Product Specifications for Recombinant Human TSG-6 Protein, CF
Mouse myeloma cell line, NS0-derived human TSG-6 protein Trp18-Leu277, with a C-terminal 10-His tag
>90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
40 kDa, reducing conditions
Measured by its binding ability in a functional ELISA. When Recombinant Human TSG-6 is present at 0.5 μg/well, the concentration of biotinylated hyaluronan that produces 50% of the optimal binding response is found to be approximately 4-30 ng/mL.
Scientific Data Examples for Recombinant Human TSG-6 Protein, CF
Recombinant Human TSG-6 Protein Binding Activity
Recombinant Human TSG-6 (Catalog # 2104-TS) binds hyaluronan in a functional ELISA. When Recombinant Human TSG-6 is present at 0.5 µg/mL, the concentration of biotinylated hyaluronan that produces 50% of the optimal binding response is approximately 4-30 ng/mL.
Recombinant Human TSG-6 Protein SDS-PAGE
1 μg/lane of Recombinant Human TSG-6 was resolved with SDS-PAGE under reducing (R) conditions and visualized by silver staining, showing a single band at 40 kDa.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
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.
What formulation is right for me?
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
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 100 μg/mL in sterile PBS.
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
TSG-6 (TNF-stimulated gene 6; also TNFIP6) is a secreted, 35-39 kDa group A member of the LINK‑Module superfamily of proteins (1 - 4). Human TSG‑6 is synthesized as a 277 amino acid (aa) precursor. It contains a 17 aa signal sequence and a 260 aa mature region (5, 6). The mature region shows an N-terminal LINK module (aa 36-129) and a C-terminal CUB (C1s/C1r; urchin embryonic growth factor; BMP1) domain (aa 135-247). Link modules are alpha -helical, beta -sheet structures that bind hyaluronan (HA) and participate in extracellular matrix (ECM) assembly (7). Mature human TSG-6 shares 94% aa identity with both mouse and canine TSG-6. Cells reported to express TSG-6 include activated fibroblasts, synoviocytes, chondrocytes, neutrophils, proximal tubular epithelium, bronchial epithelium, endothelium, and visceral, plus vascular smooth muscle (2, 8). TSG-6 has multiple functions, many of which involve the ECM. It is suggested to stabilize HA-rich ECM. It does so by serving as an intermediary, or link, between the individual subunits of extracellular decameric pentraxin 3 and the surrounding hyaluronan matrix (9). It also provides structure and organization to hyaluronan. This is accomplished by a TSG-6 mediated transfer of an 80-85 kDa HC subunit from I alpha I (inter-alpha -inhibitor) to HA. I alpha I is a four-component, 225 kDa serine protease inhibitor. It contains a protease inhibitor subunit (bikunin), two independent, accompaning protein chains (HC1 and HC2), and a short chondroitin sulfate linking moiety. TSG-6 is a cation‑dependent catalyst for the removal, transfer, and subsequent covalent linkage of HC 1/2 to surrounding HA. This provides substance and reinforcement to the ECM (1, 2, 10, 11, 12). The disassembly of I alpha I also leads to free bikunin, which in the “free” state becomes a potent inhibitor of serine proteases (8).
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Milner, C.M. and A.J. Day (2003) J. Cell Sci. 116:1863.
Wisnieewski, H-G. and J. Vilcek (2004) Cytokine Growth Factor Rev. 15:129.
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Tumor Necrosis Factor-stimulated Gene Sequence 6
Entrez Gene IDs
7130 (Human); 21930 (Mouse)
Hyaluronate-binding protein, TNF alpha-induced protein 6, TNF-stimulated gene 6 protein, TNFAIP6, TSG-6, TSG-6tumor necrosis factor alpha-inducible protein 6, TSG6, TSG6tumor necrosis factor-inducible gene 6 protein, Tumor necrosis factor alpha-induced protein 6, tumor necrosis factor, alpha-induced protein 6, tumor necrosis factor-stimulated gene-6 protein
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