Recombinant Mouse TDO2 His-tag Protein, CF

Catalog # Availability Size / Price Qty
10001-TD-020
TDO2 Protein Enzyme Activity
2 Images
Product Details
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Recombinant Mouse TDO2 His-tag Protein, CF Summary

Purity
>90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to oxidize L-tryptophan to N-formyl-kynurenine. The specific activity is >500 pmol/min/μg, as measured under the described conditions.
Source
E. coli-derived mouse TDO2 protein
Val18-Phe388
with a C terminal 6-His tag
Accession #
N-terminal Sequence
Analysis
Val18
Predicted Molecular Mass
45 kDa
SDS-PAGE
39 & 75 kDa, reducing conditions

Product Datasheets

Data Images

Enzyme Activity TDO2 Protein Enzyme Activity View Larger

Recombinant Mouse TDO2 (Catalog # 10001-TD) is measured by its ability to oxidize L-tryptophan to N-formyl-kynurenine.

SDS-PAGE TDO2 Protein Enzyme Activity View Larger

1 μg/lane of Recombinant Mouse TDO2 was resolved with SDS-PAGE underreducing (R) and non-reducing (NR) conditions and visualized by silver staining,showing bands at 39 kDa and 75 kDa under R conditions.

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Background: TDO2

Tryptophan 2,3-dioxygenase (TDO2), a heme-containing cytosolic dioxygenase, forms a homo-tetrameric active molecule of approximately 190 kDa composed of 48 kDa monomers (1, 2). Mouse TDO2 shares 89% aa sequence identity with human TDO2. TDO2 is one of three proteins capable of catalyzing the first and rate-limiting step of the L-kynurenine pathway (KP): oxidative cleavage of the essential amino acid L-tryptophan to form N formyl kynurenine (3). TDO2 is a cytosolic protein typically localized to the liver and brain, unlike the more ubiquitously expressed indoleamine 2,3-dioxygenase (IDO), yet it is responsible for ~90% of the primary route of catabolism of tryptophan through the KP (3). TDO2 is upregulated in extrahepatic tumors (4-6) and is consequently a target in cancer immunotherapy (7). TDO2 is a therapeutic target in brain disease such as schizophrenia, Alzheimers disease, multiple sclerosis and glioma (8-11) due to its role in the regulation of levels of critical biologically active downstream KP metabolites (3). Polymorphisms in the TDO2 gene have been implicated for a role in behavioural responses and autism (12,13).

References
  1. Lewis-Ballester, A. et al. (2016) Sci. Rep. 6:35169.
  2. Rafice, S.A. et al. (2009) Biochem. Soc. Trans. 37:408.
  3. Badawy, A. (2017) Int J. Tryptophan Res. 10:1.
  4. Pilotte, L. et al. (2012) Proc. Natl. Acad. Sci. U.S.A. 109:2497.
  5. D'Amato, N.C. et al. (2015) Cancer Res. 75:4651.
  6. Yu, C.P et al. (2017) Med. Oncol. 34:73.
  7. Platten, et al. (2015) Front. Immunol. 5:673.
  8. Breda, C. et al. (2016) Proc. Natl. Acad. Sci. U.S.A. 113:5435
  9. Yu, C.P. et al. (2016) Metab. Brain Dis. 31:737.
  10. Lanz. T.V. et al. (2017) Sci. Rep. 7:41271.
  11. Reus, G.Z. et al. (2018) Prog. Neuropsychopharmacol. Biol. Psychiatry 81:55.
  12. Soichot, M. et al. (2013) Alcohol Alcohol 48:415.
  13. Nabi, R. et al. (2004) Am. J. Med. Genet. B. Neuropsychiatr. Genet. 125B:63.
Long Name
Tryptophan 2,3-dioxygenase
Entrez Gene IDs
6999 (Human); 56720 (Mouse); 64206 (Rat)
Alternate Names
chky; TDO; TDO2; TDOTO; TO; TPH2EC 1.13.11.11; TRPO; TRPOtryptophanase; Tryptamin 2,3-dioxygenase; tryptophan 2,3-dioxygenase; Tryptophan Oxygenase; Tryptophan Pyrrolase; Tryptophanase

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