| Assay Method Information | |
| | Fluorescence Polarization Assay |
| Description: | In order to identify compounds that disrupt the interaction between PIP3 and PH domains, a high-throughput fluorescence polarization (FP)-binding assay was developed using recombinant 1-123 amino acid N-terminal fragment of human Akt1 (also referred to herein simply as Akt), encompassing the PH domain (PH123 protein), and fluorescent NBD-labeled PIP3 molecule. The amino acid sequence of human Akt1 is publicly available as, for example, GenBank Accession No. NP001014432.1 (SEQ ID NO:1), and the corresponding DNA sequence is publicly available as, for example, GenBank Accession No. NM001014432. Briefly, 5 μM recombinant GST fusion proteins containing 1-123 a.a. N-terminal fragment of human Akt1 (PH 123) or 100 nM 441-551 a.a. region of human PDK1 were incubated with 15 nM TMR-labeled PIP3, PIP2, or PIP5 in buffer containing 50 mM Tris-HCl (pH 7.5), 150 mM NaCl, and 5 mM b-ME for 15 min at room temperature in the dark. |
| Affinity data for this assay | |
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