ID 2.7.9.4 DE alpha-glucan, water dikinase. AN alpha-glucan,water dikinase. AN starch-related R1 protein. CA [(1->4)-alpha-D-glucosyl](n) + n ATP + n H2O = [(1->4)-6-phospho-alpha-D- CA glucosyl](n) + n AMP + 2n H(+) + n phosphate. CC -!- ATP appears to be the only phosphate donor. CC -!- No activity could be detected using GTP, UTP, phosphoenolpyruvate or CC diphosphate. CC -!- The protein phosphorylates glucans exclusively at O-6 of glucosyl CC residues. CC -!- The protein phosphorylates itself with the beta-phosphate of ATP, CC which is then transferred to the glucan. DR Q9SAC6, GWD1_ARATH ; Q8LPT9, GWD1_CITRE ; Q9AWA5, GWD1_SOLTU ; DR Q9STV0, GWD2_ARATH ; //