SNAP-Cell® 360

  • Catalog # S9101 was discontinued on January 01, 2017
  • Product Information
    SNAP-Cell® 360 is a blue fluorescent substrate that can be used to label SNAP-tag® fusion proteins inside living cells, on cell surfaces, or in vitro. This cell-permeable substrate (CP-360) is based on aminomethylcoumarin and is suitable for DAPI filter sets or appropriate blue lasers. It has an excitation maximum at 357 nm and an emission maximum at 437 nm. This package contains 50 nmol of CP-360 substrate, sufficient to make 10 ml of a 5 µM SNAP-tag fusion protein labeling solution.

    The SNAP-tag protein labeling system enables the specific, covalent attachment of virtually any molecule to a protein of interest. The SNAP-tag is a small protein based on mammalian O6-alkylguanine-DNA alkyltransferase (AGT). SNAP-tag substrates are derivatives of benzylpurines and benzylchloropyrimidines. In the labeling reaction, the dye-substituted benzyl group of the substrate is covalently attached to the SNAP-tag.

    There are two steps to using this system: subcloning and expression of the protein of interest as a SNAP-tag fusion, and labeling of the fusion with the SNAP-tag substrate of choice. Expression of SNAP-tag fusion proteins is described in the documentation supplied with SNAP-tag plasmids. The labeling of the fusion proteins with the SNAP-tag substrate is described below.

    Figure 1: Live CHO-K1 cells transiently transfected with pSNAP-H2B

    Figure 1: Live CHO-K1 cells transiently transfected with pSNAP-H2B

    Cells were labeled with SNAP-Cell 360 (bright blue) for 30 minutes.
    Figure 2: Excitation (dotted line) and emission spectra of SNAP-Cell-360 coupled to SNAP-tag in buffer at pH 7.5
    Figure 2: Excitation (dotted line) and emission spectra of SNAP-Cell-360 coupled to SNAP-tag in buffer at pH 7.5

    Figure 3:  Structure of SNAP-Cell-360 (MW 479.9)
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