The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
Fully functional tagged-ubiquitin facilitates the facile visualization of poly-Ubiquitin chains due to larger ladder intervals.
Typical in vitro concentrations for non rate-limiting conjugate formation is 20-100 μM depending on conditions. Supplementation with ubiquitin may be necessary for best results in forming high molecular weight conjugates.
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Preparation and Storage
Stability and Storage
Shipped on dry ice. Upon delivery aliquot and store at -80ºC. Avoid freeze / thaw cycles.
RelevanceFunction: Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling.
Similarity: Belongs to the ubiquitin family.
Contains 3 ubiquitin-like domains.
Cellular localizationCell Membrane, Cytoplasmic and Nuclear
References for Recombinant Human Ubiquitin protein (Chemical Free) (ab81664)
has not yet been referenced specifically in any publications.
Publishing research using ab81664? Please let us know so that we can cite the reference in this datasheet.
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