MetaCyc Pathway: superpathway of S-adenosyl-L-methionine biosynthesis in Pseudomonas stutzeri RCH2

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Reactions and Genes L-tyrosine (C)
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Aspartate kinase:
L-aspartate + ATP→L-aspartyl-4-phosphate + ADP (EC 2.7.2.4)
Psest_2988 -0.7
Psest_4094 -0.0
Aspartate-semialdehyde dehydrogenase (in reverse):
L-aspartyl-4-phosphate + NADPH + H+→L-aspartate 4-semialdehyde + NADP+ + phosphate (EC 1.2.1.11)
Psest_1328 N.D.
Psest_2587 -0.1
Psest_2588 N.D.
Homoserine dehydrogenase (in reverse):
L-aspartate 4-semialdehyde + NAD(P)H + H+→L-homoserine + NAD(P)+ (EC 1.1.1.3)
Psest_2136 +2.2
Psest_3126 N.D.
Homoserine O-succinyltransferase:
L-homoserine + succinyl-CoA→O-succinyl-L-homoserine + coenzyme A (EC 2.3.1.46)
No genes
Cystathionine gamma-synthase:
O-succinyl-L-homoserine + L-cysteine→L-cystathionine + H+ + succinate (EC 2.5.1.48)
Psest_2578 -4.4
Psest_3685 +0.1
Cysteine-S-conjugate beta-lyase:
L-cystathionine + H2O→L-homocysteine + ammonium + pyruvate (EC 4.4.1.13)
No genes
5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase:
L-homocysteine + 5-methyltetrahydropteroyl tri-L-glutamate→L-methionine + tetrahydropteroyl tri-L-glutamate (EC 2.1.1.14)
Psest_1452 -0.2
Methionine synthase:
L-homocysteine + a 5-methyltetrahydrofolate→L-methionine + a tetrahydrofolate (EC 2.1.1.13)
Psest_2102 +1.8
Methionine adenosyltransferase:
L-methionine + ATP + H2O→S-adenosyl-L-methionine + diphosphate + phosphate (EC 2.5.1.6)
Psest_0323 N.D.

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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