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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/Buffalo_rat Buffalo rat] and [https://en.wikipedia.org/wiki/Camelus_glama Camelus glama]. 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> | + | <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='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></td></tr> | + | </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='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Ric8a, rCG_48458 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat]), Gnai1, Gnai-1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr> | + | <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/GNAI1_RAT GNAI1_RAT]] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. The G(i) proteins are involved in hormonal regulation of adenylate cyclase: they inhibit the cyclase in response to beta-adrenergic stimuli. The inactive GDP-bound form prevents the association of RGS14 with centrosomes and is required for the translocation of RGS14 from the cytoplasm to the plasma membrane. May play a role in cell division.<ref>PMID:16870394</ref>
| + | [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: Buffalo rat]] | + | [[Category: Lama glama]] |
| - | [[Category: Camelus glama]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: McClelland, L]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Mou, T C]] | + | [[Category: McClelland L]] |
| - | [[Category: Sprang, S R]] | + | [[Category: Mou TC]] |
| - | [[Category: Yates-Hansen, C]] | + | [[Category: Sprang SR]] |
| - | [[Category: G protein]]
| + | [[Category: Yates-Hansen C]] |
| - | [[Category: Gef]]
| + | |
| - | [[Category: Ric-8a]]
| + | |
| - | [[Category: Signaling protein]]
| + | |
| Structural highlights
Function
B1H241_RAT
Publication Abstract from PubMed
Ric-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 Also
References
- ↑ 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. Structure of the G protein chaperone and guanine nucleotide exchange factor Ric-8A bound to Galphai1. Nat Commun. 2020 Feb 26;11(1):1077. doi: 10.1038/s41467-020-14943-4. PMID:32103024 doi:http://dx.doi.org/10.1038/s41467-020-14943-4
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