May play a role in subcellular trafficking between the endoplasmic reticulum and Golgi apparatus through interactions with the Rho-type GTPases. Binding to the NS3 protein of dengue virus type 2 appears to subvert this activity into the alteration of the intracellular membrane structure associated with flaviviral replication. Homodimer. Binds to MLF1, recruiting a serine kinase which phosphorylates both itself and MLF1. Phosphorylated MLF1 binds to YWHAZ and is retained in the cytoplasm (By similarity). Colocalizes with activated RAC3 to endomembranes and at the cell periphery in lamellipodia. Ubiquitously expressed in all tissues examined with high levels in the testis. The protein kinase domain is predicted to be catalytically inactive. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. Author states that kinase activity observed in PubMed:11956649 may be due to sample contamination. This protein is predicted to be catalytically inactive.