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The Effect of the Presence of Amino Acids on the Precipitation of Inorganic Chemical-Garden Membranes: Biomineralization at the Origin of Life.
Borrego-Sánchez, Ana; Gutiérrez-Ariza, Carlos; Sainz-Díaz, C Ignacio; Cartwright, Julyan H E.
Afiliación
  • Borrego-Sánchez A; Instituto Andaluz de Ciencias de la Tierra (CSIC-University of Granada), Armilla, 18100 Granada Spain.
  • Gutiérrez-Ariza C; Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Campus de Cartuja s/n, 18071 Granada, Spain.
  • Sainz-Díaz CI; Instituto Andaluz de Ciencias de la Tierra (CSIC-University of Granada), Armilla, 18100 Granada Spain.
  • Cartwright JHE; Instituto Andaluz de Ciencias de la Tierra (CSIC-University of Granada), Armilla, 18100 Granada Spain.
Langmuir ; 38(34): 10538-10547, 2022 08 30.
Article en En | MEDLINE | ID: mdl-35974697
ABSTRACT
If life developed in hydrothermal vents, it would have been within mineral membranes. The first proto-cells must have evolved to manipulate the mineral membranes that formed their compartments in order to control their metabolism. There must have occurred a biological takeover of the self-assembled mineral structures of the vents, with the incorporation of proto-biological molecules within the mineral membranes to alter their properties for life's purposes. Here, we study a laboratory analogue of this process chemical-garden precipitation of the amino acids arginine and tryptophan with the metal salt iron chloride and sodium silicate. We produced these chemical gardens using different methodologies in order to determine the dependence of the morphology and chemistry on the growth conditions, as well as the effect of the amino acids on the formation of the iron-silicate chemical garden. We compared the effects of having amino acids initially within the forming chemical garden, corresponding to the internal zones of hydrothermal vents, or else outside, corresponding to the surrounding ocean. The characterization of the formed chemical gardens using X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis, and scanning electron microscopy demonstrates the presence of amino acids in these structures. The growth method in which the amino acid is initially in the tablet with the iron salt is that which generated chemical gardens with more amino acids in their structures.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Respiraderos Hidrotermales / Compuestos Inorgánicos Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2022 Tipo del documento: Article

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Respiraderos Hidrotermales / Compuestos Inorgánicos Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2022 Tipo del documento: Article