مقاله Role of Ferrocyanides in the Prebiotic Synthesis of α-Amino Acids : تی پی بین

خلاصه مقاله

We investigated the synthesis of α-amino acids under possible prebiotic terrestrial conditions in the presence of dissolved iron (II) in a simulated prebiotic ocean. An aerosol-liquid cycle with a prebiotic atmosphere is shown to produce amino acids via Strecker synthesis with relatively high yields. However, in the presence of iron, the HCN was captured in the form of a ferrocyanide, partially inhibiting the formation of amino acids. We showed how HCN captured as Prussian Blue (or another complex compound) may, in turn, have served as the HCN source when exposed to UV radiation, allowing for the sustained production of amino acids in conjunction with the production of oxyhydroxides that precipitate as by-products. We conclude that ferrocyanides and related compounds may have played a significant role as intermediate products in the prebiotic formation of amino acids and oxyhydroxides, such as those that are found in iron-containing soils and that the aerosol cycle of the primitive ocean may have enhanced the yield of the amino acid production.

نویسندگان

Marta Ruiz-Bermejo [ Departamento de Evolución Molecular, Centro de Astrobiología [Instituto Nacional de Técnica Aeroespacial-Consejo Superior de Investigaciones Científicas (INTA-CSIC)], Carretera Torrejón-Ajalvir, Km 4, 28850, Torrejón de Ardoz, Madrid, Spain ]

Susana Osuna-Esteban [ Departamento de Evolución Molecular, Centro de Astrobiología [Instituto Nacional de Técnica Aeroespacial-Consejo Superior de Investigaciones Científicas (INTA-CSIC)], Carretera Torrejón-Ajalvir, Km 4, 28850, Torrejón de Ardoz, Madrid, Spain ]

María-Paz Zorzano [ Departamento de Instrumentación Avanzada, Centro de Astrobiología [Instituto Nacional de Técnica Aeroespacial-Consejo Superior de Investigaciones Científicas (INTA-CSIC)], Carretera Torrejón-Ajalvir, Km 4, 28850, Torrejón de Ardoz, Madrid, Spain ]

کلمات کلیدی

Prebiotic synthesis Ferrocyanides Amino acids Carboxylic acids Aerosol chemistry Strecker reaction

آدرس این مقاله

آدرس مستقیم دسترسی به این مقاله

مشخصات کنفرانس

مشاهده مقالات

Origins of Life and Evolution of Biospheres 2013

The origin and early evolution of life is an inseparable part of the discipline of Astrobiology. The journal Origins of Life and Evolution of Biospheres places special importance on this interconnection. While any scientific study which contributes to our understanding of the origins, evolution and distribution of life in the Universe is suitable for inclusion in the journal, some examples of important areas of interest are: prebiotic chemistry and the nature of Earth's early environment, self-replicating and self-organizing systems, the theory of the RNA world and of other possible precursor systems, and the problem of the origin of the genetic code. Early evolution of life - as revealed by elucidation of biochemical pathways, molecular phylogeny, the study of Precambrian sediments and fossils and of major innovations in microbial evolution - forms a second focus. The journal presents experimental papers, theoretical articles and authoritative literature reviews.

حوزه های تحت پوشش : Life Sciences, general, Astrophysics and Astroparticles, Earth Sciences, general, Astronomy, Observations and Techniques