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On the Plausibility of Pseudosugar Formation in Cometary Ices and Oxygen-rich Tholins.
Lavado, Nieves; Ávalos, Martín; Babiano, Reyes; Cintas, Pedro; Light, Mark E; Jiménez, José Luis; Palacios, Juan C.
Afiliación
  • Lavado N; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain. nlavador@gmail.com.
  • Ávalos M; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain.
  • Babiano R; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain. reyes@unex.es.
  • Cintas P; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain.
  • Light ME; Department of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
  • Jiménez JL; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain.
  • Palacios JC; Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, Avenida de Elvas s/n, E-06006, Badajoz, Spain.
Orig Life Evol Biosph ; 46(1): 31-49, 2016 Mar.
Article en En | MEDLINE | ID: mdl-26428515
We revisit herein the formation and structure of dihydroxy dioxanes, which can be obtained from prebiotically available precursors and can be regarded as primeval sugar surrogates. Previous studies dealing with the heterogeneous composition of interstellar bodies point to the existence of significant amounts of small polyalcohols along with oxygen-containing oligomers. Even though such derivatives did not give rise to nucleosides and oligonucleotides, nor they were incorporated into subsequent metabolic routes, molecular chimeras based on sugar-like species could be opportunistic scaffolds in pre-evolutionary scenarios. We could figure out that pseudosugars, assembled by hemiacetalic bonds from available precursors in both interstellar and terrestrial scenarios, were presumably more abundant than thought. Moreover, these species share some key features with naturally-occurring sugar rings, such as anomeric preferences, coordinating ability, and the prevalent occurrence of racemic compounds.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Meteoroides / Dioxanos / Carba-azúcares Idioma: En Revista: Orig Life Evol Biosph Asunto de la revista: BIOLOGIA / BIOLOGIA MOLECULAR Año: 2016 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Meteoroides / Dioxanos / Carba-azúcares Idioma: En Revista: Orig Life Evol Biosph Asunto de la revista: BIOLOGIA / BIOLOGIA MOLECULAR Año: 2016 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos