MetaCyc Pathway: protocatechuate degradation I (meta-cleavage pathway) in Hydrogenophaga sp. GW460-11-11-14-LB1

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Reactions and Genes Ying_all64 rep C; time point 3
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Protocatechuate 4,5-dioxygenase:
protocatechuate + dioxygen→4-carboxy-2-hydroxymuconate-6-semialdehyde + H+
(EC 1.13.11.8)
GFF1652 -0.1
GFF1653 -0.0
GFF3312 +0.5
GFF3801 -1.7
GFF3802 -0.8
4-carboxy-2-hydroxymuconate-6-semialdehyde→2-hydroxy-4-carboxymuconate semialdehyde hemiacetal (spontaneous)
No genes
2-hydroxy-4-carboxymuconate semialdehyde hemiacetal + NADP+→2-pyrone-4,6-dicarboxylate + NADPH + H+ (EC 1.1.1.312)
GFF3803 -4.1
2-pyrone-4,6-dicarboxylate lactonase:
2-pyrone-4,6-dicarboxylate + H2O→(1E)-4-oxobut-1-ene-1,2,4-tricarboxylate + H+
(EC 3.1.1.57)
GFF3800 +0.4
(1E)-4-oxobut-1-ene-1,2,4-tricarboxylate→(1E,3E)-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylate (spontaneous) (EC 5.3.2.8)
No genes
4-oxalmesaconate hydratase (in reverse):
(1E,3E)-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylate + H2O→2-hydroxy-4-oxobutane-1,2,4-tricarboxylate
(EC 4.2.1.83)
GFF3798 -0.9
4-hydroxy-4-methyl-2-oxoglutarate aldolase:
2-hydroxy-4-oxobutane-1,2,4-tricarboxylate→oxaloacetate + pyruvate
(EC 4.1.3.17)
GFF2963 +0.1
GFF3799 -0.9
GFF5061 N.D.
Malate dehydrogenase (oxaloacetate-decarboxylating):
oxaloacetate + H+→pyruvate + CO2
(EC 1.1.1.38; 1.1.1.40; 1.1.1.83; 4.1.1.112)
GFF2469 +1.7
GFF2675 -0.9
GFF3306 -0.3
GFF3799 -0.9
GFF3852 -0.8
GFF5061 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