Abstract：
:Alternative polyadenylation has been recognized as a key contributor of gene expression regulation by generating different transcript isoforms with altered 3' ends. Although polyadenylation is well known for marking the end of a 3' UTR, an increasing number of studies have reported previously less-addressed polyadenylation events located in other parts of genes in many eukaryotic organisms. These other locations include 5' UTRs, introns and coding sequences (termed herein as non-3UTR), as well as antisense and intergenic polyadenlation. Focusing on the non-3UTR polyadenylation sites (n3PASs), we detected and characterized more than 11000 n3PAS clusters in the Arabidopsis genome using poly(A)-tag sequencing data (PAT-Seq). Further analyses suggested that the occurrence of these n3PASs were positively correlated with certain characteristics of their respective host genes, including the presence of spliced, diminutive or diverse beginning of 5' UTRs, number of introns and whether introns have extreme lengths. The interaction of the host genes with surrounding genetic elements, like a convergently overlapped gene and associated transposable element, may contribute to the generation of a n3PAS as well. Collectively, these results provide a better understanding of n3PASs, and offer some new insights of the underlying mechanisms for non-3UTR polyadenylation and its regulation in plants.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Guo C,Spinelli M,Liu M,Li QQ,Liang Cdoi
10.1038/srep28060subject
Has Abstractpub_date
2016-06-15 00:00:00pages
28060issn
2045-2322pii
srep28060journal_volume
6pub_type
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