Interferon gamma receptor complex (consisting of interferon gamma receptor 1 and interferon gamma receptor 2) (IFNGR complex (components abbreviated as IFNGR1 and IFNGR2))

The interferon gamma receptor complex consists of two subunits, interferon gamma receptor 1 and interferon gamma receptor 2, that together bind interferon gamma (IFN-γ), the only member of type II interferons. Binding of IFN-γ to this receptor activates the JAK1 (associated with IFNGR1) and JAK2 (associated with IFNGR2) kinases, leading to phosphorylation of STAT1 proteins. Activated STAT1 translocates to the nucleus and stimulates transcription of genes critical for immune and inflammatory responses, including major histocompatibility complex molecules. The receptor's function is essential for antimicrobial immunity, tumor surveillance, macrophage activation, B cell function, and T cell differentiation. Disruption by mutation in either subunit can cause inherited immunodeficiencies, and engineered biased agonists offer prospects for tuning immune responses in cancer therapy.

Other names

IFNγ receptor complexType II interferon receptor complexInterferon-gamma receptor complexIFNGR

Ligand (IFN-γ) binding induces dimerization of IFNGR1, recruitment of IFNGR2, and activation of the JAK-STAT signaling cascade, leading to phosphorylation of STAT1 and transcription of interferon-stimulated genes for immune effector function