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Table 3 Candidate reactions whose disruption increases the lactate or succinate production flux predicted by FBA simulations.

From: Development and experimental verification of a genome-scale metabolic model for Corynebacterium glutamicum

Reaction disabled by gene deletion

Lactate production flux (mmol/gDW/h)

Growth rate (1/h)

(Wild type)

3.33 (1.00)

9.54 × 10-2 (1.00)

ADP + Pi + 4H [e] → ATP + H2O + H

5.13 (1.54)

8.50 × 10-2 (0.89)

R5P + Xu5P ↔ S7P + GAP

5.02 (1.51)

9.06 × 10-2 (0.95)

MAL ↔ FUM + H2O

4.99 (1.50)

8.97 × 10-2 (0.94)

G6P + NADP → 6PGL + NADPH + H

4.99 (1.50)

9.06 × 10-2 (0.95)

Reaction disabled by gene deletion

Succinate production flux (mmol/gDW/h)

Growth rate (1/h)

(Wild type)

1.05 (1.00)

9.54 × 10-2 (1.00)

NADH + PYR + H ↔ LAC + NAD

2.24 (2.13)

8.11 × 10-2 (0.85)

  1. Lactate and succinate production fluxes and growth rate of strains in which a reaction is disabled by gene deletion are presented. The production fluxes and growth rate were calculated with the parameters GUR = 0.3 mmol/gDW/h and OUR = 0.03 mmol/gDW/h. Values in parenthesis represent fold change compared with those of wild type. Abbreviations are as follows: H [e], extracellular proton; MAL, malate; FUM, fumarate; G6P, glucose-6-phosphate; 6-PGL, 6-phospho-D-glucono-1,5-lactone; R5P, ribose-5-phosphate; Xu5P, xylulose-5-phosphate; S7P, sedoheptulose-7-phosphate; GAP, glyceraldehyde-3-phosphate; PYR, pyruvate; LAC, l-lactate.