LanthaScreen™ Kinase Activity Assays
Invitrogen's LanthaScreen™ kinase activity assay toolbox has been designed with four key goals in mind:
Our LanthaScreen™ kinase activity assay toolbox of 'mix and match' assay reagents is designed to enable rapid assay configuration. Our portfolio of phospho-specific antibodies, matched fluorescent peptide substrates and in-house produced kinases have been tested in >200 different kinase assays to date. |
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View kinases with assay conditions developed using LanthaScreen™ activity assays
Whether you are routinely running kinases assays in-house to support discovery programs or need generic reagents to quickly build new TR-FRET assays, our portfolio of LanthaScreen™ reagents can enable your assay development program.
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LanthaScreen™ Activity Assay Mechanism
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Schematic Illustration of a LanthaScreen™ Kinase Activity Assay
In a LanthaScreen™ kinase activity assay, kinase, fluorescein-labeled substrate, and ATP are allowed to react. Then EDTA (to stop the reaction) and terbium-labeled antibody (to detect phosphorylated product) are added. In a LanthaScreen™ kinase reaction, the antibody associates with the phosphorylated fluorescein labelled substrate resulting in an increased TR-FRET value. The TR-FRET value is a dimensionless number that is calculated as the ratio of the acceptor (fluorescein) signal to the donor (terbium) signal. The amount of antibody that is bound to the tracer is directly proportional to the amount of phosphorylated substrate present, and in this manner, kinase activity can be detected and measured by an increase in the TR-FRET value.
Schematic of a LanthaScreen™ activity assay using secondary antibodies
In a kinase assay utilizing the terbium labeled anti-Mouse antibody generic reagent, the assay is very similar to the direct format with the exception that the phospho-specific antibody is not labeled and the detection step is performed by the addition of the terbium labeled anti-Mouse antibody. This approach can be applied to target classes beyond kinases.
In a LanthaScreen™ kinase activity assay, kinase, fluorescein-labeled substrate, and ATP are allowed to react. Then EDTA (to stop the reaction) and terbium-labeled antibody (to detect phosphorylated product) are added. In a LanthaScreen™ kinase reaction, the antibody associates with the phosphorylated fluorescein labelled substrate resulting in an increased TR-FRET value. The TR-FRET value is a dimensionless number that is calculated as the ratio of the acceptor (fluorescein) signal to the donor (terbium) signal. The amount of antibody that is bound to the tracer is directly proportional to the amount of phosphorylated substrate present, and in this manner, kinase activity can be detected and measured by an increase in the TR-FRET value.
Schematic of a LanthaScreen™ activity assay using secondary antibodies
In a kinase assay utilizing the terbium labeled anti-Mouse antibody generic reagent, the assay is very similar to the direct format with the exception that the phospho-specific antibody is not labeled and the detection step is performed by the addition of the terbium labeled anti-Mouse antibody. This approach can be applied to target classes beyond kinases.
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More Information
Generic LanthaScreen™ Reagents
Technical Resources