Recombinant Human Di-Ub (K63-linked) FRET TAMRA Pos1, CF

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Enzyme Activity
Format
Carrier-Free

Order Details

Recombinant Human Di-Ub (K63-linked) FRET TAMRA Pos1, CF Summary

Details of Functionality
Di-Ub (K63-linked) FRET TAMRA is ideal for use as a substrate for Ubiquitin-specific hydrolases with activity toward K63 linkages. We recommend an assay buffer consisting of 50 mM HEPES, pH 7.5, 150 mM NaCl, and 2 mM DTT (omit DTT in assays containing metalloproteases such as AMSH). Fluorescence can be monitored with an excitation wavelength of 544 nm and an emission wavelength of 572 nm. Reaction conditions will need to be optimized for each specific application. We recommend an initial Di-Ub (K63-linked) FRET TAMRA concentration of 100-500 nM.
Source
E. coli-derived human Di-Ubiquitin protein
Accession #
Protein/Peptide Type
Recombinant Proteins
Gene
UBB
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain

Applications/Dilutions

Theoretical MW
17 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 Publication using UF-310.

Packaging, Storage & Formulations

Storage
Protect from light. Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -70 °C as supplied.
  • 3 months, -70 °C under sterile conditions after opening.
Buffer

X mg/ml (X μM) in 50 mM HEPES pH 7.5, 200 mM NaCl

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 Recombinant Human Di-Ub (K63-linked) FRET TAMRA Pos1, CF

  • DiUbiquitin
  • Di-Ubiquitin
  • HEL-S-50
  • Ub2
  • UBB
  • ubiquitin B

Background

With a predicted molecular weight of 17 kDa, Di-Ubiquitin is composed of two Ubiquitin monomers that are covalently linked through an isopeptide bond, 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). Ubiquitin has seven lysine residues that can participate in the formation of poly-Ubiquitin chains. The specific lysine residue used in Ubiquitin conjugation is thought to determine the function of poly-ubiquitination in cellular processes such as protein degradation, signaling, and trafficking (3-8).

Linkage specific di-Ubiquitin is a substrate for enzymes that cleave the isopeptide linkage between two Ubiquitin molecules. These FRET-based DUB substrates with isopeptide bonds between Ubiquitin moieties are superior to gel densitometry assays. Since DUBs recognize and cleave substrates with specific steric conditions, each substrate varies in the position of the fluorophore and quencher and must be empirically tested for individual enzymes.

  1. Scheffner, M. et al. (1995) Nature 373:81.
  2. Sharp, P.M. & W.-H. Li (1987) Trends Ecol. Evol. 2:328.
  3. Behrends, C. & J.W. Harper (2011) Nat. Struct. Mol. Biol. 18:520.
  4. Greene, W. et al. (2012) PLoS Pathog. 8:e1002703.
  5. Henry, A.G. et al. (2012) Dev. Cell 23:519.
  6. Tong, X. et al. (2012) J. Biol. Chem. 287:25280.
  7. Wei, W. et al. (2004) Nature 428:194.
  8. Zhang, J. et al. (2012) J. Biol. Chem. 287:28646.
  9. Buchberger A., et al. (2002) Trends. Cell. Biol. 12:216-221.
  10. Cook W.J., et al. (1992) J. Biol. Chem. 267:16467-16471.
  11. Fischer R.D., et al. (2003) J. Biol. Chem. 278:28976-28984.
  12. Tenno T., et al. (2004) Genes to Cells. 9:865-875.
  13. Varadan R., et al. (2002) J. Mol. Biol. 324:637-647.
  14. Varadan R., et al. (2004) J. Biol. Chem. 279:7055-7063.

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Publications for Di-Ubiquitin (UF-310)(1)

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Bioinformatics

Gene Symbol UBB
Entrez
Uniprot