The correctness of linkage and purity of AQUApure Tetra-Ub Chains (K11-linked) Protein (Catalog #UC-45) was assessed using the Absolute Quantitation of Ubiquitin method (Ub-AQUA), an LCMS-based technique that provides ...read more
Will be discontinued when existing inventory is gone.
Details of Functionality
Reaction conditions will need to be optimized for each specific application. IMPORTANT: Heating this product in SDS-PAGE buffer or terminating reactions containing this product with heated SDS-PAGE buffer could lead to unexpected, high apparent molecular weight banding or smearing on gels that is not representative of product purity. For optimal results, we recommend incubation in SDS-PAGE buffer + DTT at <40 °C for 20 minutes prior to gel electrophoresis.
Source
E. coli-derived human Tetra-Ubiquitin protein Met1 - Gly76
>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
34 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using UC-45 in the following applications:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
6 months from date of receipt, -20 to -70 °C as supplied.
3 months, -20 to -70 °C under sterile conditions after opening.
Buffer
Supplied as a solution in deionized water.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for AQUApure Tetra-Ub Chains (K11-linked) Protein, CF
HEL-S-50
TetraUbiquitin
Tetra-Ubiquitin
Ub4
UBB
ubiquitin B
Background
Ubiquitin chains vary in length, linkage, and function. K11-linked Tetra-Ubiquitin Chains (Ub4) are ideal for investigating Ubiquitin-binding proteins and as substrates for Ubiquitin-specific isopeptidases. Linkage specific Poly-Ubiquitin chains may be used as a substrate for in vitro reactions with deubiquitinating enzymes ("DUB's") that cleave the peptide or isopeptide linkage between adjacent Ubiquitin molecules. Poly-Ubiquitin chains can also be used to investigate mechanisms of binding and recognition between the chains and other proteins that contain Ubiquitin-Associated domains (UBAs), Ubiquitin-interacting motifs (UIMs), ZnF's and/or other Ubiquitin-sensing elements. K11-linked Tetra-Ubiquitin chains are manufactured using recombinant Ubiquitin and purely enzymatic techniques to avoid the potential for contaminating synthetic intermediates.
Kirkpatrick, D.S., et al. (2006) Nat Cell Biol. 8:700.
Ordureau, A., et al. (2014) Mol. Cell 56:360.
Ordureau, A., et al. (2015) Pro. Nat. Acad. of Sci. USA 112: 6637.
Phu, L., et al. (2011) Mol Cell Proteomics 10: M110.003756.
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