Defective in cullin neddylation 1 domain containing 2 (DCUN1D2)

Defective in cullin neddylation 1 domain containing 2 (DCUN1D2) is a member of the DCN1-like protein family, which serves as a cofactor stimulating the neddylation of cullin components of SCF-type E3 ubiquitin ligase complexes. DCUN1D2 contains two conserved domains: a C-terminal PONY domain essential for neddylation activation, and a predicted N-terminal ubiquitin-associated (UBA) domain mediating direct ubiquitin interaction[1][2][3]. It can bind cullin family proteins and positively regulate protein neddylation, thereby modulating activity of cullin-RING ligase complexes central to targeted protein ubiquitination and proteasomal degradation[2][3][5]. DCUN1D2 localizes to both nucleus and cytoplasm and is broadly expressed, with higher expression in specific tissues such as brain, muscle, and testis (specifically in spermatogonia and spermatocytes)[1][3][5]. While knockout studies in mice indicate DCUN1D2 is not essential for spermatogenesis or male fertility due to functional redundancy with other DCNL family members[1], perturbation of neddylation pathways (including those regulated by DCN1-like proteins) is relevant for cancer and possibly other diseases[3][5]. There are no known drugs directly targeting DCUN1D2, nor identified patient biomarkers or notable therapeutic safety concerns at present.

Other names

DCN1-like protein 2C13orf17DCUN1L2DCNL2FLJ10704FLJ20092DCUN1 domain-containing protein 2Defective in cullin neddylation protein 1-like protein 2