Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

B (Biogeosciences) » B-AO Astrobiology & the Origin of Life

[B-AO01] Astrobiology

Tue. May 22, 2018 3:30 PM - 5:00 PM 102 (1F International Conference Hall, Makuhari Messe)

convener:Hikaru Yabuta(Hiroshima University, Department of Earth and Planetary Systems Science), Seiji Sugita(Department of Earth and Planetary Science, Graduate School of Science Sciece, The University of Tokyo), Misato Fukagawa(名古屋大学, 共同), Fujishima Kosuke(Tokyo Institute of Technology, Earth-Life Science Institute), Chairperson:Yabuta Hikaru(Hiroshima University), Sugita Seiji(東京大学大学院 理学系研究科)

4:40 PM - 4:55 PM

[BAO01-14] A simulation of polypeptide formation from oligopeptides in primordial earth hydrosphere

*Toratane Munegumi1 (1.Department of Science Education, Naruto University of Education)

Keywords:asparagine-comprising peptides, polypepties, heating reaction

Asparagine and aspartic acid might have transformed in the primordial hydrosphere of the earth as well as the pair of glutamine and glutaric acid. These amino acids seem to contribute to polypeptide, while simple amino acids: glycine and alanine easily form cyclic dipeptides not to reach long peptide chains. Asparagine-comprising or glutamine-comprising oligopeptides contribute some kinds of activation forms to lead polypeptides. The heating reactions of these peptides resulted in polypeptide formation with molecular weight up to about 5,000 Da in aqueous solutions. The new finding of polypeptide formation suggests a pathway of sequential polypeptides to evolve a diversity of polypeptides. The presentation will also show a pathway of asparagine-comprising dipeptides from alanyl alanine. The research proposes a scinario of polypeptide formation from simple amino acids.