NDLI: Differential gene retention as an evolutionary mechanism to generate biodiversity and adaptation in yeasts

Content Provider	PubMed Central
Author	Morel, Guillaume Sterck, Lieven Swennen, Dominique Marina, Marcet-houben Onesime, Djamila Levasseur, Anthony Jacques, Noémie Mallet, Sandrine Couloux, Arnaux Labadie, Karine Amselem, Joëlle Jean-marie, Beckerich Bernard, Henrissat Peer, Yves Van De Patrick, Wincker Souciet, Jean-luc Gabaldón, Toni Tinsley, Colin R. Serge, Casaregola
Copyright Year	2015
Abstract	The evolutionary history of the characters underlying the adaptation of microorganisms to food and biotechnological uses is poorly understood. We undertook comparative genomics to investigate evolutionary relationships of the dairy yeast Geotrichum candidum within Saccharomycotina. Surprisingly, a remarkable proportion of genes showed discordant phylogenies, clustering with the filamentous fungus subphylum (Pezizomycotina), rather than the yeast subphylum (Saccharomycotina), of the Ascomycota. These genes appear not to be the result of Horizontal Gene Transfer (HGT), but to have been specifically retained by G. candidum after the filamentous fungi–yeasts split concomitant with the yeasts’ genome contraction. We refer to these genes as SRAGs (Specifically Retained Ancestral Genes), having been lost by all or nearly all other yeasts, and thus contributing to the phenotypic specificity of lineages. SRAG functions include lipases consistent with a role in cheese making and novel endoglucanases associated with degradation of plant material. Similar gene retention was observed in three other distantly related yeasts representative of this ecologically diverse subphylum. The phenomenon thus appears to be widespread in the Saccharomycotina and argues that, alongside neo-functionalization following gene duplication and HGT, specific gene retention must be recognized as an important mechanism for generation of biodiversity and adaptation in yeasts.
Related Links	http://dx.doi.org/10.1038/srep11571
Starting Page	11571
File Format	PDF
ISSN	20452322
e-ISSN	20452322
Journal	Scientific Reports
Volume Number	5
Language	English
Publisher	Nature Publishing Group
Publisher Date	2015-06-01
Access Restriction	Open
Rights Holder	Nature Publishing Group
Subject Keyword	Science and technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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