Cytokine that can act as a growth factor for activated T and NK cells, enhance the lytic activity of NK/lymphokine- activated killer cells, and stimulate the production of IFN-gamma by resting PBMC. Defects in IL12B 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. Genetic variations in IL12B are a cause of susceptibility to psoriasis type 11 (PSORS11). Psoriasis is a common, chronic inflammatory disease of the skin with multifactorial etiology. It is characterized by red, scaly plaques usually found on the scalp, elbows and knees. These lesions are caused by abnormal keratinocyte proliferation and infiltration of inflammatory cells into the dermis and epidermis. Belongs to the type I cytokine receptor family. Type 3 subfamily. Note: This description may include information from UniProtKB.
Protein type: Cytokine; Secreted, signal peptide; Secreted
Chromosomal Location of Human Ortholog: 5q31.1-q33.1
Molecular Function: identical protein binding; hematopoietin/interferon-class (D200-domain) cytokine receptor activity; interleukin-12 alpha subunit binding; protein binding; protein homodimerization activity; growth factor activity; protein heterodimerization activity; cytokine activity; interleukin-23 receptor binding; interleukin-12 receptor binding
Biological Process: positive regulation of granulocyte macrophage colony-stimulating factor production; positive regulation of cell adhesion; negative regulation of interleukin-10 production; positive regulation of T-helper 1 type immune response; positive regulation of interleukin-12 production; positive regulation of osteoclast differentiation; negative regulation of smooth muscle cell proliferation; positive regulation of T cell mediated cytotoxicity; positive regulation of NK T cell proliferation; natural killer cell activation; positive regulation of tyrosine phosphorylation of Stat4 protein; positive regulation of NF-kappaB import into nucleus; sensory perception of pain; positive regulation of activated T cell proliferation; defense response to Gram-negative bacterium; positive regulation of natural killer cell activation; positive regulation of interleukin-10 production; positive regulation of tyrosine phosphorylation of Stat3 protein; positive regulation of lymphocyte proliferation; natural killer cell activation during immune response; negative regulation of inflammatory response to antigenic stimulus; positive regulation of T cell proliferation; cell cycle arrest; defense response to virus; regulation of cytokine biosynthetic process; positive regulation of memory T cell differentiation; positive regulation of interleukin-17 production; positive regulation of natural killer cell proliferation; positive regulation of NK T cell activation; T-helper 1 type immune response; cell migration; positive regulation of natural killer cell mediated cytotoxicity directed against tumor cell target; T-helper cell differentiation; cytokine and chemokine mediated signaling pathway; positive regulation of tumor necrosis factor production; defense response to protozoan; regulation of tyrosine phosphorylation of Stat1 protein; response to UV-B; positive regulation of tissue remodeling; positive regulation of interferon-gamma production; negative regulation of interleukin-17 production; positive regulation of tyrosine phosphorylation of Stat5 protein; positive regulation of mononuclear cell proliferation; sexual reproduction; interferon-gamma biosynthetic process; positive regulation of defense response to virus by host; positive regulation of interferon-gamma biosynthetic process; positive regulation of inflammatory response
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.