Recombinant Mouse LBP Protein, CF

Formulations:
Catalog # Availability Size / Price Qty
6635-LP-025/CF
Product Details
Citations (2)
FAQs
Reviews

Recombinant Mouse LBP Protein, CF Summary

Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to enhance LPS-stimulated IL-8 secretion by THP‑1 human acute monocytic leukemia cells.

The ED50 for this effect is 0.5-3 ng/mL.

Source
Mouse myeloma cell line, NS0-derived mouse LBP protein
Gly25-Val481 (Ser102Arg, Tyr284His), with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Analysis
Gly25
Predicted Molecular Mass
51.5 kDa
SDS-PAGE
60-65 kDa, reducing conditions

Product Datasheets

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.

6635-LP/CF

Formulation Lyophilized from a 0.2 μm filtered solution in MES, NaCl, PEG and CHAPS.
Reconstitution Reconstitute at 100 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.

6635-LP

Formulation Lyophilized from a 0.2 μm filtered solution in MES, NaCl, PEG and CHAPS with BSA as a carrier protein.
Reconstitution Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.
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

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: LBP

LBP (Lipopolysaccharide binding protein) is a 58 ‑ 62 kDa, single-chain glycoprotein member of the BPI/LBP family, BPI/PLUNC/PSP superfamily of lipid-binding proteins (1 - 3). It is secreted by a number of mammalian cell types, including hepatocytes (4), gingival keratinocytes (5), intestinal Paneth cells (6), and type II Greater alveolar cells (7). LBP is considered to be a class 1 APR (acute phase reactant) that is induced upon exposure to both IL-1 and IL-6 (8). These two cytokines appear upon immune cell exposure to pathogenic microbes. Following its synthesis and release, LBP is known to interact with bacterial wall components, lipopolysaccharide/LPS/Lipid A from Gram- (Gm-) bacteria, and lipoteichoic acid/LTA from Gm+ bacteria (9 - 13). In the case of LPS, this interaction appears to occur both in the bacterial cell wall, and within the intercellular space, where LPS micelles naturally form following bacterial death and cell wall dissolution (14 - 17). LBP is posited to induce disassembly of LPS micelles, allowing for LPS binding to LBP, and a heparin-mediated transfer of LPS from LBP to membrane-bound CD14 on the surface of monocytes/macrophages (15, 18). This CD14:LPS complex activates a TLR4:MD2 membrane complex, resulting in the production of NO and TNF-alpha (19). TNF-alpha serves as a chemoattractant for PMNs, and an initiator of coagulation that helps to wall-off and localize microbial elements (16). Notably, increased concentrations of LBP are also associated with parasitic infections (Trypanosoma), and may contribute to the immune response towards parasites (20). In addition to the above, LBP is also reported to transfer LPS to lipoproteins, particularly HDL and LDL (19, 21 - 23). For LDL, this transfer appears to be inhibitory to monocyte activation; for HDL, the effect may be either stimulatory or inhibitory, depending upon the circumstances (19). Mouse LBP is synthesized as a 481 amino acids (aa) precursor that contains a 25 aa signal sequence and a 456 aa mature region (aa 26 - 481) (24). It contains an N‑terminal LPS binding region plus a likely C-terminal LPS transfer region (24 - 25). Mature mouse LBP shares 68% and 88% aa identity with human and rat LBP, respectively (11, 25).

References
  1. Beamer, L.J. et al. (1998) Protein Sci. 7:906.
  2. Schroder, N.W.J. & R.R. Schumann (2005) J. Endotoxin Res. 11:237.
  3. Miyake, K. (2006) J. Endotoxin Res. 12:195.
  4. Grube, B.J. et al. (1994) J. Biol. Chem. 269:8477.
  5. Ren, L. et al. (2004) J. Periodont. Res. 39:242.
  6. Hansen, G.H. et al. (2009) Histochem. Cell Biol. 131:727.
  7. Dentener, M.A. et al. (2000) Am. J. Respir. Cell Mol. Biol. 23:146.
  8. Schumann, R.R. et al. (1996) Mol. Cell. Biol. 16:3490.
  9. Weber, J.R. et. al. (2003) Immunity 19:269.
  10. Schroder, N.W.J. et al. (2004) J. Immunol. 173:2683.
  11. Su, G.L. et al. (1994) J. Immunol. 153:743.
  12. Schroder, N.W.J. et al. (2003) J. Biol. Chem. 178:15587.
  13. Wright, S.D. et al. (1989) J. Exp. Med. 170:1231.
  14. Hallatschek, W. et al. (2004) Eur. J. Immunol. 34:1441.
  15. Schumann, R.R. & E. Latz (2000) Chem. Immunol. 74:42.
  16. Mannel, D.N. & B. Echtenacher (2000) Chem. Immunol. 74:141.
  17. Tsukamoto, H. et al. (2010) Int. Immunol. 22:271.
  18. Heinzelmann, M. & H. Bosshart (2005) J. Immunol. 174:2280.
  19. Gallay, P. et al. (1993) Infect. Immun. 61:378.
  20. Ngure, R.M. et al. (2009) Res. Vet. Sci. 86:394.
  21. Levels, J.H.M. et al. (2005) Infect. Immun. 73:2321.
  22. Hubacek, J.A. et al. (1997) Biochem. Biophys. Res. Commun. 236:427.
  23. Thompson, P.A. & R.L. Kitchens (2006) J. Immunol. 177:4880.
  24. Lengacher, S. et al. (1995 - 1996) J. Inflamm. 47:165.
  25. Schumann, R.R. et al. (1990) Science 249:1429.
Long Name
Lipopolysaccharide-binding Protein
Entrez Gene IDs
3929 (Human); 16803 (Mouse)
Alternate Names
LBP; lipopolysaccharide binding protein; lipopolysaccharide-binding protein; LPS-binding protein; MGC22233

Citations for Recombinant Mouse LBP Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
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  1. NLRP3 inflammasome activation in platelets in response to sepsis
    Authors: DC Cornelius, CH Baik, OK Travis, DL White, CM Young, W Austin Pie, CA Shields, B Poudel, JM Williams
    Physiol Rep, 2019;7(9):e14073.
    Species: Rat
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Funiculosin variants and phosphorylated derivatives promote innate immune responses via the Toll-like receptor 4/myeloid differentiation factor-2 complex
    Authors: N Okamoto, K Mizote, H Honda, A Saeki, Y Watanabe, T Yamaguchi-, R Fukui, N Tanimura, Y Motoi, S Akashi-Tak, T Kato, S Fujishita, T Kimura, U Ohto, T Shimizu, T Hirokawa, K Miyake, K Fukase, Y Fujimoto, Y Nagai, K Takatsu
    J. Biol. Chem., 2017;0(0):.
    Species: Mouse
    Sample Types: Whole Cells
    Applications: Bioassay

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