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Comment on "Discovery of a polyketide carboxylate phytotoxin from a polyketide glycoside hybrid by β-glucosidase mediated ester bond hydrolysis" by X. Wang, D.-K. Kong, H.-R. Zhang, Y. Zou, , 2024, , 17183.
Chem Sci
January 2025
Department of Chemistry, University of British Columbia Vancouver Canada
We challenge the conclusion that the β-glucosidase in question directly catalyses hydrolysis of the substrate ester linkage. Rather we propose that this enzyme performs a normal glucoside hydrolysis and that the released aglycone undergoes rearrangement with formation of a quinone methide-like species through spontaneous cleavage of the ester.
View Article and Find Full Text PDFAnthraquinone-2-sulfonate immobilized on granular activated carbon inhibits methane production during the anaerobic digestion of swine wastewater.
Water Sci Technol
January 2025
Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (ITSON), 5 de Febrero 818 sur, Ciudad Obregón, Sonora 85000, México E-mail:
Granular activated carbon (GAC) and GAC modified with anthraquinone-2-sulfonate (AQS) were used as conductive materials during the anaerobic digestion of swine wastewater (SW). The electron transfer capacity (ETC) in the GAC-AQS was 2.1-fold higher than the unmodified GAC.
View Article and Find Full Text PDFIn this study, we investigated the ability of -quinone methide (-QM), an electron-poor diene, to undergo inverse electron-demand Diels-Alder (iEDDA) reaction with electron-rich dienophiles, resulting in fused-ring flavonoid systems. In addition, we explored the Michael-type addition using -QM and various nucleophiles, providing access to diarylmethane products. The cycloaddition reactions proceeded in a highly regioselective way, depending on the charge distribution of the reacting partners.
View Article and Find Full Text PDFActivating Redox Chemistry of Quinones for High Energy Density Aqueous Sodium-Ion Batteries.
J Am Chem Soc
January 2025
State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
Anode materials with high capacity and suitable redox potential are crucial for improving the energy density of aqueous sodium-ion batteries (ASIBs). And organic anode materials play a promising role due to their tunable electrochemical performance. However, the insufficient electroactive sites lead to a low capacity, hindering the elevation of energy density.
View Article and Find Full Text PDFQuinone extraction drives atmospheric carbon monoxide oxidation in bacteria.
Nat Chem Biol
January 2025
Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.
Diverse bacteria and archaea use atmospheric CO as an energy source for long-term survival. Bacteria use [MoCu]-CO dehydrogenases (Mo-CODH) to convert atmospheric CO to carbon dioxide, transferring the obtained electrons to the aerobic respiratory chain. However, it is unknown how these enzymes oxidize CO at low concentrations and interact with the respiratory chain.
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