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| | ==Crystal structure of Bacillus subtilis MazF in complex with RNA== | | ==Crystal structure of Bacillus subtilis MazF in complex with RNA== |
| - | <StructureSection load='4mdx' size='340' side='right' caption='[[4mdx]], [[Resolution|resolution]] 1.50Å' scene=''> | + | <StructureSection load='4mdx' size='340' side='right'caption='[[4mdx]], [[Resolution|resolution]] 1.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4mdx]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacsu Bacsu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MDX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4MDX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4mdx]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis_subsp._subtilis_str._168 Bacillus subtilis subsp. subtilis str. 168]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MDX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MDX FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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]] 1.5Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DU:2-DEOXYURIDINE-5-MONOPHOSPHATE'>DU</scene></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BSU04660, mazF, ndoA, ydcE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=224308 BACSU])</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=4mdx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mdx OCA], [https://pdbe.org/4mdx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mdx RCSB], [https://www.ebi.ac.uk/pdbsum/4mdx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mdx ProSAT]</span></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=4mdx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mdx OCA], [http://pdbe.org/4mdx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4mdx RCSB], [http://www.ebi.ac.uk/pdbsum/4mdx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4mdx ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ENDOA_BACSU ENDOA_BACSU]] Toxic component of a toxin-antitoxin (TA) module. Has specificity for UACAU sequences, claving after the first U and yielding cleavage products with 3' phosphate and 5' hydroxyl groups. Overexpression is toxic for cell growth, probably by inhibiting protein synthesis through the cleavage of single-stranded RNA. The toxicity is reversed by the antitoxin EndoAI. Toxin activity cannot be inhibited by MazE from E.coli.<ref>PMID:15882409</ref> <ref>PMID:21763692</ref> | + | [https://www.uniprot.org/uniprot/ENDOA_BACSU ENDOA_BACSU] Toxic component of a toxin-antitoxin (TA) module. Has specificity for UACAU sequences, claving after the first U and yielding cleavage products with 3' phosphate and 5' hydroxyl groups. Overexpression is toxic for cell growth, probably by inhibiting protein synthesis through the cleavage of single-stranded RNA. The toxicity is reversed by the antitoxin EndoAI. Toxin activity cannot be inhibited by MazE from E.coli.<ref>PMID:15882409</ref> <ref>PMID:21763692</ref> |
| - | <div style="background-color:#fffaf0;">
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| - | == Publication Abstract from PubMed ==
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| - | MazF is an mRNA interferase, which, upon activation during stress conditions, cleaves mRNAs in a sequence-specific manner, resulting in cellular growth arrest. During normal growth conditions, the MazF toxin is inactivated through binding to its cognate antitoxin, MazE. How MazF specifically recognizes its mRNA target and carries out cleavage and how the formation of the MazE-MazF complex inactivates MazF remain unclear. We present crystal structures of MazF in complex with mRNA substrate and antitoxin MazE in Bacillus subtilis. The structure of MazF in complex with uncleavable UUdUACAUAA RNA substrate defines the molecular basis underlying the sequence-specific recognition of UACAU and the role of residues involved in the cleavage through site-specific mutational studies. The structure of the heterohexameric (MazF)2-(MazE)2-(MazF)2 complex in Bacillus subtilis, supplemented by mutational data, demonstrates that the positioning of the C-terminal helical segment of MazE within the RNA-binding channel of the MazF dimer prevents mRNA binding and cleavage by MazF.
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| - | Structural Basis of mRNA Recognition and Cleavage by Toxin MazF and Its Regulation by Antitoxin MazE in Bacillus subtilis.,Simanshu DK, Yamaguchi Y, Park JH, Inouye M, Patel DJ Mol Cell. 2013 Oct 8. pii: S1097-2765(13)00676-X. doi:, 10.1016/j.molcel.2013.09.006. PMID:24120662<ref>PMID:24120662</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | <div class="pdbe-citations 4mdx" style="background-color:#fffaf0;"></div>
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| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacsu]] | + | [[Category: Bacillus subtilis subsp. subtilis str. 168]] |
| - | [[Category: Patel, D J]] | + | [[Category: Large Structures]] |
| - | [[Category: Simanshu, D K]] | + | [[Category: Patel DJ]] |
| - | [[Category: Antitoxin]] | + | [[Category: Simanshu DK]] |
| - | [[Category: Endoa]]
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| - | [[Category: Hydrolase-rna complex]]
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| - | [[Category: Maze]]
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| - | [[Category: Mazf]]
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| - | [[Category: Mrna interferase]]
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| - | [[Category: Toxin]]
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| - | [[Category: Toxin-antitoxin complex]]
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| - | [[Category: Toxin-mrna complex]]
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| - | [[Category: Ydce]]
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