Cas6 is an endoribonuclease that generates guide RNAs for invader defense in prokaryotes
Carte, J., Wang, R., Li, H., Terns, R.M., Terns, M.P.(2008) Genes Dev 22: 3489-3496
- PubMed: 19141480 
- DOI: 10.1101/gad.1742908
- Primary Citation of Related Structures:  
3I4H - PubMed Abstract: 
An RNA-based gene silencing pathway that protects bacteria and archaea from viruses and other genome invaders is hypothesized to arise from guide RNAs encoded by CRISPR loci and proteins encoded by the cas genes. CRISPR loci contain multiple short invader-derived sequences separated by short repeats ...