Enables diacylglycerol kinase activity. Involved in modulation of chemical synaptic transmission and regulation of postsynapse organization. Acts upstream of or within response to bacterium. Located in Schaffer collateral - CA1 synapse; glutamatergic synapse; and plasma membrane. Is expressed in anterior abdominal wall musculature; nervous system; retina; and urinary system. Orthologous to human DGKB (diacylglycerol kinase beta). [provided by Alliance of Genome Resources, Apr 2022]