A bacteriophage-based platform for rapid trace detection of proteases.

A bacteriophage-based platform for rapid trace detection of proteases.
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DOI:
10.1021/ja104572f
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发表时间:
2010-09-29
影响因子:
15
通讯作者:
Dickerson, Tobin J.
Dickerson, Tobin J.
中科院分区:
化学1区
文献类型:
--
作者:
Capek, Petr;Kirkconnell, Killeen S.;Dickerson, Tobin J.

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Sensitive, inexpensive and rapid protease activity assays are of great merit for clinical diagnostics. Detection of protease-based toxins produced by Clostridium botulinum and Bacillus anthracis represents a particularly challenging task as exceptional sensitivity is a prerequisite due to the extreme potency of the toxins. Here, we present an inexpensive and sensitive assay platform for activity-based protease quantification utilizing filamentous bacteriophage as an exponentially amplifiable reporter and its application to detection of these bacterial toxins. The assay is based on specific cleavage of bacteriophage from a solid support and its subsequent quantification by means of infectivity or quantitative PCR. Detection of botulinum neurotoxin (BoNT) serotypes A and B and anthrax lethal factor in the pM range was demonstrated with a limit of detection of BoNT/A under optimized conditions of 2 pM.
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