Diacylglycerol kinase that converts diacylglycerol/DAG into phosphatidic acid/phosphatidate/PA and regulates the respective levels of these two bioactive lipids (PubMed:22627129). 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 (PubMed:22627129). Also plays an important role in the biosynthesis of complex lipids. Can also phosphorylate 1-alkyl-2-acylglycerol in vitro as efficiently as diacylglycerol provided it contains an arachidonoyl group (By similarity). Also involved in the production of alkyl-lysophosphatidic acid, another bioactive lipid, through the phosphorylation of 1-alkyl-2-acetyl glycerol (PubMed:22627129). a 1,2-diacyl-sn-glycerol + ATP = a 1,2-diacyl-sn-glycero-3-phosphate + ADP + H(+) 1,2-dihexadecanoyl-sn-glycerol + ATP = 1,2-dihexadecanoyl-sn-glycero-3-phosphate + ADP + H(+) 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + ATP = 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phosphate + ADP + H(+) 2-(9Z-octadecenoyl)-glycerol + ATP = 2-(9Z-octadecenoyl)-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(+) 1-octadecanoyl-2-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-sn-glycerol + ATP = 1-octadecanoyl-2-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-sn-glycero-3-phosphate + ADP + H(+) 1,2-didecanoyl-sn-glycerol + ATP = 1,2-didecanoyl-sn-glycero-3-phosphate + ADP + H(+) 1-O-alkyl-2-acyl-sn-glycerol + ATP = 1-O-alkyl-2-acyl-sn-glycero-3-phosphate + ADP + H(+) 1-O-hexadecyl-2-acetyl-sn-glycerol + ATP = 1-O-hexadecyl-2-acetyl-sn-glycero-3-phosphate + ADP + H(+) 1-O-hexadecyl-2-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-sn-glycerol + ATP = 1-O-hexadecyl-2-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-sn-glycero-3-phosphate + ADP + H(+) 1-O-hexadecyl-2-(9Z-octadecenoyl)-sn-glycerol + ATP = 1-O-hexadecyl-2-(9Z-octadecenoyl)-sn-glycero-3-phosphate + ADP + H(+) 1-O-hexadecyl-sn-glycerol + ATP = 1-O-hexadecyl-sn-glycero-3-phosphate + ADP + H(+) Stimulated by calcium and phosphatidylserine (By similarity). Activated by sphingosine (PubMed:22627129). Lipid metabolism; glycerolipid metabolism. Monomer. Lymphocytes and oligodendroglial cells. Belongs to the eukaryotic diacylglycerol kinase family.