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试管复制显示了蛋白质S-转移酶的基质选择性

Tanmay Mondal¹, James Song¹, Anirban Banerjee¹

¹Section on Structural and Chemical Biology, Neurosciences and Cellular and Structural Biology Division, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA.

The Journal of biological chemistry

|March 16, 2025

概括

蛋白质棕化,一个关键的脂质修饰,涉及zDHHC酶. 一个新的测试揭示了首选的基质层次结构以及附近的残留物如何影响zDHHC酶对蛋白质S-化特异性的影响.

科学领域:

生物化学生物化学
分子生物学分子生物学
细胞生物学细胞生物学

背景情况:

蛋白质S-化 (棕化) 是一种影响成千上万种蛋白质的普遍脂化.
该zDHHC酶家族催化棕化,对于细胞功能和疾病至关重要.
由于有限的体外研究,zDHHC-基质相互作用是复杂的和不太了解的.

研究的目的:

开发和使用一种体外试验法来研究zDHHC酶-基质相互作用.
为了研究zDHHC酶之间的基质特异性和层次.
阐明邻近残基在基质S-化中的作用.

主要方法:

使用纯化的zDHHC酶和基质片段开发了Pep-PAT试验.
在体外测试了三种zDHHC酶对七种基质的S-化.
研究了围绕体蛋白的残留物对PSD-95和SARS-CoV-2尖端蛋白的S-化的影响.
通过在纤维素测定中使用验证的结果.

主要成果:

对于不同的zDHHC酶,有明显的基质偏好和层次结构.
确定了特定的邻近残留物,这些残留物调节基质S-化.
证实了这些残留物在细胞环境中的S-化作用的影响.
建立了一个理解zDHHC酶基质识别的框架.

结论:

zDHHC酶表现出偏好的基质层次结构.
邻近的残留物极大地影响zDHHC酶对基质的S-化.
佩普-PAT试验提供了一个强大的工具,用于剖析棕化机制.

关键词:

这是一种Pep-PAT测定.在S-乙化过程中,然后点击化学.结合酶测定法结合酶测定法在体外溶解中的溶解.膜酶是一种膜酶.一个纳米光盘.棕甲基CoA是一种棕甲基.蛋白质的脂化是蛋白质的脂化.蛋白质棕化转化为棕化基质选择性基质选择性的 zDHHC 酶.

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