The application belongs to the technical field of
gene editing, and particularly relates to a recombinant vector, a
cell and a
Saccharomyces cerevisiae
genome editing method based on a TIGR-Tas
system. The application provides a recombinant vector, which can realize efficient multiple
genome editing in a
Saccharomyces cerevisiae
cell through the cooperation of a TasR
protein and double-spaced
guide RNA. The TasR
protein has a small molecular weight, a high expression efficiency in a
eukaryotic cell and precise
DNA cleavage activity. The double-spaced
guide RNA uses double-spaced sequences to simultaneously recognize double strands of target
DNA, and is completely independent of a PAM sequence, thereby breaking the
bottleneck that
CRISPR-Cas9 cannot be targeted due to PAM limitation. Experiments prove that the vector can realize efficient editing on multiple
yeast endogenous sites (ADE2, CAN1, LYP1) without any PAM screening, has a high editing efficiency, and particularly provides a feasible editing scheme for an AT-rich
genome region (such as a
yeast promoter region).