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商品編號(hào)


AG-40T-0500-C100



品牌


Adipogen



公司


Adipogen



公司分類


Proteins



Size

100 ?g

商品信息


More Information



Product Details



Synonyms

UBB; Ubiquitin B



Product Type

Protein



Properties



Source/Host

E. coli



Sequence

Human methylated ubiquitin (Accession Nr. P0CG47) labeled with 13C15N.



Crossreactivity

Human



Label/Conjugates

13C15N



Formulation

Lyophilized from a solution in deionized water.



Other Product Data


Use:
Useful in determining total cellular concentrations of ubiquitin, or determining the ratio of free- to substrate-bound ubiquitin using the protein standard absolute quantification (PSAQ) or related methods. Reductive methylation of lysine residues renders ubiquitin unable to form poly-ubiquitin chains via lysine linkages with other ubiquitin molecules. Methylated ubiquitin can form an E1-catalyzed active thioester at the C-terminus allowing the molecule to be transferred to the lysines of substrate proteins in a mono-ubiquitinated or multi-mono-ubiquitinated fashion. Mass spectrometry is commonly used to quantitate protein concentrations present in cells. This protein is ideal for use as an internal recovery standard. We recommend a protein concentration of 1?g per gram of protein lysate.



Declaration

Manufactured by Boston Biochem



Shipping and Handling



Shipping

BLUE ICE



Short Term Storage

+4°C



Long Term Storage

-20°C



Handling Advice

Aliquot to avoid freeze/thaw cycles.



Use/St
ABI
lity

Stable for at least 1 year after receipt when stored at -20°C.



Documents



MSD
S

No



Product Specification Sheet



Datasheet


Download PDF





Ubiquitin is a 76 amino acid (aa) protein that is ubiquitously expressed in all eukaryotic organisms. ubiquitin is highly conserved with 96% aa sequence identity shared between human and yeast ubiquitin, and 100% aa sequence identity shared between human and mouse ubiquitin. In mammals, four ubiquitin genes encode for two ubiquitin-ribosomal fusion proteins and two poly-ubiquitin proteins. Cleavage of the ubiquitin precursors by deubiquitinating enzymes gives rise to identical ubiquitin monomers each with a predicted molecular weight of 8.6 kDa. Conjugation of ubiquitin to target proteins involves the formation of an isopeptide bond between the C-terminal glycine residue of ubiquitin and a lysine residue in the target protein. This process of conjugation, referred to as ubiquitination or ubiquitylation, is a multi-step process that requires three enzymes: a ubiquitin-activating (E1) enzyme, a ubiquitin-conjugating (E2) enzyme, and a ubiquitin ligase (E3). ubiquitination is classically recognized as a mechanism to target proteins for degradation and as a result, ubiquitin was originally named ATP-dependent Proteolysis Factor 1 (APF-1). In addition to protein degradation, ubiquitination has been shown to mediate a variety of
BIOLOG
ical processes such as signal transduction, endocytosis, and post-endocytic sorting.