We reinvestigate a simple model used in the literature concerning the thermodynamic analysis of protein cold denaturation. We derive an exact thermodynamic expression for cold denaturation and give a better approximation than exists in the literature for predicting cold denaturation temperatures in the two-state model. We discuss the "dark-side" implications of this work for previous temperature-dependent protein dynamics experiments and discuss microfluidic experimental technologies, which could explore the thermal stability range of proteins below the bulk freezing point of water.
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http://dx.doi.org/10.1103/PhysRevE.104.034414 | DOI Listing |
Protein 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.
View Article and Find Full Text PDFDNA Repair (Amst)
December 2024
Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina. Electronic address:
The MSH7 protein is a binding partner of MSH2 forming the MutSγ complex. This complex contributes to the plant mismatch repair (MMR) system by recognizing DNA base-base mismatches. Here, we evaluated the impact of MSH7 on genetic diversity of the tenth generation (G) of wild type and MSH7 deficient Arabidopsis thaliana plants before and after two days exposure to 100 mM NaCl.
View Article and Find Full Text PDFProtein Expr Purif
March 2025
Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India. Electronic address:
Insulin is a pivotal peptide hormone essential for regulating glucose homeostasis. It has been known for over 100 years, but its production and purification methods are still under improvement. Escherichia coli based bacterial expression system is primarily used for insulin production.
View Article and Find Full Text PDFComp Biochem Physiol A Mol Integr Physiol
February 2025
Department of Biology, St. Francis Xavier University, 2320 Notre Dame Ave, Antigonish B2G 2W5, NS, Canada. Electronic address:
Heat shock proteins (HSPs) are well known to prevent and repair protein damage caused by various abiotic stressors, but their role in low temperature and freezing stress is not well-characterized in insects compared to other thermal challenges such as heat stress. Ice formation in and around cells is hypothesized to cause protein damage, yet many species of insects can survive freezing, suggesting HSPs may be an important mechanism in freeze tolerance. Here, we studied HSP70 in a freeze-tolerant cricket Gryllus veletis to better understand the role of HSPs in this phenomenon.
View Article and Find Full Text PDFFood Chem
March 2025
Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, 100048 Beijing, China; Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, 100048 Beijing, China. Electronic address:
This study explored using small molecular weight hydrolysates from enzymolyzed thawed drip as cryoprotectants to preserve myofibrillar protein quality in pork patties during freeze-thaw cycles. Hydrolysates were added at 0.36 %, 0.
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