蛋白相互作用的分子和进化决定因素在II类阿尔多酶/阿杜辛域内
Marina E Seheon1, Amalia S Parra1, Christopher A Johnston1
1Department of Biology, University of New Mexico, Albuquerque, New Mexico, United States of America.
PloS one
|November 10, 2025
概括
类II的阿尔多酶域 (ALDODOM) 在多细胞生物体中进化了新的功能,通过其C端螺旋与泥蛋白相互作用,而不是活性蛋白结合部位. 这个域名域名.
科学领域:
- 进化生物学是进化的生物学.
- 分子生物学分子生物学
- 结构生物学是结构生物学.
背景情况:
- 模块化蛋白相互作用域是多细胞性的关键.
- 阿杜家族中的II类阿尔多酶域 (ALDODOM) 类似于古代的糖分解酶.
- 阿尔多多姆通常会结合亚丁纤维,但它的功能开关尚不清楚.
研究的目的:
- 研究ALDODOM与线性调节器相互作用的分子基础,Mud.
- 阐明了阿尔多酶蛋白折叠的功能切换背后的序列变化.
主要方法:
- 探索了Hts ALDODOM (Drosophila Adducin) 和泥土之间的分子相互作用.
- 使用序列数据库分析来追踪ALDODOM的进化起源.
- 进行了突变分析,包括C端螺旋切断和模拟融合.
主要成果:
- 保存的活性蛋白结合残留物对于泥结合并不重要.
- ALDODOM C-终端螺旋 (CThelix) 和相邻的原体残留物对泥相互作用至关重要.
- 切断CThelix或将其与细菌阿尔多酶融合,使其具有泥结合.
- 在细菌的阿尔多酶中,单次的氨酸到甘氨酸的变化也使得泥结合成为可能.
- 阿尔多多姆的功能很可能起源于像Placozoa这样的早期元动物.
结论:
- 阿尔多多姆与泥的相互作用涉及与活性蛋白结合不同的机制.
- C端螺旋是ALDODOM与泥相互作用的一个关键决定因素.
- 进化分析表明,ALDODOM的功能多样化发生在元动物进化的早期.
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