Cdc37 is a molecular chaperone required for the activity of numerous eukaryotic protein kinases. This domains corresponds to the Hsp90 chaperone (Heat shocked protein 90) binding domain of Cdc37 [2]. It is found between the N terminal Cdc37 domain Pfam:PF03234, which is predominantly involved in kinase binding, and the C terminal domain of Cdc37 Pfam:PF08564 whose function is unclear.

1: Cdc37 is a molecular chaperone with specific functions in signal transduction. Kimura Y, Rutherford SL, Miyata Y, Yahara I, Freeman BC, Yue L, Morimoto RI, Lindquist S; Genes Dev 1997;11:1775-1785. PMID:9242486

2: Cdc37 maintains cellular viability in Schizosaccharomyces pombe independently of interactions with heat-shock protein 90. Turnbull EL, Martin IV, Fantes PA; FEBS J 2005;272:4129-4140. PMID:16098195