Mar 29, 2020

Next-generation CRISPR-Cas for genome editing: focusing on the Cas protein and PAM

Yi chuan = Hereditas
Lian Chao Tang, Feng Gu

Abstract

The emergence of the gene editing technology, especial CRISPR-Cas (clustered regularly intersected short palindromic repeats and CRISPR associated proteins), has greatly promoted the ability of human beings to transform natural species. It has been widely harnessed for the engineering in the medical, industrial, agricultural and other fields. The key component of the CRISPR-Cas system, the Cas protein, possesses its specific features, including self-activity, recognition site, cutting end and guide RNA. PAM (protein assistant motif) is a number of nucleotides adjacent to the target site, which is very important for the Cas protein to recognize the target sequence and is also the key characteristic of CRISPR-Cas. There are several reported methods for identification of PAM. In this review, we summarize the searching for the Cas protein, the identification of Cas mutants with desired traits and the mapping of the PAM (including the extending of PAM spectrum), in order to provide a reference for the development and optimization of next-generation gene editing tools.

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Mentioned in this Paper

Species
Restriction Site
Mutant
Gene Editing
Massively-Parallel Sequencing
Clustered Regularly Interspaced Short Palindromic Repeats
Targeted Anatomic Site
CRISPR-Cas Systems
Nucleotides
Calcium

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