Joseph. W. Lynch, Lucia G. Sivilotti, Trevor G. Smart
{"title":"Glycine receptors in GtoPdb v.2023.1","authors":"Joseph. W. Lynch, Lucia G. Sivilotti, Trevor G. Smart","doi":"10.2218/gtopdb/f73/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f73/2023.1","url":null,"abstract":"The inhibitory glycine receptor (nomenclature as agreed by the NC-IUPHAR Subcommittee on Glycine Receptors) is a member of the Cys-loop superfamily of transmitter-gated ion channels that includes the GABAA, nicotinic acetylcholine and 5-HT3 receptors and Zn2+- activated channels. The glycine receptor is expressed either as a homo-pentamer of α subunits, or a complex of 4α and 1β subunits [131], that contains an intrinsic anion channel. Four differentially expressed isoforms of the α-subunit (α1-α4) and one variant of the β-subunit (β1, GLRB, P48167) have been identified by genomic and cDNA cloning. Further diversity originates from alternative splicing of the primary gene transcripts for α1 (α1INS and α1del), α2 (α2A and α2B), α3 (α3S and α3L) and β (βΔ7) subunits and by mRNA editing of the α2 and α3 subunit [20, 84, 94]. Both α2 splicing and α3 mRNA editing can produce subunits (i.e., α2B and α3P185L) with enhanced agonist sensitivity. Predominantly, the adult form of the receptor contains α1 (or α3) and β subunits whereas the immature form is mostly composed of only α2 subunits [79]. The α4 subunit is a pseudogene in humans [66]. High resolution molecular structures are available for α1 homomeric, α3 homomeric, and αβ hteromeric receptors in a variety of ligand-induced conformations [19, 129, 19, 48, 49, 50]. As in other Cys-loop receptors, the orthosteric binding site for agonists and the competitive antagonist strychnine is formed at the interfaces between the subunits’ extracellular domains. Inclusion of the β-subunit in the pentameric glycine receptor contributes to agonist binding, reduces single channel conductance and alters pharmacology. The β-subunit also anchors the receptor, via an amphipathic sequence within the large intracellular loop region, to gephyrin. This a cytoskeletal attachment protein that binds to a number of subsynaptic proteins involved in cytoskeletal structure and thus clusters and anchors hetero-oligomeric receptors to the synapse [55, 89]. G protein βγ subunits enhance the open state probability of native and recombinant glycine receptors by association with domains within the large intracellular loop [125, 124]. Intracellular chloride concentration modulates the kinetics of native and recombinant glycine receptors [97]. Intracellular Ca2+ appears to increase native and recombinant glycine receptor affinity, prolonging channel open events, by a mechanism that does not involve phosphorylation [26]. Extracellular Zn2+ potentiates GlyR function at nanomolar concentrations [87]. and causes inhibition at higher micromolar concentrations (17).","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135018452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lucie Clapp, Mark Giembycz, Akos Heinemann, Robert L. Jones, Shuh Narumiya, Xavier Norel, Yukihiko Sugimoto, David F. Woodward, Chengcan Yao
{"title":"Prostanoid receptors in GtoPdb v.2023.1","authors":"Lucie Clapp, Mark Giembycz, Akos Heinemann, Robert L. Jones, Shuh Narumiya, Xavier Norel, Yukihiko Sugimoto, David F. Woodward, Chengcan Yao","doi":"10.2218/gtopdb/f58/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f58/2023.1","url":null,"abstract":"Prostanoid receptors (nomenclature as agreed by the NC-IUPHAR Subcommittee on Prostanoid Receptors [701]) are activated by the endogenous ligands prostaglandins PGD2, PGE1, PGE2 , PGF2α, PGH2, prostacyclin [PGI2] and thromboxane A2. Differences and similarities between human and rodent prostanoid receptor orthologues, and their specific roles in pathophysiologic conditions are reviewed in [452]. Measurement of the potency of PGI2 and thromboxane A2 is hampered by their instability in physiological salt solution; they are often replaced by cicaprost and U46619, respectively, in receptor characterization studies.","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135018455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Bagnol, T. Bonner, Myrna Carlebur, A. Davenport, S. Foord, S. Fukusumi, R. Granata, D. Larhammar, J. Leprince, J. Maguire, S. Primeaux, H. Vaudry
{"title":"QRFP receptor in GtoPdb v.2023.1","authors":"D. Bagnol, T. Bonner, Myrna Carlebur, A. Davenport, S. Foord, S. Fukusumi, R. Granata, D. Larhammar, J. Leprince, J. Maguire, S. Primeaux, H. Vaudry","doi":"10.2218/gtopdb/f54/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f54/2023.1","url":null,"abstract":"The human gene encoding the QRFP receptor (nomenclature as agreed by the NC-IUPHAR Subcommittee on the QRFP receptor [19]; QRFPR, formerly known as the Peptide P518 receptor), previously designated as an orphan GPCR receptor was identified in 2001 by Lee et al. from a hypothalamus cDNA library [17]. However, the reported cDNA (AF411117) is a chimera with bases 1-127 derived from chromosome 1 and bases 155-1368 derived from chromosome 4. When corrected, QRFPR (also referred to as SP9155 or AQ27) encodes a 431 amino acid protein that shares sequence similarities in the transmembrane spanning regions with other peptide receptors. These include neuropeptide FF2 (38%), neuropeptide Y2 (37%) and galanin Gal1 (35%) receptors. QRFP receptor was identified as a Gs-coupled GPCR [6, 14] that's activated by the endogenous peptides QRFP43 (43RFa) and QRFP26 (26RFa) [6, 14, 11]. However, Gq- and Gi/o-mediated signaling was also reported [11, 25]. Two naturally occurring mutations in the human QRFP receptor lead to distinct and opposite 26RFa-evoked signaling bias [20].","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80712778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lanosterol biosynthesis pathway in GtoPdb v.2023.1","authors":"H. E. Benson","doi":"10.2218/gtopdb/f104/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f104/2023.1","url":null,"abstract":"Lanosterol is a precursor for cholesterol, which is synthesized primarily in the liver in a pathway often described as the mevalonate or HMG-CoA reductase pathway. The first two steps (formation of acetoacetyl CoA and the mitochondrial generation of (S)-3-hydroxy-3-methylglutaryl-CoA) are also associated with oxidation of fatty acids.","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73150220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Hills, S. Ishii, S. Jancar, T. McIntyre, E. Ninio, Chris O'Neill, Francisco Jose Oliveira Rios, J. Travers, M. Whittaker
{"title":"Platelet-activating factor receptor in GtoPdb v.2023.1","authors":"R. Hills, S. Ishii, S. Jancar, T. McIntyre, E. Ninio, Chris O'Neill, Francisco Jose Oliveira Rios, J. Travers, M. Whittaker","doi":"10.2218/gtopdb/f55/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f55/2023.1","url":null,"abstract":"Platelet-activating factor (PAF, 1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine) is an ether phospholipid mediator associated with platelet coagulation, but also subserves inflammatory roles. The PAF receptor (provisional nomenclature recommended by NC-IUPHAR [38]) is activated by PAF and other suggested endogenous ligands are oxidized phosphatidylcholine [74] and lysophosphatidylcholine [98]. It may also be activated by bacterial lipopolysaccharide [91].","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78101756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"SLC1 family of amino acid transporters in GtoPdb v.2023.1","authors":"P. Beart","doi":"10.2218/gtopdb/f139/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f139/2023.1","url":null,"abstract":"The SLC1 family of sodium dependent transporters includes the plasma membrane located glutamate transporters and the neutral amino acid transporters ASCT1 and ASCT2 [3, 52, 39, 40, 9].","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83644862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"GPR18, GPR55 and GPR119 in GtoPdb v.2023.1","authors":"Stephen P. H. Alexander, A. Irving","doi":"10.2218/gtopdb/f114/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f114/2023.1","url":null,"abstract":"GPR18, GPR55 and GPR119 (provisional nomenclature), although showing little structural similarity to CB1 and CB2 cannabinoid receptors, respond to endogenous agents analogous to the endogenous cannabinoid ligands, as well as some natural/synthetic cannabinoid receptor ligands [104]. Although there are multiple reports to indicate that GPR18, GPR55 and GPR119 can be activated in vitro by N-arachidonoylglycine, lysophosphatidylinositol and N-oleoylethanolamide, respectively, there is a lack of evidence for activation by these lipid messengers in vivo. As such, therefore, these receptors retain their orphan status.","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"668 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76856631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Bonner, A. Davenport, R. Hills, J. Maguire, Edward M. Rosser
{"title":"Bile acid receptor in GtoPdb v.2023.1","authors":"T. Bonner, A. Davenport, R. Hills, J. Maguire, Edward M. Rosser","doi":"10.2218/gtopdb/f8/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f8/2023.1","url":null,"abstract":"The bile acid receptor (GPBA) responds to bile acids produced during the liver metabolism of cholesterol. Selective agonists are promising drugs for the treatment of metabolic disorders, such as type II diabetes, obesity and atherosclerosis.","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84326359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"3.6.5.2 Small monomeric GTPases in GtoPdb v.2023.1","authors":"E. Faccenda","doi":"10.2218/gtopdb/f896/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f896/2023.1","url":null,"abstract":"Small G-proteins, are a family of hydrolase enzymes that can bind and hydrolyze guanosine triphosphate (GTP). They are a type of G-protein found in the cytosol that are homologous to the alpha subunit of heterotrimeric G-proteins, but unlike the alpha subunit of G proteins, a small GTPase can function independently as a hydrolase enzyme to bind to and hydrolyze a guanosine triphosphate (GTP) to form guanosine diphosphate (GDP). The best-known members are the Ras GTPases and hence they are sometimes called Ras subfamily GTPases.","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86696538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Bäck, C. Brink, N. Chiang, S. Dahlén, G. Dent, J. Drazen, Jilly F. Evans, D. Hay, Motonao Nakamura, W. Powell, J. Rokach, G. Rovati, C. Serhan, Takao Shimizu, Mohib Uddin, T. Yokomizo
{"title":"Leukotriene receptors in GtoPdb v.2023.1","authors":"M. Bäck, C. Brink, N. Chiang, S. Dahlén, G. Dent, J. Drazen, Jilly F. Evans, D. Hay, Motonao Nakamura, W. Powell, J. Rokach, G. Rovati, C. Serhan, Takao Shimizu, Mohib Uddin, T. Yokomizo","doi":"10.2218/gtopdb/f35/2023.1","DOIUrl":"https://doi.org/10.2218/gtopdb/f35/2023.1","url":null,"abstract":"The leukotriene receptors (nomenclature as agreed by the NC-IUPHAR subcommittee on Leukotriene Receptors [35, 38]) are activated by the endogenous ligands leukotrienes (LT), synthesized from lipoxygenase metabolism of arachidonic acid. The human BLT1 receptor is the high affinity LTB4 receptor whereas the BLT2 receptor in addition to being a low-affinity LTB4 receptor also binds several other lipoxygenase-products, such as 12S-HETE, 12S-HPETE, 15S-HETE, and the thromboxane synthase product 12-hydroxyheptadecatrienoic acid. The BLT receptors mediate chemotaxis and immunomodulation in several leukocyte populations and are in addition expressed on non-myeloid cells, such as vascular smooth muscle and endothelial cells. In addition to BLT receptors, LTB4 has been reported to bind to the peroxisome proliferator activated receptor (PPAR) α [201] and the vanilloid TRPV1 ligand-gated nonselective cation channel [223]. The crystal structure of the BLT1 receptor was initially determined in complex with selective antagonists [141, 231] and has recently been extended to the cryo-electron microscopy structure of LTB4-bound human BLT1 receptor at 2.91 Å resolution [389]. The receptors for the cysteinyl-leukotrienes (i.e. LTC4, LTD4 and LTE4) are termed CysLT1 and CysLT2 and exhibit distinct expression patterns in human tissues, mediating for example smooth muscle cell contraction, regulation of vascular permeability, and leukocyte activation. Quite recently, the the crystal structures of both receptors have been solved, the CysLT1 in complex with zafirlukast and pranlukast [203] and the CysLT2 in complex with three dual CysLT1/CysLT2 antagonists [122]. There is also evidence in the literature for additional CysLT receptor subtypes, derived from functional in vitro studies, radioligand binding and in mice lacking both CysLT1 and CysLT2 receptors [38]. Cysteinyl-leukotrienes have also been suggested to signal through the P2Y12 receptor [99, 251, 280], GPR17 [60] and GPR99 [173].","PeriodicalId":14617,"journal":{"name":"IUPHAR/BPS Guide to Pharmacology CITE","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89953896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}