Alzheimer's disease is the most fatal neurodegenerative disorder characterized by the aggregation and deposition of Amyloid β (Aβ) oligomers in the brain of patients. Two principal variants of Aβ exist in humans: Aβ1-40 and Aβ1-42. The former is the most abundant in the plaques, while the latter is the most toxic species and forms fibrils more rapidly. Interestingly, fibrils of Aβ1-40 peptides ...

Limited proteolysis experiments have been carried out with the DEAD box protein eIF4A. The results suggest that there is a substantial conformational change in eIF4A upon binding single-stranded RNA. Binding of ADP induces conformational changes in the free enzyme and the enzyme.RNA complex, and binding of the ATP analogue AMP-PNP induces a conformational change in the enzyme.RNA complex. The p...

Using single-molecule fluorescence microscopy and particle-tracking techniques, we elucidate the role DNA topology plays in the diffusion and conformational dynamics of crowded DNA molecules. We focus on large (115 kbp), double-stranded ring and linear DNA crowded by varying concentrations (040%) of dextran (10, 500 kDa) that mimic cellular conditions. By tracking the center-of-mass and measuri...

Caseinolytic proteases are large oligomeric assemblies responsible for maintaining protein homeostasis in bacteria and in so doing influence a wide range of biological processes. The functional assembly involves three chaperones together with the oligomeric caseinolytic protease catalytic subunit P (ClpP). This protease represents a potential target for therapeutic intervention in pathogenic ba...

background: trichomonas vaginalis is the agent of urogenital tract infection that causes human trichomoniasis with some serious health complications. more understanding about genetic features of the parasite can be helpful in the study of the pathogenesis, drug susceptibility and epidemiology of the infection. for this end,we conducted analysis of the actin gene of t. vaginalis by applying the ...