5HT1D receptors are found at low levels in the basal ganglia (globus pallidus, substantia nigra, caudate putamen), the hippocampus, and in the cortex.
Structure
5HT1D receptor is a G protein-coupled receptor that activates an intracellular messenger cascade to produce an inhibitory response by decreasing cellular levels of cAMP. A large intercellular loop between TM-5 and TM-6 is believed to be associated with coupling to a second messenger. Agonists might bind in a manner that utilizes an aspartate residue in TM-3 and residues in the TM-4, TM-5 and TM-6. A human clone containing an intronless open reading frame was found to encode 377 amino acids of the 5HT1D receptor. The gene has been localized on chromosome 1, region 1p34.3-36.3
Ligands
Agonists
Molecular modelling has provided a picture of the agonistic binding site of 5HT1D. The amino acid residues within the receptor binding site region have been identified. This is a valuable guide to design potential 5HT1D receptor agonists.
When sumatriptan binds there is major conformational change in both ligand and receptor in the binding pocket.
↑Hoyer D (2019). "Serotonin receptors nomenclature". In Tricklebank MD, Daly E (eds.). The Serotonin System: History, Neuropharmacology, and Pathology. Academic Press. pp.63–93. doi:10.1016/B978-0-12-813323-1.00004-9. ISBN978-0-12-813323-1.
↑Millan MJ, Marin P, Bockaert J, Mannoury la Cour C (September 2008). "Signaling at G-protein-coupled serotonin receptors: recent advances and future research directions". Trends in Pharmacological Sciences. 29 (9): 454–64. doi:10.1016/j.tips.2008.06.007. PMID18676031.
↑Goadsby PJ (1998). "Serotonin 5-HT1B/1D Receptor Agonists in Migraine: Comparative Pharmacology and Its Therapeutic Implications". CNS Drugs. 10 (4): 271–286. doi:10.2165/00023210-199810040-00005.
↑Bremner DH, Ringan NS, Wishart G (1997). "Modeling of the agonist binding site of serotonin human 5-HT1A, 5-HT1Dα and 5-HT1Dβ receptors". European Journal of Medicinal Chemistry. 32 (1): 59–69. doi:10.1016/S0223-5234(97)84362-0.
↑Glennon RA, Hong SS, Dukat M, Teitler M, Davis K (September 1994). "5-(Nonyloxy)tryptamine: a novel high-affinity 5-HT1D beta serotonin receptor agonist". Journal of Medicinal Chemistry. 37 (18): 2828–2830. doi:10.1021/jm00044a001. PMID8071931.
↑Ward SE, Harrington FP, Gordon LJ, Hopley SC, Scott CM, Watson JM (19 May 2005). "Discovery of the first potent, selective 5-hydroxytryptamine1D receptor antagonist". Journal of Medicinal Chemistry. 48 (10): 3478–3480. doi:10.1021/jm049039v. PMID15887956.
External links
"5-HT1D". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology.
Hamblin MW, Metcalf MA, McGuffin RW, Karpells S (April 1992). "Molecular cloning and functional characterization of a human 5-HT1B serotonin receptor: a homologue of the rat 5-HT1B receptor with 5-HT1D-like pharmacological specificity". Biochemical and Biophysical Research Communications. 184 (2): 752–759. doi:10.1016/0006-291X(92)90654-4. PMID1315531.
Hamblin MW, Metcalf MA (August 1991). "Primary structure and functional characterization of a human 5-HT1D-type serotonin receptor". Molecular Pharmacology. 40 (2): 143–148. PMID1652050.
Libert F, Passage E, Parmentier M, Simons MJ, Vassart G, Mattei MG (September 1991). "Chromosomal mapping of A1 and A2 adenosine receptors, VIP receptor, and a new subtype of serotonin receptor". Genomics. 11 (1): 225–227. doi:10.1016/0888-7543(91)90125-X. PMID1662665.
Libert F, Parmentier M, Lefort A, Dinsart C, Van Sande J, Maenhaut C, etal. (May 1989). "Selective amplification and cloning of four new members of the G protein-coupled receptor family". Science. 244 (4904): 569–572. Bibcode:1989Sci...244..569L. doi:10.1126/science.2541503. PMID2541503.
Cargill M, Altshuler D, Ireland J, Sklar P, Ardlie K, Patil N, etal. (July 1999). "Characterization of single-nucleotide polymorphisms in coding regions of human genes". Nature Genetics. 22 (3): 231–238. doi:10.1038/10290. PMID10391209. S2CID195213008.
Bergen AW, van den Bree MB, Yeager M, Welch R, Ganjei JK, Haque K, etal. (April 2003). "Candidate genes for anorexia nervosa in the 1p33-36 linkage region: serotonin 1D and delta opioid receptor loci exhibit significant association to anorexia nervosa". Molecular Psychiatry. 8 (4): 397–406. doi:10.1038/sj.mp.4001318. PMID12740597. S2CID22413624.