RESUMEN
Xenorhabdus nematophila strain C2-3, which belongs to the family Enterobacteriaceae, was isolated from entomopathogenic nematodes collected in the Republic of Korea. Herein, we report a 4.38-Mbp draft genome sequence of X. nematophila strain C2-3, with a 43.6% G+C content. The RAST annotation analysis revealed 4,994 protein-coding sequences in the draft genome.
RESUMEN
Chryseobacterium sp. strain P1-3, harboring keratin degrading activity, has recently been isolated from poultry waste. Here, we report the 4.6-Mbp draft genome sequence of the keratinolytic bacterium with a G+C content of 37.0% and 4,087 protein-coding genes.
RESUMEN
Photorhabdus temperata is an entomopathogenic enterobacterium; it is a nematode symbiont that possesses pathogenicity islands involved in insect virulence. Herein, we constructed a P. temperata M1021 cosmid library in Escherichia coli XL1-Blue MRF` and obtained 7.14 × 105 clones. However, only 1020 physiologically active clones were screened for insect virulence factors by injection of each E. coli cosmid clone into Galleria mellonella and Tenebrio molitor larvae. A single cosmid clone, PtC1015, was consequently selected due to its characteristic virulent properties, e.g., loss of body turgor followed by death of larvae when the clone was injected into the hemocoel. The sequence alignment against the available sequences in Swiss-Prot and NCBI databases, confirmed the presence of the mcf gene homolog in the genome of P. temperata M1021 showing 85% homology and 98% query coverage with the P. luminescens counterpart. Furthermore, a 2932 amino acid long Mcf protein revealed limited similarity with three protein domains. The N-terminus of the Mcf encompassed consensus sequence for a BH3 domain, the central region revealed similarity to toxin B, and the C-terminus of Mcf revealed similarity to the bacterial export domain of ApxIVA, an RTX-like toxin. In short, the Mcf toxin is likely to play a role in the elimination of insect pests, making it a promising model for use in the agricultural field.
Asunto(s)
Proteínas Bacterianas , Toxinas Bacterianas , Insecticidas , Photorhabdus , Secuencia de Aminoácidos , Animales , Proteínas Bacterianas/genética , Proteínas Bacterianas/aislamiento & purificación , Proteínas Bacterianas/toxicidad , Toxinas Bacterianas/genética , Toxinas Bacterianas/aislamiento & purificación , Toxinas Bacterianas/toxicidad , Cósmidos , Escherichia coli/genética , Insecticidas/aislamiento & purificación , Insecticidas/toxicidad , Larva/efectos de los fármacos , Datos de Secuencia Molecular , Mariposas Nocturnas/efectos de los fármacos , Filogenia , Tenebrio/efectos de los fármacos , Factores de Virulencia/genética , Factores de Virulencia/aislamiento & purificación , Factores de Virulencia/toxicidadRESUMEN
Photorhabdus temperata strain M1021 is an entomopathogenic bacterium belonging to the family Enterobacteriaceae and is symbiotically associated with nematodes. The draft genome sequence of P. temperata strain M1021 consists of 5,598,253 bp with a G+C content of 43.7%, and it has 6,120 protein-coding genes.
