Reinterpreting sheep muscle strand-specific RNA sequencing data showing extensive 3UTR extensions
ANIMAL GENETICS(2020)
Abstract
The more complex 3' UTR in higher organisms may have the function of increasing post-transcriptional gene regulation. Recent RNA sequencing technologies have provided us with the possibility to capture the complete 3' UTR landscape of different species and cells. However, no systematic analysis of sheep-related 3' UTR has been performed. Here, we conducted a detailed analysis of the 3' UTR with the primary goal of identifying intact 3' UTR landscapes in the sheep muscles of the three developmental stages. Based on strand-specific RNA sequencing (ssRNA-seq) data, we found that thousands of genes in sheep muscle are continuously transcribed after the UTR of the reference genome (Oar_v4.0). More than 66% of the 3' UTR extensions exhibit similar expression trends to their upstream gene exons. These 3' UTR extensions strongly enrich thousands of conserved microRNA binding sites. The 3' UTR extension-associated RNA ofPFKM(PuaRNA) was predicted to be derived from the 3' UTR ofPFKM. In sheep myocytes, myotubes and various tissues, the expression pattern of PuaRNA is positively correlated with that ofPFKM. Taken together, these new 3' UTR annotations greatly extend the range of mammalian post-transcriptional regulatory networks, which have a particular impact on the regulation of sheep muscle development.
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Key words
3 ' UTR extension,long non-coding RNA,muscle,PFKM,sheep
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