Phosphate-related genomic islands as drivers of environmental adaptation in the streamlined marine alphaproteobacterial HIMB59.
mSystems
; 8(6): e0089823, 2023 Dec 21.
Article
em En
| MEDLINE
| ID: mdl-38054740
ABSTRACT
IMPORTANCE These results shed light on the evolutionary strategies of microbes with streamlined genomes to adapt and survive in the oligotrophic conditions that dominate the surface waters of the global ocean. At the individual level, these microbes have been subjected to evolutionary constraints that have led to a more efficient use of nutrients, removing non-essential genes named as "streamlining theory." However, at the population level, they conserve a highly diverse gene pool in flexible genomic islands resulting in polyclonal populations on the same genomic background as an evolutionary response to environmental pressures. Localization of these islands at equivalent positions in the genome facilitates horizontal transfer between clonal lineages. This high level of environmental genomic heterogeneity could explain their cosmopolitan distribution. In the case of the order HIMB59 within the class Alphaproteobacteria, two factors exert evolutionary pressure and determine this intraspecific diversity phages and the concentration of P in the environment.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Genoma Bacteriano
/
Alphaproteobacteria
Limite:
Humans
Idioma:
En
Revista:
MSystems
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Espanha