A cohabiting bacterium alters the spectrum of short RNAs secreted by Escherichia coli.
FEMS Microbiol Lett
; 365(24)2018 12 01.
Article
em En
| MEDLINE
| ID: mdl-30376063
ABSTRACT
Recently, it has been found that bacteria secrete short RNAs able to affect gene expression in eukaryotic cells, while certain mammalian microRNAs shape the gut microbiome altering bacterial transcriptome. The involvement of bacterial RNAs in communication with other bacteria is also expected, but has not been documented yet. Here, we compared the fractions of extremely short (12-22 nucleotides) RNAs secreted by Escherichia coli grown in a pure culture and jointly with bacteria of the Paenibacillus genus. Besides fragments of rRNAs and tRNAs, abundant in all samples, secreted oligonucleotides (exoRNAs) predominantly contained GC-rich fragments of messenger and antisense RNAs processed from regions with stable secondary structures. They differed in composition from oligonucleotides of intracellular fraction, where fragments of small regulatory RNAs were prevalent. Both fractions contained RNAs capable of forming complementary duplexes, while for exoRNA samples a higher percentage of 3Î-end modified RNAs and different endonuclease cleavage were detected. The presence of a cohabiting bacterium altered the spectrum of E. coli exoRNAs, indicating a population-dependent control over their composition. Possible mechanisms of this effect are discussed.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA Bacteriano
/
RNA Mensageiro
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RNA Antissenso
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Escherichia coli
Idioma:
En
Revista:
FEMS Microbiol Lett
Ano de publicação:
2018
Tipo de documento:
Article