RESUMO
BACKGROUND: Whole genome sequencing promises to revolutionize our ability to link genotypic and phenotypic variation in a wide range of model and non-model species. RESULTS: Here we describe the isolation and characterization of a novel mycobacteriophage named BGlluviae that grows on Mycobacterium smegmatis mc2155. BGlluviae normally produces turbid plaques but a spontaneous clear plaque was also recovered. The genomic DNA from pure populations of the BGlluviae phage and the clear plaque mutant were sequenced. A single substitution, at amino acid 54 (I to T), in the immunity repressor protein resulted in a clear plaque phenotype. CONCLUSIONS: This substitution is predicted to be located at the subunit interaction interface of the repressor protein, and thus prevents the establishment of lysogeny.
Assuntos
Substituição de Aminoácidos , Micobacteriófagos/genética , Mycobacterium smegmatis/virologia , Sequenciamento Completo do Genoma/métodos , Genoma Viral , Sequenciamento de Nucleotídeos em Larga Escala , Lisogenia , Modelos Moleculares , Micobacteriófagos/classificação , Micobacteriófagos/isolamento & purificação , Fenótipo , Filogenia , Conformação Proteica , Proteínas Virais/química , Proteínas Virais/genéticaRESUMO
We report here the complete genome sequences of 44 phages infecting Arthrobacter sp. strain ATCC 21022. These phages have double-stranded DNA genomes with sizes ranging from 15,680 to 70,707 bp and G+C contents from 45.1% to 68.5%. All three tail types (belonging to the families Siphoviridae, Myoviridae, and Podoviridae) are represented.
RESUMO
Bacteriophages AlleyCat, Edugator, and Guillsminger were isolated on Mycobacterium smegmatis mc2155 from enriched soil samples. All are members of mycobacteriophage subcluster K5, with genomes of 62,112 to 63,344 bp. Each genome contains 92 to 99 predicted protein-coding genes and one tRNA. Guillsminger is the first mycobacteriophage to carry an IS1380 family transposon.
