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Biophysics is the study of physical phenomena and physical processes in living things, on scales spanning molecules, cells, tissues and organisms. Biophysicists use the principles and methods of physics to understand biological systems. It is an interdisciplinary science, closely related to quantitative and systems biology.
An experimental method to study how cells sense and react to external mechanical forces combines controlled mechanical stimulation using nanopipettes with fluorescence imaging of membrane tension. This approach facilitates the study of mechanosensitive ion channels and the propagation of cell membrane tension.
A clear picture of how and why cells inevitably lose viability is still lacking. A dynamical systems view of starving bacteria points to a continuous energy expenditure needed for maintaining the right osmotic pressure as an important factor.
Liquid droplets form in cells to concentrate specific biomolecules (while excluding others) in order to perform specific functions. The molecular mechanisms that determine whether different macromolecules undergo co-partitioning or exclusion has so far remained elusive. Now, two studies uncover key principles underlying this selectivity.
This study explores alternative stable states in microbial communities. Focusing on a respiratory tract community of 6 species, the authors identified four distinct stable states that are predicted to be driven by cooperative growth. The findings contrast with the common association between competitive interactions and multistability in microbial communities.
BAX and BAK are proapoptotic proteins that directly mediate mitochondrial outer membrane permeabilization (MOMP). Here, lipidomics and other data provide insight on how local lipid environment affects BAX and BAK function during apoptosis, suggesting that unsaturated lipids promote BAX pore activity.
Developing physical methods to modulate biomolecular condensates on cell membranes is of great importance for understanding physiological processes and stimulating novel therapeutic strategies. We propose an effective means to control receptor condensation on cell membranes via adhesion to a supported lipid bilayer with nanoscale topography.
Here the authors connect inherited Apolipoprotein E genotype with the risk of developing Alzheimer’s disease by demonstrating how, in an isoform- and lipidation-specific way, apoE modulates the aggregation, clearance and toxicity of Amyloid-beta.
The TREK K2P channel activity is dynamically regulated by protein kinase-dependent signaling pathways involved in the development of various human diseases. Here, the authors report how phosphorylation at the proximal C-terminus induces allosteric deactivation of the selectivity filter gate.
An experimental method to study how cells sense and react to external mechanical forces combines controlled mechanical stimulation using nanopipettes with fluorescence imaging of membrane tension. This approach facilitates the study of mechanosensitive ion channels and the propagation of cell membrane tension.
A clear picture of how and why cells inevitably lose viability is still lacking. A dynamical systems view of starving bacteria points to a continuous energy expenditure needed for maintaining the right osmotic pressure as an important factor.
Liquid droplets form in cells to concentrate specific biomolecules (while excluding others) in order to perform specific functions. The molecular mechanisms that determine whether different macromolecules undergo co-partitioning or exclusion has so far remained elusive. Now, two studies uncover key principles underlying this selectivity.