A homogeneous and nonisotopic assay for phosphatidylinositol 4-kinases.

A homogeneous and nonisotopic assay for phosphatidylinositol 4-kinases.
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DOI:
10.1016/j.ab.2011.05.046
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发表时间:
2011-10-01
影响因子:
2.9
通讯作者:
Balla T
Balla T
中科院分区:
生物学4区
文献类型:
--
作者:
Tai AW;Bojjireddy N;Balla T

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Phosphatidylinositol 4-kinases (PI 4-kinases) catalyze the conversion of phosphatidylinositol to phosphatidylinositol 4-phosphate (PtdIns4P). The four known mammalian PI 4-kinases, PI4KA, PI4KB, PI4K2A, and PI4K2B have roles in intracellular lipid and protein trafficking. PI4KA and PI4KB also assist the replication of several positive-sense RNA viruses. The identification of selective inhibitors of these kinases would be facilitated by assays suitable for high-throughput screening. We describe a homogenous and nonisotopic assay for PI 4-kinase activity based on the bioluminescent detection of the ADP produced by kinase reactions. We have evaluated this assay with known nonselective inhibitors of PI 4-kinases and show that it performs similarly to radiometric assay formats previously described in the literature. In addition, this assay generates Z-factor values of > 0.7 for PI4KA in 384-well format, demonstrating its suitability for high-throughput screening applications.
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