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14-September-2008 18:02:44 - receptor family Secretin family of 7 transmembrane receptors Identifiers Symbol 7tm_2 Pfam PF00002 InterPro IPR000832 PROSITE PDOC00559 SCOP 1bl1 OPM family 6 OPM protein 1fjr Available PDB structures: PDB 1bl1 ; 17-30; PDB 1et2 S 184-46 PDB 1et3 S 184-46 Secretin family of 7 transmembrane receptors is a family of evolutionarily related proteins.1 This family is known as Family B, the secretin-receptor family or family 2 of the G-protein-coupled receptors.They have been described in many animal species, but not in plants, fungi or prokaryotes. Three distinct sub-families B1-B3 are recognized. Many secretin receptors are regulated by peptide hormones from the glucagon hormone family. The secretin-like GPCRs include secretin, calcitonin, parathyroid hormone/parathyroid hormone-related peptides and vasoactive intestinal peptide receptors, all of which activate adenylyl cyclase and the phosphatidyl-inositol-calcium pathway. These receptors have 7 transmembrane helices, like rhodopsin-like GPCRs. However,there is no significant sequence identity between these families: the secretin-like receptors thus bear their own unique '7TM' signature. Contents 1 Subfamily B1 2 Subfamily B2 3 Subfamily B3 4 Unclassified subfamilies 5 Unclassified members 6 References Subfamily B1 Subfamily B1 contains classical hormone receptors, such as receptors for secretin and glucagon, that are all involved in cAMP-mediated signalling pathways. Adenylate cyclase-activating type 1 receptor, pituitary IPR002285 ADCYAP1R1 Calcitonin receptor IPR003287 CALCR; CALCRL Corticotropin-releasing hormone receptor IPR003051 CRHR1; CRHR2 Glucagon receptor-related IPR003290 GLP1R; GLP2R; GPCR Growth hormone releasing hormone receptor IPR003288 GHRHR Parathyroid hormone receptor IPR002170 PTHR1; PTHR2 Secretin receptor IPR002144 SCTR Vasoactive intestinal peptide receptor IPR001571 VIPR1; VIPR2 Subfamily B2 Subfamily B2 contains receptors with long extracellular N-termini, such as the leukocyte cell-surface antigen CD97; calcium-independent receptors for latrotoxin such as UniProt O94910, and brain-specific angiogenesis inhibitor receptors such as UniProt O14514 amongst others. Brain-specific angiogenesis inhibitor IPR008077 BAI1; BAI2; BAI3 CD97 antigen IPR003056 CD97 EMR hormone receptor IPR001740 CELSR1; CELSR2; CELSR3; EMR1; EMR2; EMR3; EMR4 Gastric inhibitory polypeptide receptor IPR001749 GCGR; GIPR GPR56 orphan receptor IPR003910 GPR56; GPR64; GPR97; GPR110; GPR111; GPR112; GPR113; GPR114; GPR115; GPR123; GPR125; GPR126; GPR128; GPR133; GPR144; GPR157 Latrophilin receptor IPR003924 ELTD1; LPHN1; LPHN2; LPHN3 Subfamily B3 Subfamily B3 includes Methuselah and other Drosophila proteins. Other than the typical seven-transmembrane region, characteristic structural features include an amino-terminal extracellular domain involved in ligand binding, and an intracellular loop IC3 required for specific G-protein coupling. Diuretic hormone receptor IPR002001 Unclassified subfamilies Ig-hepta receptor IPR008078 GPR116 Unclassified members DREG; HCTR-5; HCTR-6; KPG_003; KPG_006; KPG_008; KPG_009; RESDA1 References ^ Harmar AJ 2001. Family-B G-protein-coupled receptors. Genome Biol. 2 12: REVIEWS3013. doi:10.1186/gb-2001-2-12-reviews3013. PMID 11790261. v d e Transmembrane receptor: G protein-coupled receptors Class A: Rhodopsin like Adrenergic α1 A, B, D, α2 A, B, C, β1, β2, β3 Eicosanoid CysLT 1, 2, LTB4 1, 2, FPRL1, OXE, Prostaglandin DP, EP 1, 2, 3, 4, PGF, Prostacyclin, Thromboxane Neuropeptide B/W 1, 2, FF 1, 2, S, Y 1, 2, 4, 5 Orphan GPR 1, 3, 4, 6, 12, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 31, 32, 33, 34, 35, 37, 39, 42, 44, 45, 50, 52, 55, 61, 62, 63, 65, 68, 75, 77, 78, 79, 82, 83, 84, 85, 87, 88, 92, 101, 103, 119, 120, 132, 135, 139, 141, 142, 146, 148, 149, 150, 151, 152, 153, 160, 161, 162, 171, 172, 173, 174, 176, 177, 182 Purinergics Adenosine A1, A2a, A2b, A3, P2Y, 1, 2, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14 Serotonin all but 5-HT3 5-HT1 A, B, D, E, F, 5-HT2 A, B, C, 5-HT 4, 5A, 6, 7 Other Acetylcholine M1, M2, M3, M4, M5 - Adrenomedullin - Anaphylatoxin C3a, C5a - Angiotensin 1, 2 - Apelin - Bile acid - Bombesin BRS3, GRPR, NMBR - Bradykinin B1, B2 - Cannabinoid CB1, CB2 - Chemokine - Cholecystokinin A, B - Dopamine D1, D2, D3, D4, D5 - EBI2 - Endothelin A, B - Estrogen - Formyl peptide 1, L1, L2 - Free fatty acid 1, 2, 3, 4 - FSH - Galanin 1, 2, 3 - Gonadotropin-releasing hormone 1, 2 - Ghrelin - Histamine H1, H2, H3, H4 - Kisspeptin - Luteinizing hormone/choriogonadotropin - Lysophospholipid 1, 2, 3, 4, 5, 6, 7, 8 - MAS 1, 1L, D, E, F, G, X1, X2, X3, X4 - Melanocortin 1, 2, 3, 4, 5 - MCHR 1, 2 - Melatonin 1A, 1B- Motilin - neuromedin B, U 1, 2 - Neurotensin 1, 2 - Opioid Delta, Kappa, Mu, Nociceptin, but not Sigma - Olfactory - Opsin 3, 4, 5, 1LW, 1MW, 1SW, RGR, RRH - Orexin 1, 2 - Oxytocin - Oxoglutarate - PAF - Prokineticin 1, 2 - Prolactin-releasing peptide - Protease-activated 1, 2, 3, 4 - Relaxin 1, 2, 3, 4 - Somatostatin 1, 2, 3, 4, 5 - SREB - Succinate - TAAR 1, 2, 3, 5, 6, 8, 9 - Tachykinin 1, 2, 3 - Thyrotropin - Thyrotropin-releasing hormone - Urotensin-II - Vasopressin 1A, 1B, 2 Class B: Secretin like Brain-specific angiogenesis inhibitor 1, 2, 3 - Cadherin 1, 2, 3 - Calcitonin - CD97 - Corticotropin-releasing hormone 1, 2 - EMR 1, 2, 3 - Glucagon GR, GIPR, GLP1R, GLP2R - Growth hormone releasing hormone - PACAPR1- GPR 56, 64, 97, 98, 110, 111, 112, 113, 114, 115, 116, 123, 124, 125, 126, 128, 133, 143, 144, 157 - Latrophilin 1, 2, 3, ELTD1 - Parathyroid hormone 1, 2 - Secretin - Vasoactive intestinal peptide 1, 2 Class C: Metabotropic glutamate / pheromone Calcium-sensing receptor - GABA B 1, 2 - Glutamate receptor Metabotropic glutamate 1, 2, 3, 4, 5, 6, 7, 8 - GPRC6A - GPR 156, 158, 179 - RAIG 1, 2, 3, 4 - Taste receptors TAS1R 1, 2, 3 TAS2R 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 16, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50 Frizzled / Smoothened Frizzled 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 - Smoothened Retrieved from http://en..org/wiki/Secretin_receptor_family Categories: Protein domains | Protein families | G protein coupled receptorsHidden category: Protein pages needing a picture Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page This page was last modified on 20 May 2008, at 17:11
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