Literature DB >> 26314576

A Model of Isotope Separation in Cells at the Early Stages of Evolution.

A V Melkikh1, A O Bokunyaeva2.   

Abstract

The separation of the isotopes of certain ions can serve as an important criterion for the presence of life in the early stages of its evolution. A model of the separation of isotopes during their transport through the cell membrane is constructed. The dependence of the selection coefficient on various parameters is found. In particular, it is shown that the maximum efficiency of the transport of ions corresponds to the minimum enrichment coefficient. At the maximum enrichment, the efficiency of the transport system approaches ½. Calculated enrichment coefficients are compared with experimentally obtained values for different types of cells, and the comparison shows a qualitative agreement between these quantities.

Keywords:  Chemical potentials difference; Early stages of evolution; Efficiency of active transport; Protocells

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Year:  2015        PMID： 26314576     DOI： 10.1007/s11084-015-9463-0

Source DB:  PubMed          Journal:  Orig Life Evol Biosph        ISSN： 0169-6149            Impact factor:   1.950


  12 in total

1.  Early Archean serpentine mud volcanoes at Isua, Greenland, as a niche for early life.

Authors:  Marie-Laure Pons; Ghylaine Quitté; Toshiyuki Fujii; Minik T Rosing; Bruno Reynard; Frederic Moynier; Chantal Douchet; Francis Albarède
Journal:  Proc Natl Acad Sci U S A       Date:  2011-10-17       Impact factor: 11.205

2.  Origin of the directed movement of protocells in the early stages of the evolution of life.

Authors:  Alexey V Melkikh; Oksana I Chesnokova
Journal:  Orig Life Evol Biosph       Date:  2012-07-08       Impact factor: 1.950

3.  Models of active transport of ions in biomembranes of various types of cells.

Authors:  Alexey V Melkikh; Vladimir D Seleznev
Journal:  J Theor Biol       Date:  2005-01-25       Impact factor: 2.691

4.  Model of active transport of ions in biomembranes based on ATP-dependent change of height of diffusion barriers to ions.

Authors:  Alexey V Melkikh; Vladimir D Seleznev
Journal:  J Theor Biol       Date:  2006-04-28       Impact factor: 2.691

5.  Model of active transport of ions in archaea cells.

Authors:  A V Melkikh; V D Seleznev
Journal:  Bull Math Biol       Date:  2008-10-28       Impact factor: 1.758

Review 6.  Mechanisms and models of the active transport of ions and the transformation of energy in intracellular compartments.

Authors:  Alexey V Melkikh; Vladimir D Seleznev
Journal:  Prog Biophys Mol Biol       Date:  2012-05-11       Impact factor: 3.667

7.  Evidence for life on Earth before 3,800 million years ago.

Authors:  S J Mojzsis; G Arrhenius; K D McKeegan; T M Harrison; A P Nutman; C R Friend
Journal:  Nature       Date:  1996-11-07       Impact factor: 49.962

8.  Comparison of measured and modeled variations in piñon pine leaf water isotopic enrichment across a summer moisture gradient.

Authors:  Elise Pendall; David G Williams; Steven W Leavitt
Journal:  Oecologia       Date:  2005-10-13       Impact factor: 3.225

9.  The chemical logic of a minimum protocell.

Authors:  H J Morowitz; B Heinz; D W Deamer
Journal:  Orig Life Evol Biosph       Date:  1988       Impact factor: 1.950

10.  Oxygen and hydrogen isotopic ratios in plant cellulose.

Authors:  S Epstein; P Thompson; C J Yapp
Journal:  Science       Date:  1977-12-23       Impact factor: 47.728
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