In enzymology, a hypotaurocyamine kinase (EC 2.7.3.6) is an enzyme that catalyzes the chemical reaction In enzymology, a hypotaurocyamine kinase (EC 2.7.3.6) is an enzyme that catalyzes the chemical reaction Thus, the two substrates of this enzyme are ATP and hypotaurocyamine, whereas its two products are ADP and Nomega-phosphohypotaurocyamine. This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups (phosphotransferases) with a nitrogenous group as acceptor. The systematic name of this enzyme class is ATP:hypotaurocyamine N-phosphotransferase.