has participant has primary input hydron L-threonine residue ATP(4-) ADP(3-) O-phosphonato-L-threonine(2-) residue calcium/calmodulin-dependent protein kinase activity myosin heavy chain kinase activity RHEA:11424 GO:0016905 calmodulin-dependent myosin heavy chain kinase activity myosin heavy chain kinase A activity ATP:myosin heavy-chain O-phosphotransferase activity Catalysis of the reaction: ATP + myosin-heavy-chain = ADP + myosin-heavy-chain phosphate. myosin I heavy-chain kinase activity myosin I heavy chain kinase activity molecular_function myosin heavy-chain kinase activity EC:2.7.11.7 MHCK myosin-heavy-chain kinase activity STK6 myosin II heavy chain kinase activity MIHC kinase activity myosin II heavy-chain kinase activity ATP:myosin-heavy-chain O-phosphotransferase activity myosin-Ia