霍乱毒素 用途与合成方法
霍乱毒素是由霍乱弧菌分泌的一种蛋白质复合物,是霍乱弧菌引起严重疾病所必需的。 霍乱毒素由(Cholera toxin,CT)两个亚单位组成,即A亚单位(CTA)和B亚单位(CTB)。A亚单位是霍乱毒素的活性部分,B亚单位的主要功能是通过与哺乳动物小肠上皮细胞上的单唾液酸神经节苷脂GM1结合而使得A亚单位进入细胞。5个CTB与1个CTA以氢键和盐桥连接在一起,形成紧凑而稳定的AB5圆筒状六聚体蛋白。霍乱毒素被认为是最有效的口服免疫原之一。口服CT不但可以使机体产生针对CT的免疫反应,而且可以增强与CT同时给予的其他抗原的免疫反应。
霍乱毒素可以增强肠粘膜的通透性,从而增加抗原的摄入量;
选择性诱导以Th2为主的免疫反应,从而增加特异性黏膜IgA抗体的产生;
可诱导IL-4和IL-5显著提高,而IL-2和IFN-gamma水平无明显变化。
In the ER, a portion of Cholera toxin, the enzymatic A1-chain, is unfolded by protein disulfide isomerase and retro-translocated to the cytosol by hijacking components of the ER associated degradation pathway for misfolded proteins.
Cholera toxin acts as an ADP-ribosyltransferase to disrupt intracellular signaling in the target cell. Cholera toxin moves by vesicle carriers from the cell surface to the endoplasmic reticulum (ER) of an intoxicated cell.
安全信息
危险品标志 | T |
---|---|
危险类别码 | 24/25-52/53 |
安全说明 | 36/37-45-61 |
危险品运输编号 | 3172 |
WGK Germany | 2 |
RTECS号 | LF3100000 |
危险等级 | 6.1 |
包装类别 | I |
毒性 | cholera toxin is secreted by the gram-negative bacterium Vibrio cholerae. It is a gastrointestinal toxin that increases adenylate cyclase activity of mucosa of the small intestine, thereby increasing cyclic AMP within these cells. Cyclic AMP stimulates active transport of ions by these epithelial cells, resulting in a large efflux of Na+ and water into the gut. The toxin enters cells by interacting with a GM1 ganglioside on the cell surface. After entry, the A1 subunit catalyzes the transfer of an ADP-ribose unit from NAD+ to an arginine side chain of the adenylate cyclase regulatory G protein, blocking its GTPase activity. Thus the adenylate cyclase deactivation mechanism is destroyed, and cyclic AMP is continually produced. The major sign of cholera poisoning is severe diarrhea; several liters of body water may be lost within a few hours, leading to shock and death if fluid is not replaced. Treatment involves physiological support (including i.v. fluids) and antibiotics. |
霍乱毒素 价格(试剂级)
更新日期 | 产品编号 | 产品名称 | CAS号 | 包装 | 价格 |
---|---|---|---|---|---|
2024-11-08 | HY-P1446 | 霍乱毒素 | 9012-63-9 | 500 μg | 8480 |
2023-03-20 | HY-P1446 | 霍乱毒素 | 9012-63-9 | 1 mg | 9200 |
霍乱毒素供应商 更多
武汉易泰科技有限公司上海分公司
联系电话:821-50328103-801 18930552037
产品介绍:
英文名称:CHOLERA TOXIN
CAS:9012-63-9
纯度:98% HPLC
包装信息:1g;5g;25g;100g
广州爱纯医药科技有限公司
联系电话:020-39119399 18927568969
产品介绍:
中文名称:霍乱毒素
英文名称:Cholera Toxin
CAS:9012-63-9
纯度:>=98.0%
包装信息:1Mg;5Mg;25Mg;50Mg
备注:品牌:StdSun | 提供定制合成服务(包括:小分子,药物杂质及医药中间体)
Sigma-Aldrich西格玛奥德里奇(上海)贸易有限公司
联系电话:021-61415566 800-8193336
产品介绍:
英文名称:Cholera Toxin
CAS:9012-63-9
纯度:~ 95 % SDS-PAGE, lyophilized powder
包装信息:0.5mg, 1mg, 2mg
备注:C8052
北京沃凯生物科技有限公司
联系电话:010-010-010-62971590 18548936886
产品介绍:
英文名称:Choleratoxin
CAS:9012-63-9
纯度:90%
包装信息:500ug
备注:试剂级
天津普西唐生物医药科技有限公司
联系电话:010-60605840 15801484223;
产品介绍:
中文名称:霍乱毒素
英文名称:Cholera toxin
CAS:9012-63-9
纯度:90%
包装信息:500ug;1mg