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Crystal structure and functional characterization of a novel bacterial lignin-degrading dye-decolorizing peroxidase.
Int J Biol Macromol
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Department of Life Sciences and Systems Biology, University of Torino, Italy.
A new gene coding for an iron-containing enzyme was identified in the genome of Acinetobacter radioresistens. Bioinformatics analysis allowed the assignment of the protein to DyP peroxidases, due to the presence of conserved residues involved in heme binding and catalysis. Moreover, Ar-DyP is located in an operon coding also for other enzymes involved in iron uptake and regulation.
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Chemistry
January 2025
Politecnico di Milano, Department of Chemistry, Materials, Chemical Engineer., via Mancinelli 7, 20131, Milan, ITALY.
Molecular recognition mediated by s-hole interactions is enhanced as the electrostatic potential at the σ-hole becomes increasingly positive. Traditional methods to strengthen σ-hole donor ability of atoms such as halogens often involve covalent modifications, such as, introducing electron-withdrawing substituents (neutral or positively charged) or electrochemical oxidation. Metal coordination, a relatively underexplored approach, offers a promising alternative.
View Article and Find Full Text PDFCustomized Design of Covalent Organic Framework with Asymmetric Dual-Function Hybrid Linkages for Promoting HO Photosynthesis in Air and Water.
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National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing, East China University of Technology, Nanchang 330013, China.
Efficient sacrificial-agent-free photosynthesis of HO from air and water represents the greenest, lowest-cost, most real-time avenue for HO production but remains a challenging issue. Here, we show a general and effective approach through a structural design on covalent organic frameworks (COFs) with asymmetric dual-function hybrid linkages for boosting the HO photosynthesis of the COFs. Through such design we can equip a COF with not only a catalytic active center but also a special function for isolating the D-A motif, which consequently endows the COF (CI-COF) built on asymmetric dual-function hybrid linkages with a significantly enhanced efficiency in the generation, transmission, and separation of photogenerated carriers, relative to the COF (II-COF and CC-COF) built on symmetric single-function single linkages.
View Article and Find Full Text PDFPyrazinyl-Substituted Aminoazoles as Covalent Inhibitors of Thrombin: Synthesis, Structure, and Anticoagulant Properties.
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Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, 48149 Münster, Germany.
This study presents a novel series of -acylated 1,2,4-triazol-5-amines and 1-pyrazol-5-amines, featuring a pyrazin-2-yl moiety, developed as covalent inhibitors of thrombin. These compounds demonstrated potent inhibitory activity, with derivatives and achieving IC values as low as 0.7 and 0.
View Article and Find Full Text PDFConstruction of Luminescent Three-Dimensional Covalent Organic Frameworks for Molecular Decoding of Wide Organic Compounds.
Chem Asian J
January 2025
Qingdao University of Science and Technology, College of Polymer Science and Engineering, 53 ZHENGZHOU ROAD, 266000, Qingdao, CHINA.
Constructing highly conjugated three-dimensional covalent organic frameworks (3D COFs), particularly those with luminescent features, remains a significant challenge. In this work, we successfully synthesized a 3D COF, named 3D-Py-SP-COF, using a rigid and orthogonal spirobifluorene building block for the spatial 3D structure construction and planar pyrene as luminescent units. The incorporation of the pyrene and the unique rigid 3D network structure endow 3D-Py-SP-COF with fluorescent properties.
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