Part:BBa_K1638010

T25 domain of cyaA from Bordetella pertussis with GFP reporter

T25 domain of the catalytic active domain of CyaA from Bordetella pertussis linked together with green fluorescent protein (GFP) through a flexible 10 aa linker. This part allows detection of expression of the gene encoding the T25-GFP fusion protein. Additionally, the presence of green fluorescence will verify correct folding of the protein fused to the T25-domain through the flexible aa linker. Correct folding of our T18-domain is obviously improtant for the bacterial two-hybrid system to work.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal BamHI site found at 843
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Illegal BsaI.rc site found at 1516
  

Characterization

GFP was fused to the two components of the two-hybrid system, T18 and T25. This allows us to detect expression of these two components that are both under control of a lac promoter. Additionally, the presence of green fluorescence will verify that proteins can be fused to T18 and T25, and still fold into the correct structure.
The two constructs pSB1C3-T18-gfp and pSB1C3-T25-gfp were transformed into the competent E. coli K12-strain TOP10. The following fluorescence microscopy images confirm the presence of green fluorescence, which means that both T18 and T25 are expressed under the lac promoter, and that proteins fused to these two constructs will fold into the correct structure.

Fluorescence microscopy images: (A) pSB1C3-T25-GFP, (B) pSB1C3-T18-GFP and (C) pSB1C3-T18 transformed into TOP10 (E. coli K12-strain). Both (A) and (B) show as expected green fluorescence, while (C) does not. In preparation for imaging, the cells were washed two times with PBS.