ID 4.1.1.72 DE branched-chain-2-oxoacid decarboxylase. AN (3S)-3-methyl-2-oxopentanoate carboxy-lyase. CA (S)-3-methyl-2-oxopentanoate + H(+) = 2-methylbutanal + CO2. CC -!- Acts on a number of 2-oxo acids, with a high affinity toward CC branched-chain substrates. CC -!- The aldehyde formed may be enzyme-bound, and may be an intermediate CC in the bacterial system for biosynthesis of branched-chain fatty CC acids. DR Q06408, ARO10_YEAST; P06169, PDC1_YEAST ; P16467, PDC5_YEAST ; DR P26263, PDC6_YEAST ; Q07471, THI3_YEAST ; //