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Expression and purification of N-terminal fragment of filamentous hemagglutinin from Bordetella Pertussis in E. Coli
 Jurnečka, David ; Stiborová, Marie (advisor) ; Kavan, Daniel (referee)
: Whooping cough is highly contagious disease caused by gram-negative bacteria Bordetella pertussis. During infection the bacteria produces many types of toxins and adhesive molecules including a filamentous hemagglutinin(FHA). FHA is 220 kDa surface-exposed and secreted protein, which plays a key role in host-cell interactions. The project aims at construction of heterologous expression system for production of the N-terminal part of B. pertussis FHA (FHA1-862) in E. coli. The expression vector is composed of system of two independent T7/Lac promoters and enables secretion of FHA1-862 into the culture media. Downstream of the first promoter is fhaB gene encoding FHA1-862 and the letter is followed by fhaC gen encoding the FhaC transport protein, which allows translocation of FHA from periplasmic space to extracellular milieu. FHA1-862 was successfully secreted in E. coli strain BL21 carrying plasmid pMM100 (Laclq) at 30 řC and purified by affinity chromatography on Cellufine resin. These results indicate that FHA1-862 protein can be produced in E. coli, however, the system is inefficient and the yield of the protein is very low. (In Czech)
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