通过负离子电子转移解离和红外多光子解离质谱法进行miRNA和DNA分析
Miriam Guzmán-Lorite1, Frédéric Rosu2, María Luisa Marina3
1Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares (Madrid), Spain.
Analytica chimica acta
|March 18, 2024
概括
新的碎片化方法将电子转移解离与红外多光子解离 (nETD-IRMPD) 结合起来,为微RNA (miRNA) 提供了优质的分析. 这种技术为miRNA识别和疾病研究提供了高序列覆盖和结构洞察力.
科学领域:
- 质谱测量质量谱测量
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 串联质谱碎片化技术为分子提供了补充的结构信息.
- 对寡核酸的分析,特别是对微RNA (miRNA) 的分析,由于它们的调节作用和疾病关联,至关重要.
- 探索用于miRNA识别的先进碎片化方法具有重大意义.
研究的目的:
- 调查微RNA (miRNA) 分析新型混合碎片化技术的有效性.
- 为了评估电子转移解离与红外多光子解离 (nETD-IRMPD) 的组合,用于miRNA碎片化.
- 为了将nETD-IRMPD与CID和IRMPD等常规方法进行比较,用于miRNA识别.
主要方法:
- 使用ESI-FT-ICR质谱学合成miRNA和DNA序列的碎片化.
- 碰撞诱导解离 (CID) 的应用,nETD之后是CID,IRMPD和nETD-IRMPD.
- 本地MS分析,以评估在生理条件下二元体的形成.
主要成果:
- 基地损失是跨技术的主要碎片化道.
- nETD-IRMPD产生了更高的d/z,a/w和c/y离子强度,具有更高的序列覆盖率和更少的内部碎片化.
- 本地MS在生理离子强度下证实了miR159和DNA序列的稳定二元形成.
结论:
- 结合nETD和IRMPD是miRNA碎片化的有效替代方案,提供高序列覆盖率的高效分析.
- nETD-IRMPD允许在与生理学相似的条件下使用本地MS获取结构信息.
- 这种先进的碎片化策略增强了miRNAs的识别和表征.
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