A model of photophosphorylation of ADP to ATP under UV and blue light with the use of substances available in the prebiotic period of evolution is proposed. It is shown that the photoactive pigments of flavin and pterin nature formed along with polyamino acids during thermal synthesis of "proteinoids" from a mixture of amino acids initiate the process of photophosphorylation of ADP to ATP. Photophosphorylation occurs on proteinoid-silicate matrices of two types: (1) in the microspheres formed of proteinoids in the presence of polysilicic acid and (2) on the matrices obtained by adsorption of proteinoids on silicate particles.