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Merck
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主要文件

H9395

Sigma-Aldrich

α-溶血素 来源于金黄色葡萄球菌

lyophilized powder, Protein ~60 % by Lowry, ≥10,000 units/mg protein

别名:

α-毒素

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About This Item

CAS号:
MDL编号:
UNSPSC代码:
12352202
NACRES:
NA.56
价格与库存信息目前不能提供

生物来源

Staphylococcus aureus

质量水平

表单

lyophilized powder

比活

≥10,000 units/mg protein

包含

sodium citrate buffer as balance

组成

Protein, ~60% Lowry

溶解性

H2O: soluble 0.49-0.51 mg/mL

UniProt登记号

储存温度

2-8°C

基因信息

Staphylococcus aureus ... SAOUHSC_01121(3920722)

一般描述

α-溶血素是一种成孔细胞毒素[1],它是大多数致病性金黄色葡萄球菌菌株分泌的一种细胞外蛋白。它是以水溶性单体的形式分泌,是一种小型β桶状蛋白。 [1]

应用

α-来自金黄色葡萄球菌的溶血素已被用于:
  • 作为电解质溶液的一种成分,用于通过电生理测量测试脂双层中的孔形成[2]
  • 测试其在骨髓基质细胞(BMSCs)中的成骨抑制作用[3]
  • 制备用于 Biacore 和表面等离子体共振的α溶血素分子印迹聚合物 (MIP)[4]

α-溶血素被用于一项研究,用于测试乳制品大肠杆菌的外排泵和溶血素活性。它还用于测试其对苯扎氯铵的适应性以及环丙沙星对生物膜形成的影响。[5]

生化/生理作用

α-溶血素是选择性溶血的,单体形式与膜结合,结合不需要特异性受体。在与生物膜和/或人造膜结合后,它会发生自身低聚化,从而产生代表跨膜孔的环状结构(六聚体),这些孔对离子和小代谢物是通透的。[1]它对兔红细胞有明显的偏好。[6]α-溶血素刺激细胞磷脂酶并诱导 Ca2+流入。[7]它导致内皮屏障的膜破坏和细胞质成分的泄漏[1]和细胞的渗透裂解。[6]α-溶血素与脓毒症的发病机制有关。[4]

包装

包装尺寸基于蛋白质含量

单位定义

一个溶血单元是在 37°C 下 30 分钟,然后在 4°C 下冷藏 30 分钟后,悬浮在 pH 7.0 磷酸盐缓冲盐水中含1% 牛血清白蛋白的 1% 兔红细胞有50%溶解。

象形图

Health hazardExclamation mark

警示用语:

Warning

危险声明

危险分类

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 2

靶器官

Lungs,Blood

储存分类代码

11 - Combustible Solids

WGK

WGK 3

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

Eyeshields, Gloves, type N95 (US)


历史批次信息供参考:

分析证书(COA)

Lot/Batch Number

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Ankita Pagedar et al.
The Journal of dairy research, 79(4), 383-389 (2012-08-10)
The present study investigates the effect of adaptive resistance to ciprofloxacin (Cip) and benzalkonium chloride (BC) on biofilm formation potential (BFP), efflux pump activity (EPA) and haemolysin activity of Escherichia coli isolates of dairy origin. All the isolates, irrespective of
Gregory J Digby et al.
The Journal of physiology, 586(14), 3325-3335 (2008-05-24)
Signalling by heterotrimeric G proteins is often isoform-specific, meaning certain effectors are regulated exclusively by one family of heterotrimers. For example, in excitable cells inwardly rectifying potassium (GIRK) channels are activated by G betagamma dimers derived specifically from G(i/o) heterotrimers.
Bryan J Berube et al.
Toxins, 5(6), 1140-1166 (2013-07-31)
Staphylococcus aureus secretes a number of host-injurious toxins, among the most prominent of which is the small β-barrel pore-forming toxin α-hemolysin. Initially named based on its properties as a red blood cell lytic toxin, early studies suggested a far greater
Rakez Kayed et al.
The Journal of biological chemistry, 284(7), 4230-4237 (2008-12-23)
Amyloid oligomers are believed to play causal roles in several types of amyloid-related neurodegenerative diseases. Several different types of amyloid oligomers have been reported that differ in morphology, size, or toxicity, raising the question of the pathological significance and structural
Muhmmad Omar-Hmeadi et al.
Traffic (Copenhagen, Denmark), 19(6), 436-445 (2018-03-16)
Phosphoinositides (PtdIns) play important roles in exocytosis and are thought to regulate secretory granule docking by co-clustering with the SNARE protein syntaxin to form a docking receptor in the plasma membrane. Here we tested this idea by high-resolution total internal

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Cell lysis and protein extraction methods overview various techniques, from detergent solubilization to mechanical disruption, supporting research needs.

Cell lysis and protein extraction methods overview various techniques, from detergent solubilization to mechanical disruption, supporting research needs.

Cell lysis and protein extraction methods overview various techniques, from detergent solubilization to mechanical disruption, supporting research needs.

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Questions

  1. We suspended in the product H9395 in 12.5 ml of PBS (our usual water-based infection solvent), flash-froze the aliquots in liquid nitrogen, and stored the aliquots at -80 C. There was no apparent issue with resuspension in PBS vs water. However, we observed no hemolytic activity in our in vivo mouse study or an in vitro quantitative hemolysis assay performed with rabbit blood.

    1 answer
    1. The stability of stock solutions of this enzyme has not been evaluated. However, it is cited in Methods in Enzymology, 165, 3-7 (1988) that at concentrations greater than 2 mg of protein per ml it can be stored at -20 °C without loss of hemolytic titer.

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