| 货号 | 14482S |
| 供应商 | CST |
| 背景 | Ubiquitin is a conserved polypeptide unit that plays an important role in the ubiquitin-proteasome pathway. Ubiquitin can be covalently linked to many cellular proteins by the ubiquitination process, which targets proteins for degradation by the 26S proteasome. Three components are involved in the target protein-ubiquitin conjugation process. Ubiquitin is first activated by forming a thiolester complex with the activation component E1; the activated ubiquitin is subsequently transferred to the ubiquitin-carrier protein E2, then from E2 to ubiquitin ligase E3 for final delivery to the epsilon-NH2 of the target protein lysine residue (2-4). The ubiquitin-proteasome pathway has been implicated in a wide range of normal biological processes and in disease-related abnormalities. Several proteins such as IκB, p53, cdc25a and bcl-2 have been shown to be targets for the ubiquitin-proteasome process as part of regulation of cell cycle progression, differentiation, cell stress response, and apoptosis (5-8). In this assay, the PTMScan® Ubiquitin Remnant Motif (K-ε-GG) Antibody Bead Conjugate, a proprietary ubiquitin branch (“K-ε-GG”) antibody with specificity for a di-glycine tag that is the remnant of ubiquitin left on protein substrates after trypsin digestion, is used to enrich ubiquitinated peptides from trypsin digested cell samples. This enrichment is followed by LC-MS/MS analysis for quantitative profiles of hundreds to over a thousand non-redundant ubiquitinated sequences. |
| 存放说明 | -20C |
| 参考文献 | 1 . Ciechanover, A. (1998) EMBO J 17, 7151-60. 2 . Hochstrasser, M. (2000) Nat Cell Biol 2, E153-7. 3 . Hochstrasser, M. (2000) Science 289, 563-4. 4 . Bernardi, R. et al. (2000) Oncogene 19, 2447-54. 5 . Aberle, H. et al. (1997) EMBO J 16, 3797-804. 6 . Salomoni, P. and Pandolfi, P.P. (2002) Nat Cell Biol 4, E152-3. 7 . Rush, J. et al. (2005) Nat Biotechnol 23, 94-101. 8 . Jesenberger, V. and Jentsch, S. (2002) Nat Rev Mol Cell Biol 3, 112-21. |
Motif analysis was done using all ubiquitin remnant peptides in a ubiquitin remnant motif antibody PTMScan® study. Cellular tryptic peptides from HCT 116 cells, untreated or treated with MG-132 #2194, were immunoprecipitated with ubiquitin remnant motif antibody K-ε-GG and analyzed by OrbiTrap™ LC-MS. The study gave 599 non-redundant sites. The motif logo shows that the K-ε-GG antibody is a general motif antibody that recognizes the K-ε-GG motif and does not have other amino acid preferences. |
