Assay Method Information

Assay Name:  Cbl-b and C-Cbl LCK Ub TR-FRET Assay
Description:  Compounds are 3-told serially diluted in DMSO in a 384-well polypropylene plate (e.g., #P-05525-BC; Labcyte) to generate a source plate with 10 concentrations of each compound, top concentration=2 mM. 80 nL of DMSO or compounds are transferred to each well of a black 384-well ProxiPlate (e.g., #6008260; PerkinElmer) using a Labcyte Echo. 1× assay buffer (50 mM HEPES pH7.0, 100 mM NaCl, 0.01% BSA, 0.01% Triton-X100, 1 mM DTT), 2× enzyme solution (16 nM Biotin-Cbl-b or 12 nM Biotin-c-Cbl in 1× assay buffer), 2× kinase mixture (120 nM His-LCK, 1 mM ATP, 10 mM MgCl2 in assay buffer) and 2.33× detection mixture (4.66× solution 1:163 nM Anti-HA-D2 antibody (e.g., #610HADAB; PerkinElmer), 27.96 nM Streptavidin-EU (e.g., #AD0062; PerkinElmer), 1.398 mM EDTA in 1× assay buffer+4.66× solution 2: 2.7% pM UBE2D2/Methylated-HA-Ubiquitin thioester adduct (e.g., BostonBiochem) in 1× assay buffer) are prepared. 4 pL of 2× enzyme solution are added to each well containing compound, briefly centrifuged to mix, and incubated for 60 min at room temperature. 4 pL of 2× kinase mixture is added, briefly centrifuged to mix, and incubated for 90 min. at room temperature. 6 pL of detection mixture is added to all wells and briefly centrifuged before incubating for 20 min at room temperature.
Affinity data for this assay
 

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