Forms a transiant heterodimeric complex with LMO1, that acts as a guanine nucleotide exchange factor exchange factor (GEF) for the small GTPase RHO5 (PubMed:25598154). DCK1, LMO1 and RHO5 relocate to mitochondria upon oxidative stress and trigger cell death (PubMed:25598154). The DCK1/LMO1/RHO5 signaling module mediates mitochondrial turnover under nitrogen starvation conditions via mitophagy (PubMed:25598154). The DCK1/LMO1/RHO5 signaling module plays also a function in cell wall integrity signaling (PubMed:25598154). Forms an active heterodimer with LMO1. Quickly relocates to mitochondria under oxidative stress. Leads to hyper-resistance to cell wall stress agents such as calcofluor white and Congo red. Present with 238 molecules/cell in log phase SD medium. Belongs to the DOCK family.