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冻干粉,天然 级 提供 ≥95%(SDS-PAGE) 纯度,适用于对基线干扰要求严格的色谱和分析工作流程。
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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
α2‑巨球蛋白是一种广谱蛋白酶抑制剂,同时可作为细胞因子、生长因子以及锌离子的载体。前沿研究正在探究 A2M 在蛋白酶介导的炎症与组织损伤中的作用。
蛋白生物学功能
α‑2‑巨球蛋白(A2M)是分子量为 725 kDa 的大型血浆糖蛋白,男性血浆浓度为 240 mg/100 mL,女性为 290 mg/100 mL。该多功能蛋白依靠独特的 “捕蝇草” 机制发挥作用:形成四聚体笼状结构包裹蛋白酶,从而抑制所有催化类型的蛋白酶。除抑制蛋白酶之外,A2M 能够结合并转运细胞因子、生长因子、锌离子以及受损蛋白。它可促进细胞迁移,通过协助抗原加工提升免疫功能,并可促进辐照个体体内的淋巴细胞再生。
常见研究用途
肾病综合征、肝硬化、糖尿病及重度烧伤状态下 A2M 水平升高;与之相反,急性胰腺炎、高纤溶状态、败血症中 A2M 水平降低。研究表明,A2M 可结合并清除 β‑淀粉样肽,参与阿尔茨海默病的病理进程。临床研究显示 A2M 具备开发为骨关节炎治疗药物的潜力,可抑制软骨降解酶。
常见应用方向:蛋白酶水解相关研究、金属离子结合研究、生物治疗研究。
Alpha 2 Macroglobulin is a broad spectrum protease inhibitor which also serves as a carrier for cytokines, growth factors, and zinc. Emerging research investigates the role of A2M in protease mediated inflammation and damage.
Role of protein in biology
Alpha-2-macroglobulin (A2M) is a large (725 KDa) plasma glycoprotein found at concentrations of 240 mg/100 ml in men and 290 mg/100 ml in women. This versatile protein functions through a unique "venus-flytrap" mechanism, inhibiting proteases of all catalytic types by forming a tetrameric cage around them.
Beyond protease inhibition, A2M binds and transports cytokines, growth factors, zinc, and damaged proteins. It promotes cell migration, enhances immune function by facilitating antigen processing, and stimulates lymphocyte regeneration in irradiated subjects.
Common research uses
A2M levels increase in nephrotic syndrome, liver cirrhosis, diabetes, and severe burn. Conversely, levels decrease in acute pancreatitis, hyperfibrinolytic states, and septicemia. Research indicates A2M's involvement in Alzheimer's disease pathology through binding and clearing amyloid-beta peptides.
Clinically, A2M shows promise as a therapeutic agent for osteoarthritis, where it inhibits cartilage-degrading enzymes.
Common uses include proteolytic enzyme studies, metal binding studies, biotherapeutic studies.