Distinct polyadenylation landscapes of diverse human tissues revealed by a modified PA-seq strategy.
Distinct polyadenylation landscapes of diverse human tissues revealed by a modified PA-seq strategy.
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修改后的 PA-seq 策略揭示了不同人体组织的独特聚腺苷酸化景观
DOI:
10.1186/1471-2164-14-615
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发表时间:
2013-09-11
期刊:
影响因子:
4.4
通讯作者:
Zhu J
中科院分区:
文献类型:
--
作者:
Ni T;Yang Y;Hafez D;Yang W;Kiesewetter K;Wakabayashi Y;Ohler U;Peng W;Zhu J
BackgroundPolyadenylation is a key regulatory step in eukaryotic gene expression and one of the major contributors of transcriptome diversity. Aberrant polyadenylation often associates with expression defects and leads to human diseases.ResultsTo better understand global polyadenylation regulation, we have developed a polyadenylation sequencing (PA-seq) approach. By profiling polyadenylation events in 13 human tissues, we found that alternative cleavage and polyadenylation (APA) is prevalent in both protein-coding and noncoding genes. In addition, APA usage, similar to gene expression profiling, exhibits tissue-specific signatures and is sufficient for determining tissue origin. A 3′ untranslated region shortening index (USI) was further developed for genes with tandem APA sites. Strikingly, the results showed that different tissues exhibit distinct patterns of shortening and/or lengthening of 3′ untranslated regions, suggesting the intimate involvement of APA in establishing tissue or cell identity.ConclusionsThis study provides a comprehensive resource to uncover regulated polyadenylation events in human tissues and to characterize the underlying regulatory mechanism.
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