Cited by 72Origins and Evolution of LifePaleontology and Stratigraphy of FossilsGeological and Geochemical Analysis

The stability of some selected amino acids under attempted redox constrained hydrothermal conditions

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Andersson, Eva, Holm, Nils G.·2000·Origins of life and evolution of the biosphere

Abstract

In order to evaluate the stability of aspartic acid, serine, leucine, and alanine under redox buffered hydrothermal conditions, a series of experiments have been performed. The pyrite-pyrrhotite-magnetite (PPM) mineral assemblage was used in the experimental systems in order to constrain the oxygen fugacity. Likewise, the K-feldspar-muscovite-quartz (KMQ) assemblage was added to control the hydrogen ion activity during the experiments. The purpose was to compare the relative stabilities in buffered and unbuffered experiments. The experiments were conducted at 200 degrees C and 50 bar in Teflon coated autoclaves. Glycine, which was not present initially, started to appear at an early stage in the experimental systems and is believed to be the result of decomposition of serine. Similarly, the increase in relative abundance of alanine is likely to be the result of decomposition of serine. Decomposition rates of leucine, alanine and aspartic acid were found to be lower in experiments containing the redox buffer assemblage pyrite-pyrrhotite-magnetite than in non-redox buffered experiments. The decomposition rate of serine was higher in buffered experiments, which indicates that a transformation pathway via dehydration of serine to dehydroalanine followed by reduction to alanine is promoted by reducing conditions.

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  • Amino acid synthesis is very likely to occur under the circumstances of tectonic fault zones.

    “An example for such a process is the synthesis of amino acids which is very likely to occur under the given circumstances [12,13,14].”

    From Selection of Prebiotic Molecules in Amphiphilic Environments (2017) · cites this paper as [13]

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Research works printed but not linked: 2

  1. Andersson, E., Simoneit, B. R. T. and Holm, N. G.: 1999, Appl. Geochem. (in press).
  2. Kawahata, H. and Ishizuka, T.: 1989, Proc. Ocean Drill. Prog., Sci. Results 111, 215.

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Authors
Andersson, E., & Holm, N. G.
Affiliations
Stockholm University (SE)
Venue
Origins of life and evolution of the biosphere
Published
2000-01
Volume
30
Issue
1
Pages
9-23
ISSN
  • 0169-6149 (ISSN-L)
  • 1573-0875
OpenAlex
W1674984745
Cited by
72
References
41
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 2 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 4 · 2015: 8 · 2014: 3 · 2013: 5 · 2012: 5
FWCI
1.98
Type
journal article
Language
en
Open access
Locations
  • Origins of Life and Evolution of Biospheres (publishedVersion)
  • PubMed (publishedVersion)
Funders
Royal Swedish Academy of Sciences
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
Keywords
amino acid stability, aspartic acid, leucine, alanine, glycine formation, redox buffering, oxygen fugacity, hydrogen ion activity, hydrothermal conditions, dehydroalanine, prebiotic chemistry, origin of life
MeSH terms
Amino Acids, Hot Temperature, Models, Chemical, Oxidation-Reduction

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