4m4s
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==Gamma subunit of the translation initiation factor 2 from Sulfolobus solfataricus in complex with GDP and formate ion mimic aIF2gamma*GDP*Pi complex (a formate ion substitutes for Pi)== | ==Gamma subunit of the translation initiation factor 2 from Sulfolobus solfataricus in complex with GDP and formate ion mimic aIF2gamma*GDP*Pi complex (a formate ion substitutes for Pi)== | ||
| - | <StructureSection load='4m4s' size='340' side='right' caption='[[4m4s]], [[Resolution|resolution]] 2.25Å' scene=''> | + | <StructureSection load='4m4s' size='340' side='right'caption='[[4m4s]], [[Resolution|resolution]] 2.25Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[4m4s]] is a 1 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[4m4s]] is a 1 chain structure with sequence from [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=4M4S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4M4S FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.251Å</td></tr> |
| - | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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=4m4s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m4s OCA], [https://pdbe.org/4m4s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4m4s RCSB], [https://www.ebi.ac.uk/pdbsum/4m4s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4m4s ProSAT]</span></td></tr> | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [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;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | In eukaryotes and archaea, the heterotrimeric translation initiation factor 2 (e/aIF2) is pivotal for the delivery of methionylated initiator tRNA (Met-tRNA(i)) to the ribosome. It acts as a molecular switch that cycles between inactive (GDP-bound) and active (GTP-bound) states. Recent studies show that eIF2 can also exist in a long-lived eIF2gamma-GDP-P(i) (inorganic phosphate) active state. Here, four high-resolution crystal structures of aIF2gamma from Sulfolobus solfataricus are reported: aIF2gamma-GDPCP (a nonhydrolyzable GTP analogue), aIF2gamma-GDP-formate (in which a formate ion possibly mimics P(i)), aIF2gamma-GDP and nucleotide-free aIF2gamma. The structures describe the different states of aIF2gamma and demonstrate the conformational transitions that take place in the aIF2gamma `life cycle'. | ||
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| + | Conformational transitions in the gamma subunit of the archaeal translation initiation factor 2.,Nikonov O, Stolboushkina E, Arkhipova V, Kravchenko O, Nikonov S, Garber M Acta Crystallogr D Biol Crystallogr. 2014 Mar;70(Pt 3):658-67. doi:, 10.1107/S1399004713032240. Epub 2014 Feb 15. PMID:24598735<ref>PMID:24598735</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 4m4s" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Saccharolobus solfataricus P2]] |
| - | [[Category: | + | [[Category: Arkhipova VI]] |
| - | [[Category: | + | [[Category: Gabdulkhakov AG]] |
| - | [[Category: | + | [[Category: Garber MB]] |
| - | [[Category: Nikonov | + | [[Category: Nikonov OS]] |
| - | [[Category: | + | [[Category: Nikonov SV]] |
| - | [[Category: | + | [[Category: Nikulin AD]] |
| - | [[Category: | + | [[Category: Stolboushkina EA]] |
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Current revision
Gamma subunit of the translation initiation factor 2 from Sulfolobus solfataricus in complex with GDP and formate ion mimic aIF2gamma*GDP*Pi complex (a formate ion substitutes for Pi)
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