内体位置 +9 和 -9 是从内体变异的潜在拼接站点边界. 分析整个外体序列数据的整个外体序列数据
Li Zhang1, Minna Shen1, Xianhong Shu2
1Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
BMC medical genomics
|June 26, 2023
概括
整个外体序列 (WES) 识别了影响基因表达的内基因变异. 这项研究揭示了这些变异的特征,突出了+9/-9作为拼接边界的位置和+5/-5作为拼接和基因表达的关键位置.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 整体外基因组测序 (WES) 是检测遗传变异的一个强大工具.
- 通过WES识别的内部变异可以影响剪接和基因表达.
- 来自WES数据的内部变异的临床实用性仍未得到充分探索.
研究的目的:
- 在WES数据中检测到的内部变异的特征.
- 通过了解内源变异模式,增强WES的临床诊断价值.
- 调查与外型相对的内型变异的位置特征.
主要方法:
- 分析了269个全系外体测序数据集.
- 识别和质量控制过超过367,000个内基变异在200个基因对旁边的外体内.
- 变种有害性的生物信息预测.
主要成果:
- 内部变体质量控制 (QC) 的通过率显示出明显的模式,最低的比率在+2/-2位置,最高在+9/-9.
- +9/-9位置表明潜在的拼接地点边界.
- +5/-5位置显示了软件预测的破坏性变异数量最多,并且与拼接/基因表达有关.
- 在WES数据中,超过±50 bps的侧面外子变异可能是不可靠的.
结论:
- 这项研究提供了WES数据中内基变异的首次全面表征.
- 确定了关键的内部位置 (+9/-9,+5/-5,+2/-2),对剪接和基因表达有重大影响.
- WES数据对于内部变异分析具有相当大的价值,改善了诊断产量.
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