-Calmodulin-Dependent Protein Kinases/*antagonists & inhibitors/metabolism MH - Cell Line MH - DNA Probes MH - Enzyme Activation MH - Fungal Proteins/genetics MH - GTP-Binding Proteins/antagonists & inhibitors/*metabolism MH - *GTPase-Activating Proteins MH - Humans MH - Mitogen-Activated Protein Kinase 3 MH - *Mitogen-Activated Protein Kinases MH - Molecular Sequence Data MH - *Multigene Family MH - Pheromones/metabolism MH - Proteins/genetics/*metabolism MH - *RGS Proteins MH - Rats MH - Receptors, Interleukin/metabolism MH - Receptors, Interleukin-8A MH - Recombinant Proteins/metabolism MH - *Repressor Proteins MH - *Saccharomyces cerevisiae Proteins MH - Sequence Alignment MH - Signal Transduction EDAT- 1996/02/22 00:00 MHDA- 1996/02/22 00:01 CRDT- 1996/02/22 00:00 PHST- 1996/02/22 00:00 [pubmed] PHST- 1996/02/22 00:01 [medline] PHST- 1996/02/22 00:00 [entrez] AID - 10.1038/379742a0 [doi] PST - ppublish SO - Nature. 1996 Feb 22;379(6567):742-6. doi: 10.1038/379742a0.