[3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] kinase activity
[3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] kinase activity
Catalysis of the reaction: ATP + L-seryl-[3-methyl-2-oxobutanoate dehydrogenase] = ADP + H+ + O-phospho-L-seryl-[3-methyl-2-oxobutanoate dehydrogenase].