MetaCyc Pathway: L-isoleucine biosynthesis I (from threonine) in Sphingomonas koreensis DSMZ 15582

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Reactions and Genes D-Cellobiose (C); no added vitamins
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Threonine ammonia-lyase:
L-threonine→(Z)-2-aminobutenoate + H2O (EC 4.3.1.19)
Ga0059261_3694 -4.6
Ga0059261_3754 N.D.
1-aminocyclopropane-1-carboxylate deaminase:
(Z)-2-aminobutenoate→2-iminobutanoate (spontaneous) (EC 3.5.99.7; 4.3.1.19; 4.4.1.1; 4.4.1.11; 4.4.1.2)
Ga0059261_1458 +1.6
Ga0059261_3694 -4.6
Ga0059261_3754 N.D.
2-iminobutanoate + H2O→2-oxobutanoate + ammonium (spontaneous) (EC 3.5.99.10; 3.5.99.7; 4.3.1.19; 4.4.1.1; 4.4.1.11; 4.4.1.2)
Ga0059261_1458 +1.6
Ga0059261_3694 -4.6
Ga0059261_3754 N.D.
Acetolactate synthase:
2-oxobutanoate + H+ + pyruvate→(S)-2-aceto-2-hydroxybutanoate + CO2 (EC 2.2.1.6)
Ga0059261_0067 -4.4
Ga0059261_0068 -4.1
Ga0059261_0285 +0.6
Ga0059261_0603 +0.2
Ga0059261_1674 -0.1
Ketol-acid reductoisomerase (in reverse):
(S)-2-aceto-2-hydroxybutanoate + NADPH + H+→(R)-2,3-dihydroxy-3-methylpentanoate + NADP+ (EC 1.1.1.86)
Ga0059261_0066 N.D.
Dihydroxy-acid dehydratase:
(R)-2,3-dihydroxy-3-methylpentanoate→(3S)-3-methyl-2-oxopentanoate + H2O (EC 4.2.1.9)
Ga0059261_2649 +0.1
Ga0059261_4216 -4.7
Branched-chain-amino-acid transaminase (in reverse):
(3S)-3-methyl-2-oxopentanoate + L-glutamate→L-isoleucine + 2-oxoglutarate (EC 2.6.1.42)
Ga0059261_3811 -4.2

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Candidate genes for each reaction are identified from best hits to MetaCyc; by matching EC numbers (which are assigned by TIGRFam, SEED, or best hits to KEGG); or by matching SEED roles to KEGG reactions to MetaCyc reactions. See the "Protein" tab of each gene for more information