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New page: left|200px<br /><applet load="2amj" size="350" color="white" frame="true" align="right" spinBox="true" caption="2amj, resolution 1.80Å" /> '''Crystal Structure of... |
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== | ==Crystal Structure of Modulator of Drug Activity B from Escherichia coli O157:H7== | ||
Modulator of drug activity B (MdaB) is a putative member of the | <StructureSection load='2amj' size='340' side='right'caption='[[2amj]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2amj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_O157:H7 Escherichia coli O157:H7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AMJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AMJ 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]] 1.8Å</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=2amj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2amj OCA], [https://pdbe.org/2amj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2amj RCSB], [https://www.ebi.ac.uk/pdbsum/2amj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2amj ProSAT], [https://www.topsan.org/Proteins/BSGI/2amj TOPSAN]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/MDAB_ECO57 MDAB_ECO57] | |||
== 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/am/2amj_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=2amj ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Modulator of drug activity B (MdaB) is a putative member of the DT-diaphorase family of NAD(P)H:oxidoreductases that afford cellular protection against quinonoid compounds. While there have been extensive investigations of mammalian homologues, putative prokaryotic members of this enzyme family have received little attention. The three-dimensional crystal structure of apo-MdaB reported herein exhibits significant structural similarity to a number of flavoproteins, including the mammalian DT-diaphorases. We have shown by mass spectrometry that the endogenously associated cofactor is flavin adenine dinucleotide and we present here the structure of MdaB in complex with this compound. Growth of Escherichia coli carrying null mutations in the genes encoding MdaB or quinol monooxygenase, the gene for which shares the mdaB promoter, were not affected by the presence of menadione. However, over-expression of recombinant quinol monooxygenase conferred a state of resistance against both tetracycline and adriamycin. This work suggests that the redox cycle formed by these proteins protects E. coli from the toxic effects of polyketide compounds rather than the oxidative stress of menadione alone. | |||
Modulator of drug activity B from Escherichia coli: crystal structure of a prokaryotic homologue of DT-diaphorase.,Adams MA, Jia Z J Mol Biol. 2006 Jun 2;359(2):455-65. Epub 2006 Apr 7. PMID:16630630<ref>PMID:16630630</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
[[Category: Escherichia coli | <div class="pdbe-citations 2amj" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: Adams | <references/> | ||
__TOC__ | |||
[[Category: Jia | </StructureSection> | ||
[[Category: Escherichia coli O157:H7]] | |||
[[Category: Large Structures]] | |||
[[Category: Adams MA]] | |||
[[Category: Jia Z]] | |||
Latest revision as of 11:18, 15 May 2024
Crystal Structure of Modulator of Drug Activity B from Escherichia coli O157:H7Crystal Structure of Modulator of Drug Activity B from Escherichia coli O157:H7
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedModulator of drug activity B (MdaB) is a putative member of the DT-diaphorase family of NAD(P)H:oxidoreductases that afford cellular protection against quinonoid compounds. While there have been extensive investigations of mammalian homologues, putative prokaryotic members of this enzyme family have received little attention. The three-dimensional crystal structure of apo-MdaB reported herein exhibits significant structural similarity to a number of flavoproteins, including the mammalian DT-diaphorases. We have shown by mass spectrometry that the endogenously associated cofactor is flavin adenine dinucleotide and we present here the structure of MdaB in complex with this compound. Growth of Escherichia coli carrying null mutations in the genes encoding MdaB or quinol monooxygenase, the gene for which shares the mdaB promoter, were not affected by the presence of menadione. However, over-expression of recombinant quinol monooxygenase conferred a state of resistance against both tetracycline and adriamycin. This work suggests that the redox cycle formed by these proteins protects E. coli from the toxic effects of polyketide compounds rather than the oxidative stress of menadione alone. Modulator of drug activity B from Escherichia coli: crystal structure of a prokaryotic homologue of DT-diaphorase.,Adams MA, Jia Z J Mol Biol. 2006 Jun 2;359(2):455-65. Epub 2006 Apr 7. PMID:16630630[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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