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一般說明
拓扑异构酶 Ⅱα由位于人类染色体 17q21.2 上的 TOP2A 基因编码。通过在复制、重组和转录过程中可逆地断裂 DNA 链,对控制 DNA 的拓扑状态至关重要。TOP2A 在细胞周期的 S 期晚期和 G2/M 期表达增加,有丝分裂后表达减少。TOP2A 的多态性引起染色体不稳定和肿瘤发生。TOP2A 在乳腺癌、卵巢癌和前列腺癌等多种癌症类型中引起肿瘤增殖和侵袭性。
拓扑异构酶 Ⅱα(拓扑 iiα)是一种具有保守催化活性的基因产物,它促进 DNA 损伤的进程。α异构体存在于增殖细胞中。
應用
人拓扑异构酶 Ⅱα已用于 DNA 切割试验。
拓扑异构酶 Ⅱα在一项研究中被用于评估人类大脑的衰老过程。 拓扑异构酶 Ⅱα也被用于研究其在 HIV-1 复制中的活性。
生化/生理作用
用于研究 DNA 结构和拓扑结构。
單位定義
一个单元将在37℃ 下 30 min内衰减 0.2μg 的动基体 DNA。
外觀
缓冲甘油水溶液,含有三羟甲基氨基甲烷缓冲液 (pH 7.7)。溶液中还存在其他成分,可从技术服务部获得这些成分的批次特定信息。
準備報告
在专有真核细胞系中过表达的重组酶。
法律資訊
TOPO is a registered trademark of Life Technologies
儲存類別代碼
12 - Non Combustible Liquids
水污染物質分類(WGK)
WGK 1
閃點(°F)
Not applicable
閃點(°C)
Not applicable
Archives of biochemistry and biophysics, 470(1), 27-34 (2007-11-21)
Topoisomerase II alpha (TopoIIalpha) and Topoisomerase II beta (TopoIIbeta) isoforms are different gene products having conserved catalytic activities. The alpha isoform is present in proliferating cell, while beta isoform is predominantly present in non-proliferating cells namely neurons suggesting its role
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Clinical And Translational Oncology, 14(3), 163-168 (2012)
The Journal of clinical investigation, 124(2), 617-630 (2014-01-03)
Doxorubicin is an effective anticancer drug with known cardiotoxic side effects. It has been hypothesized that doxorubicin-dependent cardiotoxicity occurs through ROS production and possibly cellular iron accumulation. Here, we found that cardiotoxicity develops through the preferential accumulation of iron inside
The Journal of pharmacology and experimental therapeutics, 349(1), 99-106 (2014-02-05)
The protein kinase Cδ (PKCδ) interacts with and phosphorylates HuR, dictating its functionality. We show here that the genotoxic stimulus induced by doxorubicin triggers PKCδ interaction with HuR and leads to HuR phosphorylation on serines 221 and 318 and cytoplasmic
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