Brazilian Journal of Chemical Engineering
On-line version ISSN 0104-6632
OLIVEIRA, B. H. et al. Production of native flagellin from Salmonella Typhimurium in a bioreactor and purification by tangential ultrafiltration. Braz. J. Chem. Eng. [online]. 2011, vol.28, n.4, pp. 575-584. ISSN 0104-6632. http://dx.doi.org/10.1590/S0104-66322011000400003.
Flagellin is the structural protein and most abundant component of bacterial flagella. The flagellum filament contains around 20,000 - 100,000 subunits of 50 kDa flagellin that can have diverse biotechnological applications such as vaccine adjuvant and cellular protector during chemo- and radiotherapy. The main aim of this work was to study a production process of purified native FliC flagellin of Salmonella Typhimurium. The culture conditions in shakers were established with medium devoid of animal-derived components. In bioreactors, culture conditions were established in order to obtain flagellin from the culture supernatant by tangential ultrafiltration (TUF). The concentrated 750 kDa cut-off TUF fraction had a purification factor of 1.5 and a recovery yield of 52.2% for flagellin. The volumetric production of flagellin using the described procedure achieved around 307 mg/L of culture, which represented a significant improvement over previously reported methods. These results permit the development of production and purification processes that can be easily scaled up.
Keywords : Flagellin; Purification; Tangential ultrafiltration; Salmonella Typhimurium.