The coupling of structural transitions to heat capacity changes leads to destabilization of macromolecules at both elevated and lowered temperatures. DNA origami not only exhibit this property but also provide a nanoscopic observable of cold denaturation processes by directing intramolecular strain to the most sensitive elements within their hierarchical architecture.
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http://dx.doi.org/10.1039/d3cc05985e | DOI Listing |
JAMA Ophthalmol
January 2025
Ophthalmology Department, Dijon University Hospital, Dijon, France.
Importance: Some patients worldwide are asked to acquire an anti-vascular endothelial growth factor (anti-VEGF) agent from a pharmacy, store it, and then bring it to a physician for intravitreal injection (IVT). Anti-VEGF agents must be stored in the refrigerator to avoid bacterial contamination or denaturation. Some cases of severe intraocular inflammation have been reported following IVT of more recently approved anti-VEGF agents, which might be explained by thermal instability.
View Article and Find Full Text PDFQ Rev Biophys
January 2025
Elettra Sincrotrone Trieste, Italy.
Yeast frataxin (Yfh1) is a small natural protein from yeast that has the unusual property of undergoing cold denaturation at temperatures above the freezing point of water when under conditions of low ionic strength. This peculiarity, together with remarkable resilience, allows the determination, for the whole protein as well as for individual residues, of the stability curve, that is the temperature dependence of the free energy difference between the unfolded and folded forms. The ease of measuring stability curves without the need to add denaturants or introduce destabilizing mutations makes this protein an ideal 'tool' for investigating the influence of many environmental factors on protein stability.
View Article and Find Full Text PDFBiochem Mol Biol Educ
January 2025
Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA.
We created a novel laboratory experience where undergraduate students explore the techniques used to study protein misfolding, unfolding, and aggregation. Despite the importance of protein misfolding and aggregation diseases, protein unfolding is not typically explored in undergraduate biochemistry laboratory classes. Yeast alcohol dehydrogenase (YADH) is used in the undergraduate biochemistry laboratory course at Miami University as the model system to explore protein overexpression and purification, bioinformatics, and enzyme characterization.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Metabolic Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea.
The black soldier fly, , is a voracious scavenger of various organic materials; therefore, it could be exploited as a biological system for processing daily food waste. In order to survey novel hydrolytic enzymes, we constructed a fosmid metagenome library using unculturable intestinal microorganisms from . Through functional screening of the library on carboxymethyl cellulose plates, we identified a fosmid clone, the product of which displayed hydrolytic activity.
View Article and Find Full Text PDFProtein Sci
January 2025
Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan.
Antibodies and antibody mimics are extensively used in the pharmaceutical industry, where stringent safety standards are required. Implementing heat sterilization during or after the manufacturing process could help prevent contamination by viruses and bacteria. However, conventional antibodies and antibody mimics are not suitable for heat sterilization because they irreversibly denature at high temperatures.
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