4k51: Difference between revisions

From Proteopedia
Jump to navigationJump to search
← Older edit
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
 
(2 intermediate revisions by the same user not shown)
Line 1: Line 1:
==Crystal Structure of the PCI domain of eIF3a==
==Crystal Structure of the PCI domain of eIF3a==
<StructureSection load='4k51' size='340' side='right' caption='[[4k51]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
<StructureSection load='4k51' size='340' side='right'caption='[[4k51]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4k51]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4K51 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4K51 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4k51]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4K51 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4K51 FirstGlance]. <br>
</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RPG1, TIF32, YBR079C, YBR0734 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</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]] 2.65&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4k51 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k51 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4k51 RCSB], [http://www.ebi.ac.uk/pdbsum/4k51 PDBsum]</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=4k51 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k51 OCA], [https://pdbe.org/4k51 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4k51 RCSB], [https://www.ebi.ac.uk/pdbsum/4k51 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4k51 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/EIF3A_YEAST EIF3A_YEAST]] Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome.<ref>PMID:9694884</ref> <ref>PMID:11387228</ref> <ref>PMID:12651896</ref> <ref>PMID:18765792</ref> 
[https://www.uniprot.org/uniprot/EIF3A_YEAST EIF3A_YEAST] Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome.<ref>PMID:9694884</ref> <ref>PMID:11387228</ref> <ref>PMID:12651896</ref> <ref>PMID:18765792</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Transfer of genetic information from genes into proteins is mediated by messenger RNA (mRNA) that must be first recruited to ribosomal pre-initiation complexes (PICs) by a mechanism that is still poorly understood. Recent studies showed that besides eIF4F and poly(A)-binding protein, eIF3 also plays a critical role in this process, yet the molecular mechanism of its action is unknown. We showed previously that the PCI domain of the eIF3c/NIP1 subunit of yeast eIF3 is involved in RNA binding. To assess the role of the second PCI domain of eIF3 present in eIF3a/TIF32, we performed its mutational analysis and identified a 10-Ala-substitution (Box37) that severely reduces amounts of model mRNA in the 43-48S PICs in vivo as the major, if not the only, detectable defect. Crystal structure analysis of the a/TIF32-PCI domain at 2.65-A resolution showed that it is required for integrity of the eIF3 core and, similarly to the c/NIP1-PCI, is capable of RNA binding. The putative RNA-binding surface defined by positively charged areas contains two Box37 residues, R363 and K364. Their substitutions with alanines severely impair the mRNA recruitment step in vivo suggesting that a/TIF32-PCI represents one of the key domains ensuring stable and efficient mRNA delivery to the PICs.
 
Structural integrity of the PCI domain of eIF3a/TIF32 is required for mRNA recruitment to the 43S pre-initiation complexes.,Khoshnevis S, Gunisova S, Vlckova V, Kouba T, Neumann P, Beznoskova P, Ficner R, Valasek LS Nucleic Acids Res. 2014 Jan 13. PMID:24423867<ref>PMID:24423867</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
==See Also==
</div>
*[[Eukaryotic initiation factor 3D structures|Eukaryotic initiation factor 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Baker's yeast]]
[[Category: Large Structures]]
[[Category: Ficner, R]]
[[Category: Saccharomyces cerevisiae S288C]]
[[Category: Khoshnevis, S]]
[[Category: Ficner R]]
[[Category: Neumann, P]]
[[Category: Khoshnevis S]]
[[Category: Biosynthetic protein]]
[[Category: Neumann P]]
[[Category: Eif3]]
[[Category: Pci domain]]
[[Category: Translation initiation]]
Retrieved from "https://proteopedia.org/4k51"