Abstract:
:Little is known about the rate of emergence of de novo genes, what their initial properties are, and how they spread in populations. We examined wild yeast populations (Saccharomyces paradoxus) to characterize the diversity and turnover of intergenic ORFs over short evolutionary timescales. We find that hundreds of intergenic ORFs show translation signatures similar to canonical genes, and we experimentally confirmed the translation of many of these ORFs in laboratory conditions using a reporter assay. Compared with canonical genes, intergenic ORFs have lower translation efficiency, which could imply a lack of optimization for translation or a mechanism to reduce their production cost. Translated intergenic ORFs also tend to have sequence properties that are generally close to those of random intergenic sequences. However, some of the very recent translated intergenic ORFs, which appeared <110 kya, already show gene-like characteristics, suggesting that the raw material for functional innovations could appear over short evolutionary timescales.
journal_name
Genome Resjournal_title
Genome researchauthors
Durand É,Gagnon-Arsenault I,Hallin J,Hatin I,Dubé AK,Nielly-Thibault L,Namy O,Landry CRdoi
10.1101/gr.239822.118subject
Has Abstractpub_date
2019-06-01 00:00:00pages
932-943issue
6eissn
1088-9051issn
1549-5469pii
gr.239822.118journal_volume
29pub_type
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