Is predicted to encode a protein with the following domains: Winged helix DNA-binding domain superfamily; PCI domain; Winged helix-like DNA-binding domain superfamily; 26S Proteasome non-ATPase regulatory subunit 12/COP9 signalosome complex subunit 4; Proteasome component (PCI) domain; and COP9 signalosome complex subunit 4. Is an ortholog of C. elegans csn-4.