期刊
YEAST
卷 28, 期 1, 页码 1-8出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/yea.1814
关键词
Candida albicans; dsRNA; RNAi; RNase assay; Argonaute; Dicer
资金
- National Institute of Dental and Craniofacial Research (NIH) [R21DE015749]
- NATIONAL INSTITUTE OF DENTAL &CRANIOFACIAL RESEARCH [R21DE015749] Funding Source: NIH RePORTER
RNA interference/silencing mechanisms triggered by double-stranded RNA (dsRNA) have been described in many eukaryotes, including fungi. These mechanisms have in common small RNA molecules (siRNAs or microRNAs) originating from dsRNAs that, together with the effector protein Argonaute, mediate silencing. The genome of the fungal pathogen Candida albicans harbours a well-conserved Argonaute and a non-canonical Dicer, essential members of silencing pathways. Prototypical siRNAs are detected as members of the C. albicans transcriptome, which is potential evidence of RNA interference/silencing pathways in this organism. Surprisingly, expression of a dsRNA a hairpin ADE2 dsRNA molecule to interfere with the endogenous ADE2 mRNA did not result in down-regulation of the message or produce adenine auxotrophic strains. Cell free assays showed that the hairpin dsRNA was a substrate for the putative C. albicans Dicer, discounting the possibility that the nature of the dsRNA trigger affects silencing functionality. Our results suggested that unknown cellular events govern the functionality of siRNAs originating from transgenes in RNA interference/silencing pathways in C. albicans. Copyright (C) 2010 John Wiley & Sons, Ltd.
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