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| ==Structure of the signal recognition particle interacting with the elongation-arrested ribosome== | | ==Structure of the signal recognition particle interacting with the elongation-arrested ribosome== |
| <StructureSection load='1ry1' size='340' side='right' caption='[[1ry1]], [[Resolution|resolution]] 12.00Å' scene=''> | | <SX load='1ry1' size='340' side='right' viewer='molstar' caption='[[1ry1]], [[Resolution|resolution]] 12.00Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[1ry1]] is a 14 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_25104 Atcc 25104], [http://en.wikipedia.org/wiki/Atlantic_bottle-nosed_dolphin Atlantic bottle-nosed dolphin], [http://en.wikipedia.org/wiki/Human Human] and [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RY1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1RY1 FirstGlance]. <br> | | <table><tr><td colspan='2'>[[1ry1]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Canis_lupus_familiaris Canis lupus familiaris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RY1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RY1 FirstGlance]. <br> |
| </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CCC:CYTIDINE-5-PHOSPHATE-2,3-CYCLIC+PHOSPHATE'>CCC</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene></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]] 12Å</td></tr> |
| <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SRP14 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), SRP19 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), FFH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=271 ATCC 25104]), SRP54 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice]), RHO ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9739 Atlantic bottle-nosed dolphin]), SRP9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CCC:CYTIDINE-5-PHOSPHATE-2,3-CYCLIC+PHOSPHATE'>CCC</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene></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=1ry1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ry1 OCA], [http://pdbe.org/1ry1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ry1 RCSB], [http://www.ebi.ac.uk/pdbsum/1ry1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ry1 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=1ry1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ry1 OCA], [https://pdbe.org/1ry1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ry1 RCSB], [https://www.ebi.ac.uk/pdbsum/1ry1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ry1 ProSAT]</span></td></tr> |
| </table> | | </table> |
| == Function == | | == Function == |
| [[http://www.uniprot.org/uniprot/SRP19_HUMAN SRP19_HUMAN]] Signal-recognition-particle assembly, binds directly to 7S RNA and mediates binding of the 54 kDa subunit of the SRP. [[http://www.uniprot.org/uniprot/SRP09_HUMAN SRP09_HUMAN]] Signal-recognition-particle assembly has a crucial role in targeting secretory proteins to the rough endoplasmic reticulum membrane. SRP9 together with SRP14 and the Alu portion of the SRP RNA, constitutes the elongation arrest domain of SRP. The complex of SRP9 and SRP14 is required for SRP RNA binding. [[http://www.uniprot.org/uniprot/SRP54_THEAQ SRP54_THEAQ]] Involved in targeting and insertion of nascent membrane proteins into the cytoplasmic membrane. Binds to the hydrophobic signal sequence of the ribosome-nascent chain (RNC) as it emerges from the ribosomes. The SRP-RNC complex is then targeted to the cytoplasmic membrane where it interacts with the SRP receptor FtsY (By similarity).[HAMAP-Rule:MF_00306] [[http://www.uniprot.org/uniprot/OPSD_TURTR OPSD_TURTR]] Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change leading to G-protein activation and release of all-trans retinal (By similarity). [[http://www.uniprot.org/uniprot/SRP54_MOUSE SRP54_MOUSE]] Binds to the signal sequence of presecretory protein when they emerge from the ribosomes and transfers them to TRAM (translocating chain-associating membrane protein). [[http://www.uniprot.org/uniprot/SRP14_HUMAN SRP14_HUMAN]] Signal-recognition-particle assembly has a crucial role in targeting secretory proteins to the rough endoplasmic reticulum membrane. SRP9 together with SRP14 and the Alu portion of the SRP RNA, constitutes the elongation arrest domain of SRP. The complex of SRP9 and SRP14 is required for SRP RNA binding. | | [https://www.uniprot.org/uniprot/SRP09_HUMAN SRP09_HUMAN] Signal-recognition-particle assembly has a crucial role in targeting secretory proteins to the rough endoplasmic reticulum membrane. SRP9 together with SRP14 and the Alu portion of the SRP RNA, constitutes the elongation arrest domain of SRP. The complex of SRP9 and SRP14 is required for SRP RNA binding. |
| == Evolutionary Conservation == | | == Evolutionary Conservation == |
| [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ry1 ConSurf]. | | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ry1 ConSurf]. |
| <div style="clear:both"></div> | | <div style="clear:both"></div> |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| Cotranslational translocation of proteins across or into membranes is a vital process in all kingdoms of life. It requires that the translating ribosome be targeted to the membrane by the signal recognition particle (SRP), an evolutionarily conserved ribonucleoprotein particle. SRP recognizes signal sequences of nascent protein chains emerging from the ribosome. Subsequent binding of SRP leads to a pause in peptide elongation and to the ribosome docking to the membrane-bound SRP receptor. Here we present the structure of a targeting complex consisting of mammalian SRP bound to an active 80S ribosome carrying a signal sequence. This structure, solved to 12 A by cryo-electron microscopy, enables us to generate a molecular model of SRP in its functional conformation. The model shows how the S domain of SRP contacts the large ribosomal subunit at the nascent chain exit site to bind the signal sequence, and that the Alu domain reaches into the elongation-factor-binding site of the ribosome, explaining its elongation arrest activity.
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| Structure of the signal recognition particle interacting with the elongation-arrested ribosome.,Halic M, Becker T, Pool MR, Spahn CM, Grassucci RA, Frank J, Beckmann R Nature. 2004 Feb 26;427(6977):808-14. PMID:14985753<ref>PMID:14985753</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 1ry1" style="background-color:#fffaf0;"></div>
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| ==See Also== | | ==See Also== |
| *[[Avidin|Avidin]] | | *[[Avidin 3D structures|Avidin 3D structures]] |
| *[[Signal recognition particle protein|Signal recognition particle protein]] | | *[[Signal recognition particle 3D structures|Signal recognition particle 3D structures]] |
| == References ==
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| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </SX> |
| [[Category: Atcc 25104]] | | [[Category: Canis lupus familiaris]] |
| [[Category: Atlantic bottle-nosed dolphin]] | | [[Category: Large Structures]] |
| [[Category: Human]]
| | [[Category: Becker T]] |
| [[Category: Lk3 transgenic mice]]
| | [[Category: Beckmann R]] |
| [[Category: Becker, T]] | | [[Category: Frank J]] |
| [[Category: Beckmann, R]] | | [[Category: Grassucci RA]] |
| [[Category: Frank, J]] | | [[Category: Halic M]] |
| [[Category: Grassucci, R A]] | | [[Category: Pool MR]] |
| [[Category: Halic, M]] | | [[Category: Spahn CM]] |
| [[Category: Pool, M R]] | |
| [[Category: Spahn, C M]] | |
| [[Category: Rna binding]]
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| [[Category: Signal recognition particle]]
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| [[Category: Translation]]
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