Recombinant Human Pentraxin 3/TSG-14 His-tag Protein, CF

Name: Recombinant Human Pentraxin 3/TSG-14 His-tag Protein, CF
Brand: R&D Systems
SKU: 10292-TS

Catalog # 10292-TS

Product Datasheet / COA / SDS

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Key Product Details

Source:	CHO
Accession #:	P26022
Structure / Form:	Multimer consisting of as many as ten non-covalently and covalently linked subunits.
Applications:	Bioactivity

View Full Technical Details for Recombinant Human Pentraxin 3/TSG-14 His-tag Protein, CF

Product Specifications

Source	Chinese Hamster Ovary cell line, CHO-derived human Pentraxin 3/TSG-14 protein Glu18-Ser381, with a C-terminal 6-His tag
Purity	>95%, 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.
N-terminal sequence Analysis	Glu18
Predicted Molecular Mass	41 kDa
SDS-PAGE	38-55 kDa, under reducing conditions
Activity	Measured by its binding ability in a functional ELISA. When Human C1q is immobilized at 5 µg/mL (100 µL/well), Recombinant Human Pentraxin 3/TSF-14 His-tag (Catalog # 10292-TS) binds with an ED₅₀ of 0.5-4 μg/mL.

Recombinant Human Pentraxin 3/TSG-14 His-tag Protein, CF Scientific Data Examples

	Recombinant Human Pentraxin 3/TSG-14 His-tag Protein Binding Activity When Human C1q is immobilized at 5 μg/mL (100 μL/well), Recombinant Human Pentraxin 3/TSG-14 His-tag (Catalog # 10292-TS) binds with an ED₅₀ of 0.5-4 μg/mL.
	Recombinant Human Pentraxin 3/TSG-14 His-tag Protein SDS-PAGE 2 μg/lane of Recombinant Human Pentraxin 3/TSG-14 His-tag (Catalog # 10292-TS) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 38-55 kDa under reducing condition.

Formulation, Preparation and Storage

Carrier Free

What does CF mean?

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.

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 could interfere.

10292-TS

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution	Reconstitute at 500 μg/mL in PBS.
Shipping	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.

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: Pentraxin 3/TSG-14

Pentraxin 3 (PTX3), TSG-14, was initially identified as a TNF-alpha or IL-1 beta inducible gene (1-3). It belongs to the pentraxin family, which was named originally for the homo-pentameric structure formed by its members (4). The pentraxin family is divided into two subfamilies: the “short” and the “long” pentraxins with approximate molecular weights of 25 kDa and 50 kDa, respectively. TSG-14 is a member of the long pentraxin subfamily, which also includes the Xenopus laevis XL-PXN1, the guinea pig apexin/p50, the rat neuronal pentraxin I (NPI) and NPR, the human neuronal pentraxin II (NPTX2) and the human neuronal activity-related pentraxin (5). Mature secreted TSG-14 contains a pentaxin-like domain at its carboxy-terminus that shares 23-28% amino acid (aa) sequence similarity to C-reactive protein (CRP) and serum amyloid P component (SAP), which belongs to the short pentraxin subfamily. However, the N-terminal sequence of TSG-14 does not share aa sequence homology with any of the “short” pentaxins (3). Unlike CRP and SAP, which forms pentamers only, TSG-14 forms both pentameric and higher ordered oligomers (5). Similarly to CRP and SAP, TSG-14 binds to the complement cascade component C1q (6). However, TSG-14 does not bind to phosphoethanolamine, phosphocholine, or high pyruvate agarose, which are known ligands for CRP and SAP. TSG-14 is a marker of the acute phase response and is highly expressed in advanced atherosclerotic plaques (12). While CRP and SAP are primarily produced in the liver, TSG-14 expression is strongly upregulated by TNF-alpha, IL-1 beta, and bacterial LPS in peripheral fibroblasts, endothelial cells, and macrophages (7). At the amino acid level, human and mouse TSG-14 share 88% aa sequence homology (8). TSG-14 concentration is elevated in the joint fluid of patients with rheumatoid arthritis (RA), indicating that TSG-14 may be a potential mediator of immune response (9). TSG-14 may also function in the regulation of the uptake and clearance of apoptotic cells by dendritic cells (10). In vivo study showed that TSG-14 transgenic mice are more resistant to sepsis and endotoxemia compared to wild type during the inflammatory injury (11). Increased expression of TSG-14 may enhance the immune response to protect the host from infection.

Item	Value
References	Lee, T.H. et al. (1990) Mol. Cell. Biol. 10:1982. Breviario, F. et al. (1992) J. Biol. Chem. 267:22190. Lee, G.W. et al. (1993) J. Immunol. 150:1804. Osmand, A.P. et al. (1977) Proc. Natl. Acad. Sci. USA 74:739. Goodman A.R. et al. (1996) Cytokine & Growth Factor Reviews 7:191. Bottazzi, B. et al. (1997) J. Biol. Chem. 272:32817. Introna, M. et al. (1996) Blood 87:1862. Altmeyer, A. et al. (1995) J. Biol. Chem. 270:25584. Luchetti, M.M. et al. (2000) Clin. Exp. Immunol. 119:196. Rovere, P. et al. (2000) Blood 96:4300. Dias, A.A.M. et al. (2001) J. Leukocyte Biol. 69:928. Rolph, M.S. et al. (2002) Arterioscler. Throm. Vasc. Biol. 22:e10-4.
Long Name	Tumor Necrosis Factor Stimulated Gene 14
Entrez Gene IDs	5806 (Human); 19288 (Mouse)
Alternate Names	PTX3, Pentaxin-related protein PTX3, Pentraxin 3, TNF alpha-induced protein 5, TNFAIP5, TSG-14, TSG-14pentaxin-related gene, rapidly induced by IL-1 beta, TSG14, Tumor necrosis factor alpha-induced protein 5, Tumor necrosis factor-inducible gene 14 protein, alpha-induced protein 5, pentaxin-related gene, rapidly induced by IL-1 beta, tumor necrosis factor, pentraxin 3, long, pentraxin-3, pentraxin-related gene, rapidly induced by IL-1 beta, pentraxin-related protein PTX3, tumor necrosis factor, alpha-induced protein 5, tumor necrosis factor-inducible protein TSG-14

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