May catalyze the ATP-dependent phosphorylation of lipids other than diacylglycerol (DAG). In fact, is not able to exhibit diacylglycerol kinase activity in vitro. Binds 1 Mg(2+) ion per subunit. This ion appears to have a structural role and is required for catalytic activity. Belongs to the diacylglycerol/lipid kinase family.