IDO2 Protein (His Tag)

Indoleamine 2,3-dioxygenase 2 Protein Datasheet

IDO2 Protein Product Information

• Synonym: INDOL1
• Protein Construction: A DNA sequence encoding the mature form of human IDO2 (Q6ZQW0-1) (Met 1-Gly 407) was fused with a polyhistidine tag at the C-terminus.
• Source: Human
• Expression Host: E.coli

IDO2 Protein QC Testing

• Purity: > 93 % as determined by SDS-PAGE
• Endotoxin: Please contact us for more information.
• Stability: Samples are stable for up to twelve months from date of receipt at -70℃
• Predicted N terminal: Met 1
• Molecular Mass: The recombinant human IDO2 comprises 413 amino acids and has a calculated molecular mass of 46.2 KDa. It migrates as an approximately 43 kDa band in SDS-PAGE under reducing conditions.
• Formulation: Lyophilized from sterile PBS, 20%glycerol; pH7.5.
  1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
  2. Please contact us for any concerns or special requirements.
• SDS-PAGE: IDO2 protein

IDO2 Protein Usage Guide

• Storage: Store it under sterile conditions at -70℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

IDO2 Protein Description

IDO2 is a member of the indoleamine 2,3-dioxygenase family. Indoleamine-2,3-Dioxygenase (IDO) is an immunosuppressive molecule inducible in various cells. IDO2 is a new variant of classic IDO (IDO1). It can be detected in liver, small intestine, spleen, placenta, thymus, lung, brain, kidney, and colon. IDO is a haem-containing enzyme of about 400 amino acids. Site-directed mutagenesis showed His346 to be essential for haem binding, indicating that this histidine residue may be the proximal ligand. The degradative action of IDO on tryptophan leads to cell death by starvation of this essential and relatively scarce amino acid. IDO2 may actually be the ancestor of the better characterized IDO1 gene, and that IDO1 might have been generated by gene duplication of IDO2 before the origin of tetrapods in mammalian evolutionary history. It catalyzes the first and rate-limiting step in the kynurenine pathway of tryptophan catabolism.

References

1. Witkiewicz AK. et al., 2009, J Am Coll Surg. 208 (5): 781-7.
2. S?rensen RB. et al., 2011, Cancer Res. 71 (6): 2038-44.
3. Witkiewicz AK. et al., 2009, J Am Coll Surg. 208 (5): 781-7.