Enables diacylglycerol kinase activity. Involved in diacylglycerol metabolic process; lipid phosphorylation; and regulation of signal transduction. Predicted to be located in clathrin-coated pit; cytoplasmic vesicle; and cytosol. Is expressed in several structures, including brain; immune system; musculature; reproductive system; and stomach. Used to study Lennox-Gastaut syndrome. Orthologous to human DGKD (diacylglycerol kinase delta). [provided by Alliance of Genome Resources, Apr 2022]