在溶液中的人类DjC20/HscB可沙佩龙的结构特征
Amanda Lais de Souza Coto1, Arthur Alexandre Pereira1, Sabrina Dorta Oliveira1
1São Carlos Institute of Chemistry, University of São Paulo - USP, 13560-970 São Carlos, SP, Brazil.
Biochimica et biophysica acta. Proteins and proteomics
|October 23, 2023
概括
人类DjC20是一种J域蛋白质,需要离子以保持稳定性和在Hsp70伴侣活动中的功能. 它对的高度亲和力对于保持其分子结构至关重要.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 结构生物学 结构生物学
背景情况:
- J-域蛋白 (JDPs) 是重要的分子伴侣,调节蛋白质稳定.
- 人类DjC20 (HscB) 是一种III型的JDP,对线粒体[FeS]蛋白生物发生至关重要,有助于HSPA9.9.
- 人类DjC20的N端指域对其功能至关重要.
研究的目的:
- 为了研究人类DjC20 (hDjC20) 的溶液结构.
- 确定离子 (Zn2+) 在hDjC20稳定性和功能的作用.
主要方法:
- 再组合蛋白的表达和净化.
- 小角度X射线散射 (SAXS) 和SEC-MALS用于结构分析.
- 在有化剂 (EDTA,DTPA) 的情况下进行热和化学化试验.
主要成果:
- 再组合的hDjC20是纯粹的,折叠的,并刺激了HSPA9 ATPase活动.
- SAXS和SEC-MALS表示hDjC20存在于一个略长的单体.
- Zn2+在1:1的立体测量中存在,并且抵抗EDTA/DTPA的去除.
- 由EDTA诱导的变性暴露了蛋白质稳定性的降低,突出了Zn2+的作用.
结论:
- 离子与hDjC20具有高度亲和力,对其结构完整性起着至关重要的作用.
- 由Zn2+所赋予的稳定性对于hDjC20的陪伴功能至关重要.
- 了解hDjC20-Zn2+相互作用,可以深入了解JDP机制.
关键词:
DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20 DjC20在 DnaJC2020 中.在HSPA9中,HSPA9是HSPA9标准.这就是为什么HscBB.分子的伴侣是分子的伴侣.蛋白质折叠过程中的蛋白质折叠更多相关视频
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