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| | <StructureSection load='2plf' size='340' side='right'caption='[[2plf]], [[Resolution|resolution]] 2.90Å' scene=''> | | <StructureSection load='2plf' size='340' side='right'caption='[[2plf]], [[Resolution|resolution]] 2.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2plf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/'saccharolobus_solfataricus' 'saccharolobus solfataricus']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PLF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PLF FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2plf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharolobus_solfataricus Saccharolobus solfataricus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PLF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PLF 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;'>[[2aho|2aho]]</div></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">eif2g ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 'Saccharolobus solfataricus'])</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=2plf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2plf OCA], [https://pdbe.org/2plf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2plf RCSB], [https://www.ebi.ac.uk/pdbsum/2plf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2plf 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=2plf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2plf OCA], [https://pdbe.org/2plf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2plf RCSB], [https://www.ebi.ac.uk/pdbsum/2plf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2plf ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/IF2G_SULSO IF2G_SULSO]] eIF-2 functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA (By similarity).
| + | [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] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Saccharolobus solfataricus]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Blaesi, U]] | + | [[Category: Saccharolobus solfataricus]] |
| - | [[Category: Fedorov, R V]] | + | [[Category: Blaesi U]] |
| - | [[Category: Garber, M B]] | + | [[Category: Fedorov RV]] |
| - | [[Category: Hasenohrl, D]] | + | [[Category: Garber MB]] |
| - | [[Category: Manstein, D J]] | + | [[Category: Hasenohrl D]] |
| - | [[Category: Nikonov, O S]] | + | [[Category: Manstein DJ]] |
| - | [[Category: Nikonov, S V]] | + | [[Category: Nikonov OS]] |
| - | [[Category: Nikulin, A D]] | + | [[Category: Nikonov SV]] |
| - | [[Category: Stolboushkina, E A]] | + | [[Category: Nikulin AD]] |
| - | [[Category: Aif2]]
| + | [[Category: Stolboushkina EA]] |
| - | [[Category: Initiation factor 2 gamma subunit]]
| + | |
| - | [[Category: Initiation of the translation]]
| + | |
| - | [[Category: Nucleotide binding]]
| + | |
| - | [[Category: Translation]]
| + | |
| Structural highlights
Function
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]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Heterotrimeric a/eIF2alphabetagamma (archaeal homologue of the eukaryotic translation initiation factor 2 with alpha, beta and gamma subunits) delivers charged initiator tRNA (tRNAi) to the small ribosomal subunit. In this work, we determined the structures of aIF2gamma from the archaeon Sulfolobus solfataricus in the nucleotide-free and GDP-bound forms. Comparison of the free, GDP and Gpp(NH)p-Mg2+ forms of aIF2gamma revealed a sequence of conformational changes upon GDP and GTP binding. Our results show that the affinity of GDP to the G domain of the gamma subunit is higher than that of Gpp(NH)p. In analyzing a pyrophosphate molecule binding to domain II of the gamma subunit, we found a cleft that is very suitable for the acceptor stem of tRNA accommodation. It allows the suggestion of an alternative position for Met-tRNA i Met on the alphagamma intersubunit dimer, at variance with a recently published one. In the model reported here, the acceptor stem of the tRNAi is approximately perpendicular to that of tRNA in the ternary complex elongation factor Tu-Gpp(NH)p-tRNA. According to our analysis, the elbow and T stem of Met-tRNA i Met in this position should make extensive contact with the alpha subunit of aIF2. Thus, this model is in good agreement with experimental data showing that the alpha subunit of aIF2 is necessary for the stable interaction of aIF2gamma with Met-tRNA i Met.
New insights into the interactions of the translation initiation factor 2 from archaea with guanine nucleotides and initiator tRNA.,Nikonov O, Stolboushkina E, Nikulin A, Hasenohrl D, Blasi U, Manstein DJ, Fedorov R, Garber M, Nikonov S J Mol Biol. 2007 Oct 19;373(2):328-36. Epub 2007 Aug 2. PMID:17825838[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Nikonov O, Stolboushkina E, Nikulin A, Hasenohrl D, Blasi U, Manstein DJ, Fedorov R, Garber M, Nikonov S. New insights into the interactions of the translation initiation factor 2 from archaea with guanine nucleotides and initiator tRNA. J Mol Biol. 2007 Oct 19;373(2):328-36. Epub 2007 Aug 2. PMID:17825838 doi:10.1016/j.jmb.2007.07.048
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