人类附件A7的相分离和纤维化由其富含proline的域介导
Chenrong Yu1, Spencer L Nelson1, Georg Meisl2
1Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States.
Biochemistry
|October 3, 2023
概括
人类附录A7 A7
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 人类附录素A7 (A7) 是一种和脂结合蛋白,参与细胞过程,如平衡,膜修复,亡和瘤进展.
- 甲基7的N端氨酸丰富域 (PRD) 决定了其特定的功能,其特点是氨酸含量高 (∼24%).
研究的目的:
- 为了研究人类附件A7及其富含proline的域 (PRD) 的生物物理行为.
- 阐明A7-PRD.的聚合和纤维状细胞形成的机制.
主要方法:
- 显微镜技术观察相位分离和凝结物形成.
- 染料结合试验检测结构变化.
- 分析纤维化过程的化学动力学,包括初级和二级核化.
主要成果:
- 再组合附件A7及其分离的PRD经历自发的液体-液体相分离成球形凝结物.
- 这些凝结物成熟成为类似粉样蛋白的,富含β-叶片的纤维.
- 纤维化遵循已建立的核化依赖的聚合动力学,涉及初级和二级核化.
结论:
- 附录A7的富含proline的域容易发生粉样蛋白聚合.
- 这种聚合机制为真核细胞中这种富含林的域的生理和病理作用提供了洞察力.
- 这些发现突出了相分离,粉样蛋白形成和涉及附件A7.7的疾病过程之间的潜在联系.
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