View source for 3dul


==Crystal Structure Analysis of the O-methyltransferase from Bacillus cereus==
<StructureSection load='3dul' size='340' side='right'caption='[[3dul]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3dul]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_cereus_ATCC_10987 Bacillus cereus ATCC 10987]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3DUL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3DUL 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]] 1.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=3dul FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3dul OCA], [https://pdbe.org/3dul PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3dul RCSB], [https://www.ebi.ac.uk/pdbsum/3dul PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3dul ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q739U3_BACC1 Q739U3_BACC1] 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/du/3dul_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3dul ConSurf].
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== Publication Abstract from PubMed ==
The specific substrates, mechanisms, and structures of the bacterial O-methyltransferases (OMTs) are not as well characterized as those of other OMTs. Recent studies have suggested that bacterial OMTs catalyze regiospecific reactions that might be used to produce novel compounds. In this study, we investigated the structural and functional features of an OMT from Bacillus cereus (BcOMT2). This enzyme catalyzes the O-methylation of flavonoids in vitro in an S-adenosylmethionine-dependent and regiospecific manner. We solved the crystal structures of the BcOMT2 apoenzyme and the BcOMT2-S-adenosylhomocysteine (SAH) co-complex at resolutions of 1.8 and 1.2 A, respectively. These structures reveal that the overall structure of dimeric BcOMT2 is similar to that of the canonical OMT but that BcOMT2 also has a unique N-terminal helical region that is responsible for dimerization. The binding of SAH causes both local and remote conformational changes in the dimer interface that stabilize the dimerization of BcOMT2. SAH binding also causes ordering of residues Glu171 to Gly186, which are disordered in the apoenzyme structure and are known determinants of substrate specificity, and thus contributes to formation of the substrate binding pocket. Our structural analysis indicated a resemblance between the active site of BcOMT2 and that of metal-dependent OMTs. Using mutational analysis, we confirmed that BcOMT2 is a Mg(2+)-dependent OMT. These results provide structural and functional insights into the dimerization mechanism and substrate specificity of BcOMT2.

Structural and functional insights into O-methyltransferase from Bacillus cereus.,Cho JH, Park Y, Ahn JH, Lim Y, Rhee S J Mol Biol. 2008 Oct 17;382(4):987-97. Epub 2008 Aug 5. PMID:18706426<ref>PMID:18706426</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 3dul" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Bacillus cereus ATCC 10987]]
[[Category: Large Structures]]
[[Category: Cho J-H]]
[[Category: Rhee S]]