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	2011/06
形態種別	学術論文
査読	査読有り
標題	Mineral-enhanced hydrothermal oligopeptide formation at the second time scale
執筆形態	共著
掲載誌名	Astrobiology
掲載区分	国外
出版社・発行元	Corresponding author
巻・号・頁	11(5),pp.461-469
著者・共著者	◎Kunio Kawamura, Hitoshi Takeya, Takao Kushibe, Yuka Koizumi
概要	Here, we show that enhancement of hydrothermal oligopeptide elongation by naturally occurring minerals was successfully verified for the first time by using a mineral-mediated hydrothermal flow reactor system (MMHF). MMHF consists of a narrow tubular reactor packed with mineral particles, and the enhancement or inhibitory activities of 10 types of naturally occurring minerals were successfully evaluated for an elongation reaction from (Ala)4 to (Ala)5 and higher oligopeptides in the absence of condensation reagents. It was unexpected that calcite and dolomite facilitated the elongation from (Ala)4 to (Ala)5 and higher oligopeptides with 28% yield at pH 7, while tourmaline, galena, apatite, mica, sphalerite, quartz, chalcopyrite, and pyrite did not show enhancement activities. These facts suggest the importance of carbonate minerals for the accumulation of peptide in primitive Earth environments.