MetaCyc Pathway: superpathway of L-lysine, L-threonine and L-methionine biosynthesis I in Escherichia coli ECOR38

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Aspartate transaminase (in reverse):
oxaloacetate + L-glutamate→L-aspartate + 2-oxoglutarate
(EC 2.6.1.1)
HEPCGN_14250
HEPCGN_20050 (aRO8)
HEPCGN_23140 (aspC)
HEPCGN_26230 (ydcR)
Aspartate kinase:
L-aspartate + ATP→L-aspartyl-4-phosphate + ADP
(EC 2.7.2.4)
HEPCGN_09115 (thrA)
HEPCGN_11690 (lysC)
HEPCGN_12340 (metL)
Aspartate-semialdehyde dehydrogenase (in reverse):
L-aspartyl-4-phosphate + NADPH + H+→L-aspartate 4-semialdehyde + NADP+ + phosphate
(EC 1.2.1.11)
HEPCGN_15690 (asd)
HEPCGN_21870 (usg)
L-aspartate 4-semialdehyde + pyruvate→(2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H+ + H2O (EC 4.3.3.7)
HEPCGN_21085 (dapA)
Homoserine dehydrogenase (in reverse):
L-aspartate 4-semialdehyde + NAD(P)H + H+→L-homoserine + NAD(P)+
(EC 1.1.1.3)
HEPCGN_09115 (thrA)
HEPCGN_12340 (metL)
Homoserine kinase:
L-homoserine + ATP→O-phospho-L-homoserine + ADP + H+
(EC 2.7.1.39)
HEPCGN_09110 (thrB)
Homoserine O-succinyltransferase:
L-homoserine + succinyl-CoA→O-succinyl-L-homoserine + coenzyme A
(EC 2.3.1.46)
HEPCGN_11915 (metA)
(2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + NAD(P)H + H+→(S)-2,3,4,5-tetrahydrodipicolinate + NAD(P)+ + H2O (EC 1.17.1.8)
HEPCGN_08940 (dapB)
Cystathionine gamma-synthase:
O-succinyl-L-homoserine + L-cysteine→L-cystathionine + H+ + succinate
(EC 2.5.1.48)
HEPCGN_12345 (metB)
2,3,4,5-tetrahydropyridine-2,6-dicarboxylate N-succinyltransferase:
(S)-2,3,4,5-tetrahydrodipicolinate + succinyl-CoA + H2ON-succinyl-2-amino-6-ketopimelate + coenzyme A
(EC 2.3.1.117)
HEPCGN_08190 (dapD)
Threonine synthase:
O-phospho-L-homoserine + H2O→L-threonine + phosphate
(EC 4.2.3.1)
HEPCGN_09105 (thrC)
Cysteine-S-conjugate beta-lyase:
L-cystathionine + H2O→L-homocysteine + ammonium + pyruvate
(EC 4.4.1.13)
HEPCGN_05965 (malY)
HEPCGN_17825 (metC)
Succinyldiaminopimelate transaminase (in reverse):
N-succinyl-2-amino-6-ketopimelate + L-glutamateN-succinyl-L,L-2,6-diaminopimelate + 2-oxoglutarate
(EC 2.6.1.17)
HEPCGN_16055 (argD,dapC)
HEPCGN_23030 (serC)
5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase:
L-homocysteine + 5-methyltetrahydropteroyl tri-L-glutamate→L-methionine + tetrahydropteroyl tri-L-glutamate
(EC 2.1.1.14)
HEPCGN_13025 (metE)
Methionine synthase:
L-homocysteine + a 5-methyltetrahydrofolate→L-methionine + a tetrahydrofolate
(EC 2.1.1.13)
HEPCGN_11885 (metH)
Succinyl-diaminopimelate desuccinylase:
N-succinyl-L,L-2,6-diaminopimelate + H2O→L,L-diaminopimelate + succinate
(EC 3.5.1.18)
HEPCGN_21125 (dapE)
Diaminopimelate epimerase:
L,L-diaminopimelate→meso-diaminopimelate
(EC 5.1.1.7)
HEPCGN_04740 (zwf)
HEPCGN_13135 (dapF)
Diaminopimelate decarboxylase:
meso-diaminopimelate + H+→L-lysine + CO2
(EC 4.1.1.20)
HEPCGN_19565 (lysA)

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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