FUNCTION: Catalyzes the first and rate limiting step of the catabolism of the essential amino acid tryptophan along the kynurenine pathway (PubMed:17671174). Involved in the peripheral immune tolerance, contributing to maintain homeostasis by preventing autoimmunity or immunopathology that would res...
FUNCTION: Catalyzes the first and rate limiting step of the catabolism of the essential amino acid tryptophan along the kynurenine pathway (PubMed:17671174). Involved in the peripheral immune tolerance, contributing to maintain homeostasis by preventing autoimmunity or immunopathology that would result from uncontrolled and overreacting immune responses (PubMed:25691885). Tryptophan shortage inhibits T lymphocytes division and accumulation of tryptophan catabolites induces T-cell apoptosis and differentiation of regulatory T-cells (PubMed:25691885). Acts as a suppressor of anti-tumor immunity (PubMed:23103127, PubMed:25157255, PubMed:14502282, PubMed:25691885). Limits the growth of intracellular pathogens by depriving tryptophan (PubMed:25691885). Protects the fetus from maternal immune rejection (PubMed:25691885). {ECO:0000269|PubMed:14502282, ECO:0000269|PubMed:17671174, ECO:0000303|PubMed:23103127, ECO:0000303|PubMed:25157255, ECO:0000303|PubMed:25691885}.
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GO - Biological processes (BP):
'de novo' NAD biosynthetic process from tryptophan [GO:0034354]; female pregnancy [GO:0007565]; immune system process [GO:0002376]; inflammatory response [GO:0006954]; kynurenic acid biosynthetic process [GO:0034276]; multicellular organismal response to stress [GO:0033555]; negative regulation of i...
'de novo' NAD biosynthetic process from tryptophan [GO:0034354]; female pregnancy [GO:0007565]; immune system process [GO:0002376]; inflammatory response [GO:0006954]; kynurenic acid biosynthetic process [GO:0034276]; multicellular organismal response to stress [GO:0033555]; negative regulation of interleukin-10 production [GO:0032693]; negative regulation of T cell apoptotic process [GO:0070233]; negative regulation of T cell proliferation [GO:0042130]; positive regulation of chronic inflammatory response [GO:0002678]; positive regulation of interleukin-12 production [GO:0032735]; positive regulation of T cell apoptotic process [GO:0070234]; positive regulation of T cell tolerance induction [GO:0002666]; positive regulation of type 2 immune response [GO:0002830]; response to lipopolysaccharide [GO:0032496]; swimming behavior [GO:0036269]; tryptophan catabolic process [GO:0006569]; tryptophan catabolic process to kynurenine [GO:0019441]
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GO - Molecular function (MF):
electron transfer activity [GO:0009055]; heme binding [GO:0020037]; indoleamine 2,3-dioxygenase activity [GO:0033754]; metal ion binding [GO:0046872]; tryptophan 2,3-dioxygenase activity [GO:0004833]...
electron transfer activity [GO:0009055]; heme binding [GO:0020037]; indoleamine 2,3-dioxygenase activity [GO:0033754]; metal ion binding [GO:0046872]; tryptophan 2,3-dioxygenase activity [GO:0004833]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; cytosol [GO:0005829]; smooth muscle contractile fiber [GO:0030485]; stereocilium bundle [GO:0032421]...
cytoplasm [GO:0005737]; cytosol [GO:0005829]; smooth muscle contractile fiber [GO:0030485]; stereocilium bundle [GO:0032421]
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