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Table 6 Characteristics of different types of CRISPR systems

From: Genome editing in cotton: challenges and opportunities

Characteristics

Type I

Type II

Type III

Type IV

Type V

Type VI

References

Effector complex

Multisubunit (Class 1)

Single unit (Class 2)

Multisubunit (Class 1)

Multisubunit (Class 1)

Single unit (Class 2)

Single unit (Class 2)

Zhuo et al. (2021)

Signature Protein

Cas3

Cas9

Cas10

Csf1

Cas12

Cas13

Wada et al. (2022)

Target molecule

DNA

DNA

RNA/DNA

DNA

DNA

RNA

Niu et al. (2021)

Details

Cleaves ssDNA strands

Originates blunt DSB

Binds to nascent RNA molecules

Most unknown CRISPR system

Originates staggered DSB

RNA-guided RNase

Gong et al. (2021)