Thrombin receptor.html

There are three known thrombin receptors termed PAR1, PAR3 and PAR4 (PAR for protease-activated receptor).

These receptors are members of the 7 transmembrane g protein-coupled family of receptors, however, their method of activation is unique. Thrombin, a serine protease, binds to and cleaves the extracellular N-terminal domain of the receptor. A tethered ligand corresponding to the new N-terminus, SFLLRN, is then unmasked, binding to the second extracellular loop of the receptor and activating it.

v • d • e Membrane proteins, receptors: transmembrane receptors

Asialoglycoprotein receptor - Autoreceptors - Biogenic amine receptor - Eicosanoid receptor (Prostaglandin receptor) - G protein-coupled receptor - Immune receptor - N-Acetylglucosamine receptor - Neuropilins - Neurotransmitter receptor - Olfactory receptor - Protease-activated receptor - Purinergic receptor - Transferrin receptor

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) • Neuromedin (B, U (1, 2)) • Neurotensin (1, 2)

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, 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, 172A, 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 • 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

Orphan	GPR (56, 64, 97, 98, 110, 111, 112, 113, 114, 115, 116, 123, 124, 125, 126, 128, 133, 143, 144, 157)

Other	Brain-specific angiogenesis inhibitor (1, 2, 3) • Cadherin (1, 2, 3) • Calcitonin • CALCRL • CD97 • Corticotropin-releasing hormone (1, 2) • EMR (1, 2, 3) • Glucagon (GR, GIPR, GLP1R, GLP2R) • Growth hormone releasing hormone • PACAPR1 • GPR • Latrophilin (1, 2, 3, ELTD1) • Parathyroid hormone (1, 2) • Secretin • Vasoactive intestinal peptide (1, 2)

Class C: Metabotropic
glutamate / pheromone

Taste	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)

Other	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)

Frizzled / Smoothened

Frizzled (1, 2, 3, 4, 5, 6, 7, 8, 9, 10) • Smoothened

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