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Photorhabdus luminescens is a symbiont of nematodes and a broad-spectrum insect pathogen. The complete genome sequence of strain TT01 is 5,688,987 base pairs (bp) long and contains 4,839 predicted protein-coding genes. Strikingly, it encodes a large number of adhesins, toxins, hemolysins, proteases and lipases, and contains a wide array of antibiotic(More)
BACKGROUND Flexible genomes facilitate bacterial evolution and are classically organized into polymorphic strain-specific segments called regions of genomic plasticity (RGPs). Using a new web tool, RGPFinder, we investigated plasticity units in bacterial genomes, by exhaustive description of the RGPs in two Photorhabdus and two Xenorhabdus strains,(More)
The bacterium Photorhabdus establishes a highly specific association with Heterorhabditis, its nematode host. Photorhabdus strains associated with Heterorhabditis bacteriophora or Heterorhabditis megidis were compared using a Photorhabdus DNA microarray. We describe 31 regions belonging to the Photorhabdus flexible gene pool. Distribution analysis of(More)
Erwinia amylovora strain CFBP1430 secretes a protein called HrpW in a Hrp-dependent manner. HrpW was detected in culture supernatant of the wild-type strain grown on solid inducing hrp medium. This protein shares structural similarities with elicitors of the hypersensitive response such as HrpN of Erwinia amylovora and PopA of Ralstonia solanacearum.(More)
Members of the genus Xenorhabdus are entomopathogenic bacteria that associate with nematodes. The nematode-bacteria pair infects and kills insects, with both partners contributing to insect pathogenesis and the bacteria providing nutrition to the nematode from available insect-derived nutrients. The nematode provides the bacteria with protection from(More)
BACKGROUND In sequencing the genomes of two Xenorhabdus species, we encountered a large number of sequence repeats and assembly anomalies that stalled finishing efforts. This included a stretch of about 12 Kb that is over 99.9% identical between the plasmid and chromosome of X. nematophila. RESULTS Whole genome restriction maps of the sequenced strains(More)
We identified two neighboring missense mutations in the chloroplast atpA gene which are responsible for the defect of ATP synthase assembly in the FUD16 mutant from Chlamydomonas reinhardtii. The two corresponding amino acid substitutions, Ile184-->Asn and Asn186-->Tyr, occurred at strictly conserved sites among the alpha and beta subunits of (C)F1(More)
In Erwinia amylovora, the dsp region, required for pathogenicity on the host plant but not for hypersensitive elicitation on tobacco, is separated from the hrp region by 4 kb. The genetic analysis reported in this paper showed that this 4kb region is not required for pathogenicity on pear seedlings. The environmental conditions allowing expression of a(More)
Insects are the largest group of animals on earth. Like mammals, virus, fungi, bacteria and parasites infect them. Several tissue barriers and defense mechanisms are common for vertebrates and invertebrates. Therefore some insects, notably the fly Drosophila and the caterpillar Galleria mellonella, have been used as models to study host-pathogen(More)
The free-living soil nematode Caenorhabditis elegans interacts with diverse microorganisms in its natural habitat. These microorganisms may serve as a food source or represent a harmful threat. As such, they constitute one of the most important ecological factors of the worm's natural environment. In this study, we examined the interaction between two(More)