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Molecular Uranium Dioxide-Mediated CO Photoreduction.
J Am Chem Soc
January 2025
Department of Chemistry and Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education, Tsinghua University, Beijing 100084, China.
The reduction of CO mediated by transition metals has garnered significant interest, yet little is known about the reduction of CO using f-element compounds. Herein, the reduction of CO to CO by tetravalent uranium (U) compound UO is investigated via matrix isolation infrared spectroscopy and quantum chemical study. Our results reveal that a stable carbonate intermediate OUCO () can be prepared at low temperatures (4-12 K).
View Article and Find Full Text PDFDual-OR Logic-Gated Lateral Flow Strip Assay Based on Colorimetric-Fluorescence Dual Indication for Screening of HPV16/18 in Multiple Scenarios.
Anal Chem
January 2025
Center of Clinical Laboratory Medicine, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, Jiangsu, China.
The incidence of cervical cancer continues to rise in underdeveloped regions due to low human papillomavirus (HPV) vaccination rates and inadequate screening systems. To achieve convenient, rapid, and accurate detection of HPV, we developed a three-wire lateral flow strip assay system based on dual-OR logic gates for rapid and simultaneous detection of HPV subtypes 16 and 18 in a single test. The system combines three-branch-catalytic hairpin assembly (TCHA)-mediated signal amplification with simple OR logic gate-based signal output to improve detection rates while enabling HPV 16/18 subtype identification.
View Article and Find Full Text PDFCofactor-directed co-immobilization of dual-enzyme on functionalized montmorillonite with enhanced catalytic performance.
Int J Biol Macromol
January 2025
School of Environment and Resource, Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
Recently, multi-enzyme cascade catalysis has attracted increasing attention due to the advantages of integrating multiple enzymes, few side reactions and high catalytic efficiency. Herein, a novel dual-enzyme cascade system (GOx-FMt-HRP) was developed through cofactor-directed orientational co-immobilization of glucose oxidase (GOx) and horseradish peroxidase (HRP) onto functional montmorillonite (FMt). The presented method realizes the reconstitution of cofactors and apo-enzymes (enzymes without cofactors), which enables enzymes to be immobilized in specific orientations on the support, thereby effectively reducing changes in their conformation.
View Article and Find Full Text PDFNoncanonical inhibition of topoisomerase II alpha by oxidative stress metabolites.
Redox Biol
January 2025
University of Chicago, Department of Molecular Genetics and Cell Biology, 929 E. 57th Street, Chicago, IL, 60637, USA. Electronic address:
During its catalytic cycle, the homodimeric ATPase topoisomerase II alpha (TOP2A) cleaves double stranded DNA and remains covalently bound to 5' ends via tyrosine phosphodiester bonds. After passing a second, intact duplex through, TOP2A rejoins the break and releases from the DNA. Thereby, TOP2A can relieve strain accumulated during transcription, replication and chromatin remodeling and disentangle sister chromatids for mitosis.
View Article and Find Full Text PDFIdentical Fe-N Sites with Different Reactivity: Elucidating the Effect of Support Curvature.
ACS Appl Mater Interfaces
January 2025
CEITEC-Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno 61200, Czech Republic.
Detailed atomic-scale understanding is a crucial prerequisite for rational design of next-generation single-atom catalysts (SACs). However, the sub-ångström precision needed for systematic studies is challenging to achieve on common SACs. Here, we present a two-dimensional (2D) metal-organic system featuring Fe-N single-atom sites, where the metal-organic structure is modulated by 0.
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