Due to its complex architecture and its differentness to others a new class of cell surface appendages was introduced: “Hamus” (plural: “Hami”, latin for hook, barb, fishing-rod; Moissl et al., 2005).
The entire, complex structure is formed by units of a single 120-k Da large protein.
In general, all studies of the model organism SM1 Euryarchaeon have provided insights into the properties of (cold-loving), naturally occurring Archaea, which have not been obtained in other systems or by laboratory pure cultures.
The SM1 Euryarchaeon is phylogenetically distinct (more than 20% difference in the 16S r RNA gene compared to other cultivated Archaea) and forms a separate branch within the ME-group (miscellaneous euryarchaeota group, MEG).The established method to enrich, or better harvest the SM1 Euryarchaeon from its natural biotope, allows a stable and reliable delivery of biomass for our research activities. gratis dating danmark Struer Very unusual for known Archaea and their biotopes, the SM1 Euryarchaeon predominates its biotope in the subsurface and could possible even suppress other Bacteria or Archaea in its close vicinity.The microbial diversity of the string-of-pearl community and of the biofilm are investigated using the recently developed .Finally, metagenome analysis (454 pyrosequencing and illumina HISeq 2000 (paired-end) of purified biofilms is performed to decipher the secret about function and metabolic capabilities of the SM1 Euryarchaeon.
Single community Regensburg
Due to the constant occurence in (sulfidic) springs in Europe and its appearance in hot spots a large ecological role of this group of organisms can be assumed.Two stable biotopes of the SM1 Euryarchaeon are located in close vicinity to Regensburg and accessible for scientific research at the Archaea center: The main spring of the Sippenauer Moor and the Muehlbacher Schwefelquelle.These analyses are a basis for the attempt to finally grow the SM1 Euryarchaeon as a pure culture in the laboratory.Compared to clean room environments on earth, the inner of the ISS is an even more ‘extreme’ habitat for microorganisms.Hence, it is plausible that microgravity and increased irradiation doses could have a selective pressure on the microbial community. Kasthuri Venkateswaran (NASA Jet Propulsion Laboratory, USA) Prof. Forward contamination: The contamination of extraterrestrial environments by terrestrial microorganisms or biomolecules.
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Interestingly, the microbial diversity onboard the ISS has previously been investigated by basic cultivation attempts or molecular approaches tailored to detection of Bacteria. Importantly, future missions set out to seek for extraterrestrial life should not be compromised as contaminants may complicate or preclude the search for indigenous extraterrestrial life.While the diversity of microorganisms in clean rooms shows a dependence on the microbial flora of the geographical location (Moissl et al., 2007), the ISS itself has no surrounding microbial environment.Instead, this isolated system, has been continuously inhabited by humans since November 2000.Unfortunately, the assembly of the hamus itself is still unclear.Based on the protein sequence the gene of the subunit could be identified, which, however, shows no homology to publicly available sequences.