Target protein deglycosylation in living cells by a nanobody-fused split O-GlcNAcase.

Target protein deglycosylation in living cells by a nanobody-fused split O-GlcNAcase.
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DOI:
10.1038/s41589-021-00757-y
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发表时间:
2021-05
影响因子:
14.8
通讯作者:
Woo CM
Woo CM
中科院分区:
生物学1区
文献类型:
--
作者:
Ge Y;Ramirez DH;Yang B;D'Souza AK;Aonbangkhen C;Wong S;Woo CM

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O-GlcNAc是一种重要的动态翻译后修饰,存在于数千种核质蛋白上。询问O-GlcNAc在单个靶蛋白上的作用是至关重要的,但在细胞中执行是具有挑战性的。在这里,我们开发了一种纳米体融合的裂解O-GlcNAcase(OGA)作为O-GlcNAc擦除剂,用于选择性地在细胞中对目标蛋白进行脱糖基化。经过系统的细胞优化,我们确定了一种具有降低固有脱糖苷酶活性的裂解OGA,该裂解OGA在纳米体的指导下选择性地从所需的目标蛋白中去除O-GlcNAc。我们展示了用四个纳米体针对五个靶蛋白构建的纳米体融合裂解OGA的通用性,并利用该系统研究了O-GlcNAc对转录因子c-jun和c-Fos的功能。纳米体导向的O-GlcNAc擦除器通过选择性地直接从细胞中的单个蛋白质中去除O-GlcNAc,为O-GlcNAc的功能评估和工程设计提供了新的策略。
O-GlcNAc is an essential and dynamic post-translational modification presented on thousands of nucleocytoplasmic proteins. Interrogating the role of O-GlcNAc on a single target protein is crucial yet challenging to perform in cells. Herein, we developed a nanobody-fused split O-GlcNAcase (OGA) as an O-GlcNAc eraser for selective deglycosylation of a target protein in cells. After systematic cellular optimization, we identified a split OGA with reduced inherent deglycosidase activity that selectively removed O-GlcNAc from the desired target protein when directed by a nanobody. We demonstrate the generality of the nanobody-fused split OGA using four nanobodies against five target proteins, and use the system to study functions for O-GlcNAc on the transcription factors c-Jun and c-Fos. The nanobody-directed O-GlcNAc eraser provides a new strategy for functional evaluation and engineering of O-GlcNAc via the selective removal of O-GlcNAc from individual proteins directly in cells.
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糖尿病和糖尿病并发症的蛋白O-Glcnacylation。
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