Alternative products: Additional isoforms seem to exist, Caution: Was originally (PubMed: 7864889) thought to be nuclear. function: Binds calmodulin in a calcium dependent manner. May function as scaffolding or signaling protein. similarity: Belongs to the WD repeat striatin family. similarity: Contains 6 WD repeats. subunit: Interacts with protein phosphatase 2A (PP2A) .