Recombinant Cullin-2 (cul-2), partial

Core component of multiple cullin-RING-based CBC (Cul2-ElonginB-ElonginC) E3 ubiquitin-protein ligase complexes which mediate the ubiquitination and subsequent proteasomal degradation of target proteins. As a scaffold protein may contribute to catalysis through positioning of the substrate and the ubiquitin-conjugating enzyme. The functional specificity of the CBC complex depends on the variable substrate recognition component. May function in ubiquitin-mediated degradation of CKIs to target cki-1 for degradation. CBC(zif-1) may ensure germline precursor cell asymmetry by targeting germline proteins for destruction if expressed in non-germline cells. As part of the CBC(fem-1) complex directs ubiquitination of tra-1. As part of the CBC(lrr-1) complex, required for the ubiquitination and dissasembly of the CMG helicase complex from chromatin at the end of DNA replication. Positive cell-cycle regulator that is required at two distinct points in the cell cycle; the G1-to-S-phase transition and mitosis. Also required for proper cytoskeletal movement and mitotic chromosome condensation.