NDLI: Enhanced photocatalytic performance of ZnS for reversible amination of -oxo acids by hydrothermal treatment.

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Enhanced photocatalytic performance of ZnS for reversible amination of -oxo acids by hydrothermal treatment.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Wei Li, Qiliang Liu, Xiaoyang Yang, Yanqiang Su, Wenhui
Description	Country affiliation: China Author Affiliation: Wang W ( CCMST, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China. wwang_ol@hit.edu.cn)
Abstract	To understand how life could have originated on early Earth, it is essential to know what biomolecules and metabolic pathways are shared by extant organisms and what organic compounds and their chemical reaction channels were likely to have been primordially available during the initial phase of the formation of prebiotic metabolism. In a previous study, we demonstrated for the first time the reversible amination of -oxo acids on the surface of photo-illuminated ZnS. The sulfide mineral is a typical component at the periphery of submarine hydrothermal vents which has been frequently argued as a very attractive venue for the origin of life. In this work, in order to simulate more closely the precipitation environments of ZnS in the vent systems, we treated newly-precipitated ZnS with hydrothermal conditions and found that its photocatalytic power was significantly enhanced because the relative crystallinity of the treated sample was markedly increased with increasing temperature. Since the reported experimental conditions are believed to have been prevalent in shallow-water hydrothermal vents of early Earth and the reversible amination of -oxo acids is a key metabolic pathway in all extant life forms, the results of this work provide a prototypical model of the prebiotic amino acid redox metabolism. The amino acid dehydrogenase-like chemistry on photo-irradiated ZnS surfaces may advance our understanding of the establishment of archaic non-enzymatic metabolic systems.
File Format	HTM / HTML
ISSN	01696149
Issue Number	4
Volume Number	42
e-ISSN	15730875
Journal	Origins of Life and Evolution of Biospheres
Language	English
Publisher	Springer
Publisher Date	2012-08-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Molecular Biology Discipline Biology Acids Chemistry Amino Acids Photochemical Processes Sulfides Zinc Compounds Analysis Amination Catalysis Electrochemistry Hydrothermal Vents Origin Of Life Oxidation-reduction Pyruvic Acid Radiation Effects Surface Properties Temperature X-ray Diffraction Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine Ecology, Evolution, Behavior and Systematics Space and Planetary Science

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