May be involved in the cytoskeletal organization of neuronal growth cones. Seems to be inactive as a PPIase (By similarity). Involved in the transport of early endosomes at the level of transition between microfilament-based and microtubule-based movement. Interacts with WIP and actin (PubMed:19121306). Interacts with TBC1D23 (PubMed:29084197). Present in axons and neuronal growth cones. The PPIase FKBP-type domain seems to be inactive both for FK506-binding and enzymatic activity. The central coiled-coil region is responsible for association with early endosomes. Belongs to the FKBP-type PPIase family.