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Molecular Determinants of Optical Modulation in ssDNA-Carbon Nanotube Biosensors.
ACS Nano
January 2025
Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia 20147, United States.
Most traditional optical biosensors operate through molecular recognition, where ligand binding causes conformational changes that lead to optical perturbations in the emitting motif. Optical sensors developed from single-stranded DNA-functionalized single-walled carbon nanotubes (ssDNA-SWCNTs) have started to make useful contributions to biological research. However, the mechanisms underlying their function have remained poorly understood.
View Article and Find Full Text PDFDisruption of a potential disulfide bond of Cys65-Cys141 on the structure and stability of globin X from zebrafish.
Phys Chem Chem Phys
January 2025
School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.
Globin X is a newly discovered member of the globin family, while its structure and function are not fully understood. In this study, we performed protein modelling studies using Alphafold3 and molecular dynamics simulations, which suggested that the protein adopts a typical globin fold, with the formation of a potential disulfide bond of Cys65 and Cys141. To elucidate the role of this unique disulfide in protein structure and stability, we constructed a double mutant of C65S/C141S by mutating the two cysteine residues to serine.
View Article and Find Full Text PDFMechanisms Underlying the Size-Dependent Neurotoxicity of Polystyrene Nanoplastics in Zebrafish.
Environ Sci Technol
January 2025
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China.
Nanoplastics (NPs) are ubiquitous in the environment, posing significant threats to biological systems, including nervous systems, across various trophic levels. Nevertheless, the molecular mechanisms behind the size-dependent neurotoxicity of NPs remain unclear. Here, we investigated the neurotoxicity of 20 and 100 nm polystyrene NPs (PS-NPs) to zebrafish.
View Article and Find Full Text PDFEcological Drivers of Evolution of Swine Influenza in the United States: A Review.
Emerg Microbes Infect
January 2025
Center for Influenza and Emerging Diseases, University of Missouri, Columbia, MO 652011, USA.
Influenza A viruses (IAVs) pose a major public health threat due to their wide host range and pandemic potential. Pigs have been proposed as "mixing vessels" for avian, swine, and human IAVs, significantly contributing to influenza ecology. In the United States, IAVs are enzootic in commercial swine farming operations, with numerous genetic and antigenic IAV variants having emerged in the past two decades.
View Article and Find Full Text PDFAb initio study on the dynamics and spectroscopy of collective rovibrational polaritons.
J Chem Phys
January 2025
Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter Sétány 1/A, H-1117 Budapest, Hungary.
Accurate rovibrational molecular models are employed to gain insight in high-resolution into the collective effects and intermolecular processes arising when molecules in the gas phase interact with a resonant infrared (IR) radiation mode. An efficient theoretical approach is detailed, and numerical results are presented for the HCl, H2O, and CH4 molecules confined in an IR cavity. It is shown that by employing a rotationally resolved model for the molecules, revealing the various cavity-mediated interactions between the field-free molecular eigenstates, it is possible to obtain a detailed understanding of the physical processes governing the energy level structure, absorption spectra, and dynamic behavior of the confined systems.
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