购物车
  • 全部删除
  • TargetMol
    您的购物车当前为空

Toxin A Protein, Clostridioides difficile, Recombinant (His)

产品编号 TMPH-00403

Toxin A Protein, Clostridioides difficile, Recombinant (His) is expressed in E. coli.

Toxin A Protein, Clostridioides difficile, Recombinant (His)

Toxin A Protein, Clostridioides difficile, Recombinant (His)

产品编号 TMPH-00403
Toxin A Protein, Clostridioides difficile, Recombinant (His) is expressed in E. coli.
规格价格库存数量
20 μg
¥ 2,290
20日内发货
100 μg
¥ 4,750
20日内发货
1 mg
¥ 16,000
20日内发货
大包装 & 定制
加入购物车
TargetMol 的所有产品仅用作科学研究或药证申报,不能被用于人体,我们不向个人提供产品和服务。请您遵守承诺用途,不得违反法律法规规定用于任何其他用途。
实验操作小课堂
常见问题解答
化合物带有盐酸盐离子、硫酸盐离子等是否和其本身有什么区别?盐形式和游离态有什么区别?
盐和非盐形式化合物的活性分子是一样的,在生物实验中起到的效果也一致,活性和使用方法都是一样的。只是由于呈盐不同,物理性质比如溶解度会有差异。建议您根据溶解、实验需求进行选择。
如何选择某个靶点的特异性或总的抑制剂?特异性和非特异性的区别是什么?
抑制剂按照特异性分为广谱 pan 和特异性 selective 两种。Pan 为某个靶点总的抑制剂,对所有亚型或整个家族的成员都有抑制作用。Selective 抑制剂针对某个蛋白激酶的某个亚型或家族中某个成员抑制率特别高或有特异性抑制作用。 一般评价一个抑制剂的抑制效率主要看 IC50 值,IC50 值越低,说明抑制剂效率越高。建议您根据以上几个特征进行综合选择,也可联系技术帮您推荐相关抑制剂。
查看更多

产品信息

生物活性
Activity has not been tested. It is theoretically active, but we cannot guarantee it. If you require protein activity, we recommend choosing the eukaryotic expression version first.
产品描述
Toxin A Protein, Clostridioides difficile, Recombinant (His) is expressed in E. coli.
种属
Clostridioides difficile
表达系统
E. coli
标签N-6xHis
蛋白编号P16154
别名
Toxin A,toxA,tcdA
氨基酸序列
ASTGYTSINGKHFYFNTDGIMQIGVFKGPNGFEYFAPANTDANNIEGQAILYQNKFLTLNGKKYYFGSDSKAVTGLRTIDGKKYYFNTNTAVAVTGWQTINGKKYYFNTNTSIASTGYTIISGKHFYFNTDGIMQIGVFKGPDGFEYFAPANTDANNIEGQAIRYQNRFLYLHDNIYYFGNNSKAATGWVTIDGNRYYFEPNTAMGANGYKTIDNKNFYFRNGLPQIGVFKGSNGFEYFAPANTDANNIEGQAIRYQNRFLHLLGKIYYFGNNSKAVTGWQTINGKVYYFMPDTAMAAAGGLFEIDGVIYFFGVDGVKAPGIYG
蛋白构建
2387-2710 aa
蛋白纯度
> 85% as determined by SDS-PAGE.
分子量40.1 kDa (predicted)
内毒素< 1.0 EU/μg of the protein as determined by the LAL method.
缓冲液Tris-based buffer, 50% glycerol
复溶方法
A Certificate of Analysis (CoA) containing reconstitution instructions is included with the products. Please refer to the CoA for detailed information.
存储
Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.
运输方式In general, Lyophilized powders are shipping with blue ice. Solutions are shipping with dry ice.
研究背景
Precursor of a cytotoxin that targets and disrupts the colonic epithelium, inducing the host inflammatory and innate immune responses and resulting in diarrhea and pseudomembranous colitis. TcdA and TcdB constitute the main toxins that mediate the pathology of C.difficile infection, an opportunistic pathogen that colonizes the colon when the normal gut microbiome is disrupted. Compared to TcdB, TcdA is less virulent and less important for inducing the host inflammatory and innate immune responses. This form constitutes the precursor of the toxin: it enters into host cells and mediates autoprocessing to release the active toxin (Glucosyltransferase TcdA) into the host cytosol. Targets colonic epithelia by binding to some receptor, and enters host cells via clathrin-mediated endocytosis. Binding to LDLR, as well as carbohydrates and sulfated glycosaminoglycans on host cells suface contribute to entry into cells. In contrast to TcdB, Frizzled receptors FZD1, FZD2 and FZD7 do not act as host receptors in the colonic epithelium for TcdA. Once entered into host cells, acidification in the endosome promotes the membrane insertion of the translocation region and formation of a pore, leading to translocation of the GT44 and peptidase C80 domains across the endosomal membrane. This activates the peptidase C80 domain and autocatalytic processing, releasing the N-terminal part (Glucosyltransferase TcdA), which constitutes the active part of the toxin, in the cytosol.; Active form of the toxin, which is released into the host cytosol following autoprocessing and inactivates small GTPases. Acts by mediating monoglucosylation of small GTPases of the Rho family (Rac1, RhoA, RhoB, RhoC, Rap2A and Cdc42) in host cells at the conserved threonine residue located in the switch I region ('Thr-37/35'), using UDP-alpha-D-glucose as the sugar donor. Monoglucosylation of host small GTPases completely prevents the recognition of the downstream effector, blocking the GTPases in their inactive form, leading to actin cytoskeleton disruption and cell death, resulting in the loss of colonic epithelial barrier function. Also able to catalyze monoglucosylation of some members of the Ras family (H-Ras/HRAS, K-Ras/KRAS and N-Ras/NRAS), but with much less efficiency than with Rho proteins, suggesting that it does not act on Ras proteins in vivo.

SCI 文献

计算器

  • 复溶 计算器
  • 重组蛋白稀释 计算器
  • 比活力 计算器

技术支持

请阅读 重组蛋白用户指南 了解更多具体信息.

关键词

失败
网络或系统异常,请稍后再试