Other
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000oleb...30..539w&link_type=abstract
Origins of Life and Evolution of the Biosphere, v. 30, Issue 6, p. 539-548 (2000).
Other
1
Evolution Of Methyl Transfer, Formaldehyde, Prebiotic, Reductive Methylation
Scientific paper
An hypothesis is presented for the prebiotic origin of methyl groups and the evolution of methyl transfer reactions in living cells. This hypothesis, described in terms of prebiotic and early biotic chemical evolution, is based on experimental observations in our lab and in those of others, and on the mechanisms of enzymatic methyl transfer reactions that occur in living cells. Of particular interest is our demonstration of the reductive methylation of ethanolamine and glycine in aqueous solution by excess formaldehyde. These reactions, involving prebiotic compounds and conditions, are mechanistically analogous to the de novo origin of methyl groups in modern cells by reduction of methylene tetrahydrofolate. Furthermore, modern cellular methyl transfers from S-adenosylmethionine to amine nitrogen may involve formaldehyde as an intermediate and subsequent reductive methylation, analogous to the prebiotic chemistry observed herein.
Eilders Lon L.
Patel Bipin P.
Sims Michael
Waddell Thomas G.
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