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Engineering Saccharomyces cerevisiae for growth on xylose using an oxidative pathway.
Appl Microbiol Biotechnol
January 2025
Engineering Biology Research Center, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan.
The fermentative production of valuable chemicals from lignocellulosic feedstocks has attracted considerable attention. Although Saccharomyces cerevisiae is a promising microbial host, it lacks the ability to efficiently metabolize xylose, a major component of lignocellulosic feedstocks. The xylose oxidative pathway offers advantages such as simplified metabolic regulation and fewer enzymatic steps.
View Article and Find Full Text PDFThe effect of low energy LED red light on osteogenetic differentiation of periodontal ligament stem cell via the ERK5 signal pathway.
Lasers Med Sci
January 2025
The Department of Preventive Dentistry, The Affiliated Stomatological Hospital, Southwest Medical University, Luzhou, 646000, China.
The purpose of this study was to examine how low-energy LED red light influences the early to middle stage of osteogenic differentiation of periodontal ligament stem cells (PDLSCs) via the ERK5 signaling pathway. METHODS: PDLSCs were extracted from periodontal membrane tissue using enzymatic digestion. At three time points of 7, 10, and 14 days after irradiation with 5J/cm LED red light, the expression levels of early to middle-stage osteogenic-related genes ALP, Col-1, BSP, and OPN were detected by real-time fluorescence quantitative PCR(qRT-PCR) in both control and osteogenesis experimental groups.
View Article and Find Full Text PDFInoculum selection and hydraulic retention time impacts in a microbial fuel cell treating saline wastewater.
Appl Microbiol Biotechnol
January 2025
Environmental Microbiology Group, Institute of Water Research, University of Granada, 18003, Granada, Spain.
Microbial fuel cell (MFC) technology has received increased interest as a suitable approach for treating wastewater while producing electricity. However, there remains a lack of studies investigating the impact of inoculum type and hydraulic retention time (HRT) on the efficiency of MFCs in treating industrial saline wastewater. The effect of three different inocula (activated sludge from a fish-canning industry and two domestic wastewater treatment plants, WWTPs) on electrochemical and physicochemical parameters and the anodic microbiome of a two-chambered continuous-flow MFC was studied.
View Article and Find Full Text PDFAllosteric regulation of pyruvate kinase enables efficient and robust gluconeogenesis by preventing metabolic conflicts and carbon overflow.
mSystems
January 2025
Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Gluconeogenesis, the reciprocal pathway of glycolysis, is an energy-consuming process that generates glycolytic intermediates from non-carbohydrate sources. In this study, we demonstrate that robust and efficient gluconeogenesis in bacteria relies on the allosteric inactivation of pyruvate kinase, the enzyme responsible for the irreversible final step of glycolysis. Using the model bacterium as an example, we discovered that pyruvate kinase activity is inhibited during gluconeogenesis via its extra C-terminal domain (ECTD), which is essential for autoinhibition and metabolic regulation.
View Article and Find Full Text PDFReversible Redox Controlled DNA Condensation by a Simple Noncanonical Dicationic Diphenylalanine Derivative.
Biopolymers
March 2025
Departmento de Química Inorgánica y Orgánica, Universidad Jaume I, Castellón, Spain.
We report the reversible redox-controlled DNA condensation using a simple dicationic diphenylalanine derivative which contains a disulfide unit as linker. Despite the conventional belief that DNA condensing agents require a charge of +3 or higher, this dicationic molecule functions below its critical aggregation concentration, representing a non-canonical DNA condensing agent. The interaction with DNA of the studied compound combines electrostatic effects with hydrophobic/stacking interactions provided with the diphenylalanine moiety.
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