CP-Map555

SNAP-tag is a self-labeling protein derived from human O6-alkylguanine-DNA-alkyltransferase. At 20 kDa, SNAP-tag is smaller than HaloTag (33 kDa), potentially reducing interference with the tagged protein’s function. SNAP-tag reacts with covalently with benzylguanine (BG)or chloropyrimidine (CP) derivatives, forming a stable thioether bonds that ensures durability for long-term experiments or harsh conditions. SNAP-tag can be used alongside other tags like CLIP-tag for multicolor labeling. Chloropyrimidine (CP) derivatives generally exhibit better cell permeability compared to their benzylguanine (BG) derivatives. CP-Map555 is a SNAP-tag substrate containg Map555 dye. It forms a covalent bond with the SNAP-tag protein, ensuring stable labeling for long-term tracking. MaP555 (558Ex/578Em) is a small-molecule fluorogenic probe with excellent cell permeability. It is converted from 6-carboxytetramethylrhodamine (6-TAMRA) and has similar spectroscopic properties of 6-TAMRA. MaP555 has an acyl sulfamide structure which favors the spirolactam form, thus has excellent cell permeability. When the probe binds to its cellular targets, MaP555 mainly exists in the fluorescent zwitterion form. The good spectroscopic properties, high cell permeability and outstanding fluorogenicity of MaP555 make it very useful for wash-free, multicolour, live-cell nanoscopy.

References

Wang, L., Tran, M., D’Este, E., Roberti, J., Koch, B., Xue, L., & Johnsson, K. (2020). A general strategy to develop cell permeable and fluorogenic probes for multicolour nanoscopy. Nature Chemistry, 12(2), 165–172. https://doi.org/10.1038/s41557-019-0371-1

Documents 

Datasheet          MSDS

Citations

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