Difference between revisions of "Part:BBa K875005:Experience"
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===<strong>Applications of BBa_K875005</strong>=== | ===<strong>Applications of BBa_K875005</strong>=== | ||
| − | + | The construct was tested in E.coli W3110 strain which was previously trasformed with p-REP 4 encoding for the Lac Repressor. The recombinant bacterial culture was induced at O.D.= 0.4 (2x108 bacterial cells/ml) with IPTG (1mM) at 37°C in shaker. 2ml of bacterial culture were centrifuged and the pellet was resuspended in 200μl of lysis buffer. The samples were then sonicated and boiled for 5 min. 10μl of lysates of induced, non-induced and non trasformed bacterial cultures were resolved on SDS-PAGE. The expression of fusion protein LPP-OmpA-scFv 54.6-His was tested by Western blotting with anti-6HIS antibodies (Fig. 1). | |
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| − | + | [[Image:ompaSIP IMANEW.png|center|500px]] | |
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| − | + | FIG. 1. Expression of SIP 54.6 cloned in fusion with the LPP-OmpA leader sequence. Western blots of lysates of E.coli W3110 bacterial strain expressing the recombinant protein SIP 54.6 (60KDa), induced or non-induced with IPTG. The blot was reacted with the Affinity purified antibody goat anti-Human IgA(α). | |
| − | + | ||
| + | Western blot with anti-6HIS antibodies showed the band corresponding to SIP 54.6 at the expected position in the IPTG-induced sample. In the non-induced sample, a weaker signal is also detected suggesting that the promoter is leaky; aspecific signals are also visible. Some of them are due to partially degraded protein. | ||
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| + | Reference: | ||
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| + | 1. “Transport and anchoring of 8-lactamase to the external surface of Escherichia coli” J. A. Francisco, C. F. Earhart and G. Georgiou. Proc. Natl. Acad. Sci. USA Vol. 89, pp. 2713-2717, April 1992 Biochemistry. | ||
| + | 2. “Recombinant norovirus-specific scFv inhibit virus-like particle binding to cellular ligands” K. Ettayebi and M. E. Hardy. Published: 31 January 2008 in Virology Journal 2008, 5:21 | ||
===User Reviews=== | ===User Reviews=== | ||
Latest revision as of 22:42, 26 September 2012
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Applications of BBa_K875005
The construct was tested in E.coli W3110 strain which was previously trasformed with p-REP 4 encoding for the Lac Repressor. The recombinant bacterial culture was induced at O.D.= 0.4 (2x108 bacterial cells/ml) with IPTG (1mM) at 37°C in shaker. 2ml of bacterial culture were centrifuged and the pellet was resuspended in 200μl of lysis buffer. The samples were then sonicated and boiled for 5 min. 10μl of lysates of induced, non-induced and non trasformed bacterial cultures were resolved on SDS-PAGE. The expression of fusion protein LPP-OmpA-scFv 54.6-His was tested by Western blotting with anti-6HIS antibodies (Fig. 1).
FIG. 1. Expression of SIP 54.6 cloned in fusion with the LPP-OmpA leader sequence. Western blots of lysates of E.coli W3110 bacterial strain expressing the recombinant protein SIP 54.6 (60KDa), induced or non-induced with IPTG. The blot was reacted with the Affinity purified antibody goat anti-Human IgA(α).
Western blot with anti-6HIS antibodies showed the band corresponding to SIP 54.6 at the expected position in the IPTG-induced sample. In the non-induced sample, a weaker signal is also detected suggesting that the promoter is leaky; aspecific signals are also visible. Some of them are due to partially degraded protein.
Reference:
1. “Transport and anchoring of 8-lactamase to the external surface of Escherichia coli” J. A. Francisco, C. F. Earhart and G. Georgiou. Proc. Natl. Acad. Sci. USA Vol. 89, pp. 2713-2717, April 1992 Biochemistry. 2. “Recombinant norovirus-specific scFv inhibit virus-like particle binding to cellular ligands” K. Ettayebi and M. E. Hardy. Published: 31 January 2008 in Virology Journal 2008, 5:21
User Reviews
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