1g7s

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[[Image:1g7s.jpg|left|200px]]<br /><applet load="1g7s" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1g7s, resolution 2.&Aring;" />
 
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'''X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B COMPLEXED WITH GDP'''<br />
 
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==Overview==
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==X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B COMPLEXED WITH GDP==
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X-ray structures of the universal translation initiation factor IF2/eIF5B have been determined in three states: free enzyme, inactive IF2/eIF5B.GDP, and active IF2/eIF5B.GTP. The "chalice-shaped" enzyme is a GTPase that facilitates ribosomal subunit joining and Met-tRNA(i) binding to ribosomes in all three kingdoms of life. The conserved core of IF2/eIF5B consists of an N-terminal G domain (I) plus an EF-Tu-type beta barrel (II), followed by a novel alpha/beta/alpha-sandwich (III) connected via an alpha helix to a second EF-Tu-type beta barrel (IV). Structural comparisons reveal a molecular lever, which amplifies a modest conformational change in the Switch 2 region of the G domain induced by Mg(2+)/GTP binding over a distance of 90 A from the G domain active center to domain IV. Mechanisms of GTPase function and ribosome binding are discussed.
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<StructureSection load='1g7s' size='340' side='right'caption='[[1g7s]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1g7s]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanothermobacter_thermautotrophicus Methanothermobacter thermautotrophicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G7S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1G7S FirstGlance]. <br>
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1G7S is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Methanothermobacter_thermautotrophicus Methanothermobacter thermautotrophicus] with <scene name='pdbligand=GDP:'>GDP</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G7S OCA].
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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&#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=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene></td></tr>
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==Reference==
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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=1g7s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g7s OCA], [https://pdbe.org/1g7s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1g7s RCSB], [https://www.ebi.ac.uk/pdbsum/1g7s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1g7s ProSAT]</span></td></tr>
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X-Ray structures of the universal translation initiation factor IF2/eIF5B: conformational changes on GDP and GTP binding., Roll-Mecak A, Cao C, Dever TE, Burley SK, Cell. 2000 Nov 22;103(5):781-92. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11114334 11114334]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/IF2P_METTH IF2P_METTH] Function in general translation initiation by promoting the binding of the formylmethionine-tRNA to ribosomes. Seems to function along with eIF-2 (By similarity).
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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/g7/1g7s_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=1g7s ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Methanothermobacter thermautotrophicus]]
[[Category: Methanothermobacter thermautotrophicus]]
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[[Category: Single protein]]
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[[Category: Burley SK]]
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[[Category: Burley, S K.]]
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[[Category: Cao C]]
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[[Category: Cao, C.]]
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[[Category: Dever TE]]
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[[Category: Dever, T E.]]
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[[Category: Roll-Mecak A]]
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[[Category: Roll-Mecak, A.]]
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[[Category: GDP]]
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[[Category: translational gtpase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:47:06 2008''
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Current revision

X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B COMPLEXED WITH GDP

PDB ID 1g7s

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