May be involved in oogenesis. Interacts with MAPRE1 and APC. Expressed in liver, heart, kidney, ovary and testis, at 16 dpc, P6 and P16. The DAD domain regulates activation via by an autoinhibitory interaction with the GBD/FH3 domain. This autoinhibition is released upon competitive binding of an activated GTPase. The release of DAD allows the FH2 domain to then nucleate and elongate nonbranched actin filaments (By similarity). Belongs to the formin homology family. Diaphanous subfamily. Probable cloning artifact.