对ADAM17-iRhom2复合体的激活和抑制的结构见解
Joseph J Maciag1, Conner E Slone1, Hala F Alnajjar1
1Department of Molecular and Cellular Biosciences, University of Cincinnati College of Medicine, Cincinnati, OH 45267.
概括
研究人员揭示了ADAM17与iRhom2结合的冷EM结构,详细说明了该复合物如何调节酶活性. 这些发现揭示了与失调的ADAM17 (一种分解蛋白和金属蛋白酶) -17相关的疾病的治疗点.
科学领域:
- 生物化学 生化学
- 结构生物学 结构生物学
- 分子医学是分子医学.
背景情况:
- ADAM17 (一种分解蛋白和金属蛋白酶) -17是调节EGFR配体和TNF-α的关键酶,对发育和免疫力至关重要.
- 失调的ADAM17活性与癌症,炎症和像SARS-CoV-2这样的病毒感染有关.
- ADAM17细胞原体的成熟和活性由结合伙伴,非活性状蛋白 (iRhom) -1和-2控制.
研究的目的:
- 确定与iRhom2.2复合的ADAM17生殖基的冷EM结构.
- 阐明控制ADAM17-iRhom2复合体形成和调节的分子相互作用.
- 为了确定治疗抗体和ADAM17原域的抑制机制.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于解析ADAM17-iRhom2复合物的结构.
- 生物化学测试用于分析蛋白质相互作用和酶活性.
- 细胞检测验证结构发现和功能影响.
主要成果:
- 确定了与iRhom2结合的ADAM17生殖基的冷EM结构.
- 在复合体内阐明了关键相互作用,包括ADAM17前域和MEDI3622抗体的抑制作用.
- 在ADAM17激活中发现了一个iRhom2细胞质循环的新功能.
结论:
- 对ADAM17-iRhom2复合体的结构洞察力提供了对其调节的机制理解.
- 这些发现揭示了针对各种疾病的ADAM17复合体的潜在治疗策略.
- 通过细胞测试的验证支持观察到的相互作用的功能相关性.
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