Whole genome sequencing reveals a novel CRISPR system in industrial Clostridium acetobutylicum.
J Ind Microbiol Biotechnol
; 41(11): 1677-85, 2014 Nov.
Article
em En
| MEDLINE
| ID: mdl-25217846
ABSTRACT
Clostridium acetobutylicum is an important organism for biobutanol production. Due to frequent exposure to bacteriophages during fermentation, industrial C. acetobutylicum strains require a strong immune response against foreign genetic invaders. In the present study, a novel CRISPR system was reported in a C. acetobutylicum GXAS18-1 strain by whole genome sequencing, and several specific characteristics of the CRISPR system were revealed as follows (1) multiple CRISPR loci were confirmed within the whole bacterial genome, while only one cluster of CRISPR-associated genes (Cas) was found in the current strain; (2) similar leader sequences at the 5' end of the multiple CRISPR loci were identified as promoter elements by promoter prediction, suggesting that these CRISPR loci were under the control of the same transcriptional factor; (3) homology analysis indicated that the present Cas genes shared only low sequence similarity with the published Cas families; and (4) concerning gene similarity and gene cluster order, these Cas genes belonged to the csm family and originated from the euryarchaeota by horizontal gene transfer.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Clostridium acetobutylicum
/
Repetições Palindrômicas Curtas Agrupadas e Regularmente Espaçadas
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Ind Microbiol Biotechnol
Assunto da revista:
BIOTECNOLOGIA
/
MICROBIOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article