MetaCyc Pathway: L-isoleucine biosynthesis I (from threonine) in Escherichia coli ECOR27

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Reactions and Genes Sodium-DL-Lactate
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Threonine ammonia-lyase:
L-threonine→(Z)-2-aminobutenoate + H2O (EC 4.3.1.19)
NOLOHH_06770 (ilvA) -3.5
NOLOHH_10180 (tdcB) -0.2
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)
NOLOHH_06770 (ilvA) -3.5
NOLOHH_10180 (tdcB) -0.2
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)
NOLOHH_04135 (ridA) -0.2
NOLOHH_06770 (ilvA) -3.5
NOLOHH_10180 (tdcB) -0.2
NOLOHH_10200 (tdcF) -0.0
Acetolactate synthase:
2-oxobutanoate + H+ + pyruvate→(S)-2-aceto-2-hydroxybutanoate + CO2 (EC 2.2.1.6)
NOLOHH_03040 (ilvN) +0.2
NOLOHH_03045 (ilvI) +0.0
NOLOHH_06785 -2.0
NOLOHH_06790 (ilvG) -2.4
NOLOHH_07325 -0.1
NOLOHH_07330 (ilvN) -0.4
Ketol-acid reductoisomerase (in reverse):
(S)-2-aceto-2-hydroxybutanoate + NADPH + H+→(R)-2,3-dihydroxy-3-methylpentanoate + NADP+ (EC 1.1.1.86)
NOLOHH_06760 (ilvC) -4.6
Dihydroxy-acid dehydratase:
(R)-2,3-dihydroxy-3-methylpentanoate→(3S)-3-methyl-2-oxopentanoate + H2O (EC 4.2.1.9)
NOLOHH_06775 (ilvD) -3.9
Branched-chain-amino-acid transaminase (in reverse):
(3S)-3-methyl-2-oxopentanoate + L-glutamate→L-isoleucine + 2-oxoglutarate (EC 2.6.1.42)
NOLOHH_06780 (ilvE) -4.0

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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