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