Part:BBa_K3117026:Design
scFv against GPA33 with SpyCatcher codon optimized for CHOs
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
Design Notes
By connecting the variable regions of the heavy and light chain of an anti-GPA33 antibody with a short, flexible GGGGS linker (BBa_K3117028), the scFv retains it's antigen-binding ability and is much smaller than a conventional antibody. The SpyCatcher attached to the scFv belongs to the SpyTag/SpyCatcher system, of which the sequence is derived of the FbaB protein in the bacteria Streptococcus pyogenes. Once it comes into contact with its corresponding other part, the SpyTag (BBa_K3117015), they bind covalently (Hatlem, Trunk, Linke, & Leo, 2019). This allows our part to be used in a modular manner in combination with other molecules carrying the SpyTag. The sequence contains a C-terminal His-Tag (BBa_K3117005) for easy purification and detection. Secretion of the protein is ensured by an Igk leader (BBa_K3117006), which directs the produced protein into the secretory pathway. When the protein passes the membrane, the leader segment is cleaved off.
Source
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References
1. Hatlem, D., Trunk, T., Linke, D., & Leo, J. C. (2019). Catching a SPY: Using the SpyCatcher-SpyTag and Related Systems for Labeling and Localizing Bacterial Proteins. International journal of molecular sciences, 20(9), 2129.
2. Rageul, J., Mottier, S., Jarry, A., Shah, Y., Théoleyre, S., Masson, D., . . . Denis, M. G. (2009). KLF4‐dependent, PPARγ‐induced expression of GPA33 in colon cancer cell lines. International journal of cancer, 125(12), 2802-2809.
3. Schoene, C., Fierer, J. O., Bennett, S. P., & Howarth, M. (2014). SpyTag/SpyCatcher cyclization confers resilience to boiling on a mesophilic enzyme. Angewandte Chemie International Edition, 53(24), 6101-6104.