NCIt definition : A family of structurally related proteins that play a role in cell signalling, protein
folding and cellular stress responses. The members of this family are approximately
90 kDa.;
NCIt note : The Heat Shock Protein 90 members HSP89-alpha and HSP89-beta are a class of cytoplasmic
molecular chaperone homodimers that act in the signal transduction mechanism of steroid
receptors and may have ATPase activity. CDC37 and HSP90 associate preferentially with
CDK4 not bound to type D cyclins. HSPA8, HSP90A, CXCR4, and GDF5 on monocytes form
an activation cluster after LPS ligation and are involved in LPS signal transduction.
(OMIM 140571, Swiss-Prot P07900, P08238);