Marsarchaeota are an aerobic archaeal lineage abundant in geothermal iron oxide microbial mats.

Nature Microbiology
Zackary J JayWilliam P Inskeep

Abstract

The discovery of archaeal lineages is critical to our understanding of the universal tree of life and evolutionary history of the Earth. Geochemically diverse thermal environments in Yellowstone National Park provide unprecedented opportunities for studying archaea in habitats that may represent analogues of early Earth. Here, we report the discovery and characterization of a phylum-level archaeal lineage proposed and herein referred to as the 'Marsarchaeota', after the red planet. The Marsarchaeota contains at least two major subgroups prevalent in acidic, microaerobic geothermal Fe(III) oxide microbial mats across a temperature range from ~50-80 °C. Metagenomics, single-cell sequencing, enrichment culturing and in situ transcriptional analyses reveal their biogeochemical role as facultative aerobic chemoorganotrophs that may also mediate the reduction of Fe(III). Phylogenomic analyses of replicate assemblies corresponding to two groups of Marsarchaeota indicate that they branch between the Crenarchaeota and all other major archaeal lineages. Transcriptomic analyses of several Fe(III) oxide mat communities reveal that these organisms were actively transcribing two different terminal oxidase complexes in situ and genes comprisi...Continue Reading

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Citations

Aug 23, 2019·Microbial Ecology·Yihua SunMeng Li
Mar 1, 2019·Proceedings of the National Academy of Sciences of the United States of America·Bojk A BerghuisStephen R Quake
Apr 7, 2019·Nature Communications·Ghader BashiriColin J Jackson
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Sep 29, 2020·Frontiers in Microbiology·Dayu ZouMeng Li
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Dec 7, 2018·Proceedings of the National Academy of Sciences of the United States of America·Zhirui ZengPaula V Welander
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Jan 22, 2021·FEMS Microbiology Reviews·April M LewisRobert M Kelly
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Nov 26, 2021·Microbes and Environments·Katsuhiro AsamatsuKatsunori Yanagawa

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Datasets Mentioned

BETA
PRJNA362583
GS0045212

Methods Mentioned

BETA
single-cell sequencing
scanning electron microscopy
Illumina sequencing
Confocal Microscopy

Software Mentioned

blastp
R package dbscan
RAxML
INS
Prokka
ALIGN
MAFFT
trimAL
SPAdes
JSpecies

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