2a6r
From Proteopedia
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<StructureSection load='2a6r' size='340' side='right'caption='[[2a6r]], [[Resolution|resolution]] 2.05Å' scene=''> | <StructureSection load='2a6r' size='340' side='right'caption='[[2a6r]], [[Resolution|resolution]] 2.05Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[2a6r]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/ | + | <table><tr><td colspan='2'>[[2a6r]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A6R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A6R FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> |
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2a6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a6r OCA], [https://pdbe.org/2a6r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a6r RCSB], [https://www.ebi.ac.uk/pdbsum/2a6r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a6r ProSAT]</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=2a6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a6r OCA], [https://pdbe.org/2a6r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a6r RCSB], [https://www.ebi.ac.uk/pdbsum/2a6r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a6r ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| - | + | [https://www.uniprot.org/uniprot/YOEB_ECOLI YOEB_ECOLI] Toxic component of a toxin-antitoxin (TA) module. Its mode of function is controversial; it has been proposed to be an mRNA interferase but also an inhibitor of translation initiation. When overproduced in wild-type cells, inhibits bacterial growth and translation by cleavage of mRNA molecules while it has a weak effect on colony forming ability. Overproduction of Lon protease specifically activates YoeB-dependent mRNA cleavage, leading to lethality. YefM binds to the promoter region of the yefM-yeoB operon to repress transcription, YeoB acts as a corepressor.<ref>PMID:14672926</ref> <ref>PMID:15009896</ref> <ref>PMID:17170003</ref> <ref>PMID:18854355</ref> <ref>PMID:19028895</ref> <ref>PMID:19124462</ref> <ref>PMID:19400780</ref> <ref>PMID:16109374</ref> Shown in vitro to be an mRNA interferase that requires translation for substrate cleavage; if the mRNA is mutated so as to not be translatable it is no longer cleaved. Cleavage only occurs within translated regions. Has RNase activity and preferentially cleaves at the 3'-end of purine ribonucleotides.<ref>PMID:14672926</ref> <ref>PMID:15009896</ref> <ref>PMID:17170003</ref> <ref>PMID:18854355</ref> <ref>PMID:19028895</ref> <ref>PMID:19124462</ref> <ref>PMID:19400780</ref> <ref>PMID:16109374</ref> Also shown in vitro to be a translation initiation blocker. Binds to the 70S ribosome and 50S ribosomal subunit; binding is inhibited by hygromycin A and tetracycline, both of which bind to the 30S subunit in the A site. Thus YoeB is located at the interface between 50S and 30S ribosomes and interacts with the A site where it cleaves mRNA, blocking translation initiation.<ref>PMID:14672926</ref> <ref>PMID:15009896</ref> <ref>PMID:17170003</ref> <ref>PMID:18854355</ref> <ref>PMID:19028895</ref> <ref>PMID:19124462</ref> <ref>PMID:19400780</ref> <ref>PMID:16109374</ref> | |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Escherichia coli]] |
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Hanaoka | + | [[Category: Hanaoka F]] |
| - | [[Category: Kamada | + | [[Category: Kamada K]] |
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Current revision
Crystal structure of YoeB under PEG condition
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