Cell Cycle / Checkpoint Control
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| CSTコード | 包装 | 希望納入価格（円） |
国内在庫  2010年9月9日14時20分 現在 |
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| #6241S | 300 μL | 50,000 | ログインすると国内在庫状況がご確認いただけます。
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| テストした細胞種 | |
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| HeLa（ヒト）、COS（サル） | |
| 特異性 | |
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| Chk1 タンパク質の発現を抑制します。 | |
| 貯法 | |
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| -20℃ | |
| 社内データ |
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Western Blotting
Western blot analysis of extracts from HeLa cells transfected with non-targeted (-) or targeted (+) siRNA. Chk1 was detected using the Chk1 Antibody #2345, and p42 was detected using the p42 MAPK Antibody #9108. The Chk1 Antibody confirms silencing of Chk1 expression, and the p42 MAPK Antibody was used to control for loading and specificity of Chk1 siRNA.
Fluorescent Detection
Fluorescent detection of SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 in living HeLa cells 24 hours post-transfection, demonstrating nearly 100% transfection efficiency.
| バックグラウンド |
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Chk1 kinase acts downstream of ATM/ATR kinase to play an important role in DNA damage checkpoint control, embryonic development and tumor suppression (1). Activation of Chk1 involves phosphorylation of Ser317 and Ser345 and occurs in response to blocked DNA replication and certain forms of genotoxic stress (2). Phosphorylation at Ser 345 serves to localize Chk1 to the nucleus (3) following checkpoint acitvation while recently phosphorylation at Ser 317 along with site-specific phosphorylation of PTEN was shown to allow for reentry into the cell cycle following stalled DNA replication. (4). Chk1 exerts it checkpoint mechanism on the cell cycle in part by regulating the cdc25 family of phosphatases. Chk1 phosphorylation of cdc25A targets it for proteolysis and inhibits it's activity though 14-3-3 binding. (5). Activated Chk1 can inactivate cdc25C via phosphorylation at Ser216, blocking the activation of cdc2 and transition into mitosis (6). Also, centrosomal Chk1 has been shown to phosphorylate cdc25B inhibiting its activation of CDK1-cyclin B1 and thus mitotic spindle formation and chromatin condensation (7). Furthermore, Chk1 plays a role in spindle checkpoint function through regulation of Aurora B and BubR1 (8). Chk1 has emerged as a drug target for cancer therapy as its inhibition leads to cell death in many cancer cell lines (9).
Small Interfering RNA (siRNA) has been used to specifically silence chk1 in various human cancer cell lines (5).
- Liu, Q. et al. (2000) Genes Dev 14, 1448-59.
- Zhao, H. and Piwnica-Worms, H. (2001) Mol Cell Biol 21, 4129-39.
- Jiang, K. et al. (2003) J Biol Chem 278, 25207-17.
- Martin, S.A. and Ouchi, T. (2008) Mol Cancer Ther 7, 2509-16.
- Chen, M.S. et al. (2003) Mol Cell Biol 23, 7488-97.
- Zeng, Y. et al. (1998) Nature 395, 507-10.
- Löffler, H. et al. (2006) Cell Cycle 5, 2543-7.
- Zachos, G. et al. (2007) Dev Cell 12, 247-60.
- Garber, K. (2005) J Natl Cancer Inst 97, 1026-8.
- Chen, Z. et al. (2003) Mol. Cancer Ther. 2(6) , 543-548.
| 使用例 | |
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本製品は試験研究用です。
