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Two new enzymes that liberate undecaprenyl-phosphate to replenish the carrier lipid pool during envelope stress.
mBio
January 2025
Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA.
The 55-carbon isoprenoid, undecaprenyl-phosphate (UndP), is a universal carrier lipid that ferries most glycans and glycopolymers across the cytoplasmic membrane in bacteria. In addition to peptidoglycan precursors, UndP transports O-antigen, capsule, wall teichoic acids, and sugar modifications. How this shared but limited lipid is distributed among competing pathways is just beginning to be elucidated.
View Article and Find Full Text PDFMolecular dynamics simulations of functionalized hBN nanopores in water: Ab initio force field and implications for water desalination.
J Chem Phys
January 2025
Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
Heteropolar two-dimensional materials, including hexagonal boron nitride (hBN), are promising candidates for seawater desalination and osmotic power harvesting, but previous simulation studies have considered bare, unterminated nanopores in molecular dynamics (MD) simulations. There is presently a lack of force fields to describe functionalized nanoporous hBN in aqueous media. To address this gap, we conduct density functional theory (DFT)-based ab initio MD simulations of hBN nanopores surrounded by water molecules.
View Article and Find Full Text PDFTrafficking of Muscarinic 1 Acetylcholine Receptor Regulated by VPS35 in Alzheimer's Disease.
Curr Alzheimer Res
January 2025
Department of Neurology, The Second Affiliated Hospital of Xiamen Medical College, Fujian, 361000, China.
Introduction: Muscarinic 1 acetylcholine receptor (M1AChR) is a member of the Gprotein- coupled receptor superfamily, with the dysfunction being linked to the onset of Alzheimer's Disease (AD).
Aims: Retromer complex with Vacuolar Protein Sorting-35 (VPS35) as the core plays an important role in the transport of biological proteins and has been confirmed to be closely related to the pathogenesis of AD. This study was designed to determine whether VPS35 could affect the trafficking mechanism of M1AChRs.
Flotillins in membrane trafficking and physiopathology.
Biol Cell
January 2025
CRBM (Centre de Recherche en Biologie cellulaire de Montpellier), BIOLuM, University of Montpellier, CNRS UMR 5237, Montpellier, France.
Flotillin 1 and 2 are highly conserved and homologous members of the stomatin, prohibitin, flotillin, HflK/C (SPFH) family. These ubiquitous proteins assemble into hetero-oligomers at the cytoplasmic membrane in sphingolipid-enriched domains. Flotillins play crucial roles in various cellular processes, likely by concentrating sphingosine.
View Article and Find Full Text PDFFluorine-Free Ion-Selective Membrane with Enhanced Mg Transport for Mg-Organic Batteries.
ACS Nano
January 2025
Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, Texas 77204, United States.
Magnesium batteries offer a safer alternative for next-generation battery technology due to their insusceptibility to dendrite deposition. Selective membranes tailored for magnesium-ion conduction will unlock further technological advancement. Herein, we demonstrate fluorine-free magnesiated sulfonated poly(ether ether ketone) (Mg-SPEEK) selective membranes capable of facilitating magnesium-ion conduction while effectively rejecting soluble organic species.
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