Efficient targeted integration directed by short homology in zebrafish and mammalian cells

Date
2020-01-01
Authors
Wierson, Wesley
Welker, Jordan
Almeida, Maira
Mann, Carla
Torrie, Melanie
Weiss, Trevor
Kambakam, Sekhar
Lan, Merrina
McKeighan, Kenna
Levey, Jacklyn
Ming, Zhitao
Wehmeier, Alec
Mikelson, Christopher
Haltom, Jeffrey
Dobbs, Drena
McGrail, Maura
Essner, Jeffrey
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Journal Issue
Series
Abstract

Efficient precision genome engineering requires high frequency and specificity of integration at the genomic target site. Here, we describe a set of resources to streamline reporter gene knock-ins in zebrafish and demonstrate the broader utility of the method in mammalian cells. Our approach uses short homology of 24–48 bp to drive targeted integration of DNA reporter cassettes by homology-mediated end joining (HMEJ) at high frequency at a double strand break in the targeted gene. Our vector series, pGTag (plasmids for Gene Tagging), contains reporters flanked by a universal CRISPR sgRNA sequence which enables in vivo liberation of the homology arms. We observed high rates of germline transmission (22–100%) for targeted knock-ins at eight zebrafish loci and efficient integration at safe harbor loci in porcine and human cells. Our system provides a straightforward and cost-effective approach for high efficiency gene targeting applications in CRISPR and TALEN compatible systems.

Description

This article is published as Wierson, Wesley A., Jordan M. Welker, Maira P. Almeida, Carla M. Mann, Dennis A. Webster, Melanie E. Torrie, Trevor J. Weiss et al. "Efficient targeted integration directed by short homology in zebrafish and mammalian cells." Elife 9 (2020): e53968. doi: 10.7554/eLife.53968.

Keywords
Citation
DOI
Collections