ID 3.1.3.52 DE [3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring)]- DE phosphatase. AN branched-chain oxo-acid dehydrogenase phosphatase. CA H2O + O-phospho-L-seryl-[3-methyl-2-oxobutanoate dehydrogenase] = CA L-seryl-[3-methyl-2-oxobutanoate dehydrogenase] + phosphate. CC -!- A mitochondrial enzyme associated with the 3-methyl-2-oxobutanoate CC dehydrogenase complex. CC -!- Simultaneously dephosphorylates and activates EC 1.2.4.4, that has CC been inactivated by phosphorylation. DR Q2PC20, PPM1K_BOVIN; Q8N3J5, PPM1K_HUMAN; Q8BXN7, PPM1K_MOUSE; DR Q5R522, PPM1K_PONAB; A6K136, PPM1K_RAT ; //