CRISPR (clustered regularly interspaced short palindromic repeats) arrays and their associated (Cas) proteins confer bacteria and archaea adaptive immunity against exogenous mobile genetic elements, such as phages or plasmids. CRISPRCasFinder [1] allows the identification of both CRISPR arrays and Cas proteins (identified by MacSyFinder).
The list of predicted systems in a selected strain can be accessed through the ‘Macromolecular Systems’ section of the ‘Comparative Genomics’ menu. A new CRISPR table displays all CRISPR detected by CRISPRCasFinder and all Cas detected by MacSyFinder.
Reference:
[1] Couvin D, et al. CRISPRCasFinder, an update of CRISRFinder, includes a portable version, enhanced performance and integrates search for Cas proteins. Nucleic Acids Res. 2018 Jul 2;46(W1):W246-W251.