9pr4: Difference between revisions
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New page: '''Unreleased structure''' The entry 9pr4 is ON HOLD Authors: Wang, S., Xiong, Y., Zhang, Y. Description: In Situ Structure of the Human Mitochondrial Large Subunit 39S in Complex with... |
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==In Situ Structure of the Human Mitochondrial Large Subunit 39S in Complex with TACO1== | |||
<StructureSection load='9pr4' size='340' side='right'caption='[[9pr4]], [[Resolution|resolution]] 2.77Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[9pr4]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9PR4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9PR4 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]] 2.77Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1MA:6-HYDRO-1-METHYLADENOSINE-5-MONOPHOSPHATE'>1MA</scene>, <scene name='pdbligand=2MG:2N-METHYLGUANOSINE-5-MONOPHOSPHATE'>2MG</scene>, <scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=OMG:O2-METHYLGUANOSINE-5-MONOPHOSPHATE'>OMG</scene>, <scene name='pdbligand=OMU:O2-METHYLURIDINE+5-MONOPHOSPHATE'>OMU</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene>, <scene name='pdbligand=PUT:1,4-DIAMINOBUTANE'>PUT</scene>, <scene name='pdbligand=SPD:SPERMIDINE'>SPD</scene>, <scene name='pdbligand=VAL:VALINE'>VAL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=9pr4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9pr4 OCA], [https://pdbe.org/9pr4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9pr4 RCSB], [https://www.ebi.ac.uk/pdbsum/9pr4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9pr4 ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Translation elongation is a universally conserved step in protein synthesis, relying on elongation factors that engage the ribosomal L7/L12 stalk to mediate aminoacyl-tRNA delivery, accommodation, and ribosomal translocation. Using in organello cryo-electron microscopy, we reveal how the mitochondrial translation accelerator TACO1 promotes efficient elongation on human mitoribosomes. TACO1 binds the mitoribosomal region typically bound by elongation factor Tu (mtEF-Tu), bridging the large and small subunits via contacts with 16S rRNA, bL12m, A-site tRNA, and uS12m. While active throughout elongation, TACO1 is especially critical when translating polyproline motifs. Its absence prolongs mtEF-Tu residence in A/T states, causes persistent mitoribosomal stalling and premature subunit dissociation. Structural analyses indicate that TACO1 competes with mtEF-Tu for mitoribosome binding, stabilizes A-site tRNA, and enhances peptidyl transfer through a mechanism distinct from EF-P and eIF5A. These findings suggest that bacterial TACO1 orthologs may serve analogous roles, highlighting an evolutionarily conserved strategy for maintaining elongation efficiency during challenging translation events. | |||
Structural basis of TACO1-mediated efficient mitochondrial translation.,Wang S, Brischigliaro M, Zhang Y, Wu C, Zheng W, Barrientos A, Xiong Y Nat Commun. 2026 Feb 9. doi: 10.1038/s41467-026-69156-y. PMID:41663403<ref>PMID:41663403</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: Wang | <div class="pdbe-citations 9pr4" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: | <references/> | ||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Wang S]] | |||
[[Category: Xiong Y]] | |||
[[Category: Zhang Y]] | |||
Latest revision as of 07:14, 18 February 2026
In Situ Structure of the Human Mitochondrial Large Subunit 39S in Complex with TACO1
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