Membrane Lipid Composition and Amino Acid Excretion Patterns of Methanothermococcus okinawensis Grown in the Presence of Inhibitors Detected in the Enceladian Plume

Autor(en)
Ruth-Sophie Taubner, Lydia M. F. Baumann, Thorsten Bauersachs, Elisabeth L. Clifford, Barbara Mähnert, Barbara Reischl, Richard Seifert, Joern Peckmann, Simon K-M R. Rittmann, Daniel Birgel
Abstrakt

Lipids and amino acids are regarded as important biomarkers for the search for extraterrestrial life in the Solar System. Such biomarkers may be used to trace methanogenic life on other planets or moons in the Solar System, such as Saturn's icy moon Enceladus. However, little is known about the environmental conditions shaping the synthesis of lipids and amino acids. Here, we present the lipid production and amino acid excretion patterns of the methanogenic archaeon Methanothermococcus okinawensis after exposing it to different multivariate concentrations of the inhibitors ammonium, formaldehyde, and methanol present in the Enceladian plume. M. okinawensis shows different patterns of lipid and amino acids excretion, depending on the amount of these inhibitors in the growth medium. While methanol did not show a significant impact on growth, lipid or amino acid production rates, ammonium and formaldehyde strongly affected these parameters. These findings are important for understanding the eco-physiology of methanogens on Earth and have implications for the use of biomarkers as possible signs of extraterrestrial life for future space missions in the Solar System.

Organisation(en)
Department für Ökogenomik und Systembiologie, Department für Geodynamik und Sedimentologie, Department für Funktionelle und Evolutionäre Ökologie
Externe Organisation(en)
Universität Hamburg
Journal
Life
Band
9
Anzahl der Seiten
19
DOI
https://doi.org/10.3390/life9040085
Publikationsdatum
12-2019
Peer-reviewed
Ja
ÖFOS 2012
Mikrobiologie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/membrane-lipid-composition-and-amino-acid-excretion-patterns-of-methanothermococcus-okinawensis-grown-in-the-presence-of-inhibitors-detected-in-the-enceladian-plume(d8d0c928-b2b6-401d-91f0-bb37d276ee4f).html