Diacylglycerol kinase that converts diacylglycerol/DAG into phosphatidic acid/phosphatidate/PA and regulates the respective levels of these two bioactive lipids (PubMed:8702685). Thereby, acts as a central switch between the signaling pathways activated by these second messengers with different cellular targets and opposite effects in numerous biological processes (Probable). Plays a key role in promoting cell growth (By similarity). Activates the Ras/B-Raf/C-Raf/MEK/ERK signaling pathway induced by EGF. Regulates the recruitment of RAF1 and BRAF from cytoplasm to membranes and their heterodimerization (By similarity). a 1,2-diacyl-sn-glycerol + ATP = a 1,2-diacyl-sn-glycero-3-phosphate + ADP + H(+) 1,2-di-(9Z-octadecenoyl)-sn-glycerol + ATP = 1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phosphate + ADP + H(+) Lipid metabolism; glycerolipid metabolism. Interacts with RAF1 and BRAF. Translocated from the cytoplasm to endosomes in response to stress stimuli. Expressed in a wide variety of tissues (PubMed:8702685). Most abundant in the brain and testis; also found in lung, spleen, and prostate (at protein level) (PubMed:8702685). By glucocorticoids. Phosphorylated. Phosphorylation does not inhibit catalytic activity. Belongs to the eukaryotic diacylglycerol kinase family.