BAIAP2 is a ubiquitous regulator of the actin cytoskeleton. Controled by the Rho-family GTPases BAIAP2 facilitates filopodia development. BAIAP2 is expressed in the cytoplasm and binds small membrane-bound G-proteins to cytoplasmic effector proteins and operates as an insulin receptor tyrosine kinase substrate. BAIAP2 proposes a part for insulin in the central nervous system and was identified as interacting with the dentatorubral-pallidoluysian atrophy gene， which is related to an autosomal dominant neurodegenerative disease.
