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Nitrosopumilus maritimus genome reveals unique mechanisms for nitrification and autotrophy in globally distributed marine crenarchaea
TLDR
The isolation of Candidatus “Nitrosopumilus maritimus” strain SCM1 is reported, revealing highly copper-dependent systems for ammonia oxidation and electron transport that are distinctly different from known ammonia-oxidizing bacteria.
Cultivation of a thermophilic ammonia oxidizing archaeon synthesizing crenarchaeol.
TLDR
The cultivation of a thermophilic nitrifier ('Candidatus Nitrosocaldus yellowstonii'), an autotrophic crenarchaeote growing up to 74 degrees C by aerobic ammonia oxidation, providing the first direct evidence for its synthesis by a thermophile.
Genomic analysis of the uncultivated marine crenarchaeote Cenarchaeum symbiosum
TLDR
The C. symbiosum genome was remarkably distinct from those of other known Archaea and shared many core metabolic features in common with its free-living planktonic relatives.
Cephalic expression and molecular characterization of Xenopus En-2.
TLDR
Comparison of amino acid sequences between the entire Xenopus En-2 and the Drosophila engrailed proteins confirms conservation of sequences inside as well as proximal to the homeobox and reveals a region of similarity towards the N terminus.
Microbial Diversity of Cryptoendolithic Communities from the McMurdo Dry Valleys, Antarctica
TLDR
The microbial biodiversity of selected cryptoendolithic communities is surveyed by analyzing clone libraries of rRNA genes amplified from environmental DNA in the McMurdo Dry Valleys of Antarctica.
Abundance of Ammonia-Oxidizing Archaea and Bacteria along an Estuarine Salinity Gradient in Relation to Potential Nitrification Rates
ABSTRACT Abundance of ammonia-oxidizing Archaea (AOA) was found to be always greater than that of ammonia-oxidizing Bacteria along an estuarine salinity gradient, and AOA abundance was highest at
Physiology and diversity of ammonia-oxidizing archaea.
TLDR
Comparative studies provide compelling evidence that the lineage of Archaea with which the AOA affiliate is sufficiently divergent to justify the creation of a novel phylum, the Thaumarchaeota.
Phylogenetic Screening of Ribosomal RNA Gene-Containing Clones in Bacterial Artificial Chromosome (BAC) Libraries from Different Depths in Monterey Bay
TLDR
A rapid technique was developed (ITS-LH-PCR) to identify and quantify ribosomal RNA (rRNA) gene-containing BAC clones in BAC libraries, and phylogenetic analyses of planktonic marine gamma Proteobacteria, Roseobacter, and Rhodospirillales species were refined.
Nitrosomonas Nm143-like ammonia oxidizers and Nitrospira marina-like nitrite oxidizers dominate the nitrifier community in a marine aquaculture biofilm.
Zero-discharge marine aquaculture systems are an environmentally friendly alternative to conventional aquaculture. In these systems, water is purified and recycled via microbial biofilters. Here,
Proteorhodopsin genes are distributed among divergent marine bacterial taxa
TLDR
Comparisons of PR-bearing genomic fragments recovered directly from planktonic bacteria inhabiting the California coast, the central Pacific Ocean, and waters offshore the Antarctica Peninsula indicate that PR genes are distributed among a variety of divergent marine bacterial taxa, including both α- and γ-proteobacteria.
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