Involved in AFD-neuron mediated thermotaxis. Regulates behavior to environmental temperature. Thought to have a role in olfactory adaptation by affecting diacylglycerol levels. a 1,2-diacyl-sn-glycerol + ATP = a 1,2-diacyl-sn-glycero-3-phosphate + ADP + H(+) Monomer. Slow to adapt to new temperature levels. Dgk-3 and dgk-1 double mutant shows defects in olfactory adaptation. Belongs to the eukaryotic diacylglycerol kinase family.