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The | ==Mechanism of eIF6 release from the nascent 60S ribosomal subunit== | ||
<SX load='5anb' size='340' side='right' viewer='molstar' caption='[[5anb]], [[Resolution|resolution]] 4.10Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5anb]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Dictyostelium_discoideum Dictyostelium discoideum] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ANB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5ANB FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 4.1Å</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=5anb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5anb OCA], [https://pdbe.org/5anb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5anb RCSB], [https://www.ebi.ac.uk/pdbsum/5anb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5anb ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/RL3_DICDI RL3_DICDI] The L3 protein is a component of the large subunit of cytoplasmic ribosomes. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
SBDS protein (deficient in the inherited leukemia-predisposition disorder Shwachman-Diamond syndrome) and the GTPase EFL1 (an EF-G homolog) activate nascent 60S ribosomal subunits for translation by catalyzing eviction of the antiassociation factor eIF6 from nascent 60S ribosomal subunits. However, the mechanism is completely unknown. Here, we present cryo-EM structures of human SBDS and SBDS-EFL1 bound to Dictyostelium discoideum 60S ribosomal subunits with and without endogenous eIF6. SBDS assesses the integrity of the peptidyl (P) site, bridging uL16 (mutated in T-cell acute lymphoblastic leukemia) with uL11 at the P-stalk base and the sarcin-ricin loop. Upon EFL1 binding, SBDS is repositioned around helix 69, thus facilitating a conformational switch in EFL1 that displaces eIF6 by competing for an overlapping binding site on the 60S ribosomal subunit. Our data reveal the conserved mechanism of eIF6 release, which is corrupted in both inherited and sporadic leukemias. | |||
Mechanism of eIF6 release from the nascent 60S ribosomal subunit.,Weis F, Giudice E, Churcher M, Jin L, Hilcenko C, Wong CC, Traynor D, Kay RR, Warren AJ Nat Struct Mol Biol. 2015 Nov;22(11):914-9. doi: 10.1038/nsmb.3112. Epub 2015 Oct, 19. PMID:26479198<ref>PMID:26479198</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 5anb" style="background-color:#fffaf0;"></div> | ||
[[Category: | |||
[[Category: | ==See Also== | ||
[[Category: Hilcenko | *[[Eukaryotic initiation factor 3D structures|Eukaryotic initiation factor 3D structures]] | ||
[[Category: Jin | *[[Ribosome 3D structures|Ribosome 3D structures]] | ||
[[Category: | *[[Shwachman-Bodian-Diamond Syndrome Protein|Shwachman-Bodian-Diamond Syndrome Protein]] | ||
[[Category: | == References == | ||
[[Category: Warren | <references/> | ||
[[Category: | __TOC__ | ||
</SX> | |||
[[Category: Dictyostelium discoideum]] | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Churcher M]] | |||
[[Category: Giudice E]] | |||
[[Category: Hilcenko C]] | |||
[[Category: Jin L]] | |||
[[Category: Kay RR]] | |||
[[Category: Traynor D]] | |||
[[Category: Warren AJ]] | |||
[[Category: Weis F]] | |||
[[Category: Wong CC]] | |||
Latest revision as of 14:42, 9 May 2024
Mechanism of eIF6 release from the nascent 60S ribosomal subunitMechanism of eIF6 release from the nascent 60S ribosomal subunit
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