A continuous, fluorescent, high-throughput assay for human dimethylarginine dimethylaminohydrolase-1.
A continuous, fluorescent, high-throughput assay for human dimethylarginine dimethylaminohydrolase-1.
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DOI:
10.1177/1087057111417712
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发表时间:
2011-10
影响因子:
--
通讯作者:
Fast W
中科院分区:
文献类型:
--
作者:
Linsky T;Fast W
Inhibitors of human dimethylarginine dimethylaminohydrolase-1 (DDAH-1) are of therapeutic interest for controlling pathological nitric oxide production. Only a limited number of biologically useful inhibitors have been identified, so structurally diverse lead compounds are desired. In contrast with previous assays that do not possesses adequate sensitivity for optimal screening, herein is reported a high-throughput assay that uses an alternative thiol-releasing substrate, S-methyl-L-thiocitrulline, and a thiol-reactive fluorophore, 7-diethylamino-3-(4′-maleimidylphenyl)-4-methylcoumarin, to enable continuous detection of product formation by DDAH-1. The assay is applied to query two commercial libraries totaling 4,446 compounds and two representative hits are described, including a known DDAH-1 inhibitor. This is the most sensitive DDAH-1 assay reported to date, and enables screening of compound libraries using [S] =KM conditions, while displaying Z′ factors from 0.6 – 0.8. Therefore, this strategy now makes possible high-throughput screening for human DDAH-1 inhibitors in pursuit of molecular probes and drugs to control excessive nitric oxide production.
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