CRISPR-associated protein Cas7 is one of the components of the type I-B cascade-like antiviral defence complex. In Haloferax volcanii, Cas5, Cas6 and Cas7 form a small complex that aids the stability of CRISPR-derived RNA [1].

1: A complex of Cas proteins 5, 6, and 7 is required for the biogenesis and stability of clustered regularly interspaced short palindromic repeats (crispr)-derived rnas (crrnas) in Haloferax volcanii. Brendel J, Stoll B, Lange SJ, Sharma K, Lenz C, Stachler AE, Maier LK, Richter H, Nickel L, Schmitz RA, Randau L, Allers T, Urlaub H, Backofen R, Marchfelder A; J Biol Chem. 2014;289:7164-7177. PMID:24459147