Exploring the microbial biotransformation of extraterrestrial material on nanometer scale

Autor(en)
Tetyana Milojevic, Denise Koelbl, Ludovic Ferriere, Mihaela Albu, Adrienne Kish, Roberta L. Flemming, Christian Koeberl, Amir Blazevic, Ziga Zebec, Simon K-M R. Rittmann, Christa Schleper, Marc Pignitter, Veronika Somoza, Mario P. Schimak, Alexandra N. Rupert
Abstrakt

Exploration of microbial-meteorite redox interactions highlights the possibility of bioprocessing of extraterrestrial metal resources and reveals specific microbial fingerprints left on extraterrestrial material. In the present study, we provide our observations on a microbial-meteorite nanoscale interface of the metal respiring thermoacidophile Metallosphaera sedula. M. sedula colonizes the stony meteorite Northwest Africa 1172 (NWA 1172; an H5 ordinary chondrite) and releases free soluble metals, with Ni ions as the most solubilized. We show the redox route of Ni ions, originating from the metallic Ni2+ of the meteorite grains and leading to released soluble Ni2+. Nanoscale resolution ultrastructural studies of meteorite grown M. sedula coupled to electron energy loss spectroscopy (EELS) points to the redox processing of Fe-bearing meteorite material. Our investigations validate the ability of M. sedula to perform the biotransformation of meteorite minerals, unravel microbial fingerprints left on meteorite material, and provide the next step towards an understanding of meteorite biogeochemistry. Our findings will serve in defining mineralogical and morphological criteria for the identification of metal-containing microfossils.

Organisation(en)
Institut für Biophysikalische Chemie, Department für Lithosphärenforschung, Institut für Physiologische Chemie, Department für Mikrobiologie und Ökosystemforschung
Externe Organisation(en)
Naturhistorisches Museum Wien (NHM), Graz Ctr Electron Microscopy, Museum national d'Histoire Naturelle, University of Western Australia, Max-Planck-Institut für marine Mikrobiologie
Journal
Scientific Reports
Band
9
Anzahl der Seiten
11
ISSN
2045-2322
DOI
https://doi.org/10.1038/s41598-019-54482-7
Publikationsdatum
12-2019
Peer-reviewed
Ja
ÖFOS 2012
106002 Biochemie, 106006 Biophysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/exploring-the-microbial-biotransformation-of-extraterrestrial-material-on-nanometer-scale(05720147-7ba6-463b-93dc-bc5d95df3a81).html