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Evidence for corrin biosynthesis in the last universal common ancestor.
FEBS J
December 2024
Department of Functional and Evolutionary Ecology, University of Vienna, Austria.
Corrinoids are cobalt-containing tetrapyrroles. They include adenosylcobalamin (vitamin B) and cobamides that function as cofactors and coenzymes for methyl transfer, radical-dependent and redox reactions. Though cobamides are the most complex cofactors in nature, they are essential in the acetyl-CoA pathway, thought to be the most ancient CO-fixation pathway, where they perform a pterin-to-cobalt-to-nickel methyl transfer reaction catalyzed by the corrinoid iron-sulphur protein (CoFeS).
View Article and Find Full Text PDFComprehensive Analysis of Deuterium Isotope Effects on Ionic HOπ Interactions Using Multi-Component Quantum Mechanics Methods.
J Comput Chem
January 2025
Graduate School of NanobioScience, Yokohama City University, Yokohama, Japan.
Deuterium isotope effects on interaction energies and geometrical parameters in several HO(DO)ene and HO+(DO)yne complexes, which involve O-H(D)π interactions, have been analyzed using the MP2 level of the multi-component molecular orbital method (MC_MP2), which can incorporate the nuclear quantum effects of light nuclei, such as protons and deuterons. The MC_MP2 calculations revealed that DO replacement reduced the interaction energies of the complexes and induced changes in geometrical parameters. In addition, natural energy decomposition analysis (NEDA) revealed a strong correlation between the H/D isotope effects on the H/Dπ distances and on each energy component.
View Article and Find Full Text PDFSynthetic Aggregates and Bituminous Materials Based on Industrial Waste.
Materials (Basel)
December 2024
National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Str., 400293 Cluj-Napoca, Romania.
The transition to a circular economy requires new materials and products with new production designs, technologies, and processes. In order to create new materials with physico-chemical qualities suitable for application in the building materials engineering sector, stone dust and polymer waste-two environmentally hazardous industrial wastes-were combined in this study. The materials obtained were evaluated based on an analysis performed using the Micro-Deval test.
View Article and Find Full Text PDFPreclinical comparison of (radio)lanthanides using mass spectrometry and nuclear imaging techniques: biodistribution of lanthanide-based tumor-targeting agents and lanthanides in ionic form.
Eur J Nucl Med Mol Imaging
December 2024
Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland.
Purpose: With the growing interest in exploring radiolanthanides for nuclear medicine applications, the question arises as to whether they are generally interchangeable without affecting a biomolecule's pharmacokinetic properties. The goal of this study was to investigate similarities and differences of four (radio)lanthanides simultaneously applied as complexes of biomolecules or in ionic form.
Methods: Inductively coupled plasma mass spectrometry (ICP-MS) was employed for the simultaneous detection of four lanthanides (Ln = lutetium, terbium, gadolinium and europium) in biological samples.
Construction of Pt─O Sites on Pt Nanoclusters in Silicalite-1 Zeolite for Efficient Catalytic Oxidation of Hydrogen Isotope Gases.
Small
December 2024
Institute of Materials, China Academy of Engineering Physics, Jiangyou, Sichuan, 621908, P. R. China.
The construction, use, and maintenance of tritium-related equipment will inevitably produce tritium-containing radioactive waste gas, and the production of efficient catalysts for tritium removal remains a difficult problem. Herein, silicalite-1 zeolite with entrapped Pt nanoclusters is skillfully post-oxidized at an appropriate temperature, building highly active Pt─O sites on the nanoclusters to achieve efficient oxidation of hydrogen isotopes at low temperatures. The designed Pt─O sites can directly participate in the oxidation reaction of hydrogen isotopes.
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