Christa Schleper

TL;DR: Phylogenetic analysis of the amino acid sequences encoded by PCR fragments reveals several clades with affinity, sometimes only distant, to the putative RadA proteins of several species of Crenarcheota, including two most deeply branching archaeal radA genes.

TL;DR: This contribution assesses the main ecophysiological characteristics of methanogens and compare these to the environmental conditions of putative habitats in the Solar System, in particular Mars and icy moons and gives an outlook on the feasibility and the necessity of future astrobiological studies concerning methanogen.

TL;DR: It was found that there is a large and diverse group of uncultured Crenarchaeota that inhabit terrestrial hot springs with moderate temperatures and two of the lineages were given phenotypic characterization.

TL;DR: Thaumarchaeota represent a unique phylum within the domain Archaea that embraces ammonia-oxidizing organisms from soil, marine waters, and hot springs, as well as many lineages represented only by environmental sequences from virtually every habitat that has been screened.

TL;DR: Analysis of the araS promoter activity, and the mRNA and protein levels in S. solfataricus cells grown on different carbon sources showed that expression of the arabinose transporter gene cluster is highly regulated and dependent on the presence of arabinoses in the medium, confirming the earlier observation of a catabolite repression-like system in S.'sulfolobus solfatonicus.