Enables several functions, including Rho GDP-dissociation inhibitor binding activity; nucleotide binding activity; and sulfonylurea receptor binding activity. Involved in several processes, including cardiac muscle cell apoptotic process; positive regulation of lamellipodium assembly; and positive regulation of protein import into nucleus. Located in several cellular components, including basolateral plasma membrane; brush border membrane; and sperm mitochondrial sheath. Part of protein-containing complex. Biomarker of portal hypertension. Orthologous to human HSP90AA1 (heat shock protein 90 alpha family class A member 1). [provided by Alliance of Genome Resources, Apr 2022]