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Shotgun and targeted proteomics of Mycolicibacterium smegmatis highlight the role of arginine phosphorylation in the functional adaptation to its environment.
J Proteomics
January 2025
State Key Laboratory of Medical Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Research Unit of Proteomics & Research and Development of New Drug of Chinese Academy of Medical Sciences, Institute of Lifeomics, Beijing 102206, China. Electronic address:
Although the phosphorylation of serine (S), threonine (T), and tyrosine (Y) is well-established, arginine phosphorylation (pR) has recently garnered significant attention due to its crucial role in bacteria pathogenicity and stress response. Mycolicibacterium smegmatis, a nonpathogenic surrogate of Mycobacterium tuberculosis, serves as a model for studying mycobacterial pathogenesis. A recent proteomics study identified six pR proteins in M.
View Article and Find Full Text PDFThe second life for unused COVID-19 vaccines: Towards biosensing application.
Talanta
January 2025
State Research Institute Center for Physical and Technological Sciences, Sauletekio ave. 3, Vilnius, Lithuania; Pharmacy and Pharmacology Center, Faculty of Medicine, Vilnius University, Ciurlionio str. 21, Vilnius, Lithuania. Electronic address:
Many vaccines have been produced during the COVID-19 pandemic. Currently, an increasing number of vaccines have reached an expiration date without being used. Therefore, expired vaccines (EXVAX) based on virus-like particles (VLP) recombinant SARS-CoV2-S protein can be repurposed for biosensing application and provide a use, even though they are past their expiration date for vaccination.
View Article and Find Full Text PDFDevelopment of morphology-dependent nanoselenium carriers for enhancing biological activity and reducing plant stress.
Ecotoxicol Environ Saf
January 2025
Department of Plant and Environmental Health, Anhui Provincial Key Laboratory of Hazardous Factors and Risk Control of Agri-food Quality Safety, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China. Electronic address:
Owing to their small size, morphology and release modification properties, nanopesticides are considered promising alternative strategies for enhancing biological activity and minimizing pesticide losses. In this study, we used a colloidal self-assembly method to develop a morphology-stable, regularly rod-shaped nanoselenium pesticide carrier (NSer), which was further modified with chitosan. After loading penthiopyrad (PEN), the biological activity of NSer@PEN and its impact on the physiological and biochemical processes of plants were further compared with those of spherical nanoselenium pesticides (NSes@PEN) and commercial materials (20 % PEN SC).
View Article and Find Full Text PDFScoring Conformational Metastability of Macrocyclic Peptides with Binding Pose Metadynamics.
J Chem Inf Model
January 2025
Department of Modeling and Informatics, Merck & Co., Inc., Rahway, New Jersey 07065, United States.
Potency optimization of macrocyclic peptides can include both modifying intermolecular interactions and modifying the conformational stability of the bioactive conformation. However, the number of possible modifications is vast. To identify modifications that enhance the stability of the binding conformations in a cost-effective manner, there is a need for a high-throughput in-silico method that scores the conformational stability of these modified molecules.
View Article and Find Full Text PDFObservation of Ɛ-AlKeggin-Oligonucleotide Complexes in Analytical Sample Solutions.
J Pharm Sci
January 2025
Ionis Pharmaceuticals, Inc., 2855 Gazelle Ct., Carlsbad, CA 92010. Electronic address:
Complexes formed between aluminum cluster molecules that adopt a Ɛ-Al-Keggin structure and antisense oligonucleotides were observed as new impurity peaks during drug product stability testing. The Ɛ-Al-Keggin molecules were determined to be artifacts of the analysis, originating from contact between antisense oligonucleotide drug product solution and aluminum weigh boats used to prepare the analytical sample solutions The presence of the Ɛ-Al-Keggin molecules was confirmed through synthesis of the Keggin molecule through an established route and subsequent spiking studies. Binding affinity studies revealed that the Ɛ-Al-Keggin bound to oligonucleotide sequences of various lengths (10 to 20 bases) and base compositions, though there is some evidence for preferential binding to 5-methylcytosine-containing sequences.
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