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| ==Localization of the small subunit ribosomal proteins into a 6.1 A cryo-EM map of Saccharomyces cerevisiae translating 80S ribosome== | | ==Localization of the small subunit ribosomal proteins into a 6.1 A cryo-EM map of Saccharomyces cerevisiae translating 80S ribosome== |
| <StructureSection load='4v6i' size='340' side='right'caption='[[4v6i]], [[Resolution|resolution]] 8.80Å' scene=''> | | <SX load='4v6i' size='340' side='right' viewer='molstar' caption='[[4v6i]], [[Resolution|resolution]] 8.80Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[4v6i]] is a 86 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izb 3izb], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3ize 3ize], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izf 3izf], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izs 3izs] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izc 3izc]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4V6I OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4V6I FirstGlance]. <br> | | <table><tr><td colspan='2'>[[4v6i]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izb 3izb], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3ize 3ize], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izf 3izf], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izs 3izs] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3izc 3izc]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4V6I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4V6I FirstGlance]. <br> |
| </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNK:UNKNOWN'>UNK</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]] 8.8Å</td></tr> |
| <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3iz5|3iz5]], [[3iz6|3iz6]], [[3iz7|3iz7]], [[3iz9|3iz9]], [[3izd|3izd]]</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=4v6i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4v6i OCA], [https://pdbe.org/4v6i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4v6i RCSB], [https://www.ebi.ac.uk/pdbsum/4v6i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4v6i 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=4v6i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4v6i OCA], [http://pdbe.org/4v6i PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4v6i RCSB], [http://www.ebi.ac.uk/pdbsum/4v6i PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4v6i ProSAT]</span></td></tr> | |
| </table> | | </table> |
| == Function == | | == Function == |
| [[http://www.uniprot.org/uniprot/RL4A_YEAST RL4A_YEAST]] Participates in the regulation of the accumulation of its own mRNA.<ref>PMID:2065661</ref> [[http://www.uniprot.org/uniprot/RS21A_YEAST RS21A_YEAST]] Required for the processing of the 20S rRNA-precursor to mature 18S rRNA in a late step of the maturation of 40S ribosomal subunits. Has a physiological role leading to 18S rRNA stability.<ref>PMID:14627813</ref> [[http://www.uniprot.org/uniprot/RS9B_YEAST RS9B_YEAST]] Involved in nucleolar processing of pre-18S ribosomal RNA and ribosome assembly.<ref>PMID:15590835</ref> [[http://www.uniprot.org/uniprot/RLA1_YEAST RLA1_YEAST]] Plays an important role in the elongation step of protein synthesis. [[http://www.uniprot.org/uniprot/RL5_YEAST RL5_YEAST]] Binds 5S RNA and is required for 60S subunit assembly. [[http://www.uniprot.org/uniprot/RS19A_YEAST RS19A_YEAST]] Required for proper maturation of the small (40S) ribosomal subunit. Binds to 40s pre-ribosomal particles, probably required after association of NOC4 but before association of ENP1, TSR1 and RIO2 with 20/21S pre-rRNA.<ref>PMID:16159874</ref> <ref>PMID:17726054</ref> [[http://www.uniprot.org/uniprot/RS27A_YEAST RS27A_YEAST]] Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, and DNA-damage responses. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling (By similarity). 40S ribosomal protein S31 is a component of the 40S subunit of the ribosome (By similarity). [[http://www.uniprot.org/uniprot/RL25_YEAST RL25_YEAST]] This protein binds to a specific region on the 26S rRNA. [[http://www.uniprot.org/uniprot/RL37A_YEAST RL37A_YEAST]] Binds to the 23S rRNA (By similarity). [[http://www.uniprot.org/uniprot/RS14A_YEAST RS14A_YEAST]] Involved in nucleolar processing of pre-18S ribosomal RNA and ribosome assembly.<ref>PMID:15590835</ref> [[http://www.uniprot.org/uniprot/RLA2_YEAST RLA2_YEAST]] Plays an important role in the elongation step of protein synthesis. [[http://www.uniprot.org/uniprot/RS15_YEAST RS15_YEAST]] Involved in the nuclear export of the small ribosomal subunit. Has a role in the late stage of the assembly of pre-40S particles within the nucleus and controls their export to the cytoplasm.<ref>PMID:15167894</ref> [[http://www.uniprot.org/uniprot/RL401_YEAST RL401_YEAST]] Ubiquitin: exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, and DNA-damage responses. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling (By similarity).<ref>PMID:23169626</ref> 60S ribosomal protein L40: component of the 60S subunit of the ribosome. Ribosomal protein L40 is essential for translation of a subset of cellular transcripts, including stress response transcripts, such as DDR2.<ref>PMID:23169626</ref> [[http://www.uniprot.org/uniprot/RSSA1_YEAST RSSA1_YEAST]] Required for the assembly and/or stability of the 40S ribosomal subunit. Required for the processing of the 20S rRNA-precursor to mature 18S rRNA in a late step of the maturation of 40S ribosomal subunits.<ref>PMID:9973221</ref> <ref>PMID:14627813</ref> [[http://www.uniprot.org/uniprot/GBLP_YEAST GBLP_YEAST]] Located at the head of the 40S ribosomal subunit in the vicinity of the mRNA exit channel, it serves as a scaffold protein that can recruit other proteins to the ribosome. Involved in the negative regulation of translation of a specific subset of proteins.<ref>PMID:15340087</ref> [[http://www.uniprot.org/uniprot/RS2_YEAST RS2_YEAST]] Important in the assembly and function of the 40S ribosomal subunit. Mutations in this protein affects the control of translational fidelity. Involved in nucleolar processing of pre-18S ribosomal RNA and ribosome assembly.<ref>PMID:15590835</ref> [[http://www.uniprot.org/uniprot/RLA0_YEAST RLA0_YEAST]] Ribosomal protein P0 is the functional equivalent of E.coli protein L10. [[http://www.uniprot.org/uniprot/RL11A_YEAST RL11A_YEAST]] Binds to 5S ribosomal RNA. [[http://www.uniprot.org/uniprot/RS9A_YEAST RS9A_YEAST]] Involved in nucleolar processing of pre-18S ribosomal RNA and ribosome assembly.<ref>PMID:15590835</ref> | | [https://www.uniprot.org/uniprot/GBLP_YEAST GBLP_YEAST] Located at the head of the 40S ribosomal subunit in the vicinity of the mRNA exit channel, it serves as a scaffold protein that can recruit other proteins to the ribosome. Involved in the negative regulation of translation of a specific subset of proteins.<ref>PMID:15340087</ref> |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| Protein biosynthesis, the translation of the genetic code into polypeptides, occurs on ribonucleoprotein particles called ribosomes. Although X-ray structures of bacterial ribosomes are available, high-resolution structures of eukaryotic 80S ribosomes are lacking. Using cryoelectron microscopy and single-particle reconstruction, we have determined the structure of a translating plant (Triticum aestivum) 80S ribosome at 5.5-A resolution. This map, together with a 6.1-A map of a Saccharomyces cerevisiae 80S ribosome, has enabled us to model approximately 98% of the rRNA. Accurate assignment of the rRNA expansion segments (ES) and variable regions has revealed unique ES-ES and r-protein-ES interactions, providing insight into the structure and evolution of the eukaryotic ribosome.
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| Cryo-EM structure and rRNA model of a translating eukaryotic 80S ribosome at 5.5-A resolution.,Armache JP, Jarasch A, Anger AM, Villa E, Becker T, Bhushan S, Jossinet F, Habeck M, Dindar G, Franckenberg S, Marquez V, Mielke T, Thomm M, Berninghausen O, Beatrix B, Soding J, Westhof E, Wilson DN, Beckmann R Proc Natl Acad Sci U S A. 2010 Nov 16;107(46):19748-53. Epub 2010 Oct 27. PMID:20980660<ref>PMID:20980660</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 4v6i" style="background-color:#fffaf0;"></div>
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| ==See Also== | | ==See Also== |
| *[[Receptor for activated protein kinase C 1|Receptor for activated protein kinase C 1]]
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| *[[Ribosome 3D structures|Ribosome 3D structures]] | | *[[Ribosome 3D structures|Ribosome 3D structures]] |
| *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] | | *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] |
| | *[[3D sructureseceptor for activated protein kinase C 1|3D sructureseceptor for activated protein kinase C 1]] |
| == References == | | == References == |
| <references/> | | <references/> |
| __TOC__ | | __TOC__ |
| </StructureSection> | | </SX> |
| [[Category: Large Structures]] | | [[Category: Large Structures]] |
| [[Category: Saccharomyces cerevisiae]] | | [[Category: Saccharomyces cerevisiae]] |
| [[Category: Anger, A M]] | | [[Category: Anger AM]] |
| [[Category: Armache, J P]] | | [[Category: Armache J-P]] |
| [[Category: Beatrix, B]] | | [[Category: Beatrix B]] |
| [[Category: Becker, T]] | | [[Category: Becker T]] |
| [[Category: Beckmann, R]] | | [[Category: Beckmann R]] |
| [[Category: Berninghausen, O]] | | [[Category: Berninghausen O]] |
| [[Category: Bhushan, S]] | | [[Category: Bhushan S]] |
| [[Category: Dindar, G]] | | [[Category: Dindar G]] |
| [[Category: Franckenberg, S]] | | [[Category: Franckenberg S]] |
| [[Category: Habeck, M]] | | [[Category: Habeck M]] |
| [[Category: Jarasch, A]] | | [[Category: Jarasch A]] |
| [[Category: Jossinet, F]] | | [[Category: Jossinet F]] |
| [[Category: Marquez, V]] | | [[Category: Marquez V]] |
| [[Category: Mielke, T]] | | [[Category: Mielke T]] |
| [[Category: Soeding, J]] | | [[Category: Soeding J]] |
| [[Category: Thomm, M]] | | [[Category: Thomm M]] |
| [[Category: Villa, E]] | | [[Category: Villa E]] |
| [[Category: Westhof, E]] | | [[Category: Westhof E]] |
| [[Category: Wilson, D N]] | | [[Category: Wilson DN]] |
| [[Category: De novo modeling]]
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| [[Category: Eukaryotic ribosome]]
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| [[Category: Homology modeling]]
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| [[Category: Novel ribosomal protein]]
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| [[Category: Ribosomal protein]]
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| [[Category: Ribosome]]
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