SILu™Prot PTX3 Pentraxin-related protein PTX3 human
SIGMA/MSST0003 - recombinant, expressed in HEK 293 cells, SIL MS Protein Standard, 13C- and 15N-labeled
Synonym: SILu™ Prot Pentraxin-related protein
Product Type: Chemical
SILuProt products are stable isotope-labeled full length proteins designed to be used as mass spectrometry internal standards for quantitative proteomics. Introduction of an internal SILuProt standard at the beginning of the MS workflow minimizes variations in quantification due to protein extraction, fractionation, enrichment, proteolysis and analysis
Incorporation of stable isotopelabeled amino acids 13C615N4Arg and 13C615N2Lys for representative peptides from SILuProt PTX3 was >98%. (Chart 1)
Incorporation of stable isotopelabeled amino acids 13C615N4Arg and 13C615N2Lys for representative peptides from SILuProt PTX3 was >98%. (Chart 2)
Incorporation of stable isotopelabeled amino acids 13C615N4Arg and 13C615N2Lys for representative peptides from SILuProt PTX3 was >98%. (Chart 3)
| assay | ≥98% (SDS-PAGE) |
| biological source | human |
| form | lyophilized powder |
| Quality Level | 200  |
| recombinant | expressed in HEK 293 cells |
| storage temp. | −20°C |
| tag | His tagged |
| V5 tagged | |
| technique(s) | mass spectrometry (MS): suitable |
| UniProt accession no. | P26022  |
| Biochem/physiol Actions: | Pentraxin 3 (PTX3) is a secreted glycosylated protein belonging to the pentraxin superfamily1. PTX3 is rapidly produced and released by several cell types, in particular by mononuclear phagocytes, dendritic cells (DCs), fibroblasts and endothelial cells in response to primary inflammatory signals (e.g., toll-like receptor [TLR]engagement, TNFα, IL-1β)1. PTX3 behaves as an acute phase response protein, as the blood levels of PTX3, low in normal conditions (about 25 ng/mL in the mouse, < 2 ng/mL in humans), increase rapidly (peaking at 6–8 h after induction)and dramatically (200–800 ng/mL)during endotoxic shock, sepsis and other inflammatory and infectious conditions, correlating with the severity of the disease. Under these conditions, PTX3 is a rapid marker for primary local activation of innate immunity and inflammation2-6. anti-apoptotic cell survival2, cell cycle regulation3, cell adhesion4, tissue remodeling5 and lipid transportation6. PTX3 gene expression in human endothelial cells is suppressed to a greater extent by pitavastatin than the expression of 6,000 other human genes that have been examined, suggesting that PTX3 may be a novel biomarker for inflammatory cardiovascular disease8. |
| General description: | SILu™ Prot PTX3 is a recombinant, stable isotope-labeled human PTX3 which incorporates [13C6, 15N4]-Arginine and [13C6, 15N2]-Lysine. Expressed in human 293 cells, it is designed to be used as an internal standard for bioanalysis of PTX3 in mass-spectrometry. SILu™ Prot PTX3 is a recombinant glycosylated human protein expressed in human 293 cells. It is a homooctamer and a homodecamer consisting of 364 amino acids (monomer) with a calculated molecular weight of 40 kDa. It contains no tags. |
| Legal Information: | SILu is a trademark of Sigma-Aldrich Co. LLC |
| Legal Information: | This product is licensed under U.S. Patent No. 7,396,688 and foreign counterparts from E. I. du Pont de Nemours and Company. The purchase of this product conveys to the buyer the nontransferable right to use the purchased amount of the product for research and development only, including services for a third party for consideration. The buyer cannot sell or otherwise transfer this product, its components or materials made using this product or its components to a third party. Information about licenses for excluded uses is available from: E. I. du Pont de Nemours and Company; Attn: Associate Director, Commercial Development; DuPont Experimental Station E268; 200 Powdermill Rd.; Wilmington, DE 19803; 1-877-881-9787 (voice), 1-302-695-1437 (fax), licensing@dupont.com. |
| Other Notes: | ENSDDYDLMYVNLDNEIDNGLHPTE |
| Physical form: | Supplied as a lyophilized powder containing phosphate buffered saline |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥98% (SDS-PAGE) |
| Storage Temp. | −20°C |
| UNSPSC | 23201100 |