Method for construction of bacterial strains with increased succinic acid production
First Claim
1. A method for changing fermentative bacteria to succinic acid producing bacteria comprising:
- a) selecting a bacterial strain having a phosphotransferase system; and
b) altering the phosphotransferase system so as to allow the bacterial strain to simultaneously metabolize different sugars, wherein the alteration of said phosphotransferase system involves homologous recombination of a defective ptsG gene from strain LA-12G.
3 Assignments
0 Petitions
Accused Products
Abstract
A fermentation process for producing succinic acid is provided comprising selecting a bacterial strain that does not produce succinic acid in high yield, disrupting the normal regulation of sugar metabolism of said bacterial strain, and combining the mutant bacterial strain and selected sugar in anaerobic conditions to facilitate production of succinic acid. Also provided is a method for changing low yield succinic acid producing bacteria to high yield succinic acid producing bacteria comprising selecting a bacterial strain having a phosphotransferase system and altering the phosphotransferase system so as to allow the bacterial strain to simultaneously metabolize different sugars.
123 Citations
9 Claims
-
1. A method for changing fermentative bacteria to succinic acid producing bacteria comprising:
-
a) selecting a bacterial strain having a phosphotransferase system; and b) altering the phosphotransferase system so as to allow the bacterial strain to simultaneously metabolize different sugars, wherein the alteration of said phosphotransferase system involves homologous recombination of a defective ptsG gene from strain LA-12G. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for increasing succinic acid production in a bacterium, comprising:
-
a) selecting a bacteria having a phosphotransferase system containing a ptsG gene; b) creating a mutation in the ptsG gene which allows the bacteria to metabolize sugars other than glucose in the presence of glucose; and c) selecting those bacteria with increased succinic acid production. - View Dependent Claims (7, 8, 9)
-
Specification