Intron-Based Single Transcript Unit CRISPR Systems for Plant Genome Editing
Intron-Based Single Transcript Unit CRISPR Systems for Plant Genome Editing
复制标题
用于植物基因组编辑的基于内含子的单转录单元 CRISPR 系统
DOI:
10.1186/s12284-020-0369-8
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发表时间:
2020-02
期刊:
影响因子:
5.5
通讯作者:
Zhang Yong
中科院分区:
文献类型:
--
作者:
Zhong Zhaohui;Liu Shishi;Liu Xiaopei;Liu Binglin;Tang Xu;Ren Qiurong;Zhou Jianping;Zheng Xuelian;Qi Yiping;Zhang Yong
BackgroundExpression of either Cas9 or Cas12a and guide RNAs by a single Polymerase II (Pol II) promoter represents a compact CRISPR expression system and has many advantages for different applications. In order to make this system routine in plant biology, engineering efforts are needed for developing and optimizing such single transcript unit (STU) systems for plant genome editing.ResultsTo develop novel intron-based STU (iSTU) CRISPR system (STU CRISPR 3.0), we first evaluated three introns from three plant species for carrying guide RNAs by using an enhanced green fluorescence protein (eGFP) system in rice. After validation of proper intron slicing, we inserted these gRNA-containing introns into the open reading frames (ORFs) of Cas9 and Cas12a for testing their genome editing capability. Different guide RNA processing strategies have been tested for Cas9 and Cas12a. We demonstrated singular genome editing and multiplexed genome editing with these iSTU-Cas9 and iSTU-Cas12a systems.ConclusionWe developed multiple iSTU-CRISPR/Cas9 and Cas12a systems for plant genome editing. Our results shed light on potential directions for further improvement of the iSTU systems.
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