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Montmorillonite-Catalysed Formation of RNA Oligomers: The Possible Role of Catalysis in the Origins of Life
James P. Ferris
Philosophical Transactions: Biological Sciences
Vol. 361, No. 1474, Conditions for the Emergence of Life on the Early Earth (Oct. 29, 2006), pp. 1777-1786
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/20209769
Page Count: 10
You can always find the topics here!Topics: Montmorillonite, RNA, Oligomers, Monomers, Catalysis, Prebiotics, Nucleotides, Catalysts, Pyrimidines, Purines
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Large deposits of montmorillonite are present on the Earth today and it is believed to have been present at the time of the origin of life and has recently been detected on Mars. It is formed by aqueous weathering of volcanic ash. It catalyses the formation of oligomers of RNA that contain monomer units from 2 to 30-50. Oligomers of this length are formed because this catalyst controls the structure of the oligomers formed and does not generate all possible isomers. Evidence of sequence-, regio- and homochiral selectivity in these oligomers has been obtained. Postulates on the role of selective versus specific catalysts on the origins of life are discussed. An introduction to the origin of life is given with an emphasis on reaction conditions based on the recent data obtained from zircons 4.0-4.5 Ga.
Philosophical Transactions: Biological Sciences © 2006 Royal Society