May negatively regulate RAC1 signaling and RAC1-driven cytoskeletal remodeling (Probable). May regulate chemotaxis, cell migration and epithelial polarization by controlling the polarity, plasticity, duration and extent of protrusions (Probable). . This is the function of Ensembl gene identifier ENSG00000197872 (CYRIA, CYFIP related Rac1 interactor A).