人类胎盘中未注释的微蛋白的蛋白质定型揭示了XRCC6P1作为潜在的翻译负调节剂
Qiong Li1,2, Fanrong Liu3, Xiaoyu Ma4
1Department of Obstetrics and Gynecology, The First People's Hospital of Chenzhou, Chenzhou 423000, China.
Journal of proteome research
|August 22, 2024
概括
研究人员在人类胎盘中发现了一个隐藏的世界,小的和替代的开放阅读框架 (sm/alt-ORF) 编码的微蛋白质. 这些新型蛋白质可能在胎盘发育和孕前症等疾病中发挥作用.
科学领域:
- 蛋白质组学是指蛋白质组学.
- 人类胎盘生物学
- 分子生物学分子生物学
背景情况:
- 数以千计的未注释的小型和替代的开放阅读框架 (sm/alt-ORF) 转化为哺乳动物细胞中的微蛋白和替代蛋白.
- 这些微蛋白在人体组织中的流行率和生物学作用在很大程度上是未知的.
- 人体胎盘,其多样化的蛋白质组支持胎儿发育,是识别新型微蛋白的关键地点.
研究的目的:
- 在人类胎盘组织中分析未注释的微蛋白和替代蛋白.
- 研究已识别的微蛋白的翻译和稳定性.
- 探索特定微蛋白在翻译调节中的功能作用.
主要方法:
- 从预先怀孕症患者和健康个体的人类胎盘组织的蛋白质组分析.
- 在异质细胞系中使用过度表达结构验证微蛋白翻译.
- 生物化学测试以确定微蛋白XRCC6P1与翻译启动因子eIF3.3的相互作用和功能.
主要成果:
- 在人类胎盘中识别了52种未注释的微蛋白或替代蛋白.
- 来自过度表达结构的五种微蛋白的翻译的演示,并指出几种微蛋白的不稳定性.
- 描述微蛋白XRCC6P1与eIF3的关联及其在过度表达时对翻译的负面调节效应.
结论:
- 一个隐藏的sm/alt-ORF编码的蛋白质存在于人的胎盘中.
- 包括XRCC6P1在内的已识别的微蛋白质代表了胎盘生物学中的新型参与者.
- 这些发现可能会推进对胎盘发育和诸如子宫前症之类的疾病的机制研究.
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