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Developing safe and efficient CGBE editor based on Cas-embedding strategy

delete2025-06-01
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林田 cover
林田 (Tian Lin)
王鑫 cover
王鑫 (Xin Wang)
Y
Yu Zhang
G
Guanglei Li
X
Xingxu Huang
DOI:10.1016/j.synbio.2025.02.001delete
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Abstract

Abstract

En 中文
CGBE (C-to-G base editor) systems, pivotal components within the base editing arsenal, enable the precise conversion of cytosines to guanines. However, conventional cytidine deaminases possess non-specific single- stranded DNA binding properties, leading to off-target effects and safety concerns. The Cas-embedding strategy, which involves embedding functional proteins like deaminases within the Cas9 enzyme's architecture, emerges as a method to mitigate these off-target effects. Our study pioneers the application of the Cas-embedding strategy to CGBE systems, engineering a suite of novel CGBE editors, CE-CGBE. The CE-CGBE that incorporated eA3A, RBMX and Udgx excelled in editing efficiency, editing purity, and indel formation was named HF-CGBE. HFCGBE showed no significant difference in off-target effects compared to the negative control group for both DNA and RNA. In summary, the novel HF-CGBE editors we propose expand the base editing toolbox and provide therapeutic approaches for related pathogenic mutations.
Keywords:
CGBE
Cas-embedding
Off-target
eA3A
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Journal

Synthetic and Systems Biotechnology cover
Synthetic and Systems Biotechnology
IF:
4.4
Papers:
358
Citations:
1.7K

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