Studying Prokaryotic Communities in Iron Depositing Hot Springs (IDHS): Implication for Early Mars HabitabilityWe speculate that both external and intracellular iron precipitate in iron-tolerant CB might be involved in oxidative stress suppression shown by [9]. Significant differences are apparent between a set of proteins involved in the maintenance of Fe homeostasis and oxidative stress protection in iron-tolerant and fresh-water and marine CB. Correspondingly, these properties may help to make iron-tolerant CB as dominant organisms in IDHS and probably on early Earth and Mars. Further comparative analyses of hot springs metagenomes and the genomes of iron-tolerant microbes versus fresh-water/marine ones may point out to different habitable zones on early Mars.
Document ID
20100010835
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Sarkisova, S. A. (NASA Johnson Space Center Houston, TX, United States)
Tringe, S. G. (Department of Energy United States)
Thomas-Keprta, K. L. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
Allen, C. c. (NASA Johnson Space Center Houston, TX, United States)
Garrison, D. H. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
McKay, David S. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
Brown, I. I. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)