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蚂蚁淘在线 / 品牌中心 / Cosmo / Cosmo/Anti Apoptosis-Antagonizing Transcription Factor (AATF) mAb (Clone 1B2D8)/100 µl/CAC-CE-013A
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Application: ICC, WB, IF, ELISAClonality: MonoclonalHost: RatPurification: IgGReactivity: Mouse, Rat, HumanTranscription factors (TFs) directly interpret the genome, performing the first step in decoding the DNA sequence. Many function as ‘‘master regulators’’ and ‘‘selector genes’’, exerting control over processes that specify cell types and developmental patterning (Lee and Young, 2013) and controlling specific pathways such as immune responses (Singh et al., 2014). In the laboratory, TFs can drive cell differentiation (Fong and Tapscott, 2013) and even de-differentiation and trans-differentiation (Takahashi and Yamanaka, 2016). Mutations in TFs and TF-binding sites underlie many human diseases. Their protein sequences, regulatory regions, and physiological roles are often deeply conserved among metazoans (Bejerano et al., 2004; Carroll, 2008), suggesting that global gene regulatory ‘‘networks’’ may be similarly conserved. And yet, there is high turnover in individual regulatory sequences (Weirauch and Hughes, 2010), and over longer timescales, TFs duplicate and diverge. The same TF can regulate different genes in different cell types (e.g., ESR1 in breast and endometrial cell lines [Gertz et al., 2012]), indicating that regulatory networks are dynamic even within the same organism. Determining how TFs are assembled in different ways to recognize binding sites and control transcription is daunting yet paramount to under-standing their physiological roles, decoding specific functional properties of genomes, and mapping how highly specific expression programs are orchestrated in complex organisms. [from: Lambert SA, Jolma A, Campitelli LF, Das PK, Yin Y. (2018) The Human Transcription Factors. Cell. 172:650-665.]AATF/Che-1/Traube was identified on the basis of its interaction with MAP3K12/DLK, a protein kinase known to be involved in the induction of cell apoptosis. This protein contains an extremely acidic domain and a putative leucine zipper characteristic of transcription factors.References:1) Ishigaki et al. (2010) Cell Death Differ. 17:774-786.
Cosmo蛋白质工程涵盖了为基础和应用研究生产重组蛋白质的一系列扩展方法。目前,尽管遭受多种问题困扰,但基于细胞的蛋白质工程方法仍在广泛使用,包括不溶性,低产量,可变表达,低稳定性,不正确的折叠以及与缺乏活性相关的不正确的二硫键形成。相比之下,无细胞蛋白质工程方法可以直接控制反应条件,从而可以相对容易,快速地合成复杂蛋白质,有毒蛋白质,膜蛋白质和具有非天然氨基酸的新型蛋白质。两种主要类型的无细胞系统是常用的。 第一个和较旧的系统基于支持转录和翻译的粗细胞提取物。最常见的提取物来源是大肠杆菌,酿酒酵母,兔网织红细胞,小麦胚芽和昆虫细胞。无细胞系统的第二种类型是基于上田组的纯的(P rotein合成 ü唱 ř ecombinant ë元素)系统。用于无细胞蛋白质合成的PURE方法基于从亲和纯化的蛋白质成分(1-4)组成的细胞翻译机制的模块重建,其中蛋白质成分包括起始因子(IF1,IF2,IF3),延伸因子(EF-Tu) ,EF-Ts,EF-G),释放因子(RF1,RF2,RF3),核糖体回收因子,20种氨酰基tRNA合成酶,甲硫酰基tRNA甲酰基转移酶和焦磷酸酶。在某些PURE系统方法中,所有蛋白质成分(核糖体除外)都带有6X His标签,可通过金属亲和色谱法随后通过超滤去除核糖体(例如,来自BioComber Co.和New England Biolabs的PURExpress®)。在第二版的PURE系统中(日本的Gene Frontier Corporation生产并由Cosmo Bio在世界范围内分发和支持的PURE frex®),所有蛋白成分均未加标签,从而可以基于任何所需标签(包括他的标签。在这两种情况下,重组成分都与核糖体和从特制大肠杆菌中分离的tRNA结合在一起 菌株,以及所有必需的NTP和氨基酸,ATP生成的催化模块和重组T7 RNA聚合酶,创建了一个独立的反应系统,可以使用多种DNA模板对它们进行编程以进行蛋白质合成。PURE系统的优势包括降低了污染的蛋白酶,核酸酶和磷酸酶的水平,由于化学方法更加明确,产生了更高的重现性,以及模块化系统的灵活性。可以完全避免耗尽细胞提取物中氨基酸库的代谢副反应。因为它们是模块化的,所以PURE系统支持各种针对特殊应用的修饰,包括核糖体展示和非天然氨基酸的位点选择性掺入。