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| | ==Structure of the ternary initiation complex AIF2:GDPNP:methionylated initiator TRNA== | | ==Structure of the ternary initiation complex AIF2:GDPNP:methionylated initiator TRNA== |
| - | <StructureSection load='3v11' size='340' side='right' caption='[[3v11]], [[Resolution|resolution]] 5.00Å' scene=''> | + | <StructureSection load='3v11' size='340' side='right'caption='[[3v11]], [[Resolution|resolution]] 5.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3v11]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3V11 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3V11 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3v11]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [https://en.wikipedia.org/wiki/Saccharolobus_solfataricus_P2 Saccharolobus solfataricus P2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3V11 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3V11 FirstGlance]. <br> |
| - | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=MET:METHIONINE'>MET</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 5Å</td></tr> |
| - | <tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=4SU:4-THIOURIDINE-5-MONOPHOSPHATE'>4SU</scene>, <scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=H2U:5,6-DIHYDROURIDINE-5-MONOPHOSPHATE'>H2U</scene>, <scene name='pdbligand=OMC:O2-METHYLYCYTIDINE-5-MONOPHOSPHATE'>OMC</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4SU:4-THIOURIDINE-5-MONOPHOSPHATE'>4SU</scene>, <scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=H2U:5,6-DIHYDROURIDINE-5-MONOPHOSPHATE'>H2U</scene>, <scene name='pdbligand=MET:METHIONINE'>MET</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=OMC:O2-METHYLYCYTIDINE-5-MONOPHOSPHATE'>OMC</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene></td></tr> |
| - | <tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2aho|2aho]], [[2qmu|2qmu]], [[3cw5|3cw5]]</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=3v11 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3v11 OCA], [https://pdbe.org/3v11 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3v11 RCSB], [https://www.ebi.ac.uk/pdbsum/3v11 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3v11 ProSAT]</span></td></tr> |
| - | <tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">eif2g, SSO0412 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 Sulfolobus solfataricus]), eif2a, SSO1050 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 Sulfolobus solfataricus]), eif2b, SSO2381 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 Sulfolobus solfataricus])</td></tr>
| + | </table> |
| - | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3v11 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3v11 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3v11 RCSB], [http://www.ebi.ac.uk/pdbsum/3v11 PDBsum]</span></td></tr>
| + | == Function == |
| - | <table> | + | [https://www.uniprot.org/uniprot/IF2G_SACS2 IF2G_SACS2] eIF-2 functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA.[HAMAP-Rule:MF_00119] |
| - | <div style="background-color:#fffaf0;">
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| - | == Publication Abstract from PubMed == | + | |
| - | Eukaryotic and archaeal translation initiation factor 2 (e/aIF2) is a heterotrimeric GTPase that has a crucial role in the selection of the correct start codon on messenger RNA. We report the 5-A resolution crystal structure of the ternary complex formed by archaeal aIF2 from Sulfolobus solfataricus, the GTP analog GDPNP and methionylated initiator tRNA. The 3D model is further supported by solution studies using small-angle X-ray scattering. The tRNA is bound by the alpha and gamma subunits of aIF2. Contacts involve the elbow of the tRNA and the minor groove of the acceptor stem, but not the T-stem minor groove. We conclude that despite considerable structural homology between the core gamma subunit of aIF2 and the elongation factor EF1A, these two G proteins of the translation apparatus use very different tRNA-binding strategies.
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| - | Structure of the ternary initiation complex aIF2-GDPNP-methionylated initiator tRNA.,Schmitt E, Panvert M, Lazennec-Schurdevin C, Coureux PD, Perez J, Thompson A, Mechulam Y Nat Struct Mol Biol. 2012 Mar 25;19(4):450-4. doi: 10.1038/nsmb.2259. PMID:22447243<ref>PMID:22447243</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | ==See Also== |
| - | </div>
| + | *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] |
| - | == References == | + | |
| - | <references/>
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | [[Category: Escherichia coli]] | | [[Category: Escherichia coli]] |
| - | [[Category: Sulfolobus solfataricus]] | + | [[Category: Large Structures]] |
| - | [[Category: Mechulam, Y.]] | + | [[Category: Saccharolobus solfataricus P2]] |
| - | [[Category: Schmitt, E.]] | + | [[Category: Mechulam Y]] |
| - | [[Category: Gtp and trna]] | + | [[Category: Schmitt E]] |
| - | [[Category: Gtp binding module]]
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| - | [[Category: Initiator trna carrier]]
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| - | [[Category: Translation-rna complex]]
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