Alternative splicing and trans-splicing events revealed by analysis of the Bombyx mori transcriptome

文献类型： 外文期刊

第一作者： Zhao, Qiong-Yi

作者： Zhao, Qiong-Yi;Li, Xuan;Shao, Wei;Wang, Xiu-Ye;Xu, Xin-Yan;Tang, Qing;Xu, Yong-Zhen;Li, Muwang

作者机构：

关键词： Alternative splicing;Bombyx mori;RNA-seq;SR protein;Trans-splicing

期刊名称：RNA （ 影响因子：4.942； 五年影响因子：4.921 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Alternative splicing and trans-splicing events have not been systematically studied in the silkworm Bombyx mori. Here, the silkworm transcriptome was analyzed by RNA-seq. We identified 320 novel genes, modified 1140 gene models, and found thousands of alternative splicing and 58 trans-splicing events. Studies of three SR proteins show that both their alternative splicing patterns and mRNA products are conserved from insect to human, and one isoform of Srsf6 with a retained intron is expressed sex-specifically in silkworm gonads. Trans-splicing of mod(mdg4) in silkworm was experimentally confirmed. We identified integrations from a common 5′-gene with 46 newly identified alternative 3′-exons that are located on both DNA strands over a 500-kb region. Other trans-splicing events in B. mori were predicted by bioinformatic analysis, in which 12 events were confirmed by RT-PCR, six events were further validated by chimeric SNPs, and two events were confirmed by allele-specific RT-PCR in F 1 hybrids from distinct silkworm lines of JS and L10, indicating that trans-splicing is more widespread in insects than previously thought. Analysis of the B. mori transcriptome by RNA-seq provides valuable information of regulatory alternative splicing events. The conservation of splicing events across species and newly identified trans-splicing events suggest that B. mori is a good model for future studies. Published by Cold Spring Harbor Laboratory Press.

分类号： Q5

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