在生物体和免疫系统生理学,发育和功能中,氨酸18A异形机械生物学的新兴概念
William DeKryger1, Zissis C Chroneos1,2
1Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA.
概括
氨酸18A (MYO18A) 基因拼接产生各种蛋白质异型,具有细胞动力学和信号传递方面的专业功能. 这些MYO18A蛋白质虽然缺乏运动活动,但在膜贩运,细胞通信甚至病毒相互作用中发挥作用.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生化学
背景情况:
- 肌素18A (MYO18A) 基因的替代和组合拼接产生了多种不同的蛋白质异型.
- 尽管MYO18A蛋白与肌酸蛋白具有结构上的相似性,但它们缺乏ATP水解和运动活性.
- 异构体在终端扩展和域上有所不同,这影响了它们的本地化和功能.
研究的目的:
- 审查当前对MYO18A蛋白功能专业化的理解.
- 突出MYO18A异型体在细胞过程中的多样性作用.
- 讨论有关MYO18A函数的新兴概念.
主要方法:
- 关于MYO18Aα,MYO18Aβ和MYO18Aγ域组织和功能的实验研究.
- 对MYO18Aε和MYO18Aδ异型的计算预测.
- 对导致异形变异的替代拼接事件的分析.
主要成果:
- MYO18Aα和MYO18Aβ异型在N端域 (KE重复,PDZ域) 中不同,并且具有不同的细胞表达模式.
- MYO18Aγ异型是心脏和骨肌肉特有的,具有富含proline和serine的域.
- 预测的MYO18Aε和MYO18Aδ异型具有C端氨酸丰富的扩展.
- 异形变异源于替代的外子使用,进一步多样化MYO18A蛋白质谱.
结论:
- MYO18A异型体在膜动力学,细胞骨组织和细胞信号传递方面表现出功能专业化.
- 特定的异构体与免疫细胞功能,肌肉生物学和病毒相互作用有关.
- MYO18A蛋白质,包括它们作为表面活性蛋白A的SP-R210受体的作用,对于各种细胞过程至关重要.
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