IFNGR2: Part of the receptor for interferon gamma. Required for signal transduction. This accessory factor is an integral part of the IFN-gamma signal transduction pathway and is likely to interact with GAF, JAK1, and/or JAK2. Defects in IFNGR2 are a cause of mendelian susceptibility to mycobacterial disease (MSMD); also known as familial disseminated atypical mycobacterial infection. This rare condition confers predisposition to illness caused by moderately virulent mycobacterial species, such as Bacillus Calmette-Guerin (BCG) vaccine and environmental non-tuberculous mycobacteria, and by the more virulent Mycobacterium tuberculosis. Other microorganisms rarely cause severe clinical disease in individuals with susceptibility to mycobacterial infections, with the exception of Salmonella which infects less than 50% of these individuals. The pathogenic mechanism underlying MSMD is the impairment of interferon-gamma mediated immunity, whose severity determines the clinical outcome. Some patients die of overwhelming mycobacterial disease with lepromatous-like lesions in early childhood, whereas others develop, later in life, disseminated but curable infections with tuberculoid granulomas. MSMD is a genetically heterogeneous disease with autosomal recessive, autosomal dominant or X-linked inheritance. Belongs to the type II cytokine receptor family.
Protein type: Membrane protein, integral
Chromosomal Location of Human Ortholog: 21q22.11
Cellular Component: endoplasmic reticulum; integral to plasma membrane; plasma membrane; integral to membrane
Molecular Function: hematopoietin/interferon-class (D200-domain) cytokine receptor activity; interferon-gamma receptor activity
Biological Process: cell surface receptor linked signal transduction; response to virus; cytokine and chemokine mediated signaling pathway
Disease: Immunodeficiency 28
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