Enigmatic, ultrasmall, uncultivated Archaea
| Autor: | Brian D. Dill, Gregory J. Dick, Luis R. Comolli, Nathan C Verberkmoes, Brett J. Baker, Robert L. Hettich, Jillian F. Banfield, Doug Hyatt, Miriam Land, Loren Hauser |
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| Rok vydání: | 2010 |
| Předmět: |
Genetics
DNA Replication Proteomics Multidisciplinary biology Transcription Genetic Archaeal Proteins Cell Cycle Molecular Sequence Data Biological Sciences biology.organism_classification Genome Archaea Archaeal Richmond Mine acidophilic nanoorganisms Species Specificity Metagenomics Phylogenetics Crenarchaeota Genome Archaeal Biofilms Protein Biosynthesis Nanoarchaeota Nanoarchaeum equitans Genome Bacterial |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America. 107(19) |
| ISSN: | 1091-6490 |
| Popis: | Metagenomics has provided access to genomes of as yet uncultivated microorganisms in natural environments, yet there are gaps in our knowledge—particularly for Archaea—that occur at relatively low abundance and in extreme environments. Ultrasmall cells (Crenarchaeota than Euryarchaeota , up to 21% of genes have the highest sequence identity to bacterial genes, and 12 belong to clusters of orthologous groups that were previously exclusive to bacteria. A small subset of 3D cryo-electron tomographic reconstructions clearly show penetration of the ARMAN cell wall and cytoplasmic membranes by protuberances extended from cells of the archaeal order Thermoplasmatales . Interspecies interactions, the presence of a unique internal tubular organelle [Comolli, et al. (2009) ISME J 3:159–167], and many genes previously only affiliated with Crenarchaea or Bacteria indicate extensive unique physiology in organisms that branched close to the time that Cren - and Euryarchaeotal lineages diverged. |
| Databáze: | OpenAIRE |
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