Plant microRNAs (miRNAs) play important roles in the posttranscriptional regulation of protein-coding genes, and they are essential for a normal development and survival. Mature miRNAs are cleaved from larger precursor RNAs and are typically 21-22 nt long. The small size, the lack of a common feature like a poly(A) tail, 3′ end-modifications, and presence of a precursor—all these factors affect the detection and hinder the quantification of miRNAs. The stem-loop qRT-PCR method described here is designed to detect and quantify mature miRNAs in a fast, specific, accurate, and reliable manner. Firstly, a miRNA-specific stem-loop RT primer is hybridized to miRNA and then reverse transcribed. Next, the RT product is amplified and monitored in real time using a miRNAspecific forward primer and a universal reverse primer. This method enables miRNA expression profiling from as little as 10 pg of total RNA, and it is suitable for a relatively high-throughput analysis of miRNA expression.
CITATION STYLE
Varkonyi-Gasic, E. (2017). Stem-loop qRT-PCR for the detection of plant microRNAs. In Methods in Molecular Biology (Vol. 1456, pp. 163–175). Humana Press Inc. https://doi.org/10.1007/978-1-4899-7708-3_13
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