Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Más filtros

Banco de datos
Tipo del documento
País de afiliación
Intervalo de año de publicación
1.
Appl Environ Microbiol ; 75(7): 2046-56, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19201974

RESUMEN

The complete genomes of three strains from the phylum Acidobacteria were compared. Phylogenetic analysis placed them as a unique phylum. They share genomic traits with members of the Proteobacteria, the Cyanobacteria, and the Fungi. The three strains appear to be versatile heterotrophs. Genomic and culture traits indicate the use of carbon sources that span simple sugars to more complex substrates such as hemicellulose, cellulose, and chitin. The genomes encode low-specificity major facilitator superfamily transporters and high-affinity ABC transporters for sugars, suggesting that they are best suited to low-nutrient conditions. They appear capable of nitrate and nitrite reduction but not N(2) fixation or denitrification. The genomes contained numerous genes that encode siderophore receptors, but no evidence of siderophore production was found, suggesting that they may obtain iron via interaction with other microorganisms. The presence of cellulose synthesis genes and a large class of novel high-molecular-weight excreted proteins suggests potential traits for desiccation resistance, biofilm formation, and/or contribution to soil structure. Polyketide synthase and macrolide glycosylation genes suggest the production of novel antimicrobial compounds. Genes that encode a variety of novel proteins were also identified. The abundance of acidobacteria in soils worldwide and the breadth of potential carbon use by the sequenced strains suggest significant and previously unrecognized contributions to the terrestrial carbon cycle. Combining our genomic evidence with available culture traits, we postulate that cells of these isolates are long-lived, divide slowly, exhibit slow metabolic rates under low-nutrient conditions, and are well equipped to tolerate fluctuations in soil hydration.


Asunto(s)
Bacterias/genética , Bacterias/aislamiento & purificación , ADN Bacteriano/genética , Genoma Bacteriano , Microbiología del Suelo , Antibacterianos/biosíntesis , Transporte Biológico , Metabolismo de los Hidratos de Carbono , Cianobacterias/genética , ADN Bacteriano/química , Hongos/genética , Macrólidos/metabolismo , Datos de Secuencia Molecular , Nitrógeno/metabolismo , Filogenia , Proteobacteria/genética , Análisis de Secuencia de ADN , Homología de Secuencia
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA