Protein aggregation and amyloidogenesis are closely associated with the pathogenesis of neurodegenerative diseases. Elucidating the morphology and structure of the amyloid aggregates or fibrils is important for understanding the molecular mechanisms of these proteinopathies. This review article describes the general principle and establishment of solid-state circular dichroism (ssCD) spectroscopy, and discusses its application for the analysis of secondary structures of proteins or peptides in amyloids and structural transformation of these proteins or peptides during their amyloidogenic aggregation.
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http://dx.doi.org/10.2174/1389203717666160709185323 | DOI Listing |
Sci Rep
January 2025
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Many types of spatiotemporal patterns have been observed under nonequilibrium conditions. Cycling through four or more states can provide specific dynamics, such as the spatial coexistence of multiple phases. However, transient dynamics have only been studied by previous theoretical models, since absorbing transition into a uniform phase covered by a single state occurs in the long-time limit.
View Article and Find Full Text PDFACS Appl Polym Mater
December 2024
School of Chemistry and Chemical Engineering, Queen's University, David Keir Building, Stranmillis Road, BT9 5AG Belfast, Northern Ireland, U.K.
Phosphorus (P) fertilizer is an essential component of our food system with the majority of all mined P rock processed to make mineral fertilizers. Globally however P rock stocks are declining-both in quality and quantity-with poor P management creating a linear economic system where P is mined, globally redistributed into products and eventually discharged into the environment leading to eutrophication. To enable establishment of a circular P economy, whereby P can be recovered from waste for its industrial reuse, requires the development of effective P recovery technologies.
View Article and Find Full Text PDFJ Chem Phys
December 2024
Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Kaiserstraße 12, 76131 Karlsruhe, Germany.
The formalism to calculate excited state properties from the GW-Bethe-Salpeter equation (BSE) method is introduced, providing convenient access to excited state absorption, excited state circular dichroism, and excited state optical rotation in the framework of the GW-BSE method. This is achieved using the second-order transition density, which can be obtained by solving a set of auxiliary equations similar to time-dependent density functional theory (TD-DFT). The proposed formulation therefore leads to no increase in the formal computational complexity when compared to the corresponding ground state properties.
View Article and Find Full Text PDFFront Bioeng Biotechnol
December 2024
State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, Henan University, Kaifeng, China.
In this study, a strain isolated from the surface of flue-cured tobacco leaves, identified as HJ-16, was applied in the solid-state fermentation of tobacco leaves. This strain, known for producing thermally stable enzymes, including amylase, cellulase, and protease, significantly improved the sensory qualities of tobacco, enhancing aromatic intensity, density, and softness, while reducing irritation. Whole-genome sequencing and functional annotation revealed that HJ-16 possesses a single circular chromosome containing genes associated with enzyme production and metabolic activities, particularly in carbohydrate metabolism and amino acid metabolism.
View Article and Find Full Text PDFGigascience
January 2024
Department of Health Technology, Technical University of Denmark, Kongens Lyngby 2800, Denmark.
Background: Corneocyte surface nanoscale topography (nanotexture) has recently emerged as a potential biomarker for inflammatory skin diseases, such as atopic dermatitis (AD). This assessment method involves quantifying circular nano-size objects (CNOs) in corneocyte nanotexture images, enabling noninvasive analysis via stratum corneum (SC) tape stripping. Current approaches for identifying CNOs rely on computer vision techniques with specific geometric criteria, resulting in inaccuracies due to the susceptibility of nano-imaging techniques to environmental noise and structural occlusion on the corneocyte.
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