隐藏的细菌微蛋白质组是细菌的微蛋白质组.
Igor Fesenko1, Harutyun Sahakyan1, Rajat Dhyani2
1Computational Biology Branch, Division of Intramural Research, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA.
Molecular cell
|February 20, 2025
概括
研究人员从细菌基因组中确定了67,297个微蛋白家族. 这些微蛋白中的许多被跨基因小型开放阅读框架 (ismORFs) 编码的微蛋白都被表达出来,并且可能具有不同的功能.
科学领域:
- 微生物学 微生物学
- 蛋白质组学是指蛋白质组学.
- 生物信息学是一种生物信息学.
背景情况:
- 微蛋白质由小型开放的读取框架编码,代表蛋白质组的很大一部分,通常被称为"暗物质".
- 虽然在生命领域中检测到许多微蛋白,但许多微蛋白仍然未被识别和功能性未被描述.
研究的目的:
- 为了全面识别和表征的微型蛋白质编码的跨基因小开放的读取框架 (ismORFs) 在肠杆菌家族.
- 评估这些新发现的细菌微蛋白的进化保存和潜在功能.
主要方法:
- 来自Enterobacteriaceae家族的5,668个细菌基因组的生物信息分析,以识别ismORFs (15-70个编码子).
- 在特定的ismORFs上作用的净化选择的计算预测.
- 使用标记蛋白质对大肠杆菌中预测的微蛋白表达的实验验证.
主要成果:
- 在Enterobacteriaceae中,在净化选择下识别了67,297个ismORF群.
- 在大肠杆菌中测试的16种微蛋白中,实验检测了11种微蛋白的表达,验证了计算预测.
- 预测的微蛋白通常是疏水性,跨膜性或无结构的,但有些呈现球状折叠,并有可能与邻近的蛋白质进行寡合化或相互作用.
结论:
- 已经确定了由ismORFs编码的大量细菌微蛋白,这表明了细菌蛋白质组的重要,以前被低估的组成部分.
- 该研究提供了预测的微蛋白家族的可搜索资源,包括转录,翻译和结构的证据,促进未来的功能调查.
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