Did life originate from low-temperature areas of the Universe?

Abstract

The biological molecules delivered to Earth on the board of meteorites and comets were called one of the possible causes of the origin of life. Therefore, our understanding of the routes of formation of biomolecules in space should shed the light on the possibility of the existence of habitable extrasolar planets. The large abundance of organic molecules is found in the space regions with the lowest temperature. Different routes of the organics formation in these areas were suggested. In this article, we demonstrate that complex organic molecules same as important biological molecules can be formed due to the reaction of C atoms with the mantels of molecular ices covering refractory dust grains present in the interstellar medium (ISM). Having four valence electrons, C atoms act as glue joining simple non-organic molecules and converting them into organic matter. The formation of many molecules is barrierless and thus can happen at low temperature. The barrierless reaction C + NH3 + CO -> NH2CHCO attracts particular interest. The product of this reaction is an isomer of the central residue of a peptide chain and expected to be efficiently formed in the translucent molecular clouds. The polymerization of these molecules leads to the formation of proteins that according to some theories are life's first molecules. Considering a high abundance of atomic carbon in the ISM, we expect a high efficiency of the formation of a large variety of different organic molecules, and show why the amount of organic material formed by condensation of atomic carbon may be underestimated.

Submitted to Low Temperature Physics

References in corpus (9)

• Photochemistry and astrochemistry: photochemical pathways to interstellar complex organic molecules
• The evolution of amorphous hydrocarbons in the ISM: dust modelling from a new vantage point
• The largest oxigen bearing organic molecule repository
• Origin of the RNA World: The Fate of Nucleobases in Warm Little Ponds
• Atom addition reactions in interstellar ice analogues
• Modeling Complex Organic Molecules in dense regions: Eley-Rideal and complex induced reaction
• Experimental Characterization of the Energetics of Low-temperature Surface Reactions
• A cryogenic ice setup to simulate carbon atom reactions in interstellar ices
• Composite Interstellar Grains

Cited by in corpus (4)

• A pathway to peptides in space through the condensation of atomic carbon
• Formation of extraterrestrial peptides and their derivatives
• Infrared Spectra of Solid-State Ethanolamine: Laboratory Data in Support of JWST Observations
• Possibilities for methanogenic and acetogenic life in molecular cloud