MetaCyc Pathway: superpathway of L-isoleucine biosynthesis I in Escherichia coli BW25113

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Reactions and Genes D-Ribose (C)
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Aspartate transaminase (in reverse):
oxaloacetate + L-glutamate→L-aspartate + 2-oxoglutarate (EC 2.6.1.1)
b0928 (aspC) -1.7
b4340 (yjiR) +0.2
Aspartate kinase:
L-aspartate + ATP→L-aspartyl-4-phosphate + ADP (EC 2.7.2.4)
b0002 (thrA) -3.5
b3940 (metL) -0.0
b4024 (lysC) -1.0
Aspartate-semialdehyde dehydrogenase (in reverse):
L-aspartyl-4-phosphate + NADPH + H+→L-aspartate 4-semialdehyde + NADP+ + phosphate (EC 1.2.1.11)
b2319 (usg) -0.5
b3433 (asd) N.D.
Homoserine dehydrogenase (in reverse):
L-aspartate 4-semialdehyde + NAD(P)H + H+→L-homoserine + NAD(P)+ (EC 1.1.1.3)
b0002 (thrA) -3.5
b3940 (metL) -0.0
Homoserine kinase:
L-homoserine + ATP→O-phospho-L-homoserine + ADP + H+ (EC 2.7.1.39)
b0003 (thrB) -4.1
Threonine synthase:
O-phospho-L-homoserine + H2O→L-threonine + phosphate (EC 4.2.3.1)
b0004 (thrC) -3.8
Threonine ammonia-lyase:
L-threonine→(Z)-2-aminobutenoate + H2O (EC 4.3.1.19)
b3117 (tdcB) -0.2
b3772 (ilvA) -3.8
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)
b3117 (tdcB) -0.2
b3772 (ilvA) -3.8
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)
b3113 (yhaR) +0.0
b3117 (tdcB) -0.2
b3772 (ilvA) -3.8
b4243 (yjgF) +0.1
Acetolactate synthase:
2-oxobutanoate + H+ + pyruvate→(S)-2-aceto-2-hydroxybutanoate + CO2 (EC 2.2.1.6)
b0078 (ilvH) -1.3
b3670 (ilvN) -1.7
b3671 (ilvB) -3.5
b3769 (ilvM) +1.3
b0077 (ilvI) -1.2
Ketol-acid reductoisomerase (in reverse):
(S)-2-aceto-2-hydroxybutanoate + NADPH + H+→(R)-2,3-dihydroxy-3-methylpentanoate + NADP+ (EC 1.1.1.86)
b3774 (ilvC) -4.9
Dihydroxy-acid dehydratase:
(R)-2,3-dihydroxy-3-methylpentanoate→(3S)-3-methyl-2-oxopentanoate + H2O (EC 4.2.1.9)
b0269 (yagF) +0.1
b4297 (yjhG) +0.0
b3771 (ilvD) -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)
b3770 (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