Fc gamma RIIIA/CD16a 蛋白, Human (HEK293, His)

Fc gamma RIIIA/CD16a protein is a receptor for the Fc fragment of IgG and activates antibody-dependent cellular cytotoxicity (ADCC) upon binding to antigen-IgG complexes. It mediates IgG effector functions on NK cells, generating memory-like adaptive NK cells to efficiently eliminate virally infected cells. Fc gamma RIIIA/CD16a Protein, Human (HEK293, His) is the recombinant human-derived Fc gamma RIIIA/CD16a protein, expressed by HEK293 , with C-6*His labeled tag. The total length of Fc gamma RIIIA/CD16a Protein, Human (HEK293, His) is 192 a.a., with molecular weight of 36-44 kDa.

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。

Measured by its binding ability in a functional ELISA. Immobilized Human FcγRIIIA / CD16a recombinant protein at 2μg/mL(100 μL/well) can bind Human IgG1. The ED₅₀ for this effect is 490.6 ng/mL, corresponding to a specific activity is 2238.3 Unit/mg.

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  Measured by its binding ability in a functional ELISA. Immobilized Human FcγRIIIA / CD16a recombinant protein at 2μg/mL(100 μL/well) can bind Human IgG1.The ED₅₀ for this effect is 490.6ng/mL, corresponding to a specificactivity is 2238.3 Unit/mg.

Human

HEK293

C-6*His

P08637 (G17-Q208)

2214  [NCBI]

GMRTEDLPKAVVFLEPQWYRVLEKDSVTLKCQGAYSPEDNSTQWFHNESLISSQASSYFIDAATVDDSGEYRCQTNLSTLSDPVQLEVHIGWLLLQAPRWVFKEEDPIHLRCHSWKNTALHKVTYLQNGKGRKYFHHNSDFYIPKATLKDSGSYFCRGLFGSKNVSSETVNITITQGLAVSTISSFFPPGYQ

36-44 kDa

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  Greater than 95% as determined by reducing SDS-PAGE.

无菌粉末.

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or 20 mM PB, 150 mM NaCl, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.