Document Detail

Organics in chimneys and water samples from deep-sea hydrothermal systems: implications for sub-vent biosphere.
MedLine Citation:
PMID:  14676368     Owner:  NASA     Status:  MEDLINE    
Searching for life in extreme terrestrial environments can be a model of that for extraterrestrial life. Submarine hydrothermal system is one of promising sites for the frontier of life on the earth. Here seawater and vent chimnies were collected from deep-sea hydrothermal vents at Suiyo Seamount, Izu-bonin arc, Pacific Ocean as a part of Archaean Park Project. Pure seawater sample of 300 degrees C (purity>97%) could be collected. Dissolved and total hydrolyzable amino acids were determined by ion-exchange HPLC, and their enantiomeric ratio was measured by reversed-phase HPLC for the first time. Glycine and serine were two most abundant amino acids, followed by other proteinous amino acids such as alanine, glutamic acid and aspartic acid. Non-proteinous amino acids were detected as minor constituents. Most of the amino acids detected were of the L-form. Thus amino acids of abiotic origin were quite minor, and most of the amino acids detected were formed biologically. These results, together with analytical results of the vent chimney samples, suggest that there is active microbial activities near the hydrothermal systems.
Tsukasa Horiuchi; Kensei Kobayashi; Yoshinori Takano; Katsumi Marumo; Miwako Nakashima; Akihiko Yamagishi; Jun-ichiro Ishibashi; Tetsuro Urabe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Uchū Seibutsu Kagaku     Volume:  17     ISSN:  0914-9201     ISO Abbreviation:  Biol. Sci. Space     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-12-16     Completed Date:  2008-07-16     Revised Date:  2009-06-04    
Medline Journal Info:
Nlm Unique ID:  100972048     Medline TA:  Biol Sci Space     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  190-1     Citation Subset:  S    
Department of Chemistry and Biotechnology, Yokohama National University.
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MeSH Terms
Amino Acids / analysis,  chemistry*
Hot Temperature*
Pacific Ocean
Seawater / chemistry*,  microbiology
Water Microbiology*
Reg. No./Substance:
0/Amino Acids

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