CLIP-Surface™ 488 is a photostable green fluorescent substrate that can be used to label CLIP-tag™ fusion proteins on the surface of living cells or in vitro. This cell impermeable substrate (BC-488) is based on ATTO-TEC dye ATTO 488 and is suitable for standard fluorescein filter sets. It has an excitation maximum at 506 nm and emission maximum at 526 nm. This package includes 50 nmol of CLIP-Surface 488 substrate, sufficient to make 10 ml of a 5 µM CLIP-tag™ fusion protein labeling solution.
The CLIP-tag™ protein labeling system enables the specific, covalent attachment of virtually any molecule to a protein of interest. CLIP-tag is a protein tag based on human O6-alkylguanine-DNA-alkyltransferase (hAGT). CLIP-tag substrates are derivatives of benzylcytosine (BC). In the labeling reaction, the substituted benzyl group of the substrate is covalently attached to the reactive cysteine of CLIP-tag forming a stable thioether bond. Although CLIP-tag is based on the same protein as SNAP-tag, the benzylcytosine substrates form a separate class of substrates, different from the benzylcytosine substrates form a separate class of substrates, different from the benzylguanine substrates recognized by SNAP-tag. CLIP-tag and SNAP-tag® can be used for orthogonal and complementary labeling of two proteins simultaneously in the same cells.
There are two steps to using this system: subcloning and expression of the protein of interest as a CLIP-tag fusion, and labeling of the fusion with the CLIP-tag substrate of choice. Expression of CLIP-tag fusion proteins is described in the documentation supplied with CLIP-tag plasmids. The labeling of the fusion proteins on the cell surface with the CLIP-tag substrate is described in this document.
Materials Required but not Supplied
• Cells expressing CLIP-fusion proteins. The protein of interest can be expressed with the CLIP-tag as either an N- or a C-terminal fusion, but note that the tag needs to be exposed to the extracellular surface of the plasma membrane for labeling with CLIP-Surface 488.
• Tissue culture materials and media
• Transfection reagents
• Fluorescence microscope with suitable filter set
京公网安备11010802025653 版权所有：北京逸优科技有限公司
