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- Title
Diammonium phosphate stimulates transcription of L-lactate dehydrogenase leading to increased L-lactate production in the thermotolerant Bacillus coagulans strain.
- Authors
Sun, Lifan; Li, Yanfeng; Wang, Limin; Wang, Yanping; Yu, Bo
- Abstract
Exploration of cost-effective fermentation substrates for efficient lactate production is an important economic objective. Although some organic nitrogen sources are also cheaper, inorganic nitrogen salts for lactate fermentation have additional advantages in facilitating downstream procedures and significantly improving the commercial competitiveness of lactate production. In this study, we first established an application of diammonium phosphate to replace yeast extract with a reduced 90 % nitrogen cost for a thermotolerant Bacillus coagulans strain. In vivo enzymatic and transcriptional analyses demonstrated that diammonium phosphate stimulates the gene expression of L-lactate dehydrogenase, thus providing higher specific enzyme activity in vivo and increasing L-lactic acid production. This new information provides a foundation for establishing a cost-effective process for polymer-grade L-lactic acid production in an industrial setting.
- Subjects
DIAMMONIUM phosphate; LACTATE dehydrogenase; BACILLUS (Bacteria); BACILLUS circulans; LACTIC acid fermentation; ANIMAL behavior
- Publication
Applied Microbiology & Biotechnology, 2016, Vol 100, Issue 15, p6653
- ISSN
0175-7598
- Publication type
Article
- DOI
10.1007/s00253-016-7379-x