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EC 2.7.11.7 Details
EC number
2.7.11.7
Accepted name
myosin-heavy-chain kinase
Reaction
ATP + [myosin heavy-chain] = ADP + [myosin heavy-chain] phosphate
Other name(s)
ATP:myosin-heavy-chain O-phosphotransferase,
calmodulin-dependent myosin heavy chain kinase,
MHCK,
MIHC kinase,
myosin heavy chain kinase,
myosin I heavy-chain kinase,
myosin II heavy-chain kinase,
[myosin-heavy-chain] kinase,
myosin heavy chain kinase A,
STK6
Systematic name
ATP:[myosin heavy-chain] O-phosphotransferase
CAS registry number
64763-54-8
Comment
The enzyme from Dictyostelium sp. (slime moulds) brings about phosphorylation of the heavy chains of Dictyostelium myosin, inhibiting the actin-activated ATPase activity of the myosin. One threonine residue in each heavy chain acts as acceptor. While the enzyme from some species is activated by actin, in other cases Ca2+/calmodulin are required for activity.
History
created 1990 as EC 2.7.1.129, transferred 2005 to EC 2.7.11.7
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