Probable Pathways to Prebiotic Carbohydrates and Their Derivates Тезисы доклада
Конференция |
2008 ISSOL Meeting 24-29 авг. 2008 , Florence |
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Журнал |
Origins of Life and Evolution of Biospheres
ISSN: 0169-6149 , E-ISSN: 1573-0875 |
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Вых. Данные | Год: 2009, Том: 39, Номер: 3-4, Страницы: 262-263 Страниц : 2 | ||||
Ключевые слова | FORMALDEHYDE; MINERALS | ||||
Авторы |
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Организации |
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Реферат:
In this article we summarize and discuss the most significant experimental results on the plausible prebiotic synthesis of carbohydrates and other vitally important organic substances from carbohydrates as initial substrates for such synthesis. Carbohydrates and their derivates play an inestimable role in organic life since they constitute the building blocks of various biomolecules indispensable for the living organisms (DNA, RNA, ATF, cellulose, chitin, starch, etc.). Among carbohydrates the main emphasis is placed on ribose, since the “RNA-world” (Gesteland, 2003) is the most reasoned hypothesis on the prebiotic chemical evolution and origin of life. There are at least two points of view on the origin of first carbohydrates on Earth: (a) carbohydrates were synthesized in the interstellar space at low temperature under action of UV-irradiation or cosmic radiation and were delivered on Earth with comets and meteorites (Finley, 2004); (b) the prebiotic carbohydrates synthesis embodies the catalytic processes in the aqueous solutions of simple substances such as formaldehyde or glycolaldehyde (Pestunova, 2003; Weber, 1995). We support last hypothesis. The synthesis of monosaccharides from formaldehyde and lower carbohydrates (glycolaldehyde, glyceraldehyde, dihydroxyacetone) is catalyzed by different compounds such as natural minerals, phosphate and borate ions (Cairns-Smith, 1972; Pisch, 1995; Simonov, 2007). Ribose can be selectively synthesized from glycolaldehyde and glyceraldehyde in the presence of borate-containing minerals or Zn-proline complexes (Ricardo, 2004; Ingar, 2003). We demonstrated that lower carbohydrates necessary for the synthesis of monosaccharides can be formed in formaldehyde aqueous solutions under the action of UV-irradiation (Pestunova, 2005). We have shown (Simonov, 2007) that higher monosaccharides can be formed directly from formaldehyde in the course of the combined photochemical and catalytic reactions in plausible prebiotic conditions. Aminoacids and heterocycles can be obtained from carbohydrates and NH3 in the presence of thiols (Weber, 1995).
Библиографическая ссылка:
Pestunova O.
, Simonov A.
, Parmon V.
Probable Pathways to Prebiotic Carbohydrates and Their Derivates
Origins of Life and Evolution of Biospheres. 2009. V.39. N3-4. P.262-263. WOS РИНЦ
Probable Pathways to Prebiotic Carbohydrates and Their Derivates
Origins of Life and Evolution of Biospheres. 2009. V.39. N3-4. P.262-263. WOS РИНЦ
Идентификаторы БД:
Web of science | WOS:000267033300086 |
РИНЦ | 19434803 |
Цитирование в БД:
Пока нет цитирований