Primitive Dark-Phase Cycle of Photosynthesis at the Origin of Life
Simple phosphorylation, isomerization, and aldolisation reactions starting from glyceraldehyde have the potential to lead to the synthesis of pre-ribonucleotide polymers through a primitive form of the Calvin cycle (dark phase of photosynthesis) involving the unusual formation of phospho-nonulose phosphate and phospho-deculose phosphate, as key intermediates. These reactions involve activated phosphates which are generated from schreibersite minerals, geochemically available in Hadean times.
- Bryant DE, Greenfield D, Walshaw RD, Johnson BRG, Herschy B, Smith C, Pasek MA, Telford R, Scowen I, Munshi T, Edwards HGM, Cousins CR, Crawford IA, Kee TP (2013) Hydrothermal modification of the Sikhote-Alin iron meteorite under low pH geothermal environments. A plausibly prebiotic route to activated phosphorus on the early Earth. Geochim Cosmochim Acta 109:90–112CrossRefGoogle Scholar
- Stincone A, Prigione A, Cramer T, Wamelink MM, Campbell K, Cheung E, Olin-Sandoval V, Grüning NM, Krüger A, Tauqeer Alam M, Keller MA, Breitenbach M, Brindle KM, Rabinowitz JD, Ralser M (2015) The return of metabolism: biochemistry and physiology of the pentose phosphate pathway. Biol Rev Camb Philos Soc 90:927–963CrossRefPubMedGoogle Scholar