Acts as an effector of RAC1 (PubMed:31871319). Associates with CCR4-NOT complex which is one of the major cellular mRNA deadenylases and is linked to various cellular processes including bulk mRNA degradation, miRNA-mediated repression, translational repression during translational initiation and general transcription regulation (PubMed:29395067). May also play a role in miRNA silencing machinery (PubMed:29395067). {ECO:0000269|PubMed:29395067, ECO:0000269|PubMed:31871319}. This is the function of GARRE1 (granule associated Rac and RHOG effector 1, Ensembl gene identifier ENSG00000166398).