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The Biophysical Interaction of the Danger-Associated Molecular Pattern (DAMP) Calreticulin with the Pattern-Associated Molecular Pattern (PAMP) Lipopolysaccharide.

Int J Mol Sci. 2019; 
Pandya UM, Egbuta C, Abdullah Norman TM, Chiang CE, Wiersma VR, Panchal RG, Bremer E, Eggleton P,, Gold LI.
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Peptide Synthesis 0 µg) and values were expressed as EU/µg Endotoxin detection kits (#88282) and (#L00350) were purchased from Pierce™ (Rockford, IL, USA) and Genscript™ (Piscataway, NJ, USA) respectively.... Endotoxin levels were determined by measuring the activity of proenzyme Factor C in the presence of a synthetic chromogenic peptide substrate that releases p-nitroaniline (pNA) after proteolysis to produce a yellow color that can be measured by reading the absorbance at 405nm (Pierce) or 545 nm (Genscript). Get A Quote

摘要

The endoplasmic reticulum (ER) chaperone protein, calreticulin (CRT), is essential for proper glycoprotein folding and maintaining cellular calcium homeostasis. During ER stress, CRT is overexpressed as part of the unfolded protein response (UPR). In addition, CRT can be released as a damage-associated molecular pattern (DAMP) molecule that may interact with pathogen-associated molecular patterns (PAMPs) during the innate immune response. One such PAMP is lipopolysaccharide (LPS), a component of the gram-negative bacterial cell wall. In this report, we show that recombinant and native human placental CRT strongly interacts with LPS in solution, solid phase, and the surface of gram-negative and gram-positive bac... More

关键词

Danger Associated Molecular Patterns (DAMPs); Pathogen Associated Molecular Patterns (PAMPs); bacterial opsonin; calreticulin; endoplasmic reticulum chaperone; innate immunity; lipopolysaccharide