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  • BC-PEG-NH2

    Description

    BC-PEG-NH2 is an amine-terminated building block for the one-step synthesis of CLIP-tag substrates from NHS esters or other activated carboxylic esters on labels or surfaces. This building block allows you to make custom CLIP-tag substrates for labeling CLIP-tag fusion proteins for a wide range of applications. BC-PEG-NH2 is particularly useful for the synthesis of CLIP-tag substrates with affinity ligands or solid surfaces.

    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 link. Although CLIP-tag is based on the same protein as SNAP-tag®, 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: sub-cloning 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 fusion proteins with the CLIP-tag substrate is described in this document.
    S9222a
    Figure 1. Structure of BC-PEG-NH2 (MW 448.5 g/mol)

    Properties and Usage

    Storage Temperature

    -20°C

    Quality Control

    Quality Control Assays

    The following Quality Control Tests are performed on each new lot and meet the specifications designated for the product. Individual lot data can be found on the Product Summary Sheet/Datacard or Manual which can be found in the Supporting Documents section of this page.
    • Physical Purity (HPLC):
      The purity of the product is determined by HPLC analysis.

    Notes

    1. Dry BC-PEG-NH2 should be stored at -20°C.
    2. BC-PEG-NH2 is soluble in anhydrous N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Choose a solvent volume that will be compatible with the final use. Heating at 37°C, vortexing and/or sonication will aid dissolution.
    3. Unused BC-PEG-NHsubstrate dissolved in DMF or DMSO should be stored at -20°C.

    References

    1. Gautier, A. et al. (2008). Chemistry & Biology. 15, 128-136.

    Supporting Documents

    Material Safety Datasheets

    The following is a list of Material Safety Data Sheets (MSDS) that apply to this product to help you use it safely. The following file naming structure is used to name these document files: [Product Name] MSDS. For international versions please contact us at info@neb.com.

    Datacards

    The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The following file naming structure is used to name the majority of these document files: [Catalog Number]Datasheet-Lot[Lot Number]. For those product lots not listed below, please contact NEB at info@neb.com or fill out the Technical Support Form for appropriate document.
    1. Cellular Imaging and Analysis FAQs
    1. Labeling CLIP-tag Fusion Proteins with BC-substrates (S9222)
    2. Reaction Conditions for Chemical Coupling (S9222)

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