Employing libraries of zinc finger artificial transcription factors to screen for homologous recombination mutants in Arabidopsis
Article first published online: 7 SEP 2006
The Plant Journal
Volume 48, Issue 3, pages 475–483, November 2006
How to Cite
Lindhout, B. I., Pinas, J. E., Hooykaas, P. J.J. and Van Der Zaal, B. J. (2006), Employing libraries of zinc finger artificial transcription factors to screen for homologous recombination mutants in Arabidopsis. The Plant Journal, 48: 475–483. doi: 10.1111/j.1365-313X.2006.02877.x
- Issue published online: 27 SEP 2006
- Article first published online: 7 SEP 2006
- Received 16 March 2006; revised 23 June 2006; accepted 5 July 2006.
- zinc finger transcription factor libraries;
- Cys2His2 zinc finger;
- homologous recombination;
A library of genes for zinc finger artificial transcription factors (ZF-ATF) was generated by fusion of DNA sequences encoding three-finger Cys2His2 ZF domains to the VP16 activation domain under the control of the promoter of the ribosomal protein gene RPS5A from Arabidopsis thaliana. After introduction of this library into an Arabidopsis homologous recombination (HR) indicator line, we selected primary transformants exhibiting multiple somatic recombination events. After PCR-mediated rescue of ZF sequences, reconstituted ZF-ATFs were re-introduced in the target line. In this manner, a ZF-ATF was identified that led to a 200–1000-fold increase in somatic HR (replicated in an independent second target line). A mutant plant line expressing the HR-inducing ZF-ATF exhibited increased resistance to the DNA-damaging agent bleomycin and was more sensitive to methyl methanesulfonate (MMS), a combination of traits not described previously. Our results demonstrate that the use of ZF-ATF pools is highly rewarding when screening for novel dominant phenotypes in Arabidopsis.