Patent ID: 7763447

Claim:
A method for producing succinic acid by fermentation, comprising allowing a bacterium selected from coryneform bacterium, Bacillus bacterium, and Rhizobium bacterium or a cell preparation thereof to react with an organic raw material in a reaction solution containing a carbonate ion, a bicarbonate ion, or carbon dioxide gas under anaerobic conditions to generate succinic acid; and collecting the succinic acid, wherein said bacterium is modified by: having a succinate dehydrogenase gene from coryneform bacterium operably linked to a strong heterologous promoter, or increasing copy number of a succinate dehydrogenase gene from coryneform bacterium, wherein said succinate dehydrogenase gene comprises a nucleotide sequence having not less than 99% sequence identity to nucleotides 1153-3171 of SEQ ID NO: 28, a nucleotide sequence having not less than 99% sequence identity to nucleotides 3174-3920 of SEQ ID NO: 28, and a nucleotide sequence having not less than 99% sequence identity to nucleotides 363-1133 of SEQ ID NO: 28.