The effect of recombination on the evolution of a population of Neisseria meningitidis

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http://hdl.handle.net/10138/333237

Lähdeviite

MacAlasdair , N , Pesonen , M , Brynildsrud , O , Eldholm , V , Kristiansen , P A , Corander , J , Caugant , D A & Bentley , S D 2021 , ' The effect of recombination on the evolution of a population of Neisseria meningitidis ' , Genome Research , vol. 31 . https://doi.org/10.1101/gr.264465.120

Julkaisun nimi: The effect of recombination on the evolution of a population of Neisseria meningitidis
Tekijä: MacAlasdair, Neil; Pesonen, Maiju; Brynildsrud, Ola; Eldholm, Vegard; Kristiansen, Paul A.; Corander, Jukka; Caugant, Dominique A.; Bentley, Stephen D.
Tekijän organisaatio: Helsinki Institute for Information Technology
Jukka Corander / Principal Investigator
Department of Mathematics and Statistics
Biostatistics Helsinki
Päiväys: 2021-07
Kieli: eng
Sivumäärä: 11
Kuuluu julkaisusarjaan: Genome Research
ISSN: 1088-9051
DOI-tunniste: https://doi.org/10.1101/gr.264465.120
URI: http://hdl.handle.net/10138/333237
Tiivistelmä: Neisseria meningitidis (the meningococcus) is a major human pathogen with a history of high invasive disease burden, particularly in sub-Saharan Africa. Our current understanding of the evolution of meningococcal genomes is limited by the rarity of large-scale genomic population studies and lack of in-depth investigation of the genomic events associated with routine pathogen transmission. Here, we fill this knowledge gap by a detailed analysis of 2839 meningococcal genomes obtained through a carriage study of over 50,000 samples collected systematically in Burkina Faso, West Africa, before, during, and after the serogroup A vaccine rollout, 2009-2012. Our findings indicate that the meningococcal genome is highly dynamic, with highly recombinant loci and frequent gene sharing across deeply separated lineages in a structured population. Furthermore, our findings illustrate how population structure can correlate with genome flexibility, as some lineages in Burkina Faso are orders of magnitude more recombinant than others. We also examine the effect of selection on the population, in particular how it is correlated with recombination. We find that recombination principally acts to prevent the accumulation of deleterious mutations, although we do also find an example of recombination acting to speed the adaptation of a gene. In general, we show the importance of recombination in the evolution of a geographically expansive population with deep population structure in a short timescale. This has important consequences for our ability to both foresee the outcomes of vaccination programs and, using surveillance data, predict when lineages of the meningococcus are likely to become a public health concern.
Avainsanat: MULTIPLE SEQUENCE ALIGNMENT
MENINGOCOCCAL CARRIAGE
EPIDEMIC MENINGITIS
IDENTIFICATION
BELT
ASSOCIATION
SELECTION
ELEMENTS
IMPACT
MODEL
1184 Genetics, developmental biology, physiology
Vertaisarvioitu: Kyllä
Tekijänoikeustiedot: cc_by
Pääsyrajoitteet: openAccess
Rinnakkaistallennettu versio: publishedVersion


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