Metabolomics Reveal d-Alanine:d-Alanine Ligase As the Target of d-Cycloserine in Mycobacterium tuberculosis.

Metabolomics Reveal d-Alanine:d-Alanine Ligase As the Target of d-Cycloserine in Mycobacterium tuberculosis.
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DOI:
10.1021/ml400349n
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发表时间:
2013-12-12
影响因子:
4.2
通讯作者:
de Carvalho LP
de Carvalho LP
中科院分区:
医学3区
文献类型:
--
作者:
Prosser GA;de Carvalho LP

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Stable isotope-mass spectrometry (MS)-based metabolomic profiling is a powerful technique for following changes in specific metabolite pool sizes and metabolic flux under various experimental conditions in a test organism or cell type. Here, we use a metabolomics approach to interrogate the mechanism of antibiotic action of d-cycloserine (DCS), a second line antibiotic used in the treatment of multidrug resistant Mycobacterium tuberculosis infections. We use doubly labeled 13C α-carbon-2H l-alanine to allow tracking of both alanine racemase and d-alanine:d-alanine ligase activity in M. tuberculosis challenged with DCS and reveal that d-alanine:d-alanine ligase is more strongly inhibited than alanine racemase at equivalent DCS concentrations. We also shed light on mechanisms surrounding d-Ala-mediated antagonism of DCS growth inhibition and provide evidence for a postantibiotic effect for this drug. Our results illustrate the potential of metabolomics in cellular drug-target engagement studies and consequently have broad implications in future drug development and target validation ventures.
DOI: 10.1021/bi400839f
发表时间: 2013-10-08
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Prosser, Gareth A.;de Carvalho, Luiz Pedro S.
通讯作者: de Carvalho, Luiz Pedro S.
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发表时间: 2013-02-01
期刊: FEBS JOURNAL
影响因子: 5.4
作者:
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期刊: BIOCHEMISTRY
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发表时间: 2010-09-01
影响因子: 56.3
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通讯作者: Migliori, Giovanni Battista