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| | ==Crystal structure of S. cerevisiae Get3 in the open state in complex with Get1 cytosolic domain== | | ==Crystal structure of S. cerevisiae Get3 in the open state in complex with Get1 cytosolic domain== |
| - | <StructureSection load='3sjb' size='340' side='right' caption='[[3sjb]], [[Resolution|resolution]] 3.30Å' scene=''> | + | <StructureSection load='3sjb' size='340' side='right'caption='[[3sjb]], [[Resolution|resolution]] 3.30Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3sjb]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SJB FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3sjb]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SJB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SJB FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3sja|3sja]], [[3sjc|3sjc]], [[3sjd|3sjd]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GET3, ARR4, YDL100C, D2371 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]), GET1, MDM39, YGL020C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])</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=3sjb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sjb OCA], [https://pdbe.org/3sjb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3sjb RCSB], [https://www.ebi.ac.uk/pdbsum/3sjb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3sjb ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3sjb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sjb OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3sjb RCSB], [http://www.ebi.ac.uk/pdbsum/3sjb PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| - | <div style="background-color:#fffaf0;">
| + | == Function == |
| - | == Publication Abstract from PubMed == | + | [https://www.uniprot.org/uniprot/GET3_YEAST GET3_YEAST] ATPase required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. This complex then targets to the endoplasmic reticulum by membrane-bound receptors GET1 and GET2, where the tail-anchored protein is released for insertion. This process is regulated by ATP binding and hydrolysis. ATP binding drives the homodimer towards the closed dimer state, facilitating recognition of newly synthesized TA membrane proteins. ATP hydrolysis is required for insertion. Subsequently, the homodimer reverts towards the open dimer state, lowering its affinity for the GET1-GET2 receptor, and returning it to the cytosol to initiate a new round of targeting. Cooperates with the HDEL receptor ERD2 to mediate the ATP-dependent retrieval of resident ER proteins that contain a C-terminal H-D-E-L retention signal from the Golgi to the ER. Involved in low-level resistance to the oxyanions arsenite and arsenate, and in heat tolerance.<ref>PMID:12680698</ref> <ref>PMID:16269340</ref> <ref>PMID:18724936</ref> <ref>PMID:21866104</ref> <ref>PMID:21719644</ref> |
| - | Tail-anchored (TA) proteins are involved in cellular processes including trafficking, degradation, and apoptosis. They contain a C-terminal membrane anchor and are posttranslationally delivered to the endoplasmic reticulum membrane by the Get3 adenosine triphosphatase interacting with the heterooligomeric Get1/2 receptor. We have determined crystal structures of Get3 in complex with the cytosolic domains of Get1 and Get2 in different functional states at 3.0, 3.2, and 4.6 angstrom resolution. The structural data, together with biochemical experiments, show that Get1 and Get2 use adjacent, partially overlapping binding sites and that both can bind simultaneously to Get3. Docking to the Get1/2 complex allows for conformational changes in Get3 that are required for TA protein insertion. These data suggest a molecular mechanism for nucleotide-regulated delivery of TA proteins.
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| - | Structural Basis for Tail-Anchored Membrane Protein Biogenesis by the Get3-Receptor Complex.,Stefer S, Reitz S, Wang F, Wild K, Pang YY, Schwarz D, Bomke J, Hein C, Lohr F, Bernhard F, Denic V, Dotsch V, Sinning I Science. 2011 Jun 30. PMID:21719644<ref>PMID:21719644</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div> | + | |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[ATPase|ATPase]] | + | *[[ATPase 3D structures|ATPase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Saccharomyces cerevisiae]] | + | [[Category: Large Structures]] |
| - | [[Category: Reitz, S]] | + | [[Category: Saccharomyces cerevisiae S288C]] |
| - | [[Category: Sinning, I]] | + | [[Category: Reitz S]] |
| - | [[Category: Wild, K]] | + | [[Category: Sinning I]] |
| - | [[Category: Coiled-coil]]
| + | [[Category: Wild K]] |
| - | [[Category: Get pathway]]
| + | |
| - | [[Category: Hydrolase-transport protein complex]]
| + | |
| - | [[Category: Receptor complex]]
| + | |
| - | [[Category: Ta-protein biogenesis]]
| + | |
| Structural highlights
Function
GET3_YEAST ATPase required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. This complex then targets to the endoplasmic reticulum by membrane-bound receptors GET1 and GET2, where the tail-anchored protein is released for insertion. This process is regulated by ATP binding and hydrolysis. ATP binding drives the homodimer towards the closed dimer state, facilitating recognition of newly synthesized TA membrane proteins. ATP hydrolysis is required for insertion. Subsequently, the homodimer reverts towards the open dimer state, lowering its affinity for the GET1-GET2 receptor, and returning it to the cytosol to initiate a new round of targeting. Cooperates with the HDEL receptor ERD2 to mediate the ATP-dependent retrieval of resident ER proteins that contain a C-terminal H-D-E-L retention signal from the Golgi to the ER. Involved in low-level resistance to the oxyanions arsenite and arsenate, and in heat tolerance.[1] [2] [3] [4] [5]
See Also
References
- ↑ Shen J, Hsu CM, Kang BK, Rosen BP, Bhattacharjee H. The Saccharomyces cerevisiae Arr4p is involved in metal and heat tolerance. Biometals. 2003 Sep;16(3):369-78. PMID:12680698
- ↑ Schuldiner M, Collins SR, Thompson NJ, Denic V, Bhamidipati A, Punna T, Ihmels J, Andrews B, Boone C, Greenblatt JF, Weissman JS, Krogan NJ. Exploration of the function and organization of the yeast early secretory pathway through an epistatic miniarray profile. Cell. 2005 Nov 4;123(3):507-19. PMID:16269340 doi:S0092-8674(05)00868-8
- ↑ Schuldiner M, Metz J, Schmid V, Denic V, Rakwalska M, Schmitt HD, Schwappach B, Weissman JS. The GET complex mediates insertion of tail-anchored proteins into the ER membrane. Cell. 2008 Aug 22;134(4):634-45. PMID:18724936 doi:S0092-8674(08)00777-0
- ↑ Mariappan M, Mateja A, Dobosz M, Bove E, Hegde RS, Keenan RJ. The mechanism of membrane-associated steps in tail-anchored protein insertion. Nature. 2011 Aug 24;477(7362):61-6. doi: 10.1038/nature10362. PMID:21866104 doi:10.1038/nature10362
- ↑ Stefer S, Reitz S, Wang F, Wild K, Pang YY, Schwarz D, Bomke J, Hein C, Lohr F, Bernhard F, Denic V, Dotsch V, Sinning I. Structural Basis for Tail-Anchored Membrane Protein Biogenesis by the Get3-Receptor Complex. Science. 2011 Jun 30. PMID:21719644 doi:10.1126/science.1207125
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