A role for FKBP51 as a scaffold protein in AKT signaling was proposed in 2009 by Pei et al. when they identified the immunophilin as part of the protein complex AKT/PH domain leucine-rich repeat protein phosphatase (PHLPP), which enhanced the de-phosphorylation of AKT in a pancreatic cancer context [45]. The gene discussed is FKBP4; the disease is familial pancreatic carcinoma.