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鱼类中的分离分子签名 Bouncer 蛋白质定义了交叉受精界限
Krista R B Gert1,2, Karin Panser1, Joachim Surm3
1Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030, Vienna, Austria.
Nature communications
|June 14, 2023
概括
在受精时的分子兼容性依赖于精子-卵子识别. 这种蛋白质叫做保蛋白.
科学领域:
- 生殖生物学 生殖生物学
- 进化遗传学的进化遗传学
- 受精的分子机制受精的分子机制.
背景情况:
- 由表面蛋白质调解的配体分子兼容性,对于成功受精至关重要,并可能导致物种之间的杂交.
- 卵膜蛋白Bouncer在特定物种的雌性体相互作用中起着关键作用,特别是在防止梅达卡和斑马鱼之间的交叉受精方面.
研究的目的:
- 为了研究鱼类雌性体相互作用中Bouncer蛋白赋予的物种特异性的分子基础.
- 为了确定特定的氨基酸残留物和N-葡萄糖化模式,影响Bouncer功能和跨物种不相容性.
主要方法:
- 麦达卡和斑马鱼的比较分析 跳者蛋白质功能.
- 识别不同的氨基酸残留物和N-糖化模式,影响Bouncer在配体识别和结合中的作用.
主要成果:
- 特定的氨基酸残留物和N-糖化模式在Bouncer中不同影响其功能,导致medaka和斑马鱼之间的跨物种不相容.
- 相比之下,海马和fugu Bouncer蛋白与medaka和斑马鱼精子具有广泛的兼容性,这表明Bouncer存在不同的进化压力.
结论:
- 排斥者-精子相互作用是由对立的进化力量塑造的,导致密切相关物种之间的受限受精或广泛的兼容性使杂交成为可能.
- 了解保的作用为我们提供了关于生殖隔离和物种化的演变的见解.
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