2b3d

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{{STRUCTURE_2b3d| PDB=2b3d | SCENE= }}
{{STRUCTURE_2b3d| PDB=2b3d | SCENE= }}
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'''Crystal structure of Modulator of Drug activity B in complex with flavin adenine dinucleotide'''
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===Crystal structure of Modulator of Drug activity B in complex with flavin adenine dinucleotide===
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==Overview==
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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.
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The line below this paragraph, {{ABSTRACT_PUBMED_16630630}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 16630630 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16630630}}
==About this Structure==
==About this Structure==
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[[Category: Modulator of drug activity b]]
[[Category: Modulator of drug activity b]]
[[Category: Quinone]]
[[Category: Quinone]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:48:04 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 20:15:29 2008''

Revision as of 17:15, 27 July 2008

Image:2b3d.png

Template:STRUCTURE 2b3d

Crystal structure of Modulator of Drug activity B in complex with flavin adenine dinucleotide

Template:ABSTRACT PUBMED 16630630

About this Structure

2B3D is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

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

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