The Cryptocococcus extracellular vesicle transcriptome
Taheraly, A.; Maufrais, C.; Moyrand, F.; Coppee, J.-Y.; Colin, J.; Janbon, G.
Show abstract
Extracellular vesicles (EVs) are now recognized as key players in the biology of numerous organisms, including pathogenic fungi. However, studying EVs in these organisms remains challenging. The recent implementation of new protocols to purify EVs in the pathogenic yeast Cryptococcus neoformans has resulted in a more detailed description of their structure and protein composition. Although a few publications describing RNA molecules associated with EVs have already been published, we reasoned that these new protocols would be beneficial for gaining a deeper understanding of the EV transcriptome. We thus purified EVs and confirmed that some RNAs were associated with these EV extracts. Iodixanol gradient analyses also revealed that these RNAs co-sedimented with EVs. We then sequenced these RNAs in parallel with RNAs extracted from the very cells producing these EVs using different types of sequencing libraries. Our data confirm the presence of siRNAs and tRFs associated with EVs, some of which are enriched. We also identified some snoRNAs, which in Cryptococcus are mostly borne by coding gene or lncRNA introns.
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