84-1096-65　［取扱停止］SKI (Sarcoma Viral Oncogene Homolog, Avian, c-SKI, SKV, v-Ski) 50ug　S1013-89V

特徴

• Three Smad transcriptional co-repressors, namely Ski (Sloan-Kettering Institute proto-oncogene), SnoN (Ski-related novel gene, non Alu-containing), and TGIF (TG-interacting factor), have been identified (25,27–29).
• They exert transcriptional repression by numerous mechanisms (30–33).
• Clearly, Smad transcriptional co-repressors are unique regulatory components within the nuclei during the final stage of TGF-1 signaling; hence, their abundance and activity allow the cell to make the decision whether to proceed with the transcription of TGF-1–responsive genes.
• However, despite the obvious importance of Smad transcriptional co-repressors in controlling TGF-1 signaling, the regulation and relative significance of their expression in fibrotic kidney are completely unknown.
• SKI is an 80-90 kD member of the SKI family of oncoproteins.
• SKI is best known for inhibiting TGF-β signaling through its association with the SMAD proteins.
• Human SKI is 728 aa long and contains an N-terminal Cys-rich region (aa 94-192) and a C-terminal coiled-coil oligomerization domain (aa 536-710).
• Over the region used as immunogen, human and mouse SKI protein sequences are 96% identical.
• The Ski and Sno proteins are components of a macromolecular complex containing the co-repressor N-CoR/SMRT, mSin3 and histone deacetylase.
• The complex mediates repression by a number of nuclear hormone receptors and Mad, and MeCP2.
• In addition, Ski and Sno can render cells resistant to TGF-beta by binding to Smads.
• Ski (v-ski) was discovered as a viral oncogene from the genome of avian Sloan-Kettering retrovirus.
• Overexpression of both v-ski and cellular homolog c-ski in avian fibroblasts leads to anchorage-independent growth and morphological transformation of chicken embryo fibroblasts.
• Overexpression of c-ski has also been observed in several types of human cancer cells.
• New results show that Ski associates with Smads2, 3 and 4 proteins in response to TGF-β stimulation.
• Interactions between Ski and Smad2, 3 and 4 blocks Smads-mediated transcriptional activation as well as TGF-β-induced growth suppression of epithelial cells, suggesting oncogenic effects of Ski derive in part through its ability to antagonize the growth-inhibitory signals initiated by members of the TGF-β family of ligands.
• Ski is also required for transcriptional repression mediated by Mad involved in negative regulation of cellular proliferation and plays a role in muscle differentiation.Ski (v-ski) was discovered as a viral oncogene from the genome of avian Sloan-Kettering retrovirus.
• Overexpression of both v-ski and cellular homolog c-ski in avian fibroblasts leads to anchorage-independent growth and morphological transformation of chicken embryo fibroblasts.
• Overexpression of c-ski has also been observed in several types of human cancer cells.
• New results show that Ski associates with Smads2, 3 and 4 proteins in response to TGF-β stimulation.
• Interactions between Ski and Smad2, 3 and 4 blocks Smads-mediated transcriptional activation as well as TGF-β-induced growth suppression of epithelial cells, suggesting oncogenic effects of Ski derive in part through its ability to antagonize the growth-inhibitory signals initiated by members of the TGF-β family of ligands.
• Ski is also required for transcriptional repression mediated by Mad involved in negative regulation of cellular proliferation and plays a role in muscle differentiation.
• Applications:Suitable for use in ELISA, Western Blot, Immunohistochemistry.
• Other applications not tested.
• Recommended Dilution:Western Blot: 1:1000-1:2000Immunohistochemistry: 2-2.5ug/mlOptimal dilutions to be determined by the researcher.
• Storage and Stability:May be stored at 4°C for short-term only.
• For long-term storage and to avoid repeated freezing and thawing, aliquot and store at -20°C.
• Aliquots are stable for at least 12 months at -20°C.
• For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
• Further dilutions can be made in assay buffer