5d1n
From Proteopedia
(Difference between revisions)
(New page: '''Unreleased structure''' The entry 5d1n is ON HOLD Authors: Witek, M.A., Conn, G.L. Description: Crystal structure of the 16S rRNA (adenine(1408)-N(1))-methyltransferase with its rea...) |
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of the 16S rRNA (adenine(1408)-N(1))-methyltransferase with its reaction by-product SAH from Catenulisporales acidiphilia== | |
| + | <StructureSection load='5d1n' size='340' side='right'caption='[[5d1n]], [[Resolution|resolution]] 2.71Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5d1n]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Catenulispora_acidiphila_DSM_44928 Catenulispora acidiphila DSM 44928]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5D1N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5D1N FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.713Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</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=5d1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5d1n OCA], [https://pdbe.org/5d1n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5d1n RCSB], [https://www.ebi.ac.uk/pdbsum/5d1n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5d1n ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/C7Q5P8_CATAD C7Q5P8_CATAD] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Methylation of the bacterial small ribosomal subunit (16S) rRNA on the N1 position of A1408 confers exceptionally high-level resistance to a broad spectrum of aminoglycoside antibiotics. Here, we present a detailed structural and functional analysis of the Catenulisporales acidiphilia 16S rRNA (m(1)A1408) methyltransferase ('CacKam'). The apo CacKam structure closely resembles other m(1)A1408 methyltransferases within its conserved SAM-binding fold but the region linking core beta strands 6 and 7 (the 'beta6/7 linker') has a unique, extended structure that partially occludes the putative 16S rRNA binding surface, and sequesters the conserved and functionally critical W203 outside of the CacKam active site. Substitution of conserved residues in the SAM binding pocket reveals a functional dichotomy in the 16S rRNA (m(1)A1408) methyltransferase family, with two apparently distinct molecular mechanisms coupling cosubstrate/ substrate binding to catalytic activity. Our results additionally suggest that CacKam exploits the W203-mediated remodeling of the beta6/7 linker as a novel mechanism to control 30S substrate recognition and enzymatic turnover. | ||
| - | + | Functional dichotomy in the 16S rRNA (m1A1408) methyltransferase family and control of catalytic activity via a novel tryptophan mediated loop reorganization.,Witek MA, Conn GL Nucleic Acids Res. 2016 Jan 8;44(1):342-53. doi: 10.1093/nar/gkv1306. Epub 2015, Nov 24. PMID:26609134<ref>PMID:26609134</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 5d1n" style="background-color:#fffaf0;"></div> |
| - | [[Category: Conn | + | == References == |
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Catenulispora acidiphila DSM 44928]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Conn GL]] | ||
| + | [[Category: Witek MA]] | ||
Current revision
Crystal structure of the 16S rRNA (adenine(1408)-N(1))-methyltransferase with its reaction by-product SAH from Catenulisporales acidiphilia
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