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Volume 9, Issue 6

Evidence of horizontal gene transfer within in 19 018 whole-genome spp. isolates: a global phylogenetic analysis Open Access

Abstract

The PorB porins are the major pore-forming proteins in the genus . The trimeric PorB porins consist of 16 highly conserved transmembrane domains that form an amphipathic β-sheet connected by short periplasmic turns and eight extracellular hydrophilic loops. These loops are immunogenic and also play an important role in mediating antimicrobial influx. This study sought to (i) characterize the variations in Neisserial loop 3(355–438 bp) associated with intermediate resistance to penicillin/tetracycline and (ii) evaluate if there was evidence of horizontal gene transfer in any of the loops. We collated an integrated database consisting of 19 018 spp. genomes – 17 882 , 114 and 1022 commensal spp. To identify the alleles, a gene-by-gene approach (chewBBACA) was employed. To evaluate the presence of recombination events, the Recombination Detection Programme (RDP4) was used. In total, 3885 alleles were detected. Paralogues were identified in 17 isolates. Putative recombination was identified in loop regions. Intraspecies recombination among isolates and interspecies recombination between and commensal spp., and and were identified. Here, we present a large-scale study of 19 018 isolates to describe recombination and variation in the porB gene. Importantly, we found putative recombination in loop regions between the pathogenic and non-pathogenic spp. These findings suggest the need for pheno- and genotypic surveillance of antimicrobial susceptibility in commensal spp. to prevent the emergence of AMR in the pathogenic . This article contains data hosted by Microreact.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): commensal Neisseria , Neisseria , phylogenetics , PorB1a , Porb1b and porin
Funding
This study was supported by the:
  • SOFI 2021 grant—“PReventing the Emergence of untreatable STIs via radical Prevention” (PRESTIP).
    • Principle Award Recipient: ChrisKenyon
© 2023 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2023-06-09
2024-05-03
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Evidence of horizontal gene transfer within porB in 19 018 whole-genome Neisseria spp. isolates: a global phylogenetic analysis
M Gen 9, 001041 (2023); https://doi.org/10.1099/mgen.0.001041
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