カワムラ　クニオ   KAWAMURA Kunio   川村　邦男    所属   広島修道大学  人間環境学部    職種   教授
言語種別	英語
発行・発表の年月	2010/08
形態種別	学術論文
査読	査読有り
標題	Temperature limit for the emergence of life-like system deduced from the prebiotic chemical kinetics under the hydrothermal conditions
執筆形態	単著
掲載誌名	Proceedings of the Twelfth International Conference
掲載区分	国外
出版社・発行元	Proceedings of the Twelfth International Conference on the Simulation and Synthesis of Living System
巻・号・頁	pp.33-44
概要	The RNA world hypothesis and the hydrothermal origin of life hypothesis are contradictory to maintain life-like systems for these two hypotheses to be compatible by the following two main reasons. First RNA molecules are too labile and second the biologically important interactions would not be effective at high temperatures. The assumption can be applied to the protein-based life-like systems. We have continuously investigated the stability and the chemical evolution of RNA- and protein-based life-like systems by using our hydrothermal- monitoring techniques. According to these data, it has been found that two viewpoints are essential to discuss the temperature limit of RNA and/or protein-based life-like systems on the primitive earth. First, the accumulation of biomolecules should be determined by both the formation and degradation rates. Second, the reaction rates of the primitive life-like systems should be evaluated from the viewpoint of enzymatic reaction rates.