Hydrolysis of Phosphate Esters Catalyzed by Inorganic Iron Oxide Nanoparticles Acting as Biocatalysts

Astrobiology
Xiao-Lan Huang

Abstract

Phosphorus ester hydrolysis is one of the key chemical processes in biological systems, including signaling, free-energy transaction, protein synthesis, and maintaining the integrity of genetic material. Hydrolysis of this otherwise kinetically stable phosphoester and/or phosphoanhydride bond is induced by enzymes such as purple acid phosphatase. Here, I report that, as in previously reported aged inorganic iron ion solutions, the iron oxide nanoparticles in the solution, which are trapped in a dialysis membrane tube filled with the various iron oxides, significantly promote the hydrolysis of the various phosphate esters, including the inorganic polyphosphates, with enzyme-like kinetics. This observation, along with those of recent studies of iron oxide, vanadium pentoxide, and molybdenum trioxide nanoparticles that behave as mimics of peroxidase, bromoperoxidase, and sulfite oxidase, respectively, indicates that the oxo-metal bond in the oxide nanoparticles is critical for the function of these corresponding natural metalloproteins. These inorganic biocatalysts challenge the traditional concept of replicator-first scenarios and support the metabolism-first hypothesis. As biocatalysts, these inorganic nanoparticles with enzyme-...Continue Reading

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Citations

Mar 3, 2020·Frontiers in Bioengineering and Biotechnology·Peixia WangMinmin Liang
Feb 23, 2020·Sensors·Bhargav D Mansuriya, Zeynep Altintas
Apr 7, 2019·Journal of Colloid and Interface Science·Annaleise R KleinLudmilla Aristilde
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Apr 23, 2021·Chemistry : a European Journal·Frederico F MartinsAdrià Gil
Jul 18, 2019·Environmental Science & Technology·Biao WanYuanzhi Tang

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