3eq4: Difference between revisions

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<SX load='3eq4' size='340' side='right' viewer='molstar' caption='[[3eq4]], [[Resolution|resolution]] 12.00&Aring;' scene=''>
<SX load='3eq4' size='340' side='right' viewer='molstar' caption='[[3eq4]], [[Resolution|resolution]] 12.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3eq4]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_k12 Escherichia coli k12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EQ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3EQ4 FirstGlance]. <br>
<table><tr><td colspan='2'>[[3eq4]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EQ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3EQ4 FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2avy|2avy]], [[2aw4|2aw4]], [[1qza|1qza]], [[1ob2|1ob2]], [[3ep2|3ep2]], [[3eq3|3eq3]]</div></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]] 12&#8491;</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=3eq4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3eq4 OCA], [https://pdbe.org/3eq4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3eq4 RCSB], [https://www.ebi.ac.uk/pdbsum/3eq4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3eq4 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=3eq4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3eq4 OCA], [https://pdbe.org/3eq4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3eq4 RCSB], [https://www.ebi.ac.uk/pdbsum/3eq4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3eq4 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/RL11_ECOLI RL11_ECOLI]] This protein binds directly to 23S ribosomal RNA. Forms the L11 stalk, which is mobile in the ribosome, indicating its contribution to the activity of initiation, elongation and release factors.[HAMAP-Rule:MF_00736_B] [[https://www.uniprot.org/uniprot/RS12_ECOLI RS12_ECOLI]] With S4 and S5 plays an important role in translational accuracy.[HAMAP-Rule:MF_00403_B]  Interacts with and stabilizes bases of the 16S rRNA that are involved in tRNA selection in the A site and with the mRNA backbone. Located at the interface of the 30S and 50S subunits, it traverses the body of the 30S subunit contacting proteins on the other side and probably holding the rRNA structure together. The combined cluster of proteins S8, S12 and S17 appears to hold together the shoulder and platform of the 30S subunit (By similarity).[HAMAP-Rule:MF_00403_B]  Cryo-EM studies suggest that S12 contacts the EF-Tu bound tRNA in the A-site during codon-recognition. This contact is most likely broken as the aminoacyl-tRNA moves into the peptidyl transferase center in the 50S subunit.[HAMAP-Rule:MF_00403_B]  
[https://www.uniprot.org/uniprot/RL11_ECOLI RL11_ECOLI] This protein binds directly to 23S ribosomal RNA. Forms the L11 stalk, which is mobile in the ribosome, indicating its contribution to the activity of initiation, elongation and release factors.[HAMAP-Rule:MF_00736_B]
== 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=3eq4 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=3eq4 ConSurf].
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<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The accuracy of ribosomal translation is achieved by an initial selection and a proofreading step, mediated by EF-Tu, which forms a ternary complex with aminoacyl(aa)-tRNA. To study the binding modes of different aa-tRNAs, we compared cryo-EM maps of the kirromycin-stalled ribosome bound with ternary complexes containing Phe-tRNA(Phe), Trp-tRNA(Trp), or Leu-tRNA(LeuI). The three maps suggest a common binding manner of cognate aa-tRNAs in their specific binding with both the ribosome and EF-Tu. All three aa-tRNAs have the same 'loaded spring' conformation with a kink and twist between the D-stem and anticodon stem. The three complexes are similarly integrated in an interaction network, extending from the anticodon loop through h44 and protein S12 to the EF-Tu-binding CCA end of aa-tRNA, proposed to signal cognate codon-anticodon interaction to the GTPase centre and tune the accuracy of aa-tRNA selection.
Recognition of aminoacyl-tRNA: a common molecular mechanism revealed by cryo-EM.,Li W, Agirrezabala X, Lei J, Bouakaz L, Brunelle JL, Ortiz-Meoz RF, Green R, Sanyal S, Ehrenberg M, Frank J EMBO J. 2008 Dec 17;27(24):3322-31. Epub 2008 Nov 20. PMID:19020518<ref>PMID:19020518</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3eq4" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Elongation factor 3D structures|Elongation factor 3D structures]]
*[[Elongation factor 3D structures|Elongation factor 3D structures]]
*[[Ribosomal protein L11|Ribosomal protein L11]]
*[[Ribosomal protein L11 3D structures|Ribosomal protein L11 3D structures]]
*[[Ribosomal protein S12|Ribosomal protein S12]]
*[[Ribosomal protein S12|Ribosomal protein S12]]
*[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]]
*[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]]
== References ==
<references/>
__TOC__
__TOC__
</SX>
</SX>
[[Category: Escherichia coli k12]]
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Agirrezabala, X]]
[[Category: Agirrezabala X]]
[[Category: Frank, J]]
[[Category: Frank J]]
[[Category: Li, W]]
[[Category: Li W]]
[[Category: A/t-trna]]
[[Category: Antibiotic resistance]]
[[Category: Automated data collection]]
[[Category: Elongation factor]]
[[Category: Gtp-binding]]
[[Category: Membrane]]
[[Category: Methylation]]
[[Category: Nucleotide-binding]]
[[Category: Phosphoprotein]]
[[Category: Protein biosynthesis]]
[[Category: Protein translation]]
[[Category: Ribonucleoprotein]]
[[Category: Ribosomal protein]]
[[Category: Ribosomal protein-rna complex]]
[[Category: Rna-binding]]
[[Category: Rrna-binding]]
[[Category: Ternary complex]]
[[Category: Trna-binding]]

Latest revision as of 09:49, 21 February 2024

Model of tRNA(Leu)-EF-Tu in the ribosomal pre-accommodated state revealed by cryo-EM

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