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5hr7
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==X-ray crystal structure of C118A RlmN from Escherichia coli with cross-linked in vitro transcribed tRNA== | |
| + | <StructureSection load='5hr7' size='340' side='right' caption='[[5hr7]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5hr7]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HR7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5HR7 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=5AD:5-DEOXYADENOSINE'>5AD</scene>, <scene name='pdbligand=MET:METHIONINE'>MET</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene></td></tr> | ||
| + | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CAS:S-(DIMETHYLARSENIC)CYSTEINE'>CAS</scene>, <scene name='pdbligand=SMC:S-METHYLCYSTEINE'>SMC</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5hr6|5hr6]]</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/23S_rRNA_(adenine(2503)-C(2))-methyltransferase 23S rRNA (adenine(2503)-C(2))-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.192 2.1.1.192] </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=5hr7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hr7 OCA], [http://pdbe.org/5hr7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5hr7 RCSB], [http://www.ebi.ac.uk/pdbsum/5hr7 PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/RLMN_ECO24 RLMN_ECO24]] Specifically methylates position 2 of adenine 2503 in 23S rRNA and position 2 of adenine 37 in tRNAs. m2A2503 modification seems to play a crucial role in the proofreading step occurring at the peptidyl transferase center and thus would serve to optimize ribosomal fidelity. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | RlmN is a dual-specificity RNA methylase that modifies C2 of adenosine 2503 (A2503) in 23S rRNA and C2 of adenosine 37 (A37) in several Escherichia coli transfer RNAs (tRNAs). A related methylase, Cfr, modifies C8 of A2503 via a similar mechanism, conferring resistance to multiple classes of antibiotics. Here, we report the x-ray structure of a key intermediate in the RlmN reaction, in which a Cys(118)-->Ala variant of the protein is cross-linked to a tRNA(Glu)substrate through the terminal methylene carbon of a formerly methylcysteinyl residue and C2 of A37. RlmN contacts the entire length of tRNA(Glu), accessing A37 by using an induced-fit strategy that completely unfolds the tRNA anticodon stem-loop, which is likely critical for recognition of both tRNA and ribosomal RNA substrates. | ||
| - | + | Crystallographic capture of a radical S-adenosylmethionine enzyme in the act of modifying tRNA.,Schwalm EL, Grove TL, Booker SJ, Boal AK Science. 2016 Apr 15;352(6283):309-12. doi: 10.1126/science.aad5367. PMID:27081063<ref>PMID:27081063</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 5hr7" style="background-color:#fffaf0;"></div> |
| - | [[Category: | + | == References == |
| - | [[Category: Schwalm, E | + | <references/> |
| - | [[Category: | + | __TOC__ |
| + | </StructureSection> | ||
| + | [[Category: Boal, A K]] | ||
| + | [[Category: Booker, S J]] | ||
| + | [[Category: Grove, T L]] | ||
| + | [[Category: Schwalm, E L]] | ||
| + | [[Category: Iron-sulfur cluster]] | ||
| + | [[Category: Oxidoreductase-rna complex]] | ||
| + | [[Category: Protein-rna complex]] | ||
| + | [[Category: Radical sam enzyme]] | ||
| + | [[Category: Transfer rna]] | ||
Revision as of 17:10, 10 May 2016
X-ray crystal structure of C118A RlmN from Escherichia coli with cross-linked in vitro transcribed tRNA
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