一个CRISPR激活屏幕识别了FBXO22,支持向蛋白质降解
Ananya A Basu1,2, Chenlu Zhang1, Isabella A Riha1
1Department of Chemistry, Northwestern University, Evanston, IL, USA.
Nature chemical biology
|July 4, 2024
概括
研究人员发现了一种新的E3结合酶,F-box蛋白22 (FBXO22),以增强向蛋白质降解 (TPD),使用向蛋白解的嵌合体 (PROTACs). 这一发现扩大了降解疾病相关蛋白质的工具包.
科学领域:
- 化学生物学 化学生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 向蛋白降解 (TPD) 是消除特定蛋白质的强大方法.
- 扩大E3结合酶的谱系对于推进TPD应用至关重要.
- 现有的E3链酶限制了TPD策略的范围.
研究的目的:
- 识别能够促进异性双功能化合物介导降解的新型人类E3链酶.
- 为了发现新的E3连接酶用于蛋白质分解向嵌合体 (PROTAC) 开发.
- 验证已识别的E3酶在降解各种标蛋白中的有用性.
主要方法:
- 基于CRISPR的转录激活屏幕被用于识别功能性E3链接酶.
- 一个候选的PROTAC,22-SLF,被设计和测试了其诱导目标降解的能力.
- 机理学研究研究了PROTAC与已识别的E3结合酶之间的相互作用.
- 基于FBXO22的PROTACs的有效性被证明是针对额外的内源蛋白.
主要成果:
- 一个CRISPR屏幕识别了F-box蛋白22 (FBXO22) 作为TPD的新型E3结合酶.
- 证明PROTAC 22-SLF可以通过FBXO22.22诱导FK506结合蛋白12 (FKBP12) 的降解.
- 发现22-SLF与FBXO22.22中的氨酸残留物C227和/或C228相互作用.
- 基于FBXO22的PROTACs成功地降解了含有原体的蛋白4 (BRD4) 和皮微管相关蛋白类的4-anaplastic淋巴瘤激酶 (EML4-ALK) 融合蛋白.
结论:
- FBXO22是一种新发现的E3结合酶,可用于向蛋白质降解.
- 基于FBXO22的PROTAC提供了一个多功能平台,用于降解各种内源蛋白质.
- 这项工作扩展了E3酶工具箱,用于开发新型TPD治疗方法.
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