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1q74

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(New page: 200px<br /><applet load="1q74" size="450" color="white" frame="true" align="right" spinBox="true" caption="1q74, resolution 1.70&Aring;" /> '''The Crystal Structur...)
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[[Image:1q74.gif|left|200px]]<br /><applet load="1q74" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1q74, resolution 1.70&Aring;" />
 
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'''The Crystal Structure of 1D-myo-inosityl 2-acetamido-2-deoxy-alpha-D-glucopyranoside Deacetylase (MshB)'''<br />
 
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==Overview==
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==The Crystal Structure of 1D-myo-inositol 2-acetamido-2-deoxy-alpha-D-glucopyranoside Deacetylase (MshB)==
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The C2-symmetric vinyl sulfoxide, trans-2-methylene-1,3-dithiolane, 1,3-dioxide, was found to react with a range of 3-oxidopyridinium betaines, (bearing different substituents on nitrogen) in high yield and with total, diastereoselectivity. A 2.3:1 mixture of regioisomers was formed with all, of the 3-oxidopyridinium betaines but the ratio was found to change over, prolonged periods of time due to reversibility of the minor regioisomer., 3-Oxidopyridinium betaines bearing methyl substituents at either the 2- or, 6-position were also tested in the cycloaddition process. Improved, regioselectivity (8:1) and again high diastereoselectivity were observed, with the betaine having an additional substituent at the 2-position, but, with betaines having a substituent in the 6-position although high, regioselectivity was observed (9.9:1), the major isomer was formed with, low diastereoselectivity (5.5:4.4). The origin of the regio- and, diastereo-selectivity with all the betaines is discussed. Finally, the, C2-symmetric vinyl sulfoxide, trans-2-methylene-1,3-dithiolane 1,3-dioxide, was reacted with an oxidopyrylium betaine in moderate yield. Good, regioselectivity and moderate diastereoselectivity were observed.
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<StructureSection load='1q74' size='340' side='right'caption='[[1q74]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1q74]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q74 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Q74 FirstGlance]. <br>
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1Q74 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis] with ZN and PE4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1Q74 OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PE4:2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL'>PE4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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==Reference==
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1q74 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q74 OCA], [https://pdbe.org/1q74 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1q74 RCSB], [https://www.ebi.ac.uk/pdbsum/1q74 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1q74 ProSAT], [https://www.topsan.org/Proteins/TBSGC/1q74 TOPSAN]</span></td></tr>
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Highly diastereoselective 1,3-dipolar cycloaddition reactions of trans-2-methylene-1,3-dithiolane 1,3-dioxide with 3-oxidopyridinium and 3-oxidopyrylium betaines: a route to the tropane skeleton., Aggarwal VK, Grainger RS, Newton GK, Spargo PL, Hobson AD, Adams H, Org Biomol Chem. 2003 Jun 7;1(11):1884-93. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12945769 12945769]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/MSHB_MYCTU MSHB_MYCTU] Catalyzes the deacetylation of 1D-myo-inositol 2-acetamido-2-deoxy-alpha-D-glucopyranoside (GlcNAc-Ins) in the mycothiol (MSH) biosynthesis pathway. Shows some amidase activity toward S-conjugates of mycothiol.<ref>PMID:11092856</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q7/1q74_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1q74 ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Mycobacterium tuberculosis]]
[[Category: Mycobacterium tuberculosis]]
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[[Category: Single protein]]
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[[Category: Arad D]]
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[[Category: Arad, D.]]
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[[Category: Av-Gay Y]]
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[[Category: Av-Gay, Y.]]
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[[Category: Cherney MM]]
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[[Category: Cherney, M.M.]]
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[[Category: Fahey RC]]
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[[Category: Fahey, R.C.]]
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[[Category: Garen C]]
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[[Category: Garen, C.]]
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[[Category: James MN]]
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[[Category: James, M.N.]]
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[[Category: Maynes JT]]
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[[Category: Maynes, J.T.]]
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[[Category: Newton G]]
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[[Category: Newton, G.]]
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[[Category: TBSGC, TB.Structural.Genomics.Consortium.]]
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[[Category: PE4]]
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[[Category: ZN]]
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[[Category: protein structure initiative]]
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[[Category: psi]]
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[[Category: rossmann fold]]
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[[Category: structural genomics]]
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[[Category: tb structural genomics consortium]]
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[[Category: tbsgc]]
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[[Category: zinc aminohydrolase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 25 03:40:23 2007''
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Current revision

The Crystal Structure of 1D-myo-inositol 2-acetamido-2-deoxy-alpha-D-glucopyranoside Deacetylase (MshB)

PDB ID 1q74

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