Boreskov

OP‐12nanoparticles of polysilicic acid (diameter 200 nm). In addition to proteinoid, containingabiogenic flavin and pteridine pigments we investigated as photosensitizers the preparationsof protoporphyrin‐IX, riboflavin, 6,7‐dicarboxypterin as well as melanoidins formed byheating of an equimolar mixture of glycine with ribose. Electron donor used in experimentswas Na ‐ 2 EDTA and the electron acceptor was atmospheric oxygen.The emerged supramolecular organo‐mineral matrix sensitized photophosphorylation ofADP to ATP under the action of UVA light (Hg‐lamp, max 365 nm, active zone from 290 to380 nm was cut by glass filters). All the samples were equalized by the absorption at 365 nm.The analysis of photophosphorylation in the presence of the above mentioned pigments as apart of organo‐silicate matrix showed that the most effective were flavin‐conjugatedproteinoids as well as melanoidins (20% and 18%, respectively). Protoporphyrin‐IX, riboflavinand 6,7‐dicarboxypterin were in this reaction were less efficient. In the control samplescontaining a suspension of silicon oxide nanoparticles without pigments, or solutions ofpigments in the absence of nanoparticles of silicon oxide, no phosphorylation was observed.Considering the possible physico‐chemical mechanism of the process, it is necessary to takeinto account the interaction of the adsorbed pigments‐sensitizers with silicate colloidalparticles and, consequently, change of their electrochemical characteristics.The presence on the primitive Earth of photoactivated supramolecular matrices,apparently, was an important prerequisite for the occurrence of various processes ofprebiological evolution, including the process of phosphorylation with the formation of ATP.Supported by the Program of Basic Research № 25 of the Presidium of Russian Academyof Sciences and Russian Foundation for Basic Research. Grant 11‐04‐01007‐а.49