Fc gamma RIIIA/CD16a Protein, Human (HEK293, His-HSA)

Fc gamma RIIIA/CD16a Protein, a receptor for the Fc fragment of IgG, activates antibody-dependent cellular cytotoxicity (ADCC) upon binding antigen-IgG complexes. It mediates IgG effector functions on NK cells, generating memory-like adaptive NK cells for efficient virus-infected cell elimination. Fc gamma RIIIA/CD16a regulates NK cell survival, proliferation, and prevents progenitor apoptosis. It forms signaling complexes, driving intracellular cascades for NK cell activation. The protein plays a crucial role in antitumor activities, triggering TNFA-dependent ADCC. In Dengue virus infection, it contributes to pathogenesis via antibody-dependent enhancement (ADE). Fc gamma RIIIA/CD16a Protein, Human (HEK293, His-HSA) is the recombinant human-derived Fc gamma RIIIA/CD16a protein, expressed by HEK293 , with C-10*His, C-HSA labeled tag and F176V mutation. The total length of Fc gamma RIIIA/CD16a Protein, Human (HEK293, His-HSA) is 192 a.a., with molecular weight of 90-115 kDa.

Fc gamma RIIIA/CD16a Protein serves as a receptor for the invariable Fc fragment of immunoglobulin gamma (IgG), optimally activated upon binding clustered antigen-IgG complexes displayed on cell surfaces, initiating antibody-dependent cellular cytotoxicity (ADCC). This process involves the lysis of antibody-coated cells, preventing inappropriate effector cell activation in the absence of an antigenic trigger. The protein mediates IgG effector functions on natural killer (NK) cells, binding antigen-IgG complexes generated during infection to trigger NK cell-dependent cytokine production and degranulation. Fc gamma RIIIA/CD16a is crucial in generating memory-like adaptive NK cells that efficiently eliminate virus-infected cells via ADCC. It regulates NK cell survival, proliferation, and prevents NK cell progenitor apoptosis. As an Fc-binding subunit, it associates with CD247 and/or FCER1G adapters to form functional signaling complexes, leading to intracellular signaling cascades that drive NK cell activation. The protein also plays a role in mediating the antitumor activities of therapeutic antibodies, triggering TNFA-dependent ADCC of IgG-coated tumor cells and enhancing ADCC in response to afucosylated IgGs. In the context of Dengue virus infection, Fc gamma RIIIA/CD16a is involved in pathogenesis through an antibody-dependent enhancement (ADE) mechanism, facilitating virus entry into myeloid cells and subsequent viral replication during secondary infections.

Loaded Anti-Human CD1 6a Antibody on 96-Flat plate, can bind Human CD16a, with an affinity constant of 12 nM as determined in BLI assay (Gator Prime).

Human

HEK293

C-10*His;C-HSA

P08637 (G17-Q208, F176V)

2214  [NCBI]

90-115 kDa

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

Lyophilized powder

Lyophilized a 0.22 μm filtered solution of 20 mM Tris-HCl, 0.5 M NaCl, 6% Trehalose, pH 8.0.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

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.