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JoVE Journal
Neuroscience
酿酒酵母 阿尔茨海默病模型筛选通过 γ-分泌酶影响淀粉样蛋白 β 生成的基因、突变和化学物质
酿酒酵母 阿尔茨海默病模型筛选通过 γ-分泌酶影响淀粉样蛋白 β 生成的基因、突变和化学物质
JoVE Journal
Neuroscience
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JoVE Journal Neuroscience
Saccharomyces cerevisiae Models of Alzheimer’s Disease to Screen Genes, Mutations, and Chemicals Affecting Amyloid Beta Production by γ-Secretase

酿酒酵母 阿尔茨海默病模型筛选通过 γ-分泌酶影响淀粉样蛋白 β 生成的基因、突变和化学物质

Full Text
590 Views
11:57 min
June 24, 2025

DOI: 10.3791/67733-v

Eugene Futai1, Mio Shiina1, Ying Dai1, Khadija Daoudi1, Masafumi Hidaka1, Tomohisa Ogawa1

1Department of Agricultural Chemistry, Graduate School of Agricultural Science,Tohoku University

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Please note that some of the translations on this page are AI generated. Click here for the English version.

在这里,我们描述了一个重组人 γ-分泌酶的酵母系统。该系统允许识别和研究影响活性的突变以及筛选γ-分泌酶抑制剂 (GSI)。利用家族性阿尔茨海默病突变体的功能特性丧失,可以筛选γ分泌酶调节剂 (GSM)。

我们正在重构酵母中的γ-分泌酶,以研究FAD相关突变如何影响其活性,以及抑制突变或化学调节剂如何恢复其功能并降低致病性Abeta-42水平。我们结合了利用哺乳动物细胞和酵母系统的功能分析,以及通过冷冻电磁学进行结构分析,研究γ-分泌酶调节的机制。我们利用酵母中的γ-分泌酶重组系统分析FAD突变,识别出能够恢复γ-分泌酶FAD突变活性的抑制因子,同时降低Abeta-42水平,模拟γ分泌酶调节因子的作用。

我们的方案能够快速且可扩展地筛选酵母中γ-分泌酶活性,从而无需依赖复杂的哺乳动物系统,即可分析人类突变和调节因子。我们将重点鉴定新的遗传或化学调节剂和抑制γ-分泌酶A,阐明Abeta 42的生成机制,并作为人类膜内蛋白水解扩展酵母基重建系统。首先,利用标准的醋酸锂方法将质粒转化为酵母PJ69-4A菌株,表达γ-分泌酶及其底物。

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