Pan-genomic analysis of Corynebacterium amycolatum gives insights into molecular mechanisms underpinning the transition to a pathogenic phenotype

Autor: Hendor N. R. Jesus, Danilo J. P. G. Rocha, Rommel T. J. Ramos, Artur Silva, Bertram Brenig, Aristóteles Góes-Neto, Mateus M. Costa, Siomar C. Soares, Vasco Azevedo, Eric R. G. R. Aguiar, Luiz Martínez-Martínez, Alain Ocampo, Sana Alibi, Alexis Dorta, Luis G. C. Pacheco, Jesus Navas
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Frontiers in Microbiology, Vol 13 (2022)
Druh dokumentu: article
ISSN: 1664-302X
DOI: 10.3389/fmicb.2022.1011578
Popis: Corynebacterium amycolatum is a nonlipophilic coryneform which is increasingly being recognized as a relevant human and animal pathogen showing multidrug resistance to commonly used antibiotics. However, little is known about the molecular mechanisms involved in transition from colonization to the MDR invasive phenotype in clinical isolates. In this study, we performed a comprehensive pan-genomic analysis of C. amycolatum, including 26 isolates from different countries. We obtained the novel genome sequences of 8 of them, which are multidrug resistant clinical isolates from Spain and Tunisia. They were analyzed together with other 18 complete or draft C. amycolatum genomes retrieved from GenBank. The species C. amycolatum presented an open pan-genome (α = 0.854905), with 3,280 gene families, being 1,690 (51.52%) in the core genome, 1,121 related to accessory genes (34.17%), and 469 related to unique genes (14.29%). Although some classic corynebacterial virulence factors are absent in the species C. amycolatum, we did identify genes associated with immune evasion, toxin, and antiphagocytosis among the predicted putative virulence factors. Additionally, we found genomic evidence for extensive acquisition of antimicrobial resistance genes through genomic islands.
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