寒冷冲击蛋白YB-1的guanidinylation:分子基础,结构变化和Notch-3受体结合
Anna Leitz1, Batuhan Kav2, Xiyang Liu1
1Department of Nephrology and Clinical Immunology, RWTH Aachen University, Aachen, Germany.
Protein science : a publication of the Protein Society
|June 26, 2025
概括
Y盒结合蛋白 (YB) -1 的翻译后修改,称为瓜尼迪尼化,与血清尿素水平和糖氨酸胺转移酶 (GATM) 活性有关. 这种修改改变了YB-1蛋白质结构及其与Notch-3受体的相互作用.
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:
- 翻译后的修改极大地调节了Y盒结合蛋白 (YB) -1 的功能.
- 了解这些修改对于破译YB-1的不同角色至关重要.
研究的目的:
- 为了研究 YB-1 瓜尼迪尼लेशन 的分子机制.
- 探索瓜尼化对YB-1结构和Notch-3受体结合的影响.
主要方法:
- 计算机模拟 (分子动力学) 用于分析蛋白质的稳定性和形状.
- 蛋白质与蛋白质对接以预测结合相互作用.
- 受体 - 连接体结合测试以实验验证相互作用.
主要成果:
- 血清尿素和甘氨酸胺基转移酶 (GATM) 活性增加与YB-1关氨基化相关.
- 双重瓜尼迪尼化YB-1 (YB-1-2G) 呈现了二次结构的改变和冷冲击领域的溶剂暴露增加.
- 证实了YB-1与Notch-3受体的EGF域17-24的结合,但对于YB-1-2G没有显著差异.
- YB-1 证明了与另一个 Notch-3 位点的高亲和度结合,取代了 Jagged.
结论:
- 确定了 YB-1 瓜尼迪尼लेशन 的分子驱动因素.
- 证明 YB-1 瓜尼迪尼लेशन 影响蛋白质结构,但其对 Notch-3 的主要结合没有显著影响.
- 揭示了 YB-1 与 Notch-3 相互作用的新机制,涉及到 Jagged 的位移.
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