Recombinant Human Poly-Ub WT Chains (1-7) (K48-linked), CF
Recombinant Human Poly-Ub WT Chains (1-7) (K48-linked), CF Summary
8.6 kDa (Ub), 17 kDa (Ub2), 26 kDa (Ub3), 34 kDa (Ub4), 43 kDa (Ub5), 52 kDa (Ub6), and 60 kDa (Ub7)
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a solution in deionized water.|
|Reconstitution||Reconstitute at 5 mg/mL in an aqueous solution.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
Poly-Ubiquitin chains are composed of Ubiquitin monomers that are covalently linked through isopeptide bonds, which typically form between a lysine residue of one Ubiquitin molecule and the C-terminal glycine residue of another Ubiquitin molecule (1). Each human Ubiquitin monomer is 76 amino acids (aa) in length and shares 96% and 100% aa identity with yeast and mouse Ubiquitin, respectively (2). Seven of the 76 aa in Ubiquitin are lysine residues that can participate in poly-Ubiquitin chain formation. Linkage through specific lysine residues is thought to serve as a signal that affects protein degradation, signaling, trafficking, and other cellular processes (3-8).
Linkage specific poly-Ubiquitin chains are used to investigate mechanisms of chain recognition,binding and hydrolysis by the proteasome, deubiquitinating enzymes, E3 ligases or other proteinsthat contain ubiquitin-associated domains (UBAs) or ubiquitin-interacting motifs (UIMs). Lys48-linked chains are abundant in vivo and act as a universal signal for proteasomal degradation. This product is formed with wild-type human recombinant Ubiquitin and linkage-specific enzymes.The poly-Ubiquitin chain mixture contains mono-Ubiquitin and higher MW species up to hepta-Ubiquitin.
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- Behrends, C. & J.W. Harper (2011) Nat. Struct. Mol. Biol. 18:520.
- Greene, W. et al. (2012) PLoS Pathog. 8:e1002703.
- Henry, A.G. et al. (2012) Dev. Cell 23:519.
- Tong, X. et al. (2012) J. Biol. Chem. 287:25280.
- Wei, W. et al. (2004) Nature 428:194.
- Zhang, J. et al. (2012) J. Biol. Chem. 287:28646.
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