Primary transcriptome analysis reveals importance of IS elements for the shaping of the transcriptional landscape of Bordetella pertussis

0494878 - MBÚ 2019 RIV US eng J - Článek v odborném periodiku
Amman, F. - D'Halluin, A. - Antoine, R. - Huot, L. - Bíbová, Ilona - Keidel, Kristina - Slupek, S. - Bouquet, P. - Coutte, L. - Caboche, S. - Locht, C. - Večerek, Branislav - Hot, D.
Primary transcriptome analysis reveals importance of IS elements for the shaping of the transcriptional landscape of Bordetella pertussis.
RNA biology. Roč. 15, č. 7 (2018), s. 967-975. ISSN 1547-6286. E-ISSN 1555-8584
Grant CEP: GA ČR(CZ) GF16-34825L; GA MZd(CZ) NV16-30782A; GA MŠMT(CZ) EE2.3.20.0055; GA MŠMT(CZ) EE2.3.30.0003
Institucionální podpora: RVO:61388971
Klíčová slova: bordetella pertussis * insertion sequence * transcriptome
Obor OECD: Microbiology
Impakt faktor: 5.477, rok: 2018

Bordetella pertussis is the causative agent of whooping cough, a respiratory disease still considered as a major public health threat and for which recent re-emergence has been observed. Constant reshuffling of Bordetella pertussis genome organization was observed during evolution. These rearrangements are essentially mediated by Insertion Sequences (IS), a mobile genetic elements present in more than 230 copies in the genome, which are supposed to be one of the driving forces enabling the pathogen to escape from vaccine-induced immunity.Here we use high-throughput sequencing approaches (RNA-seq and differential RNA-seq), to decipher Bordetella pertussis transcriptome characteristics and to evaluate the impact of IS elements on transcriptome architecture. Transcriptional organization was determined by identification of transcription start sites and revealed also a large variety of non-coding RNAs including sRNAs, leaderless mRNAs or long 3 and 5UTR including seven riboswitches. Unusual topological organizations, such as overlapping 5- or 3-extremities between oppositely orientated mRNA were also unveiled. The pivotal role of IS elements in the transcriptome architecture and their effect on the transcription of neighboring genes was examined. This effect is mediated by the introduction of IS harbored promoters or by emergence of hybrid promoters. This study revealed that in addition to their impact on genome rearrangements, most of the IS also impact on the expression of their flanking genes. Furthermore, the transcripts produced by IS are strain-specific due to the strain to strain variation in IS copy number and genomic context.

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Trvalý link: http://hdl.handle.net/11104/0287937