CDC37 is a cochaperone that functions as a critical regulator of protein kinase stability and activity. As a Hsp90-binding partner, CDC37 provides kinase-family recognition within the HSP90-CDC37 chaperone complex, facilitating interaction between Hsp90 and client kinases while stabilizing intrinsically unstable kinases 1. The complex supports approximately 60% of the human kinome and allows kinases to respond rapidly to cellular signals while protecting them from degradation 2. CDC37 inhibits HSP90 ATPase activity and works with Hsp90 to regulate protein folding, maturation, and signal transduction 3. Beyond canonical kinase chaperoning, CDC37 displays Hsp90-independent functions and interacts with non-kinase substrates 4, including roles in GSDMD-mediated IL-1β secretion during intestinal inflammation 5. In disease contexts, aberrant HSP90-CDC37 interactions destabilize oncogenic kinases in cancer pathways, including RAF in RAS/RAF/MEK signaling 6. Clinically, CDC37 serves as a prognostic biomarker in gastric carcinoma 7 and represents an attractive therapeutic target due to selective expression in certain cancers and its control of multiple growth-signaling pathways 8. Blocking HSP90-CDC37 protein-protein interactions offers higher selectivity with fewer toxic effects than direct Hsp90 inhibition.