Article (Scientific journals)
The taxonomy of the Trichophyton rubrum complex: a phylogenomic approach
Cornet, Luc; D'Hooge, Elizabet; Magain, Nicolas et al.
2021In Microbial Genomics
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Keywords :
Trichophyton rubrum; dermatophytes; phylogenomics; gene marker; fungi; mycopathology
Abstract :
[en] The medically relevant Trichophyton rubrum species complex has a variety of phenotypic presentations but shows relatively little genetic differences. Conventional barcodes, such as the internal transcribed spacer (ITS) region or the beta-tubulin gene, are not able to completely resolve the relationships between these closely related taxa. T. rubrum, T. soudanense and T. violaceum are currently accepted as separate species. However, the status of certain variants, including the T. rubrum morphotypes megninii and kuryangei and the T. violaceum morphotype yaoundei, remains to be deciphered. We conducted the first phylogenomic analysis of the T. rubrum species complex by studying 3105 core genes of 18 new strains from the BCCM/IHEM culture collection and nine publicly available genomes. Our analyses revealed a highly resolved phylogenomic tree with six separate clades. Trichophyton rubrum, T. violaceum and T. soudanense were confirmed in their status of species. The morphotypes T. megninii, T. kuryangei and T. yaoundei all grouped in their own respective clade with high support, suggesting that these morphotypes should be reinstituted to the species-level. Robinson-Foulds distance analyses showed that a combination of two markers (a ubiquitin-protein transferase and a MYB DNA-binding domain-containing protein) can mirror the phylogeny obtained using genomic data, and thus represent potential new markers to accurately distinguish the species belonging to the T. rubrum complex.
Research Center/Unit :
Sciensano
InBios - Integrative Biological Sciences - ULiège
Disciplines :
Microbiology
Author, co-author :
Cornet, Luc ;  Sciensano > BCCM/IHEM, Mycology and Aerobiology
D'Hooge, Elizabet;  Sciensano
Magain, Nicolas  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et gestion de la biodiversité
Stubbe, Dirk;  Sciensano
Packeu, Ann;  Sciensano
Baurain, Denis   ;  Université de Liège - ULiège > Département des sciences de la vie > Phylogénomique des eucaryotes
Becker, Pierre ;  Sciensano
 These authors have contributed equally to this work.
Language :
English
Title :
The taxonomy of the Trichophyton rubrum complex: a phylogenomic approach
Publication date :
November 2021
Journal title :
Microbial Genomics
eISSN :
2057-5858
Publisher :
Microbiology Society, London, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
BELSPO - Politique scientifique fédérale
F.R.S.-FNRS - Fonds de la Recherche Scientifique
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since 10 November 2021

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