6tyl: Difference between revisions
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<StructureSection load='6tyl' size='340' side='right'caption='[[6tyl]], [[Resolution|resolution]] 3.30Å' scene=''> | <StructureSection load='6tyl' size='340' side='right'caption='[[6tyl]], [[Resolution|resolution]] 3.30Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6tyl]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[6tyl]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Lama_glama Lama glama] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TYL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TYL FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.3Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</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=6tyl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tyl OCA], [https://pdbe.org/6tyl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tyl RCSB], [https://www.ebi.ac.uk/pdbsum/6tyl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tyl ProSAT]</span></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=6tyl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tyl OCA], [https://pdbe.org/6tyl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tyl RCSB], [https://www.ebi.ac.uk/pdbsum/6tyl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tyl ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/B1H241_RAT B1H241_RAT] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Lama glama]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: McClelland | [[Category: Rattus norvegicus]] | ||
[[Category: Mou | [[Category: McClelland L]] | ||
[[Category: Sprang | [[Category: Mou TC]] | ||
[[Category: Yates-Hansen | [[Category: Sprang SR]] | ||
[[Category: Yates-Hansen C]] | |||
Revision as of 10:40, 11 October 2023
Crystal structure of mammalian Ric-8A:Galpha(i):nanobody complexCrystal structure of mammalian Ric-8A:Galpha(i):nanobody complex
Structural highlights
FunctionPublication Abstract from PubMedRic-8A is a cytosolic Guanine Nucleotide exchange Factor (GEF) that activates heterotrimeric G protein alpha subunits (Galpha) and serves as an essential Galpha chaperone. Mechanisms by which Ric-8A catalyzes these activities, which are stimulated by Casein Kinase II phosphorylation, are unknown. We report the structure of the nanobody-stabilized complex of nucleotide-free Galpha bound to phosphorylated Ric-8A at near atomic resolution by cryo-electron microscopy and X-ray crystallography. The mechanism of Ric-8A GEF activity differs considerably from that employed by G protein-coupled receptors at the plasma membrane. Ric-8A engages a specific conformation of Galpha at multiple interfaces to form a complex that is stabilized by phosphorylation within a Ric-8A segment that connects two Galpha binding sites. The C-terminus of Galpha is ejected from its beta sheet core, thereby dismantling the GDP binding site. Ric-8A binds to the exposed Galpha beta sheet and switch II to stabilize the nucleotide-free state of Galpha. Structure of the G protein chaperone and guanine nucleotide exchange factor Ric-8A bound to Galphai1.,McClelland LJ, Zhang K, Mou TC, Johnston J, Yates-Hansen C, Li S, Thomas CJ, Doukov TI, Triest S, Wohlkonig A, Tall GG, Steyaert J, Chiu W, Sprang SR Nat Commun. 2020 Feb 26;11(1):1077. doi: 10.1038/s41467-020-14943-4. PMID:32103024[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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