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Dual RMCE for efficient re-engineering of mouse mutant alleles

Abstract

We have developed dual recombinase-mediated cassette exchange (dRMCE) to efficiently re-engineer the thousands of available conditional alleles in mouse embryonic stem cells. dRMCE takes advantage of the wild-type loxP and FRT sites present in these conditional alleles and in many gene-trap lines. dRMCE is a scalable, flexible tool to introduce tags, reporters and mutant coding regions into an endogenous locus of interest in an easy and highly efficient manner.

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Figure 1: The principle of dRMCE to re-engineer mouse conditional alleles.
Figure 2: dRMCE for efficient modification of difficult-to-target loci.

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Acknowledgements

We are grateful to D. Klewe-Nebenius and T. Hennek (University of Basel) for generating the chimeric mice. We thank I. Verma (Salk Institute, San Diego, California, USA), B. Sauer (Stowers Institute, Kansas City, Missouri, USA), R. Jaenisch (Whitehead Institute, Cambridge, Massachusetts, USA) and P. Soriano (Mount Sinai School of Medicine, New York, New York, USA) for plasmids obtained via Addgene and A.-K. Hadjantonakis (Sloan-Kettering Institute, New York, New York, USA) for suggesting the use of the H2B-Venus fusion protein. We thank A. Schauerte and P. Lorentz for expert technical assistance and are indebted to P. Bovolenta, G. Nusspaumer, A. Zuniga and members of our research groups for helpful input and discussions. Our research is supported by the Swiss National Science Foundation (to R.Z.), by a Marie Curie Intra-European Fellowship and a European Reintegration Grant (to J.L.-R.) and by both cantons of Basel, Switzerland.

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Authors and Affiliations

Authors

Contributions

M.O., J.L.-R. and R.Z. conceived and designed the experiments. M.O., J.L.-R. and B.R. designed and constructed the dRMCE tool-kit vectors. B.R. and W.C.S. provided the IKMC mouse embryonic stem cell lines. M.O., A.G., J.L.-R. and B.R. performed the experiments. J.L.-R., W.C.S. and R.Z. wrote the paper.

Corresponding authors

Correspondence to Rolf Zeller or Javier Lopez-Rios.

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Competing interests

A dRMCE patent is pending.

Supplementary information

Supplementary Text and Figures

Supplementary Figures 1–5, Supplementary Tables 1 and 2 (PDF 8023 kb)

Supplementary Data

Vector sequences in GenBank format. (ZIP 30 kb)

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Osterwalder, M., Galli, A., Rosen, B. et al. Dual RMCE for efficient re-engineering of mouse mutant alleles. Nat Methods 7, 893–895 (2010). https://doi.org/10.1038/nmeth.1521

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