From Proteopedia
			
												
			proteopedia linkproteopedia link | SEE CRISPR-Cas Part I
 
 Summary of the most extensively characterized CRISPR endoribonucleases[1][2]
 Representatives of class 1 and class 2
Class 1 CRISPR-Cas systems are considered to be the evolutionary ancestral systems. The class 2 systems have evolved from class 1 systems via the insertion of transposable elements encoding various nucleases, and are now being used as tools for genome editing.[2]
 
 (4qyz).
  (3x1l).
 
 (5f9r).
  5b43.
 
 Class 1
 CRISPR subtype III-B (Cmr complex)
 CRISPR subtype Orphan
- TthCas6A (TTHB78) from T. thermophilus.  (4c8z). Other representatives: 4c8y, 4c97.
  
 CRISPR type IV (Csf1)
 Class 2
 CRISPR type VI (C2c2)
 See aslo
 | 
  References 
- ↑ Hochstrasser ML, Doudna JA. Cutting it close: CRISPR-associated endoribonuclease structure and function. Trends Biochem Sci. 2015 Jan;40(1):58-66. doi: 10.1016/j.tibs.2014.10.007. Epub, 2014 Nov 18. PMID:25468820 doi:http://dx.doi.org/10.1016/j.tibs.2014.10.007
 
- ↑ 2.0 2.1 Mohanraju P, Makarova KS, Zetsche B, Zhang F, Koonin EV, van der Oost J. Diverse evolutionary roots and mechanistic variations of the CRISPR-Cas systems. Science. 2016 Aug 5;353(6299):aad5147. doi: 10.1126/science.aad5147. PMID:27493190 doi:http://dx.doi.org/10.1126/science.aad5147