Co-chaperone that binds to numerous kinases and promotes their interaction with the Hsp90 complex, resulting in stabilization and promotion of their activity (By similarity). Inhibits daf-21/Hsp90 ATPase activity (PubMed:23569206). Forms a complex with daf-21/Hsp90 (PubMed:23569206). Interacts with a number of kinases (By similarity). Phosphorylated. Dephosphorylated by pph-5. Belongs to the CDC37 family.