July 7, 2019  |  

Comparative genomic analysis reveals genetic features related to the virulence of Bacillus cereus FORC_013.

Authors: Koo, Hyun-Jin and Ahn, Sojin and Chung, Han Young and Kim, Suyeon and Kim, Kwondo and Ryu, Sangryeol and Lee, Ju-Hoon and Choi, Sang Ho and Kim, Heebal

Bacillus cereus is well known as a gastrointestinal pathogen that causes food-borne illness. In the present study, we sequenced the complete genome of B. cereus FORC_013 isolated from fried eel in South Korea. To extend our understanding of the genomic characteristics of FORC_013, we conducted a comparative analysis with the published genomes of other B. cereus strains.We fully assembled the single circular chromosome (5,418,913 bp) and one plasmid (259,749 bp); 5511 open reading frames (ORFs) and 283 ORFs were predicted for the chromosome and plasmid, respectively. Moreover, we detected that the enterotoxin (NHE, HBL, CytK) induces food-borne illness with diarrheal symptom, and that the pleiotropic regulator, along with other virulence factors, plays a role in surviving and biofilm formation. Through comparative analysis using the complete genome sequence of B. cereus FORC_013, we identified both positively selected genes related to virulence regulation and 224 strain-specific genes of FORC_013.Through genome analysis of B. cereus FORC_013, we identified multiple virulence factors that may contribute to pathogenicity. These results will provide insight into further studies regarding B. cereus pathogenesis mechanism at the genomic level.

Journal: Gut pathogens
DOI: 10.1186/s13099-017-0175-z
Year: 2017

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