Optimized CRISPR-Cpf1 system for genome editing in zebrafish.
Optimized CRISPR-Cpf1 system for genome editing in zebrafish.
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DOI:
10.1016/j.ymeth.2018.06.014
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发表时间:
2018-11-01
期刊:
影响因子:
--
通讯作者:
Moreno-Mateos MA
中科院分区:
文献类型:
--
作者:
Fernandez JP;Vejnar CE;Giraldez AJ;Rouet R;Moreno-Mateos MA
The CRISPR-Cas9 system biotechnological impact has recently broadened the genome editing toolbox available to different model organisms further with the addition of new efficient CRISPR-based endonucleases. We have recently optimized CRISPR-Cpf1 (renamed Cas12a) system in zebrafish. We showed that i) in the absence of Cpf1 protein, crRNAs are unstable and degraded in vivo, and CRISPR-Cpf1 RNP complexes efficiently mutagenize the zebrafish genome; and ii) temperature modulates Cpf1 activity especially affecting AsCpf1, which experiences a reduced performance below 37°C. Here, we describe a step-by-step protocol on how to easily design and generate crRNAs in vitro, purify recombinant Cpf1 proteins, and assemble ribonucleoprotein complexes to carry out efficient mutagenesis in zebrafish in a constitutive and temperature-controlled manner. Finally, we explain how to induce Cpf1-mediated homology-directed repair using single-stranded DNA oligonucleotides. In summary, this protocol includes the steps to efficiently modify the zebrafish genome and other ectothermic organisms using the CRISPR–Cpf1 system.
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