| Primary Identifier | IPR027653 | Type | Family |
| Short Name | Formin_Diaph1 |
| description | Protein diaphanous homologue 1 (Dia1) belongs to the formin homology family, Diaphanous subfamily (also known as the Diaphanous-related formins, Drfs). In addition to the FH1 and FH2 domains, Drfs contain an N-terminal GTPase-binding domain (mDiaN) and a C-terminal Diaphanous-autoregulatory domain (DAD).Dia1 contains the N-terminal RhoA-binding domain (RBD) followed by a four armadillo-repeats containing Diaphanous inhibitory domain (DID) that binds the C-terminal Diaphanous autoregulatory domain (DAD) [, ]. Dia1 nucleates actin filaments and regulate actin polymerisation and depolymerisation. The activities of Dia1 is regulated by an autoinhibitory interaction between DAD domain and 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 []. Dia1 couples Rho and Src tyrosine kinase during signaling and the regulation of actin dynamics []. |
