The first bricks of life were on Earth 3.8 billion years ago!

Les briques de base composant les protéines d'aujourd'hui étaient déjà présentes il y a plus de 3,8 milliards d'années. © JohanSwanepoel, Adobe Stock

How did life and the first organic molecules come from primitive prebiotic soup? A new study of real proteins takes a small step in understanding our origins.

And the question of originRise Life on Earth has long been a fundamental question that is still unresolved. How primitive life came to be “Primitive Soup” What formed the oceans 4 billion years ago?

Leading path Formation of molecules Remains one of the great mysteries of biology. The basis of this process may remain Peptides as well as Proteins. However, the main factor that makes life unsustainable seems to be the ability to handle energy. It is one of the definitions of life: the ability to store and use energy, whatever it may be.

Oxidation-reduction reactions based on life on Earth

However, the basic biological reactions that take place within living cells are oxidation-reduction reactions that involve the transfer of electrons, thereby providing the required energy. This observation suggests that oxidation-reduction reactions should be one of the first actions achieved by all. The first forms of life. Understanding the molecular evolution responsible for the stimulation of oxidation-reduction reactions will help to unravel the mystery of the origin of life.

In this context, the presence of reactions involving a transfer of electrons Metals Seems to be an important point in the environment. In fact, metals seem to be the most effective chemical elements in the transfer of electrons and are often involved in oxidation-reduction reactions. Researchers at Rutgers University in the United States have shown interest in the structure of metal-associated proteins, suggesting that they may be a good starting point for many organisms’ functions. These structures may even form the basis of the first biological activity in the early stagesEvolution of life. A simple outline with the essential energy function, which would later be diversified.

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So the researchers discovered the evolution of these particular proteins, which contain metallic elements. Seems to contain these proteins Basic bricks Repetitive findings. Moreover, the configurations of these basic diagrams show that all of these proteins are from a single or very small ancestor.

Building blocks before assembly of the first proteins

Results of a study published in Scientific progress, Therefore, suggests the use of peptides that make up real proteins to facilitate the transfer of electrons, a step that is essential for living organisms. The basic elements for the required energy function, so they would be widely reused and adapted to a variety of biological functions, which explains why we see the same structure in all the functions of living things today.

However, it does contain peptidesAmino acids, Which means that these were already in the “primitive soup”. Researchers also suggest that the first biologically active peptides existed 3.8 billion years ago, before the assembly of the first proteins.

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