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This study was executed to develop probiotics producing S-adenosyl-L-methionine (SAMe), a methyl group donor in the 5-methyltetrahydrofolate methylation reaction in animal cells. SAMe is an essential substance in the synthesis, activation, and metabolism of hormones, neurotransmitters, nucleic acids, phospholipids, and cell membranes of animals. SAMe is also known as a nutritional supplement for improving human brain function. In this study, SAMe-producing strains were identified in six kinds of Cheonggukjang, and strains with excellent SAMe production were identified, with one strain in the Enterococcus genus and six strains in the Bacillus genus. Strains with a large amount of SAMe production included lactic acid bacteria, such as Enterococcus faecium, Enterococcus durans, and Enterococcus sanguinicola, as well as various strains in the Bacillus genus. The SAMe-overproducing strains showed antibacterial activity against some harmful microbes, in addition to weak acid resistance and strong bile resistance, indicating characteristics of probiotics. Cheonggukjang-originated beneficial bacterial strains overproducing SAMe may be commercially useful for manufacturing SAMe-rich foods.

journal of medicinal food

Selection and Characterization of<i>Cheonggukjang</i>(Fast Fermented Soybean Paste)-Originated Bacterial Strains with a High Level of S-adenosyl-L-methionine Production and Probiotics Efficacy

Selection and Characterization ofCheonggukjang(Fast Fermented Soybean Paste)-Originated Bacterial Strains with a High Level of S-adenosyl-L-methionine Production and Probiotics Efficacy