Enhanced Live-Cell Delivery of Synthetic Proteins Assisted by Cell-Penetrating Peptides Fused to DABCYL.

Enhanced Live-Cell Delivery of Synthetic Proteins Assisted by Cell-Penetrating Peptides Fused to DABCYL.
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DOI:
10.1002/anie.202016208
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发表时间:
2021-03-22
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Brik A
Brik A
中科院分区:
其他
文献类型:
--
作者:
Mandal S;Mann G;Satish G;Brik A

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活细胞递送对特定靶点具有选择性的全合成蛋白质是一种有前途的方法,具有基础研究和治疗的潜在应用。细胞穿透肽(CPP)允许蛋白质的细胞递送,但大多数情况下会导致内体截留,导致缺乏生物利用度。在此,我们报告了与 4-((4-(二甲氨基)苯基)偶氮)苯甲酸 (DABCYL) 融合的 CPP 的设计和合成,以增强细胞对低微摩尔浓度的荧光标记合成蛋白类似物的摄取。用与 DABCYL 连接的单个赖氨酸修饰的环十精氨酸 (cR10) 与合成泛素 (Ub) 和小泛素样修饰剂 2 (SUMO-2) 支架的连接导致活细胞中的摄取效率比未修饰的 cR10 高出三倍。我们还可以实现 cR10DABCYL 辅助递送 Ub 和基于 Ub 变体 (Ubv) 的活性探针,用于活细胞中去泛素酶的功能研究。由于内体截留和随后的降解,合成天然蛋白的有效细胞内递送是一个挑战。我们报告了通过附加新开发的细胞穿透肽(CPP)增强了细胞对荧光标记合成蛋白的摄取,该细胞穿透肽由与 DABCYL 连接的环十精氨酸组成。
Live‐cell delivery of a fully synthetic protein having selectivity towards a particular target is a promising approach with potential applications for basic research and therapeutics. Cell‐penetrating peptides (CPPs) allow the cellular delivery of proteins but mostly result in endosomal entrapment, leading to lack of bioavailability. Herein, we report the design and synthesis of a CPP fused to 4‐((4‐(dimethylamino)phenyl)azo)benzoic acid (DABCYL) to enhance cellular uptake of fluorescently labelled synthetic protein analogues in low micromolar concentration. The attachment of cyclic deca‐arginine (cR10) modified with a single lysine linked to DABCYL to synthetic ubiquitin (Ub) and small ubiquitin‐like modifier‐2 (SUMO‐2) scaffolds resulted in a threefold higher uptake efficacy in live cells compared to the unmodified cR10. We could also achieve cR10DABCYL‐assisted delivery of Ub and a Ub variant (Ubv) based activity‐based probes for functional studies of deubiquitinases in live cells. Efficient intracellular delivery of synthetic native proteins is a challenge due to endosomal entrapment and subsequent degradation. We report the enhanced cellular uptake of fluorescently labelled synthetic proteins by attaching a newly developed cell‐penetrating peptide (CPP) composed of cyclic deca‐arginine linked to DABCYL.
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