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Temperature-Dependent Rotation of Protonated Methyl Groups in Otherwise Deuterated Proteins Modulates DEER Distance Distributions.
Appl Magn Reson
October 2024
Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520 USA.
Unlabelled: Temperature-dependent DEER effects are observed as a function of methyl rotation by either leucine- or nitroxide-specific protonated methyl groups in an otherwise deuterated background. Both species induce a site-specific enhancement in the apparent relaxation of the paramagnetic nitroxide label. The presence of a single protonated methyl group in close proximity (4-10 Å) to only one of the two nitroxide rotamer ensembles in AviTagged immunoglobulin-binding B domain of protein A results in a selective and substantial decrease in , manifested by differential decay of the peak intensities in the bimodal distance distribution as a function of the total dipolar evolution time, temperature, or both.
View Article and Find Full Text PDFRole of inflammasomes in acute respiratory distress syndrome.
Thorax
January 2025
Victor Phillip Dahdaleh Heart & Lung Research Institute, University of Cambridge, Cambridge, UK.
Acute respiratory distress syndrome (ARDS) is present in >10% of all people admitted to critical care and is associated with severe morbidity and mortality. Despite more than half a century since its first description, no efficacious pharmacological therapies have been developed, and little progress has been made in improving clinical outcomes. Neutrophils are the principal drivers of ARDS, with their priming and subsequent aberrant downstream functions, including interleukin (IL) 1β and IL-18 secretion, central to the disease pathogenesis.
View Article and Find Full Text PDFTargeting the NLRP3 inflammasome in Parkinson's disease: From molecular mechanism to therapeutic strategy.
Exp Neurol
January 2025
Department of Clinical Laboratory Medicine, Zhuzhou Kind Cardiovascular Disease Hospital, Hunan Province, China. Electronic address:
Parkinson's disease is the second most common neurodegenerative disease, characterized by substantial loss of dopaminergic (DA) neurons, the formation of Lewy bodies (LBs) in the substantia nigra, and pronounced neuroinflammation. The nucleotide-binding domain like leucine-rich repeat- and pyrin domain-containing protein 3 (NLRP3) inflammasome is one of the pattern recognition receptors (PRRs) that function as intracellular sensors in response to both pathogenic microbes and sterile triggers associated with Parkinson's disease. These triggers include reactive oxygen species (ROS), misfolding protein aggregation, and potassium ion (K) efflux.
View Article and Find Full Text PDFCARD domains mediate anti-phage defence in bacterial gasdermin systems.
Nature
January 2025
Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel.
Caspase recruitment domains (CARDs) and pyrin domains are important facilitators of inflammasome activity and pyroptosis. Following pathogen recognition by nucleotide binding-domain, leucine-rich, repeat-containing (NLR) proteins, CARDs recruit and activate caspases, which, in turn, activate gasdermin pore-forming proteins to induce pyroptotic cell death. Here we show that CARD domains are present in defence systems that protect bacteria against phage.
View Article and Find Full Text PDFPost-exercise myofibrillar protein synthesis rates do not differ following 1.5 g essential amino acids compared to 15 and 20 g of whey protein in young females.
Am J Physiol Endocrinol Metab
January 2025
Nutritional Physiology Group, Department of Public Health and Sport Sciences, University of Exeter, Exeter, Devon, UK.
Optimal adaptation to resistance exercise requires maximal rates of myofibrillar protein synthesis (MyoPS), which can be achieved by postexercise consumption of >20 g of protein or ~2 g of the essential amino acid (EAA) leucine. These nutritional recommendations are based on studies in males. The aim of the present study was to compare the postexercise MyoPS response to nutrition in young females.
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