Curcumin is a hydrophobic polyphenol and major bioactive component of turmeric with known anti-inflammatory, neurogenesis, antioxidant, and anti-carcinogenic effect. Curcumin antagonizes many steps in the inflammatory cascade, including Inhibition of NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells), activator protein-1 transcription and iNOS (induced Nitric oxide syn...

background: psoriasis is a chronic and inflammatory dermatologic disease. inflammatory biomarkers such as c-reactive protein (crp) and erythrocyte sedimentation rate (esr) are known as immediate and delayed inflammatory biomarkers, respectively. due to the fact that anti-inflammatory drugs such as infliximab are widely used in psoriasis treatment, the aim of this study was to evaluate esr, crp ...

Fluorescence quenching is used to gain information on the exposure of tryptophan residues to lipid in membrane-bound proteins and peptides. A protocol is developed to calculate this exposure, based on a comparison of quenching efficiency and of a fluorescence lifetime (or quantum yield) measured for a protein and for a model tryptophan-containing compound. Various methods of analysis of depth-d...

Beta-barrel membrane proteins in Gram-negative bacteria, mitochondria, and chloroplasts are assembled by highly conserved multi-protein complexes. The mechanism by which these molecular machines fold and insert their substrates is poorly understood. It has not been possible to dissect the folding and insertion pathway because the process has not been reproduced in a biochemical system. We purif...

Steady-state and time-resolved fluorescence measurements on each of five native tryptophan residues in full-length and truncated variants of E. coli outer-membrane protein A (OmpA) have been made in folded and denatured states. Tryptophan singlet excited-state lifetimes are multiexponential and vary among the residues. In addition, substantial increases in excited-state lifetimes accompany OmpA...