Modelling of the Prebiotic Synthesis of Oligopeptides: Silicate Catalysts Help to Overcome the Critical Stage Full article
Journal |
Origins of Life and Evolution of Biospheres
ISSN: 0169-6149 , E-ISSN: 1573-0875 |
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Output data | Year: 1997, Volume: 27, Number: 4, Pages: 325-337 Pages count : 13 DOI: 10.1023/A:1006571800690 | ||||||||
Tags | AMINO-ACIDS; PREBIOLOGICAL PALEOATMOSPHERE; CHEMICAL EVOLUTION; HOT-SPRINGS; ORIGIN; LIFE; MONTMORILLONITE; STABILITY | ||||||||
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Funding (1)
1 | Russian Foundation for Basic Research | 93-03-4811 |
Abstract:
On the basis of experimental studies of the initial stages of glycine oligomerization in aqueous suspension of zeolite and kaolinite catalysts, a model is suggested for the prebiotic synthesis of oligopeptides from α-amino acids. The formation of linear dipeptides by hydrolysis of one amide bond in the cyclic piperazinedione intermediate (formed from glycine spontaneously) is found to be the critical stage of the reaction. This stage is base catalyzed and its rate increases when pH of the medium goes up. The linear glycyl-glycine yield rises under effect of hydroxyl anions generated from different sources including insoluble silicates and soluble sodium bicarbonate. During prebiotic evolution silicates capable of cation-exchange can serve as local sources of the hydroxyl anions which dramatically accelerate formation of linear dipeptides from cyclic ones. Oligopeptides of higher molecular weight are then easily formed from the linear dipeptides at neutral pH, even in the absence of catalysts or sources of energy (e.g. such as light). The described catalytic synthesis could occur in the proximity of submarine hydrothermal vents.
Cite:
Zamaraev K.I.
, Romannikov V.N.
, Salganik R.I.
, Wlassoff W.A.
, Khramtsov V.V.
Modelling of the Prebiotic Synthesis of Oligopeptides: Silicate Catalysts Help to Overcome the Critical Stage
Origins of Life and Evolution of Biospheres. 1997. V.27. N4. P.325-337. DOI: 10.1023/A:1006571800690 WOS Scopus РИНЦ
Modelling of the Prebiotic Synthesis of Oligopeptides: Silicate Catalysts Help to Overcome the Critical Stage
Origins of Life and Evolution of Biospheres. 1997. V.27. N4. P.325-337. DOI: 10.1023/A:1006571800690 WOS Scopus РИНЦ
Dates:
Accepted: | Sep 16, 1996 |
Published print: | Aug 1, 1997 |
Identifiers:
Web of science | WOS:A1997XL29800005 |
Scopus | 2-s2.0-0031471795 |
Elibrary | 13257677 |
Chemical Abstracts | 1997:536379 |
Chemical Abstracts (print) | 127:201691 |
PMID | 11536826 |
OpenAlex | W88549450 |