NDLI: Genome Organization and Localization of the pufLM Genes of the Photosynthesis Reaction Center in Phylogenetically Diverse Marine Alphaproteobacteria

Content Provider	PubMed Central
Author	Pradella, Silke Allgaier, Martin Hoch, Christa Päuker, Orsola Stackebrandt, Erko Irene, Wagner-döbler
Copyright Year	2004
Abstract	Genome organization, plasmid content and localization of the pufLM genes of the photosynthesis reaction center were studied by pulsed-field gel electrophoresis (PFGE) in marine phototrophic Alphaproteobacteria. Both anaerobic phototrophs (Rhodobacter veldkampii and Rhodobacter sphaeroides) and strictly aerobic anoxygenic phototrophs from the Roseobacter-Sulfitobacter-Silicibacter clade (Roseivivax halodurans, Roseobacter litoralis, Staleya guttiformis, Roseovarius tolerans, and five new strains isolated from dinoflagellate cultures) were investigated. The complete genome size was estimated for R. litoralis DSM6996T to be 4,704 kb, including three linear plasmids. All strains contained extrachromosomal elements of various conformations (linear or circular) and lengths (between 4.35 and 368 kb). In strain DFL-12, a member of a putative new genus isolated from a culture of the toxic dinoflagellate Prorocentrum lima, seven linear plasmids were found, together comprising 860 kb of genetic information. Hybridization with probes against the pufLM genes of the photosynthesis gene cluster after Southern transfer of the genomic DNAs showed these genes to be located on a linear plasmid of 91 kb in R. litoralis and on a linear plasmid of 120 kb in S. guttiformis, theoretically allowing their horizontal transfer. In all other strains, the pufLM genes were detected on the bacterial chromosome. The large number and significant size of the linear plasmids found especially in isolates from dinoflagellates might account for the metabolic versatility and presumed symbiotic association with eukaryotic hosts in these bacteria.
Related Links	http://dx.doi.org/10.1128/aem.70.6.3360-3369.2004
Ending Page	3369
Page Count	10
Starting Page	3360
File Format	PDF
ISSN	00992240
e-ISSN	10985336
Journal	Applied and Environmental Microbiology
Issue Number	6
Volume Number	70
Language	English
Publisher	American Society for Microbiology
Publisher Date	2004-06-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Biotechnology Food Science Ecology Applied Microbiology and Biotechnology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecology Food Science Applied Microbiology and Biotechnology Biotechnology

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