Performances of Different Fragment Sizes for Reduced Representation Bisulfite Sequencing in Pigs

文献类型： 外文期刊

第一作者： Yuan, Xiao-Long

作者： Yuan, Xiao-Long;Zhang, Zhe;Pan, Rong-Yang;Gao, Ning;Deng, Xi;Li, Bin;Zhang, Hao;Li, Jia-Qi;Yuan, Xiao-Long;Sangild, Per Torp;Gao, Ning

作者机构：

关键词： DNA methylation;RRBS;Different fragment sizes;Pigs

期刊名称：BIOLOGICAL PROCEDURES ONLINE （ 影响因子：3.244； 五年影响因子：4.242 ）

ISSN： 1480-9222

年卷期： 2017 年 19 卷

页码：

收录情况： SCI

摘要： Background: Reduced representation bisulfite sequencing (RRBS) has been widely used to profile genome-scale DNA methylation in mammalian genomes. However, the applications and technical performances of RRBS with different fragment sizes have not been systematically reported in pigs, which serve as one of the important biomedical models for humans. The aims of this study were to evaluate capacities of RRBS libraries with different fragment sizes to characterize the porcine genome. Results: We found that the Mspl-digested segments between 40 and 220 bp harbored a high distribution peak at 74 bp, which were highly overlapped with the repetitive elements and might reduce the unique mapping alignment. The RRBS library of 110-220 bp fragment size had the highest unique mapping alignment and the lowest multiple alignment. The cost-effectiveness of the 40-110 bp, 110-220 bp and 40-220 bp fragment sizes might decrease when the dataset size was more than 70,50 and 110 million reads for these three fragment sizes, respectively. Given a 50-million dataset size, the average sequencing depth of the detected CpG sites in the 110-220 bp fragment size appeared to be deeper than in the 40-110 bp and 40-220 bp fragment sizes, and these detected CpG sties differently located in gene- and CpG island-related regions. Conclusions: In this study, our results demonstrated that selections of fragment sizes could affect the numbers and sequencing depth of detected CpG sites as well as the cost-efficiency. No single solution of RRBS is optimal in all circumstances for investigating genome-scale DNA methylation. This work provides the useful knowledge on designing and executing RRBS for investigating the genome-wide DNA methylation in tissues from pigs.

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