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CRISPR-Cpf1 is a newly identified CRISPR-Cas system, and Cpf1 was recently engineered as a molecular tool for targeted genome editing in mammalian cells. To test whether the engineered CRISPR-Cpf1 system could induce the production of rice mutants, we selected two genome targets in the OsPDS and OsBEL genes. Our results show that both targets could be efficiently mutated in transgenic rice plants using CRISPR-Cpf1. We found that pre-crRNAs with a full-length direct repeat sequence exhibited considerably increased efficiencies compared with mature crRNAs. In addition, the specificity and transmission of the mutation were investigated, and the behaviours of crRNA-Cpf1-induced plant targeted genome mutagenesis were assessed. Taken together, our results indicate that CRISPR-Cpf1 expression via stable transformation can efficiently generate specific and heritable targeted mutations in rice and thereby constitutes a novel and important approach to specific and precise plant genome editing.
Pubmed ID: 27875019
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An interactive web application for visualizing genomic data of sequenced prokaryotic chromosomes. It allows users to carry out various analyses such as mapping alignments of homologous genes to other genomes, mapping of short sequencing reads to a reference chromosome, and calculating DNA properties such as curvature or stacking energy along the chromosome. The GeneWiz browser produces an interactive graphic that enables zooming from a global scale down to single nucleotides, without changing the size of the plot. Its ability to disproportionally zoom provides optimal readability and increased functionality compared to other browsers. The tool allows the user to select the display of various genomic features, color setting and data ranges. Custom numerical data can be added to the plot allowing, for example, visualization of gene expression and regulation data. Further, standard atlases are pre-generated for all prokaryotic genomes available in GenBank, providing a fast overview of all available genomes, including recently deposited genome sequences.
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