5o95: Difference between revisions
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==Structure of the putative methyltransferase Lpg2936 from Legionella pneumophila== | |||
<StructureSection load='5o95' size='340' side='right' caption='[[5o95]], [[Resolution|resolution]] 1.49Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5o95]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5O95 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5O95 FirstGlance]. <br> | |||
</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/16S_rRNA_(uracil(1498)-N(3))-methyltransferase 16S rRNA (uracil(1498)-N(3))-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.193 2.1.1.193] </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=5o95 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5o95 OCA], [http://pdbe.org/5o95 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5o95 RCSB], [http://www.ebi.ac.uk/pdbsum/5o95 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5o95 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/Q5ZRE6_LEGPH Q5ZRE6_LEGPH]] Specifically methylates the N3 position of the uracil ring of uridine 1498 (m3U1498) in 16S rRNA. Acts on the fully assembled 30S ribosomal subunit.[PIRNR:PIRNR015601] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The methylation of U1498 located in the 16S ribosomal RNA of Escherichia coli is an important modification affecting ribosomal activity. RsmE methyltransferases methylate specifically this position in a mechanism that requires an S-adenosyl-L-methionine (AdoMet) molecule as cofactor. Here we report the structure of Apo and AdoMet-bound Lpg2936 from Legionella pneumophila at 1.5 and 2.3 A, respectively. The protein comprises an N-terminal PUA domain and a C-terminal SPOUT domain. The latter is responsible for protein dimerization and cofactor binding. Comparison with similar structures suggests that Lpg2936 is an RsmE-like enzyme that can target the equivalent of U1498 in the L. pneumophila ribosomal RNA, thereby potentially enhancing ribosomal activity during infection-mediated effector production. The multiple copies of the enzyme found in both structures reveal a flexible conformation of the bound AdoMet ligand. Isothermal titration calorimetry measurements suggest an asymmetric two site binding mode. Our results therefore also provide unprecedented insights into AdoMet/RsmE interaction, furthering our understanding of the RsmE catalytic mechanism. | |||
Crystal structure of the Legionella pneumophila Lpg2936 in complex with the cofactor S-adenosyl-L-methionine reveals novel insights into the mechanism of RsmE family methyltransferases.,Pinotsis N, Waksman G Protein Sci. 2017 Sep 22. doi: 10.1002/pro.3305. PMID:28940762<ref>PMID:28940762</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 5o95" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Pinotsis, N]] | |||
[[Category: Waksman, G]] | |||
[[Category: Rna methyltransferase]] | |||
[[Category: Rsme-like]] | |||
[[Category: Transferase]] | |||
Revision as of 07:34, 8 November 2017
Structure of the putative methyltransferase Lpg2936 from Legionella pneumophila
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