Evolution of Major Metabolic Innovations in the Precambiran

Details Evolution of Major Metabolic Innovations in the Precambiran Evolution of Major Metabolic Innovations in the Precambiran

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982orli...12...81b&link_type=abstract

Origins of Life, Volume 12, Issue 1, pp.81-91

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Scientific paper

A combination of the information on the metabolic capabilities of prokaryotes with a composite phylogenetic tree depicting an overview of prokaryote evolution based on the sequences of bacterial ferredoxin, 2Fe-2S ferredoxin, 5S ribosomal RNA, andc-type cytochromes shows three zones of major metabolic innovation in the Precambrian. The middle of these, which reflects the genesis of oxygenreleasing photosynthesis and aerobic respiration, links metabolic innovations of the anaerobic stem on the one hand and, on the other, proliferation of aerobic bacteria and the symbiotic associations leading to the eukaryotes. We consider especially those pathways where information on the structure of the enzymes is known.Halobacterium andThermoplasma (archaebacteria) do not belong to a totally independent line on the basis of the composite tree but branch from the eukaryote cytoplasmic line.

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