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==== | ==Structure of the alpha2A-adrenergic receptor GoA signaling complex bound to brimonidine== | ||
<StructureSection load='7ej8' size='340' side='right'caption='[[7ej8]]' scene=''> | <StructureSection load='7ej8' size='340' side='right'caption='[[7ej8]], [[Resolution|resolution]] 3.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br> | <table><tr><td colspan='2'>[[7ej8]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7EJ8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7EJ8 FirstGlance]. <br> | ||
</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=7ej8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ej8 OCA], [https://pdbe.org/7ej8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ej8 RCSB], [https://www.ebi.ac.uk/pdbsum/7ej8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ej8 ProSAT]</span></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=J59:5-bromanyl-~{N}-(4,5-dihydro-1~{H}-imidazol-2-yl)quinoxalin-6-amine'>J59</scene></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=7ej8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ej8 OCA], [https://pdbe.org/7ej8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ej8 RCSB], [https://www.ebi.ac.uk/pdbsum/7ej8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ej8 ProSAT]</span></td></tr> | |||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The alpha(2A) adrenergic receptor (alpha(2A)AR) is a G protein (heterotrimeric guanine nucleotide-binding protein)-coupled receptor that mediates important physiological functions in response to the endogenous neurotransmitters norepinephrine and epinephrine, as well as numerous chemically distinct drugs. However, the molecular mechanisms of drug actions remain poorly understood. Here, we report the cryo-electron microscopy structures of the human alpha(2A)AR-GoA complex bound to norepinephrine and three imidazoline derivatives (brimonidine, dexmedetomidine, and oxymetazoline). Together with mutagenesis and functional data, these structures provide important insights into the molecular basis of ligand recognition, activation, and signaling at the alpha(2A)AR. Further structural analyses uncover different molecular determinants between alpha(2A)AR and betaARs for recognition of norepinephrine and key regions that determine the G protein coupling selectivity. Overall, our studies provide a framework for understanding the signal transduction of the adrenergic system at the atomic level, which will facilitate rational structure-based discovery of safer and more effective medications for alpha(2A)AR. | |||
Structural insights into ligand recognition, activation, and signaling of the alpha(2A) adrenergic receptor.,Xu J, Cao S, Hubner H, Weikert D, Chen G, Lu Q, Yuan D, Gmeiner P, Liu Z, Du Y Sci Adv. 2022 Mar 4;8(9):eabj5347. doi: 10.1126/sciadv.abj5347. Epub 2022 Mar 4. PMID:35245122<ref>PMID:35245122</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7ej8" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Adrenergic receptor 3D structures|Adrenergic receptor 3D structures]] | |||
*[[Transducin 3D structures|Transducin 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Z | [[Category: Mus musculus]] | ||
[[Category: Cao S]] | |||
[[Category: Du Y]] | |||
[[Category: Liu Z]] | |||
[[Category: Xu J]] | |||
Latest revision as of 11:41, 17 October 2024
Structure of the alpha2A-adrenergic receptor GoA signaling complex bound to brimonidineStructure of the alpha2A-adrenergic receptor GoA signaling complex bound to brimonidine
Structural highlights
Publication Abstract from PubMedThe alpha(2A) adrenergic receptor (alpha(2A)AR) is a G protein (heterotrimeric guanine nucleotide-binding protein)-coupled receptor that mediates important physiological functions in response to the endogenous neurotransmitters norepinephrine and epinephrine, as well as numerous chemically distinct drugs. However, the molecular mechanisms of drug actions remain poorly understood. Here, we report the cryo-electron microscopy structures of the human alpha(2A)AR-GoA complex bound to norepinephrine and three imidazoline derivatives (brimonidine, dexmedetomidine, and oxymetazoline). Together with mutagenesis and functional data, these structures provide important insights into the molecular basis of ligand recognition, activation, and signaling at the alpha(2A)AR. Further structural analyses uncover different molecular determinants between alpha(2A)AR and betaARs for recognition of norepinephrine and key regions that determine the G protein coupling selectivity. Overall, our studies provide a framework for understanding the signal transduction of the adrenergic system at the atomic level, which will facilitate rational structure-based discovery of safer and more effective medications for alpha(2A)AR. Structural insights into ligand recognition, activation, and signaling of the alpha(2A) adrenergic receptor.,Xu J, Cao S, Hubner H, Weikert D, Chen G, Lu Q, Yuan D, Gmeiner P, Liu Z, Du Y Sci Adv. 2022 Mar 4;8(9):eabj5347. doi: 10.1126/sciadv.abj5347. Epub 2022 Mar 4. PMID:35245122[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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