Product Specifications for Recombinant Mouse TSG-6 Protein, CF
Mouse myeloma cell line, NS0-derived mouse TSG-6 protein Trp18-Leu275, with a C-terminal 6-His tag
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
<1.0 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
39 kDa, reducing conditions
Measured by its binding ability in a functional ELISA. Immobilized rmTSG-6 can bind biotinylated Hyaluronan with an estimated KD <1 nM.
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 at ambient temperature. 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 named TNFIP6) is a secreted, 35 - 39 kDa group A member of the LINK-Module superfamily of proteins (1 - 4). Mouse TSG-6 is synthesized as a 275 amino acid (aa) precursor. It contains a 17 aa signal sequence and a 258 aa mature region (5, 6). The mature region has an N-terminal link module (aa 36 - 129) and a C-terminal CUB (C1s/C1r; urchin embryonic growth factor; BMP1) domain (aa 135 - 246). Link modules bind hyaluronan (HA) and participate in extracellular matrix (ECM) assembly (7). Mature mouse TSG-6 shares 97%, 94% and 94% aa identity with rat, human and canine TSG-6, respectively. Cells reported to express TGF-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 as a link between the individual subunits of the 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 protein 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 catalyst for the removal and transient binding of either HC chain. Each chain is subsequently transferred and covalently-linked to the surrounding HA. This provides substance and reinforcement to the ECM (1, 2, 10, 11, 12). This 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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Kohda, D. et al. (1996) Cell 86:767.
Forteza, R. et al. (2007) Am. J. Respir. Cell Mol. Biol. 36:20.
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Sanggaard, K.W. et al. (2005) J. Biol. Chem. 280:11936.
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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