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Induction of T-DNA amplification by retrotransposon-derived sequences by Lauren Dickinson; Wenxin Yuan; Chantal LeBlanc; Geoffrey Thomson; Siyuan Wang; Yannick Jacob is a scholarly article available to read on EtoBox.

What is Induction of T-DNA amplification by retrotransposon-derived sequences about?

Transformation via __Agrobacterium tumefaciens__ (Agrobacterium) is the predominant method used to introduce exogenous DNA into plants. Transfer DNA (T-DNA) originating from Agrobacterium can be integrated as a single copy or in concatenated forms in plant genomes, but the mechanisms affecting final T-DNA structure remain unknown. In this study, we demonstrate that the inclusion of retrotransposon (RT)-derived sequences in T-DNA can increase transgene copy number by more than 50-fold in __Arabidopsis thaliana__ (Arabidopsis). RT-mediated amplification of T-DNA results in large concatemers in the Arabidopsis genome, which are primarily induced by the long terminal repeats (LTRs) of RTs. T-DNA amplification is dependent on the activity of DNA repair proteins associated with theta-mediated end joining (TMEJ). Finally, we show that T-DNA amplification can increase the frequency of targeted mutagenesis and gene targeting. Overall, this work uncovers molecular determinants that modulate T-DNA copy number in Arabidopsis and demonstrates the utility of inducing T-DNA amplification for plant gene editing.

Author

Lauren Dickinson; Wenxin Yuan; Chantal LeBlanc; Geoffrey Thomson; Siyuan Wang; Yannick Jacob

Publisher

Cold Spring Harbor Laboratory

Published

2023

Language

EN