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| <StructureSection load='7pd4' size='340' side='right'caption='[[7pd4]], [[Resolution|resolution]] 4.90Å' scene=''> | | <StructureSection load='7pd4' size='340' side='right'caption='[[7pd4]], [[Resolution|resolution]] 4.90Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[7pd4]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PD4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PD4 FirstGlance]. <br> | | <table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PD4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PD4 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=7pd4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pd4 OCA], [https://pdbe.org/7pd4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pd4 RCSB], [https://www.ebi.ac.uk/pdbsum/7pd4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pd4 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]] 4.9Å</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=7pd4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pd4 OCA], [https://pdbe.org/7pd4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pd4 RCSB], [https://www.ebi.ac.uk/pdbsum/7pd4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pd4 ProSAT]</span></td></tr> |
| </table> | | </table> |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| Adenylyl cyclase 9 (AC9) is a membrane-bound enzyme that converts ATP into cAMP. The enzyme is weakly activated by forskolin, fully activated by the G protein Galphas subunit and is autoinhibited by the AC9 C-terminus. Although our recent structural studies of the AC9-Galphas complex provided the framework for understanding AC9 autoinhibition, the conformational changes that AC9 undergoes in response to activator binding remains poorly understood. Here, we present the cryo-EM structures of AC9 in several distinct states: (i) AC9 bound to a nucleotide inhibitor MANT-GTP, (ii) bound to an artificial activator (DARPin C4) and MANT-GTP, (iii) bound to DARPin C4 and a nucleotide analogue ATPalphaS, (iv) bound to Galphas and MANT-GTP. The artificial activator DARPin C4 partially activates AC9 by binding at a site that overlaps with the Galphas binding site. Together with the previously observed occluded and forskolin-bound conformations, structural comparisons of AC9 in the four conformations described here show that secondary structure rearrangements in the region surrounding the forskolin binding site are essential for AC9 activation.
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| Structural basis of adenylyl cyclase 9 activation.,Qi C, Lavriha P, Mehta V, Khanppnavar B, Mohammed I, Li Y, Lazaratos M, Schaefer JV, Dreier B, Pluckthun A, Bondar AN, Dessauer CW, Korkhov VM Nat Commun. 2022 Feb 24;13(1):1045. doi: 10.1038/s41467-022-28685-y. PMID:35210418<ref>PMID:35210418</ref>
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| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| </div>
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| <div class="pdbe-citations 7pd4" style="background-color:#fffaf0;"></div>
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| == References ==
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| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
| [[Category: Large Structures]] | | [[Category: Large Structures]] |
| [[Category: Korkhov, V M]] | | [[Category: Korkhov VM]] |
| [[Category: Qi, C]] | | [[Category: Qi C]] |
| [[Category: Adenylyl cyclase]]
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| [[Category: Membrane protein]]
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| [[Category: Signaling protein]]
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| [[Category: Signalling transduction]]
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