Cane molasses as a source of precursors in the bioproduction of tryptophan by Bacillus subtilis
| Autor: | marzieh dehghan shasaltaneh, Moosavi-Nejad, Z., Gharavi, S., Fooladi, J. |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
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| Zdroj: | Iranian Journal of Microbiology, Vol 5, Iss 3 (2013) Iranian Journal of Microbiology Scopus-Elsevier |
| ISSN: | 2008-4447 2008-3289 |
| Popis: | Background and Objectives: The essential amino acid L-tryptophan can be produced by a condensation reaction between indole and L-serine, catalyzed by B. subtilis with tryptophan synthase activity. Application of the tryptophan is widespread in the biotechnology domain and is sometimes added to feed products as a food fortifier. Materials and Methods: The optimum concentration of the Iranian cane molasses was determined by measuring the amount of biomass after growth in 1 to 30 g/mL of molasses. The maximum amount of biomass was obtained in 10 g/mL molasses. Chromatographic methods, TLC and HPLC, were used to assay the amount of tryptophan produced in the presence of precursors of tryptophan production (indole and serine) and/or molasses. Results: Our results indicate the importance of the Iranian cane molasses not only as carbon source, but also as a source of precursors for tryptophan production. Conclusion: This report evaluates the potential of cane molasses as an economical source for tryptophan production by B. subtilis, hence eliminating the requirement for additional serine and indole as precursors. |
| Databáze: | OpenAIRE |
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