Recombinant Human ITIH5 His-tag Protein, CF Summary
Ser17-Leu942 with a C-terminal 6-His tag
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Supplied as a 0.2 μm filtered solution in Tris and NaCl.|
|Shipping||The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
When Recombinant Human ITIH5 His-tag Protein (Catalog # 11009-IT) is coated at 2.00 μg/mL (100 μL/well), it binds to Recombinant Human TSG-6 (2104-TS). The ED50 for this binding is 1.00‑10.0 μg/mL.
2 μg/lane of Recombinant Human ITIH5 His-tag Protein (Catalog # 11009-IT) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 110‑122 kDa.
Inter-alpha-trypsin inhibitor heavy chain 5 (ITIH5) is a heavy chain (HC) member of the ITIH family with predominant expression in the placenta, mammary gland, and ovary (1). It is composed of an N-terminal signal sequence, vault protein inter‑alpha‑trypsin domain (VIT), von-Willebrand type A domain, C-terminal cleavage site and multicopper oxidase domain conserved within other HCs in the family (1). The cleavage site present in ITIH members is processed during chain assembly (1) to reveal a C-terminal aspartic acid residue that enables crosslinking of the HC directly to chondroitin sulfate (CS) and hence to bikunin (2, 3). ITIHs can alternatively be associated with hyaluronan (HA) to form a Serum-derived hyaluronan associated protein (SHAP)-hyaluronan (HA) complex known to assist in stabilizing HA-rich extracellular matrices in inflammatory processes (3, 4). ITIH5 has been reported to modulate inflammation in skin disease and obesity and was suggested to play an important role more broadly in inflammation through its interaction with HA (5, 6). Tumor necrosis factor-stimulated gene 6 (TSG-6)-mediates interactions with the ITIH5 to enable the transfer of HC to HA matrix by forming a TSG-6:HC complex (7,8) that can facilitate Tumor Growth Factor beta 1 (TGF beta 1)‑dependent myofibroblast differentiation (9). ITIH5 has also been reported as downregulated or epigenetically silenced in several invasive cancers with poor prognosis including lung adenocarcinoma, breast cancer, gastric cancer, bladder cancer, and melanoma highlighting its potential as a therapeutic target (1, 10‑12).
- Himmelfarb, M. et al. (2004) Cancer Lett. 204:69.
- Salier, J.P. et al. (1996) Biochem. J. 315:1.
- Zhuo, L. et al. (2004) J. Biol. Chem. 279:38079.
- Rugg, M.S. et al. (2005) J. Biol. Chem. 280:25674.
- Anveden, A. et al. (2012) Obesity 20:708.
- Huth, S. et al. (2020) Skin Pharmacol. Physiol. 33:198.
- Zhuo, L. et al. (2006) J. Biol. Chem. 281:20303.
- Baranova, N.S. et al. (2013) J. Biol. Chem. 288:29642.
- Martin, J. et al. (2016) J. Biol. Chem. 291:13789.
- Mai, C. et al. (2014) Med. Oncol. 31:53.
- Dotsch, M. et al. (2015) Epigenetics. 10:903.
- Rose, M. et al. (2017) Mol. Cancer 16:44.
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