Enhances the phosphorylation and activation of AKT1 and AKT2. Interacts with AKT1 and AKT2 (via PH domain). Does not interact with AKT3. Expressed in a variety of tissues including placenta and testis. Activated in chronic T-cell leukemias (T-CLL) carrying rearrangements of the 14q32.1 region. Belongs to the TCL1 family.