1x7p

<StructureSection load='1x7p' size='340' side='right' caption='[[1x7p]], [[Resolution|resolution]] 2.55&Aring;' scene=''>

<table><tr><td colspan='2'>[[1x7p]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"actinomyces_viridochromogenes"_krainsky_1914 "actinomyces viridochromogenes" krainsky 1914]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X7P OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1X7P FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1x7o|1x7o]]</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=1x7p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x7p OCA], [http://pdbe.org/1x7p PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1x7p RCSB], [http://www.ebi.ac.uk/pdbsum/1x7p PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1x7p ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/AVRB_STRVR AVRB_STRVR]] Specifically methylates the 2'-O-ribose position of uridine-2479 in 23S ribosomal RNA. Confers resistance to antibiotic avilamycin, an orthosomycin antibiotic.<ref>PMID:11181344</ref> <ref>PMID:12828631</ref>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/x7/1x7p_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

The emergence of antibiotic-resistant bacterial strains is a widespread problem in medical practice and drug design, and each case requires the elucidation of the underlying mechanism. AviRb from Streptomyces viridochromogenes methylates the 2'-O atom of U2479 of the 23S ribosomal RNA in Gram-positive bacteria and thus mediates resistance to the oligosaccharide (orthosomycin) antibiotic avilamycin. The structure of AviRb with and without bound cofactor S-adenosyl-L-methionine (AdoMet) was determined, showing that it is a homodimer belonging to the SpoU family within the SPOUT class of methyltransferases. The relationships within this class were analyzed in detail and, in addition, a novel fourth SpoU sequence fingerprint is proposed. Each subunit of AviRb consists of two domains. The N-terminal domain, being related to the ribosomal proteins L30 and L7Ae, is likely to bind RNA. The C-terminal domain is related to all SPOUT methyltransferases, and is responsible for AdoMet-binding, catalysis and dimerization. The cofactor binds at the characteristic knot of the polypeptide in an unusually bent conformation. The transferred methyl group points to a broad cleft formed with the L30-type domain of the other subunit. Measurements of mutant activity revealed four important residues responsible for catalysis and allowed the modeling of a complex between AviRb and the RNA target. The model includes a specificity pocket for uracil but does not contain a base for deprotonating the 2'-O atom of U2479 on methylation.

Structure and function of the antibiotic resistance-mediating methyltransferase AviRb from Streptomyces viridochromogenes.,Mosbacher TG, Bechthold A, Schulz GE J Mol Biol. 2005 Jan 21;345(3):535-45. PMID:15581897<ref>PMID:15581897</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1x7p" style="background-color:#fffaf0;"></div>

[[Category: Actinomyces viridochromogenes krainsky 1914]]

[[Category: Bechthold, A]]

[[Category: Mosbacher, T G]]

[[Category: Schulz, G E]]

[[Category: Bound cofactor adomet]]

[[Category: Transferase]]