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Table 1 Kinetic parameters for glucose transporters and energetic costs for glucose internalization and phosphorylation*.

From: Improvement of Escherichia coli production strains by modification of the phosphoenolpyruvate:sugar phosphotransferase system

Transporter

K m

V max

Energetic costsa

IIGlc complex

3–10 μM

126 μmol min-1 g-1

1 PEP

IIMan complex

15 μM

72 μmol min-1 g-1

1 PEP

GalP

10.2 μM

15.6 μmol min-1 g-1

1 H+ + 1 ATP

MglABC

N.D

N.D.

2 ATP

Glf

4.1 mM

75 μmol min-1 g-1

1 ATP

  1. * N.D., not determined.
  2. a The energetic cost equivalent of 1 mol of PEP is 1 mol of ATP.
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Microbial Cell Factories

ISSN: 1475-2859

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