期刊
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
卷 79, 期 13, 页码 3974-3985出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.03821-12
关键词
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资金
- Gordon and Betty Moore Foundation Marine Microbial Genome Sequencing Project
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services (NIAD) [HHSN266200400042C]
- NSF OCE [0647633]
- Directorate For Geosciences
- Division Of Ocean Sciences [0647633] Funding Source: National Science Foundation
- Office of Integrative Activities
- Office Of The Director [1301765] Funding Source: National Science Foundation
The draft genome sequence of a single orange Beggiatoa (Candidatus Maribeggiatoa) filament collected from a microbial mat at a hydrothermal site in Guaymas Basin (Gulf of California, Mexico) shows evidence of extensive genetic exchange with cyanobacteria, in particular for sensory and signal transduction genes. A putative homing endonuclease gene and group I intron within the 23S rRNA gene; several group II catalytic introns; GyrB and DnaE inteins, also encoding homing endonucleases; multiple copies of sequences similar to the fdxN excision elements XisH and XisI (required for heterocyst differentiation in some cyanobacteria); and multiple sequences related to an open reading frame (ORF) (00024_0693) of unknown function all have close non-Beggiatoaceae matches with cyanobacterial sequences. Sequences similar to the uncharacterized ORF and Xis elements are found in other Beggiatoaceae genomes, a variety of cyanobacteria, and a few phylogenetically dispersed pleiomorphic or filamentous bacteria. We speculate that elements shared among filamentous bacterial species may have been exchanged in microbial mats and that some of them may be involved in cell differentiation.
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