Tryptophan 2,3-dioxygenase (EC 1.13.11.11; UniProt P48775; also known as TDO, TO, TRPO, Tryptamin 2,3-dioxygenase, Tryptophan oxygenase, Tryptophan pyrrolase, Tryptophanase) is encoded by the TDO2 (also known as TDO) gene (Gene ID 6999) in human. TDO2 is a cytosolic heme-containing enzyme that exists as a homotetramer, where the N terminal residues of each monomer form part of the substrate binding site in an adjacent monomer. Tryptophan 2,3-dioxygenase (TDO2) catalyzes the first step of the kynurenine pathway, namely the conversion of tryptophan to kynurenine (Kyn), which can also be catalyzed by indoleamine 2,3-dioxygenase 1 (IDO1) or IDO2. IDO1 is expressed in tissues throughout the body, while TDO2 is predominantly expressed in the liver. Altered tryptophan metabolism and increased secretion of tryptophan metabolites are found in solid tumors, including in breast cancer. TDO2-mediated Kyn production in triple-negative breast cancer (TNBC) cells is reported to activate aryl hydrocarbon receptor (AhR), an endogenous kynurenine receptor. Inhibiting TDO2 or AhR via pharmacologic or genetic means is reported to result in increased sensitivity to anoikis, as well as decreased proliferation, migration, and invasion of TNBC cells.
Specificity
Clone 7A6.1 targets an internal epitope of human and murine TDO2 (TDO).
Immunogen
GST-tagged recombinant human TDO2 internal fragment.
Application
Anti-TDO2, clone 7A6.1, Cat. No. MABN1537, is a highly specific mouse monoclonal antibody that targets TDO2, validated for use in Immunohistochemistry (Paraffin) and Western Blotting.
Immunohistochemistry Analysis: A 1:50 dilution from a representative lot detected TDO2 in human kidney, liver, and small intestine tissue sections.
Quality
Evaluated by Western Blotting in mouse liver tissue lysate.
Western Blotting Analysis: A 1:500 dilution of this antibody detected TDO2 in 10 µg of mouse liver tissue lysate.
Concentration: Please refer to lot specific datasheet.
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Storage Class
12 - Non Combustible Liquids
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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International journal of tryptophan research : IJTR, 15, 11786469221138456-11786469221138456 (2022-12-06)
Kynurenine (Kyn), a metabolite of tryptophan (Trp), is a key regulator of mammal immune responses such as cancer immune tolerance. Indoleamine-2,3-dioxygenase (IDO) and tryptophan-2,3-dioxygenase (TDO) are main enzymes regulating the first and rate-limiting step of the Kyn pathway. To identify
The partial loss of liver due to liver transplantation or acute liver failure induces rapid liver regeneration. Recently, we reported that the selective inhibition of indoleamine 2,3‑dioxygenase (Ido) 1 promotes early liver regeneration. However, the role of Ido2 in liver
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