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CD16 (FCGR3A) is a 50-65 kDa cell surface molecule that exists in two forms - a transmembranous form expressed by NK cells and some T cells, and a phosphatidylinositol linked form expressed by granulocytes. CD16 is a low affinity receptor for IgG (FcR III), and is an important receptor mediating ADCC by NK cells. Human CD16 is expressed in two forms – FCGR3A and FCGR3B. FCGR3A is associated with the FcepsilonRI-gamma subunit and is responsible for antibody-dependent NK cell cytotoxicity. Mast cell FCGR3A is associated, with FcepsilonRI-beta subunit. Besides IgG, FCGR3A can be triggered also by oligomeric IgE. FCGR3B is a GPI-linked monomeric receptor expressed on neutrophils and is involved in their activation and induction of a pro-adhesive phenotype. Diseases associated with CD16 dysfunction include immunodeficiency 20 and systemic lupus erythematosus.
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Protein Aliases: CD16-2; CD16a; CD16a antigen; CD16b; CD32 receptor 2; Fc fragment of IgG intermediate affinity IV receptor; Fc fragment of IgG low affinity IIIa receptor; Fc fragment of IgG, low affinity III, receptor for (CD16); Fc fragment of IgG, low affinity IIIa, receptor; Fc fragment of IgG, low affinity IIIa, receptor (CD16a); Fc fragment of IgG, low affinity IIIa, receptor for (CD16); Fc fragment of IgG, low affinity IIIa, receptor for (CD16); Fc fragment of IgG, low affinity III, receptor for (CD16); Fc fragment of IgG, low affinity IIIb, receptor (CD16b); Fc gamma receptor III; Fc gamma receptor III-A; Fc gamma receptor IIIa; Fc gamma receptor IIIb; Fc gammaRIV; Fc receptor-like 3; Fc-gamma receptor III-2 (CD 16); Fc-gamma receptor IIIb (CD 16); Fc-gamma receptor IIIb (CD16); Fc-gamma RIII; Fc-gamma RIII-alpha; Fc-gamma RIII-beta; Fc-gamma RIIIa; fc-gamma RIIIb; Fcg receptor III; FCG2; FcgammaRIII; FcgammaRIIIA; FcgammaRIV; FCGR2; FCGR2A; FCGR2B; FCGR2C; FcR-10; FcRII-b; FcRII-c; fcRIII; igG Fc receptor III; IgG Fc receptor III-1; IgG Fc receptor III-2; immunoglobulin G Fc receptor III; low affinity immunoglobulin gamma Fc region receptor III; Low affinity immunoglobulin gamma Fc region receptor III-A; Low affinity immunoglobulin gamma Fc region receptor III-B; Low affinity immunoglobulin gamma Fc region receptor IV; neutrophil-specific antigen NA; RP11-5K23.1; transmembrane receptor FcgammaRIII-X
Gene Aliases: 4833442P21Rik; CD16; CD16-2; CD16A; CD16B; FCG3; FcgammaRIV; FCGR3; FCGR3A; FCGR3B; Fcgr4; FCGRIII; FcgRIV; FCR-10; FCRIII; FCRIIIA; FCRIIIb; Fcrl3; IGFR3; IMD20
UniProt ID: (Human) P08637, (Human) O75015, (Mouse) A0A0B4J1G0
Entrez Gene ID: (Human) 2214, (Human) 2215, (Mouse) 14131, (Rat) 304966, (Mouse) 246256
Molecular Function:
cell adhesion molecule
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