A continuous fluorescence displacement assay for BioA: an enzyme involved in biotin biosynthesis.
A continuous fluorescence displacement assay for BioA: an enzyme involved in biotin biosynthesis.
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DOI:
10.1016/j.ab.2011.05.003
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发表时间:
2011-09-01
影响因子:
2.9
通讯作者:
Aldrich CC
中科院分区:
文献类型:
--
作者:
Wilson DJ;Shi C;Duckworth BP;Muretta JM;Manjunatha U;Sham YY;Thomas DD;Aldrich CC
Cofactor biosynthetic pathways represent a rich source of potential antibiotic targets. The second step in biotin biosynthesis is performed by BioA, a pyridoxal 5′-phosphate (PLP) dependent enzyme. This enzyme has been confirmed as a candidate target in Mycobacterium tuberculosis; however, the current bioassay used to measure BioA activity is cumbersome and low-throughput. Here we describe the design, development and optimization of a continuous coupled fluorescence displacement assay to measure BioA activity. In this coupled assay, BioD converts the product of the BioA–catalyzed reaction into dethiobiotin, which is subsequently detected by displacement of a fluorescently labeled dethiobiotin probe from streptavidin. The assay was further adapted to a high-throughput screening format and validated against the LOPAC library.
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