7xp5
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Cryo-EM structure of a class T GPCR in ligand-free state== | |
| + | <StructureSection load='7xp5' size='340' side='right'caption='[[7xp5]], [[Resolution|resolution]] 3.08Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[7xp5]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Acetivibrio_thermocellus Acetivibrio thermocellus] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7XP5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7XP5 FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.08Å</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7xp5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7xp5 OCA], [https://pdbe.org/7xp5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7xp5 RCSB], [https://www.ebi.ac.uk/pdbsum/7xp5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7xp5 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/T2R46_HUMAN T2R46_HUMAN] Receptor that may play a role in the perception of bitterness and is gustducin-linked. May play a role in sensing the chemical composition of the gastrointestinal content. The activity of this receptor may stimulate alpha gustducin, mediate PLC-beta-2 activation and lead to the gating of TRPM5 (By similarity). In airway epithelial cells, binding of bitter compounds increases the intracellular calcium ion concentration and stimulates ciliary beat frequency (By similarity).[https://www.uniprot.org/uniprot/GUNH_ACET2 GUNH_ACET2] This enzyme catalyzes the endohydrolysis of 1,4-beta-glucosidic linkages in cellulose, lichenin and cereal beta-D-glucans. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Taste sensing is a sophisticated chemosensory process, and bitter taste perception is mediated by type 2 taste receptors (TAS2Rs), or class T G protein-coupled receptors. Understanding the detailed molecular mechanisms behind taste sensation is hindered by a lack of experimental receptor structures. Here, we report the cryo-electron microscopy structures of human TAS2R46 complexed with chimeric mini-G protein gustducin, in both strychnine-bound and apo forms. Several features of TAS2R46 are disclosed, including distinct receptor structures that compare with known GPCRs, a new "toggle switch," activation-related motifs, and precoupling with mini-G protein gustducin. Furthermore, the dynamic extracellular and more-static intracellular parts of TAS2R46 suggest possible diverse ligand-recognition and activation processes. This study provides a basis for further exploration of other bitter taste receptors and their therapeutic applications. | ||
| - | + | Structural basis for strychnine activation of human bitter taste receptor TAS2R46.,Xu W, Wu L, Liu S, Liu X, Cao X, Zhou C, Zhang J, Fu Y, Guo Y, Wu Y, Tan Q, Wang L, Liu J, Jiang L, Fan Z, Pei Y, Yu J, Cheng J, Zhao S, Hao X, Liu ZJ, Hua T Science. 2022 Sep 16;377(6612):1298-1304. doi: 10.1126/science.abo1633. Epub 2022 , Sep 15. PMID:36108005<ref>PMID:36108005</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 7xp5" style="background-color:#fffaf0;"></div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[Transducin 3D structures|Transducin 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Acetivibrio thermocellus]] | ||
| + | [[Category: Homo sapiens]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Hua T]] | ||
| + | [[Category: Liu ZJ]] | ||
| + | [[Category: Wu LJ]] | ||
| + | [[Category: Xu WX]] | ||
Current revision
Cryo-EM structure of a class T GPCR in ligand-free state
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