View source for 6hez


==M tuberculosis DprE1 in complex with BTZ043==
<StructureSection load='6hez' size='340' side='right' caption='[[6hez]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6hez]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6HEZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6HEZ FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=0SK:8-(HYDROXYAMINO)-2-[(2S)-2-METHYL-1,4-DIOXA-8-AZASPIRO[4.5]DEC-8-YL]-6-(TRIFLUOROMETHYL)-4H-1,3-BENZOTHIAZIN-4-ONE'>0SK</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=IMD:IMIDAZOLE'>IMD</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dprE1, Rv3790 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Decaprenylphospho-beta-D-ribofuranose_2-oxidase Decaprenylphospho-beta-D-ribofuranose 2-oxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.98.3 1.1.98.3] </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=6hez FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hez OCA], [http://pdbe.org/6hez PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6hez RCSB], [http://www.ebi.ac.uk/pdbsum/6hez PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6hez ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/DPRE1_MYCTU DPRE1_MYCTU]] Involved in the epimerization of decaprenylphosphoryl ribose (DPR) to decaprenylphosphoryl arabinose (DPA) a precursor for arabinan synthesis in mycobacterial cell wall biosynthesis. Probably catalyzes the oxidation at C-2 of decaprenylphosphoryl ribose (DPR) to yield decaprenylphosphoryl 2-keto-ribose (DPX).<ref>PMID:16291675</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Nitro-substituted 1,3-benzothiazinones (nitro-BTZs) are mechanism-based covalent inhibitors of Mycobacterium tuberculosis decaprenylphosphoryl-beta-D-ribose-2'-oxidase (DprE1) with strong antimycobacterial properties. We prepared a number of oxidized and reduced forms of nitro-BTZs to probe the mechanism of inactivation of the enzyme and to identify opportunities for further chemistry. The kinetics of inactivation of DprE1 was examined using an enzymatic assay that monitored reaction progress up to 100 min, permitting compound ranking according to kinact/Ki values. The side-chain at the 2-position and heteroatom identity at the 1-position of the BTZs were found to be important for inhibitory activity. We obtained crystal structures with several compounds covalently bound. The data suggest that steps upstream from the covalent end-points are likely the key determinants of potency and reactivity. The results of protein mass spectrometry using a 7-chloro-nitro-BTZ suggest that nucleophilic reactions at the 7-position do not operate and support a previously proposed mechanism in which BTZ activation by a reduced flavin intermediate is required. Unexpectedly, a hydroxylamino-BTZ showed time-dependent inhibition and mass spectrometry corroborated that this hydroxylamino-BTZ is a mechanism-based suicide inhibitor of DprE1. With this BTZ derivative, we propose a new covalent mechanism of inhibition of DprE1 that takes advantage of the oxidation cycle of the enzyme.

Novel insight into the reaction of nitro, nitroso and hydroxylamino benzothiazinones and of benzoxacinones with Mycobacterium tuberculosis DprE1.,Richter A, Rudolph I, Mollmann U, Voigt K, Chung CW, Singh OMP, Rees M, Mendoza-Losana A, Bates R, Ballell L, Batt S, Veerapen N, Futterer K, Besra G, Imming P, Argyrou A Sci Rep. 2018 Sep 7;8(1):13473. doi: 10.1038/s41598-018-31316-6. PMID:30194385<ref>PMID:30194385</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6hez" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Decaprenylphospho-beta-D-ribofuranose 2-oxidase]]
[[Category: Batt, S M]]
[[Category: Besra, G S]]
[[Category: Futterer, K]]
[[Category: Arabinan biosynthetic process]]
[[Category: Flavoprotein]]
[[Category: Isomerase]]
[[Category: Oxidation-reduction process]]