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Autocatalytic Interfacial Synthesis of Self-Standing Amide-Linked Covalent Organic Framework Membranes.
Angew Chem Int Ed Engl
January 2025
Tongji University, School of Chemical Science and Engineering, Chifeng Road No.67, Shanghai, CHINA.
The synthesis of crystalline covalent organic frameworks (COFs) has in principle relied on reversible dynamic chemistry. A general method to synthesize irreversibly bonded COFs is urgently demanded for driving the COF chemistry to a new era. Here we report a universal two-step method for the straightforward synthesis of irreversibly amide-linked COF (AmCOF) membranes by autocatalytic interfacial polymerization (AIP).
View Article and Find Full Text PDFTunable phase behaviors of diblock copolyelectrolytes under alternating electric fields: A coarse-grained molecular dynamics study.
J Chem Phys
January 2025
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China.
Diblock copolyelectrolytes have significant potential in applications such as solid-state single-ion conductors, but precisely controlling their nanostructures for efficient ion transport remains a challenge. In this study, we explore the phase behavior and microphase transitions of AX BY-type diblock copolyelectrolytes under alternating electric fields using coarse-grained molecular dynamics simulations. We systematically investigate the effects of various electric field features, including unipolar and bipolar square-waves, as well as offset and non-offset sine-waves, focusing on how field strength and period influence the self-assembling morphology of the copolyelectrolytes.
View Article and Find Full Text PDFMultifunctional DNA-Metal Nanohybrids Derived From DNA-MgPPi Microhybrids by Rolling Circle Amplification.
Small Methods
January 2025
Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Rolling circle amplification (RCA)-derived ultra-long DNA is highly attractive and versatile because of its diverse functionalities conferred by repeated DNA nanostructures. However, magnesium pyrophosphate (MgPPi) crystals, as byproducts of RCA, electrostatically interact with the DNA to form DNA microhybrids and hamper its broad bioapplications, as its large size is unfavorable for cellular uptake and decreases the density of functional DNA nanostructures. In this study, finely tuned synthesis strategies are developed to condense the microhybrids and replace non-functional MgPPi crystals with various functional metal nanostructures by reducing metal ions.
View Article and Find Full Text PDFAssembly of tight junction belts by ZO1 surface condensation and local actin polymerization.
Dev Cell
December 2024
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany; Technische Universität Dresden, Biotechnologisches Zentrum, Center for Molecular and Cellular Bioengineering (CMCB), Dresden, Germany; Cluster of Excellence Physics of Life, TU Dresden, Dresden, Germany. Electronic address:
Tight junctions play an essential role in sealing tissues, by forming belts of adhesion strands around cellular perimeters. Recent work has shown that the condensation of ZO1 scaffold proteins is required for tight junction assembly. However, the mechanisms by which junctional condensates initiate at cell-cell contacts and elongate around cell perimeters remain unknown.
View Article and Find Full Text PDFIn situ architecture of a nucleoid-associated biomolecular co-condensate that regulates bacterial cell division.
Proc Natl Acad Sci U S A
January 2025
Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, Marburg 35043, Germany.
In most bacteria, cell division depends on the tubulin-homolog FtsZ that polymerizes in a GTP-dependent manner to form the cytokinetic Z-ring at the future division site. Subsequently, the Z-ring recruits, directly or indirectly, all other proteins of the divisome complex that executes cytokinesis. A critical step in this process is the precise positioning of the Z-ring at the future division site.
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