Highly specific for ethanolamine phosphorylation. Does not have choline kinase activity (By similarity). ATP + ethanolamine = ADP + H(+) + phosphoethanolamine Phospholipid metabolism; phosphatidylethanolamine biosynthesis; phosphatidylethanolamine from ethanolamine: step 1/3. Expressed in kidney, liver, ovary, testis and prostate. Belongs to the choline/ethanolamine kinase family. Truncated N-terminus.