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1eft

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(New page: 200px<br /> <applet load="1eft" size="450" color="white" frame="true" align="right" spinBox="true" caption="1eft, resolution 2.5&Aring;" /> '''THE CRYSTAL STRUCTUR...)
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[[Image:1eft.gif|left|200px]]<br />
 
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<applet load="1eft" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1eft, resolution 2.5&Aring;" />
 
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'''THE CRYSTAL STRUCTURE OF ELONGATION FACTOR EF-TU FROM THERMUS AQUATICUS IN THE GTP CONFORMATION'''<br />
 
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==Overview==
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==THE CRYSTAL STRUCTURE OF ELONGATION FACTOR EF-TU FROM THERMUS AQUATICUS IN THE GTP CONFORMATION==
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BACKGROUND: Elongation factor Tu (EF-Tu) is a GTP-binding protein that is, crucial for protein biosynthesis. In the GTP form of the molecule, EF-Tu, binds tightly to aminoacyl-tRNA, forming a ternary complex that interacts, with the ribosomal acceptor site. During this interaction, GTP is, hydrolyzed, and EF-Tu.GDP is ejected. RESULTS: The crystal structure of, EF-Tu from Thermus aquaticus, complexed to the GTP analogue GDPNP, has, been determined at 2.5 A resolution and compared to the structure of, Escherichia coli EF-Tu.GDP. During the transition from the GDP (inactive), to the GTP (active) form, domain 1, containing the GTP-binding site, undergoes internal conformational changes similar to those observed in, ras-p21. In addition, a dramatic rearrangement of domains is observed, corresponding to a rotation of 90.8 degrees of domain 1 relative to, domains 2 and 3. Residues that are affected in the binding of, aminoacyl-tRNA are found in or near the cleft formed by the domain, interface. CONCLUSION: GTP binding by EF-Tu leads to dramatic, conformational changes which expose the tRNA binding site. It appears that, tRNA binding to EF-Tu induces a further conformational change, which may, affect the GTPase activity.
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<StructureSection load='1eft' size='340' side='right'caption='[[1eft]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1eft]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. The September 2006 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Elongation Factors'' by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2006_9 10.2210/rcsb_pdb/mom_2006_9]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EFT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EFT FirstGlance]. <br>
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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]] 2.5&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
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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=1eft FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eft OCA], [https://pdbe.org/1eft PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1eft RCSB], [https://www.ebi.ac.uk/pdbsum/1eft PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1eft ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/EFTU_THEAQ EFTU_THEAQ] This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis.[HAMAP-Rule:MF_00118_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/ef/1eft_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=1eft ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1EFT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus] with MG and GNP as [http://en.wikipedia.org/wiki/ligands ligands]. The following page contains interesting information on the relation of 1EFT with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb81_1.html Elongation Factors]]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1EFT OCA].
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*[[Elongation factor 3D structures|Elongation factor 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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The crystal structure of elongation factor EF-Tu from Thermus aquaticus in the GTP conformation., Kjeldgaard M, Nissen P, Thirup S, Nyborg J, Structure. 1993 Sep 15;1(1):35-50. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8069622 8069622]
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[[Category: Elongation Factors]]
[[Category: Elongation Factors]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: RCSB PDB Molecule of the Month]]
[[Category: Thermus aquaticus]]
[[Category: Thermus aquaticus]]
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[[Category: Kjeldgaard, M.]]
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[[Category: Kjeldgaard M]]
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[[Category: Nissen, P.]]
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[[Category: Nissen P]]
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[[Category: Nyborg, J.]]
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[[Category: Nyborg J]]
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[[Category: Thirup, S.]]
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[[Category: Thirup S]]
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[[Category: GNP]]
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[[Category: MG]]
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[[Category: elongation factor]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 18 08:59:24 2007''
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Current revision

THE CRYSTAL STRUCTURE OF ELONGATION FACTOR EF-TU FROM THERMUS AQUATICUS IN THE GTP CONFORMATION

PDB ID 1eft

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