Substrate-recognition component of a Cul2-RING (CRL2 E3 ubiquitin-protein ligase complex of the DesCEND (destruction via C-end degrons pathway, which recognizes a C-degron located at the extreme C terminus of target proteins, leading to their ubiquitination and degradation. The C-degron recognized by the DesCEND pathway is usually a motif of less than ten residues and can be present in full-length proteins, truncated proteins or proteolytically cleaved forms. The CRL2(FEM1A complex specifically recognizes proteins with an arginine at the C-terminus: recognizes and binds proteins ending with -Lys/Arg-Xaa-Arg and -Lys/Arg-Xaa-Xaa-Arg C-degrons, such as SIL1 or OR51B2, leading to their ubiquitination and degradation. Promotes ubiquitination and degradation of SLBP. Involved in PGE2-EP4-mediated inhibition of inflammation of macrophages via interaction with NFKB1 and PTGER4 (By similarity. Promotes inflammation in brain microglia through MAP2K4/MKK4-mediated signaling (By similarity.