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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 PDFRational design of redox active metal organic frameworks for mediated electron transfer of enzymes.
Mater Horiz
January 2025
Department of Material Sciences, Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Ibaraki 305-5358, Japan.
The efficient immobilization of redox mediators remains a major challenge in the design of mediated enzyme electrode platforms. In addition to stability, the ability of the redox-active material to mediate electron transfer from the active-site buried enzymes, such as flavin adenine dinucleotide-dependent glucose dehydrogenase (FADGDH) and lactate oxidase (LOx), is also crucial. Conventional immobilization techniques can be synthetically challenging, and immobilized mediators often exhibit limited durability, particularly in continuous operation.
View Article and Find Full Text PDFSupplying LSD1 with FAD in pancreatic cancer: a matter of protein-protein interaction?
Arch Biochem Biophys
January 2025
Department of Biosciences, Biotechnologies, and Environment, University of Bari Aldo Moro, Italy. Electronic address:
Lysine-specific demethylase 1 (LSD1) is a key regulator in cancer epigenetic, and its activity is reliant on flavin adenine dinucleotide (FAD) as a cofactor. In this study, we investigated the correlation between LSD1 and FAD synthase isoform 2 (FADS2) protein levels in pancreatic ductal adenocarcinoma (PDAC) cell lines. We first assessed LSD1 protein and mRNA levels in mutant p53-expressing PANC-1 and MiaPaCa2 cells and p53-null AsPc-1 cells, compared to human pancreatic ductal epithelial (HPDE) controls.
View Article and Find Full Text PDFπ-π stacking interactions in tryptophan-lumiflavin-tyrosine: a structural model for riboflavin insertion into riboflavin-binding protein.
J Mol Model
January 2025
Department of Natural Sciences, University of Michigan-Dearborn, Dearborn, MI, 48128, USA.
Context: Riboflavin (RF), also known as B2 vitamin, is the precursor to flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), two co-enzymes involved in many electron transport processes. Interactions of the isoalloxazine ring, common to all three compounds, are of great interest due to their biological function in flavoproteins and relevance in the transport by the carrier protein leading to development of drug delivery strategies and non-invasive diagnostics techniques. Based on protein crystallographic data, a computational investigation of the interactions in the complexes between lumiflavin, a model compound, and aromatic amino acids, tyrosine and tryptophan, was pursued with the goal of characterizing noncovalent interactions.
View Article and Find Full Text PDFEvolutionary Adaptations in Biliverdin Reductase B: Insights into Coenzyme Dynamics and Catalytic Efficiency.
Int J Mol Sci
December 2024
Department of Biochemistry and Molecular Genetics, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
Biliverdin reductase B (BLVRB) is a redox regulator that catalyzes nicotinamide adenine dinucleotide phosphate (NADPH)-dependent reductions of multiple substrates, including flavins and biliverdin-β. BLVRB has emerging roles in redox regulation and post-translational modifications, highlighting its importance in various physiological contexts. In this study, we explore the structural and functional differences between human BLVRB and its hyrax homologue, focusing on evolutionary adaptations at the active site and allosteric regions.
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