种属
Human
表达宿主
HEK293 cells
描述
Recombinant Human Fc-gamma RIII alpha/CD16a Protein is produced by HEK293 expression system. The target protein is expressed with sequence (Gly17-Gln208) of human Fc gamma RIIIA/CD16a (Accession #NP_001121065.1) fused with a 6×His tag at the C-terminus.
标签
C-His
纯度
> 95% by SDS-PAGE.
内毒素
< 0.1 EU/μg of the protein by LAL method.
生物活性
1.Measured by its binding ability in a functional ELISA. Immobilized Human FCGR3A at 1 μg/mL (100 μL/well) can bind FCGR3A Mouse mAb with a linear range of 0.13-6.1 ng/mL.
2.Measured by its binding ability in a functional ELISA.Immobilized Human FCGR3A at 1 μg/mL (100 μL/well) can bind FCGR3A Mouse mAb with a linear range of 0.06-7.1 ng/mL.
2.Measured by its binding ability in a functional ELISA.Immobilized Human FCGR3A at 1 μg/mL (100 μL/well) can bind FCGR3A Mouse mAb with a linear range of 0.06-7.1 ng/mL.
制剂
Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.Contact us for customized product form or formulation.
储存
Store the lyophilized protein at -20°C to -80 °C for long term.
After reconstitution, the protein solution is stable at -20 °C for 3 months, at 2-8 °C for up to 1 week.
After reconstitution, the protein solution is stable at -20 °C for 3 months, at 2-8 °C for up to 1 week.
复溶
Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid votex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.
研究方向
Fc gamma RIIIA/CD16a 蛋白作为免疫球蛋白 gamma (IgG) 不变 Fc 片段的受体，在与细胞表面展示的聚集的抗原-IgG 复合物结合时最佳激活，启动抗体依赖性细胞毒性 (ADCC)。该过程涉及抗体包被细胞的裂解，防止在没有抗原触发的情况下效应细胞的不适当激活。该蛋白介导自然杀伤 (NK) 细胞上的 IgG 效应器功能，结合感染过程中产生的抗原-IgG 复合物，触发 NK 细胞依赖性细胞因子的产生和脱颗粒。Fc gamma RIIIA/CD16a 对于生成类似记忆的适应性 NK 细胞至关重要，这些细胞可通过 ADCC 有效消除病毒感染的细胞。它调节 NK 细胞的存活、增殖，并防止 NK 细胞祖细胞凋亡。作为 Fc 结合亚基，它与 CD247 和/或 FCER1G 接头结合形成功能性信号传导复合物，导致驱动 NK 细胞激活的细胞内信号传导级联。该蛋白还在介导治疗性抗体的抗肿瘤活性、触发 IgG 包被肿瘤细胞的 TNFA 依赖性 ADCC 以及增强对无岩藻糖基化 IgG 的 ADCC 反应方面发挥作用。在登革热病毒感染的情况下，FcγRIIIA/CD16a通过抗体依赖性增强（ADE）机制参与发病机制，促进病毒进入骨髓细胞并随后在继发感染期间进行病毒复制。
背景信息
This protein is a receptor for the Fc portion of immunoglobulin G, and it is involved in the removal of antigen-antibody complexes from the circulation, as well as other other antibody-dependent responses. The protein is expressed on natural killer (NK) cells as an integral membrane glycoprotein anchored through a transmembrane peptide, whereas FCGR3B is expressed on polymorphonuclear neutrophils (PMN) where the receptor is anchored through a phosphatidylinositol (PI) linkage. Mutations in this gene have been linked to susceptibility to recurrent viral infections, susceptibility to systemic lupus erythematosus, and alloimmune neonatal neutropenia.