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Unlocking the catalytic precision of ligand-controlled enzymatic halogenation.
Proc Natl Acad Sci U S A
January 2025
School of Biomolecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 10120, Thailand.
A single-component flavin-dependent halogenase, AetF, has emerged as an attractive biocatalyst for catalyzing halogenation. However, its flavin chemistry remains unexplored and cannot be predicted due to its uniqueness in sequence and structure compared to other flavin-dependent monooxygenases. Here, we investigated the flavin reactions of AetF using transient kinetics.
View Article and Find Full Text PDFHow amino acids intercalate in CaFe layered double hydroxides: A combined RIXS and NEXAFS study.
Chemphyschem
January 2025
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, PS-ISRR, GERMANY.
Two-dimensional layered double hydroxides (LDHs) are ideal candidates for a large number of (bio)catalytic applications due to their flexible composition and easy to tailor properties. Functionality can be achieved by intercalation of amino acids (as the basic units of peptides and proteins). To gain insight on the functionality, we apply resonant inelastic soft x-ray scattering and near edge x-ray absorption fine structure spectroscopy to CaFe LDH in its pristine form as well as intercalated with the amino acids proline and cysteine to probe the electronic structure and its changes upon intercalation.
View Article and Find Full Text PDFThe effect of biosynthesized zinc oxide nanoparticles on gene expression and apoptosis in triple-negative breast cancer cells.
Daru
December 2024
Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Objective(s): Some forms of breast cancer such as triple-negative phenotype, are serious challenge because of high metastatic cases, high mortality and resistance to conventional therapy motivated the search for alternative treatment approaches. Nanomaterials are promising candidates and suitable alternatives for improving tumor and cancer cell treatments.
Materials And Methods: Biosynthesis of ZnO NPs by help of Berberis integerrima fruit extract, has been done.
Evaluation of the Protein Profile of a Strain Immobilized in Biocapsules for Use in Fermented Foods.
Foods
November 2024
Department of Agricultural Chemistry, Edaphology and Microbiology, Agrifood Campus of International Excellence ceiA3, University of Córdoba, 14014 Córdoba, Spain.
Yeast biocapsules are a novel immobilization technology that could be used in fermentation processes. They are spherical structures consisting of yeast cells encapsulated and attached to the hyphae of a filamentous fungus. Yeast biocapsules offer a cutting-edge approach to cell immobilization, with significant potential for advancing fermented food production.
View Article and Find Full Text PDFEvolutionary insights into the stereoselectivity of imine reductases based on ancestral sequence reconstruction.
Nat Commun
November 2024
State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, East China University of Science and Technology, Shanghai, China.
The stereoselectivity of enzymes plays a central role in asymmetric biocatalytic reactions, but there remains a dearth of evolution-driven biochemistry studies investigating the evolutionary trajectory of this vital property. Imine reductases (IREDs) are one such enzyme that possesses excellent stereoselectivity, and stereocomplementary members are pervasive in the family. However, the regulatory mechanism behind stereocomplementarity remains cryptic.
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