4cxg: Difference between revisions
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==Regulation of the mammalian elongation cycle by 40S subunit rolling: a eukaryotic-specific ribosome rearrangement== | ==Regulation of the mammalian elongation cycle by 40S subunit rolling: a eukaryotic-specific ribosome rearrangement== | ||
<StructureSection load='4cxg' size='340' side='right' caption='[[4cxg]], [[Resolution|resolution]] 8.70Å' scene=''> | <StructureSection load='4cxg' size='340' side='right'caption='[[4cxg]], [[Resolution|resolution]] 8.70Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4cxg]] is a 9 chain structure with sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CXG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4CXG FirstGlance]. <br> | <table><tr><td colspan='2'>[[4cxg]] is a 9 chain structure with sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CXG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4CXG FirstGlance]. <br> | ||
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</div> | </div> | ||
<div class="pdbe-citations 4cxg" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 4cxg" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Elongation factor 3D structures|Elongation factor 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Oryctolagus cuniculus]] | [[Category: Oryctolagus cuniculus]] | ||
[[Category: Behrmann, E]] | [[Category: Behrmann, E]] | ||
Revision as of 10:13, 26 June 2019
Regulation of the mammalian elongation cycle by 40S subunit rolling: a eukaryotic-specific ribosome rearrangementRegulation of the mammalian elongation cycle by 40S subunit rolling: a eukaryotic-specific ribosome rearrangement
Structural highlights
Publication Abstract from PubMedThe extent to which bacterial ribosomes and the significantly larger eukaryotic ribosomes share the same mechanisms of ribosomal elongation is unknown. Here, we present subnanometer resolution cryoelectron microscopy maps of the mammalian 80S ribosome in the posttranslocational state and in complex with the eukaryotic eEF1AVal-tRNAGMPPNP ternary complex, revealing significant differences in the elongation mechanism between bacteria and mammals. Surprisingly, and in contrast to bacterial ribosomes, a rotation of the small subunit around its long axis and orthogonal to the well-known intersubunit rotation distinguishes the posttranslocational state from the classical pretranslocational state ribosome. We term this motion "subunit rolling." Correspondingly, a mammalian decoding complex visualized in substates before and after codon recognition reveals structural distinctions from the bacterial system. These findings suggest how codon recognition leads to GTPase activation in the mammalian system and demonstrate that in mammalia subunit rolling occurs during tRNA selection. Regulation of the Mammalian elongation cycle by subunit rolling: a eukaryotic-specific ribosome rearrangement.,Budkevich TV, Giesebrecht J, Behrmann E, Loerke J, Ramrath DJ, Mielke T, Ismer J, Hildebrand PW, Tung CS, Nierhaus KH, Sanbonmatsu KY, Spahn CM Cell. 2014 Jul 3;158(1):121-31. doi: 10.1016/j.cell.2014.04.044. PMID:24995983[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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