Serine/threonine-protein kinase PAK 6 (PAK6) belongs to the Group II PAK family members. Following the general structural organization of the group II PAKs, PAK6 also contains a kinase, and a GTPase interacting domain. The proteins of PAK family are Rac/Cdc42-associated Ste20-like Ser/Thr protein kinases, characterized by a highly conserved amino-terminal Cdc42/Rac interactive binding (CRIB) domain and a carboxyl-terminal kinase domain. PAK6 kinase activity is positively regulated by androgen receptor, p38MAPK, 5-fluorouracil and atypical Rho family GTPase Chp/RhoV. PAK6 expression is negatively regulated by miR-328, miR-429 and miR-23a.