Chemists from the Netherlands created arbitrarily formed in an aqueous solution system, capable of self-replication and protometabolism. Under the light of the dye associated with other structural units of the growing fibers, catalyzed reaction of self-replication and growth of fibers. The results of a study published in Nature Chemistry.
For solving the mystery of the origin of life on Earth, scientists are trying to create artificial chemical systems that would have the most important features of the living: the self-replication, metabolism and compartmentalization (preserving the layout of the components of the system are close to each other). Metabolism, in particular, plays a critical role in the development from simple self-replicating systems to complex, reminiscent of living. Metabolism helps the replicators use more resources, and faster and more stable to grow.
The possibility of creation of replication systems with the metabolism already studied theoretically, but experimental knowledge is not yet sufficient. The complexity of their creation is that such systems should catalyze reaction how to copy itself and reactions associated with metabolism.
Guillermo Santiago Monreal (Monreal Guillermo Santiago) with colleagues from Groningen University have created cameralocation, able to spontaneously formed from complex mixtures and to grow exponentially under the action of light. The Replicator was a macrocycle of six organic molecules — structural units, that the oxidation associated with each other by disulfide bridges. Many replicators were able to self-organize into fibers, even at low concentrations.
To show behavior that is similar to the metabolism of living beings, the authors provided the replicators land, absorbing the light. Under the action of photon energy, using these organic plots are similar to cofactors in biochemical processes, the macrocycle was able to synthesize the precursors for the reactions of self-reproduction.
As the photoactive cofactor chromophores were used: rose Bengal and tetraphenylporphyrin. The dye with the Replicator was formed by chemical bonding, and excitation of such a macromolecule with the energy of light resulted in the formation of singlet oxygen, okinavskogo tirinya group of reagents for the formation of new macro-Replicator.