Directed evolution of a compact TranC11a system for efficient genome editing
Zhu, Z.; Gao, Q.; Gao, Q.; Jia, H.; Wang, Z.; He, M.; Li, L.; Zhang, L.; Li, S.; Jin, S.; Gao, C.; Zhao, K. T.
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The recently discovered TranC systems represent programmable RNA-guided DNA endonucleases of transposon origin with compact protein sizes ideal for therapeutic delivery. However, their editing efficiency in human and plant cells is limited. Here, we evolved TranC11a and engineered its sgRNA to enhance overall editing efficiencies. TranC11a systems exhibit up to 9.2-fold higher editing activity than its parent and achieves efficiency comparable to SpCas9 across multiple human genome endogenous sites, significantly outperforming compact editors NovaIscB and enTnpB1c. TranC11a enables efficient editing of disease-relevant genes in human cells and breeding traits in maize. With its high editing activity and compact size (574 aa), TranC11a demonstrates strong potential for future in vivo genome editing and crop engineering.
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