BiSpyCatcher2
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- Product Type
- Recombinant Protein
- Specificity
- BiSpyCatcher2
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| BiSpyCatcher2 (H-BiSpyC2) is a 29 kDa homodimer of SpyCatcher2 (TZC001) bridged with a flexible linker. Each SpyCatcher2 subunit can form a stable covalent isopeptide bond with a second protein that includes a SpyTag. The reaction occurs spontaneously on mixing, is rapid, irreversible, high-yielding and shows good specificity. BiSpyCatcher2 contains a His6-tag at the N-terminus. To avoid deamidation of asparagine, a N105D mutation was introduced (Hentrich et al. 2020) for each of the two Catchers. The reaction is robust at pH 5 to 8, at temperatures from +4°C to +37°C, in various buffer conditions (Ca2+/Mg2+ not needed) and in the presence of detergents. The reaction also occurs inside cells (in vivo). Since the speed of the coupling reaction is concentration dependent, it is recommended to use BiSpyCatcher2 undiluted. All the different formats of BiSpyCatcher2 are compatible with Bio-Rad's recombinant HuCAL® antibodies with a SpyTag2 at the C-terminus of the heavy chain. Download BiSpyCatcher coupling protocol BiSpyCatcher2 (TZC002) is available in two modified versions, BiSpyCatcher2-CYS (TZC002CYS) and BiSpyCatcher-CYS3 (TZC002CYS3), which contain one or three cysteine residues, respectively, for site-specific conjugation by the user. BiSpyCatcher2-CYS can dimerize by formation of a disulfide bond via the free cysteines. Before conjugation to these cysteines, the BiSpyCatcher2-CYS must be reduced e.g., by addition of 5mM DTT and incubation for 1 hr at room temperature, followed by a fast DTT removal step, e.g., by size exclusion chromatography, as DTT can interfere with the conjugation chemistry. BiSpyCatcher2-CYS3 contains DTT to avoid oligomerization through disulfide bond formation. Immediately before conjugation, to avoid oxidation and disulfide bond formation, carry out a fast DTT removal step, e.g., by size exclusion chromatography. View all available Catchers |
- Target Species
- Protein/peptide tag
- Product Form
- BiSpyCatcher2 purified recombinant protein - liquid
- Preparation
- Recombinant protein expressed in E. coli and purified by affinity chromatography
- Buffer Solution
- Phosphate buffered saline
- Preservative Stabilisers
- 0.1% ProClin 950
- Purity
- ≥90% determined by SDS-PAGE under reducing conditions and visualized by coomassie blue staining
- Approx. Protein Concentrations
- 80 µM (2.3 mg/ml)
- Protein Molecular Weight
- Predicted 29018 Da
- Regulatory
- For research purposes only
- Guarantee
- 12 months from date of despatch
- Acknowledgements
- ProClin is a trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
This product and/or its use is covered by claims of U.S. patents, and/or pending U.S. and non-U.S. patent applications owned by or under license to Bio-Rad Laboratories, Inc. See bio-rad.com/en-us/trademarks for details.
Store at -20°C only.
Storage in frost-free freezers is not recommended.
This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the protein. Should this product contain a precipitate we recommend microcentrifugation before use.
Storage in frost-free freezers is not recommended.
This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the protein. Should this product contain a precipitate we recommend microcentrifugation before use.
This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
| Application Name | Verified | Min Dilution | Max Dilution |
|---|---|---|---|
| Immunoassay |  |
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
- Instructions For Use
- View BiSpyCatcher Coupling Protocol
| Description | Product Code | Applications | Pack Size | List Price | Your Price | Quantity | |
|---|---|---|---|---|---|---|---|
| SpyTag3 Peptide | BLP086 | IY | 1 mg |
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| Description | SpyTag3 Peptide | ||||||
| anti SpyCatcher | HCA379 | E F WB | 0.1 mg |
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| Description | anti SpyCatcher | ||||||
| BiSpyCatcher2-CYS | TZC002CYS | IY | 1 mg |
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| Description | BiSpyCatcher2-CYS | ||||||
| BiSpyCatcher2-CYS3 | TZC002CYS3 | IY | 1 mg |
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| Description | BiSpyCatcher2-CYS3 | ||||||
Antibody Characterization Reference
-
Hentrich, C. et al. (2021) Periplasmic expression of SpyTagged antibody fragments enables rapid modular antibody assembly.
Cell Chem Biol. 28 (6): 813-824.e6. Cell Chem Biol. 28 (6): 813-824.e6. -
Keeble, A.H. et al. (2017) Evolving Accelerated Amidation by SpyTag/SpyCatcher to Analyze Membrane Dynamics.
Angew Chem Int Ed Engl. 56 (52): 16521-16525. Angew Chem Int Ed Engl. 56 (52): 16521-16525. -
Zakeri, B. et al. (2012) Peptide tag forming a rapid covalent bond to a protein, through engineering a bacterial adhesin.
Proc Natl Acad Sci U S A. 109 (12): E690-7. Proc Natl Acad Sci U S A. 109 (12): E690-7.
- Licensed Use
- For in vitro research purposes. Any re-sale in any form or any other commercial application needs a written agreement with Bio-Rad.
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