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1n33

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[[Image:1n33.gif|left|200px]]
 
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{{Structure
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==Structure of the Thermus thermophilus 30S ribosomal subunit bound to codon and near-cognate transfer rna anticodon stem-loop mismatched at the second codon position at the a site with paromomycin==
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|PDB= 1n33 |SIZE=350|CAPTION= <scene name='initialview01'>1n33</scene>, resolution 3.35&Aring;
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<StructureSection load='1n33' size='340' side='right'caption='[[1n33]], [[Resolution|resolution]] 3.35&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=PAR:PAROMOMYCIN'>PAR</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=ZN:ZINC ION'>ZN</scene>
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<table><tr><td colspan='2'>[[1n33]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N33 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1N33 FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.35&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PAR:PAROMOMYCIN'>PAR</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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}}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1n33 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n33 OCA], [https://pdbe.org/1n33 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1n33 RCSB], [https://www.ebi.ac.uk/pdbsum/1n33 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1n33 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/RS2_THET8 RS2_THET8] Spans the head-body hinge region of the 30S subunit. Is loosely associated with the 30S subunit.[HAMAP-Rule:MF_00291_B]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n3/1n33_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=1n33 ConSurf].
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<div style="clear:both"></div>
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'''Structure of the Thermus thermophilus 30S ribosomal subunit bound to codon and near-cognate transfer rna anticodon stem-loop mismatched at the second codon position at the a site with paromomycin'''
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==See Also==
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*[[Ribosomal protein THX 3D structures|Ribosomal protein THX 3D structures]]
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*[[Ribosome 3D structures|Ribosome 3D structures]]
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==Overview==
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__TOC__
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A structural and mechanistic explanation for the selection of tRNAs by the ribosome has been elusive. Here, we report crystal structures of the 30S ribosomal subunit with codon and near-cognate tRNA anticodon stem loops bound at the decoding center and compare affinities of equivalent complexes in solution. In ribosomal interactions with near-cognate tRNA, deviation from Watson-Crick geometry results in uncompensated desolvation of hydrogen-bonding partners at the codon-anticodon minor groove. As a result, the transition to a closed form of the 30S induced by cognate tRNA is unfavorable for near-cognate tRNA unless paromomycin induces part of the rearrangement. We conclude that stabilization of a closed 30S conformation is required for tRNA selection, and thereby structurally rationalize much previous data on translational fidelity.
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</StructureSection>
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[[Category: Large Structures]]
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==About this Structure==
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1N33 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N33 OCA].
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==Reference==
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Selection of tRNA by the ribosome requires a transition from an open to a closed form., Ogle JM, Murphy FV, Tarry MJ, Ramakrishnan V, Cell. 2002 Nov 27;111(5):721-32. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12464183 12464183]
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[[Category: Protein complex]]
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[[Category: Thermus thermophilus]]
[[Category: Thermus thermophilus]]
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[[Category: IV, F V.Murphy.]]
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[[Category: Murphy IV FV]]
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[[Category: Ogle, J M.]]
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[[Category: Ogle JM]]
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[[Category: Ramakrishnan, V.]]
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[[Category: Ramakrishnan V]]
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[[Category: Tarry, M J.]]
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[[Category: Tarry MJ]]
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[[Category: MG]]
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[[Category: PAR]]
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[[Category: ZN]]
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[[Category: 30s ribosomal subunit]]
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[[Category: a site]]
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[[Category: antibiotic]]
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[[Category: anticodon]]
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[[Category: codon]]
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[[Category: decoding]]
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[[Category: g:u]]
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[[Category: gu]]
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[[Category: messenger rna]]
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[[Category: mismatch]]
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[[Category: mrna]]
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[[Category: near-cognate]]
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[[Category: paromomycin]]
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[[Category: ribosome]]
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[[Category: stem-loop]]
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[[Category: transfer rna]]
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[[Category: trna]]
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[[Category: wobble]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:51:31 2008''
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Current revision

Structure of the Thermus thermophilus 30S ribosomal subunit bound to codon and near-cognate transfer rna anticodon stem-loop mismatched at the second codon position at the a site with paromomycin

PDB ID 1n33

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