Computer Science
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989oleb...19..143h&link_type=abstract
Origins of Life and Evolution of the Biosphere, Volume 19, Issue 2, pp.143-152
Computer Science
3
Scientific paper
It has been postulated that adsorption and surface catalysis, as well as repeated drying and wetting cycles, were essential in the synthesis, interconversion and co-evolution of phosphorylated molecules, including ‘energy-rich’ compounds. We have investigated the formation of pyrophosphate from phospho(enol)pyruvate and orthophosphate. The reaction occurred within hours at 37°C, required the adsorption of phospho(enol)pyruvate onto sedimented phosphate, exhibited Michaelian-like behavior and showed positive cooperativity with respect to divalent cation concentration. Thus in ‘mild’, near-equilibrium conditions, the de-solvated surfaces of phosphate crystals can catalyze the formation of pyrophosphate with a kinetic behavior similar to that found in contemporary enzymes. The experimental system we describe may represent a model for the prebiotic catalysis of transphosphorylations.
Hermes-Lima Marcelo
Vieyra Adalberto
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