Search results for "Rec A Recombinases"

showing 6 items of 6 documents

Multilocus sequence analysis of the central clade of the genus Vibrio by using the 16S rRNA, recA, pyrH, rpoD, gyrB, rctB and toxR genes.

2009

The central clade of the genus Vibrio, also called the Vibrio core group, comprises six species that are tightly related (DNA–DNA reassociation values are very close to 70 % for most species pairs). Identification of novel strains to the species level within this group is troublesome and results are quite often dependent on the methodology employed. Therefore, this group represents an excellent framework to test the robustness of multilocus sequence analysis (MLSA) not only for inferring phylogeny but also as an identification tool without the need for DNA–DNA hybridization assays. The genes selected, 16S rRNA, recA, pyrH, rpoD, gyrB, rctB and toxR, were amplified by direct PCR from 44 Vibr…

DNA BacterialSequence analysisMolecular Sequence DataSigma FactorBiologyMicrobiologyBacterial ProteinsPhylogeneticsVibrionaceaeTransferasesRNA Ribosomal 16SCladeGeneEcology Evolution Behavior and SystematicsPhylogenyVibrioGeneticsBase CompositionGeneral MedicineSequence Analysis DNARibosomal RNA16S ribosomal RNAbiology.organism_classificationVibrioDNA-Binding ProteinsRec A RecombinasesDNA GyraseTranscription FactorsInternational journal of systematic and evolutionary microbiology
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Description of Enterovibrio nigricans sp. nov., reclassification of Vibrio calviensis as Enterovibrio calviensis comb. nov. and emended description o…

2009

Eleven strains of halophilic, facultative anaerobes isolated from healthy and diseased Dentex dentex and Sparus aurata (bony fishes) cultured in Spanish Mediterranean fisheries have been studied by a polyphasic approach that included a wide phenotypic characterization, DNA-DNA hybridization and phylogenetic analysis using 16S rRNA, recA and rpoD gene sequences. All strains were phylogenetically related to Enterovibrio species and Vibrio calviensis. On the basis of sequence analysis and DNA-DNA hybridization data, eight of the strains were identified as Enterovibrio coralii. The remaining three strains formed a tight, independent clade in all sequence analyses and showed less than 70 % DNA-D…

DNA BacterialMolecular Sequence DataVibrionaceaeSigma FactorDNA RibosomalMicrobiologyMicrobiologyVibrionaceaePhylogeneticsRNA Ribosomal 16SSequence Homology Nucleic AcidAnimalsCluster AnalysisPhylogenyEcology Evolution Behavior and SystematicsGeneticsbiologyPhylogenetic treeNucleic Acid HybridizationDentex dentexDNA-Directed RNA PolymerasesSequence Analysis DNAGeneral MedicineRibosomal RNAbiology.organism_classification16S ribosomal RNAVibrioBacterial Typing TechniquesPerciformesRec A RecombinasesSpainTaxonomy (biology)International Journal of Systematic and Evolutionary Microbiology
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An MLSA approach for the taxonomic update of the Splendidus clade, a lineage containing several fish and shellfish pathogenic Vibrio spp.

2016

A multilocus sequence analysis was undertaken in order to redefine the Splendidus clade of the genus Vibrio, a large group of species containing several pathogenic members that affect fish and shellfish, and are difficult to identify through both phenotypic and genotypic approaches. The study included analysis of partial sequences of recA, gyrB, mreB, rpoD and pyrH genes, as well as the 16S rRNA gene. Seventeen type strain species were included that were complemented with other reference strains and a collection of isolates tentatively identified as members of this clade, as well as a set of other Vibrio species. The clade was well defined and stable in all analyses, and was confirmed to co…

DNA Bacterial0301 basic medicineVibrio cyclitrophicusSequence analysisLineage (evolution)030106 microbiologyZoologySigma FactorApplied Microbiology and BiotechnologyMicrobiologyMicrobiologyFish Diseases03 medical and health sciencesTransferasesRNA Ribosomal 16SAnimalsCladePhylogenyEcology Evolution Behavior and SystematicsShellfishShellfishVibrioBase SequencebiologyStrain (biology)FishesSubcladeDNA-Directed RNA PolymerasesSequence Analysis DNAbiology.organism_classification16S ribosomal RNAOstreidaeBacterial Typing TechniquesRec A RecombinasesDNA GyraseSeasonsMultilocus Sequence TypingSystematic and Applied Microbiology
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Chromatin modifiers and recombination factors promote a telomere fold-back structure, that is lost during replicative senescence.

2020

Telomeres have the ability to adopt a lariat conformation and hence, engage in long and short distance intra-chromosome interactions. Budding yeast telomeres were proposed to fold back into subtelomeric regions, but a robust assay to quantitatively characterize this structure has been lacking. Therefore, it is not well understood how the interactions between telomeres and non-telomeric regions are established and regulated. We employ a telomere chromosome conformation capture (Telo-3C) approach to directly analyze telomere folding and its maintenance in S. cerevisiae. We identify the histone modifiers Sir2, Sin3 and Set2 as critical regulators for telomere folding, which suggests that a dis…

TelomeraseProtein Folding:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::DNA-Binding Proteins::Rad52 DNA Repair and Recombination Protein [Medical Subject Headings]:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Fungal Proteins::Saccharomyces cerevisiae Proteins [Medical Subject Headings]Gene ExpressionYeast and Fungal ModelsArtificial Gene Amplification and ExtensionQH426-470BiochemistryPolymerase Chain ReactionChromosome conformation captureHistonesCromatina0302 clinical medicineSirtuin 2Macromolecular Structure AnalysisSilent Information Regulator Proteins Saccharomyces cerevisiaeCellular Senescence:Organisms::Eukaryota::Fungi::Yeasts::Saccharomyces::Saccharomyces cerevisiae [Medical Subject Headings]0303 health sciencesChromosome BiologyEukaryota:Phenomena and Processes::Genetic Phenomena::Genetic Processes::DNA Replication [Medical Subject Headings]TelomereSubtelomere:Anatomy::Cells::Cellular Structures::Intracellular Space::Cell Nucleus::Cell Nucleus Structures::Intranuclear Space::Chromosomes::Chromosome Structures::Telomere [Medical Subject Headings]Chromatin3. Good healthChromatinCell biologyNucleic acidsTelomeres:Phenomena and Processes::Cell Physiological Phenomena::Cell Physiological Processes::Cell Cycle::Cell Division::Telomere Homeostasis [Medical Subject Headings]Experimental Organism SystemsDaño del ADNEpigeneticsResearch ArticleSenescenceDNA Replication:Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Amidohydrolases::Histone Deacetylases [Medical Subject Headings]Chromosome Structure and FunctionProtein StructureSaccharomyces cerevisiae ProteinsSaccharomyces cerevisiaeBiologyResearch and Analysis MethodsHistone DeacetylasesChromosomes03 medical and health sciencesSaccharomycesModel Organisms:Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Transferases::One-Carbon Group Transferases::Methyltransferases [Medical Subject Headings]:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Intracellular Signaling Peptides and Proteins::Sirtuins::Sirtuin 2 [Medical Subject Headings]:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Fungal Proteins::Saccharomyces cerevisiae Proteins::Silent Information Regulator Proteins Saccharomyces cerevisiae [Medical Subject Headings]DNA-binding proteinsGenetics:Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Recombinases::Rec A Recombinases::Rad51 Recombinase [Medical Subject Headings]Molecular Biology TechniquesMolecular Biology030304 developmental biologyCromosomasSenescencia celularOrganismsFungiBiology and Life SciencesProteinsTelomere HomeostasisCell BiologyDNAMethyltransferasesG2-M DNA damage checkpointProteína recombinante y reparadora de ADN Rad52YeastTelomereRad52 DNA Repair and Recombination ProteinRepressor ProteinsAnimal Studies:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Transcription Factors::Repressor Proteins [Medical Subject Headings]DNA damageRad51 RecombinaseHomologous recombination030217 neurology & neurosurgeryTelómeroDNA DamagePLoS Genetics
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Plasmids in the aphid endosymbiont Buchnera aphidicola with the smallest genomes. A puzzling evolutionary story

2006

Buchnera aphidicola, the primary endosymbiont of aphids, has undergone important genomic and biochemical changes as an adaptation to intracellular life. The most important structural changes include a drastic genome reduction and the amplification of genes encoding key enzymes for the biosynthesis of amino acids by their translocation to plasmids. Molecular characterization through different aphid subfamilies has revealed that the genes involved in leucine and tryptophan biosynthesis show a variable fate, since they can be located on plasmids or on the chromosome in different lineages. This versatility contrasts with the genomic stasis found in three distantly related B. aphidicola strains …

GeneticsRecombination GeneticSubfamilybiologyfood and beveragesChromosomeGeneral Medicinebiochemical phenomena metabolism and nutritionbiology.organism_classificationGenomeEvolution MolecularRec A RecombinasesPlasmidBuchneraAphidsGeneticsAnimalsLeucineAmino AcidsBuchneraSymbiosisGeneBacteriaGenome BacterialPlasmids
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Bacteriophage GIL01 gp7 interacts with host LexA repressor to enhance DNA binding and inhibit RecA-mediated auto-cleavage

2015

The SOS response in Eubacteria is a global response to DNA damage and its activation is increasingly associated with the movement of mobile genetic elements. The temperate phage GIL01 is induced into lytic growth using the host's SOS response to genomic stress. LexA, the SOS transcription factor, represses bacteriophage transcription by binding to a set of SOS boxes in the lysogenic promoter P1. However, LexA is unable to efficiently repress GIL01 transcription unless the small phage-encoded protein gp7 is also present. We found that gp7 forms a stable complex with LexA that enhances LexA binding to phage and cellular SOS sites and interferes with RecA-mediated auto-cleavage of LexA, the ke…

Gene Expression Regulation ViralSOS responsebacteriophagesTranscription GeneticvirusesRepressorBacillus PhagesBiologybakteriofagitBacteriophage03 medical and health sciencesSOS Response (Genetics)Viral ProteinsBacterial ProteinsLysogenic cycleGeneticsSOS responsePromoter Regions GeneticSOS Response GeneticsTranscription factor030304 developmental biologyGenetics0303 health sciences030306 microbiologyLexA repressorGene regulation Chromatin and EpigeneticsSerine Endopeptidasesta1182DNAbiochemical phenomena metabolism and nutritionbiology.organism_classification3. Good healthCell biologyRepressor Proteinsenzymes and coenzymes (carbohydrates)Rec A RecombinasesLytic cyclebacteriaRepressor lexAProtein BindingNucleic Acids Research
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