FK506 binding protein 7 is a protein that in humans is encoded by the FKBP7 gene. The gene is also known as FKBP23 and PPIase. FKBP7 belongs to the FKBP-type peptidyl-prolyl cis/trans isomerase (PPIase) family. Members of this family exhibit PPIase activity and function as molecular chaperones. The orthologous protein in mouse is located in the endoplasmic reticulum and binds calcium.