A quantitative map of human primary microRNA processing sites
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA728872 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14479809_1.fastq.gz | Fastqsanger.gz | |||
| SRR14479809_2.fastq.gz | Fastqsanger.gz | |||
| SRR14479810_1.fastq.gz | Fastqsanger.gz | |||
| SRR14479810_2.fastq.gz | Fastqsanger.gz | |||
| SRR14479811_1.fastq.gz | Fastqsanger.gz |
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Project description:A quantitative map of human primary microRNA processing sites [2]
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Project description:Maturation of canonical microRNA (miRNA) is initiated by DROSHA that cleaves the primary transcript (pri-miRNA). Over 1,800 miRNA loci are annotated in humans, but it remains largely unknown if and at which sites the pri-miRNAs are cleaved by DROSHA. Here we performed in vitro processing on a full set of human pri-miRNAs (miRBase v21) followed by sequencing. This comprehensive profiling enabled us to classify miRNAs based on DROSHA-dependence and map their cleavage sites with respective processing efficiency measures. Only 758 pri-miRNAs are confidently processed by DROSHA, while the majority may be non-canonical or false entries. Analyses of the DROSHA-dependent pri-miRNAs show key cis-elements for processing. We observe widespread alternative processing as well as unproductive cleavage events such as “nick” or “inverse” processing. SRSF3 is a broad-acting auxiliary factor modulating alternative processing and suppressing unproductive processing. The profiling data and methods developed in this study will allow systematic analyses of miRNA regulation.
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