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Subunit: Forms neddylation-dependent homodimers. Component of multiple BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complexes formed of CUL3, RBX1 and a variable BTB domain-containing protein acting as both, adapter to cullin and substrate recognition subunit. The BCR complex may be active as a heterodimeric complex, in which NEDD8, covalently attached to one CUL3 molecule, binds to the C-terminus of a second CUL3 molecule. Interacts with RBX1, RNF7, CYCE and TIP120A/CAND1. Part of the BCR(SPOP) containing SPOP, and of BCR containing homodimeric SPOPL or the heterodimer formed by SPOP and SPOPL. Part of the probable BCR(KLHL9-KLHL13) complex with BTB domain proteins KLHL9 and KLHL13. Part of the BCR(KLHL41) complex containing KLHL41. Component of the BCR(KLHL12) E3 ubiquitin ligase complex, at least composed of CUL3 and KLHL12 and RBX1. Component of the BCR(KLHL3) E3 ubiquitin ligase complex, at least composed of CUL3 and KLHL3 and RBX1 (Probable). Part of the BCR(ENC1) complex containing ENC1. Part of a complex consisting of BMI1/PCGF4, CUL3 and SPOP. Part of a complex consisting of BRMS1, CUL3 and SPOP. Component of the BCR(KLHL21) E3 ubiquitin ligase complex, at least composed of CUL3, KLHL21 and RBX1. Component of the BCR(KLHL22) E3 ubiquitin ligase complex, at least composed of CUL3, KLHL22 and RBX1. Component of the BCR(KLHL25) E3 ubiquitin ligase complex, at least composed of CUL3, KLHL25 and RBX1. Part of a complex consisting of H2AFY, CUL3 and SPOP. Component of the BCR(KLHL42) E3 ubiquitin ligase complex, at least composed of CUL3 and KLHL42. Interacts with KLHL42 (via the BTB domain). Interacts with KATNA1; the interaction is enhanced by KLHL42. Interacts with KCTD5, KLHL9, KLHL11, KLHL13, GAN, ZBTB16, KLHL3, KLHL15, KLHL20, KLHL36, GMCL1P1, BTBD1. Part of a complex that contains CUL3, RBX1 and GAN. Interacts (via BTB domain) with KLHL17; the interaction regulates surface GRIK2 expression. Interacts with KCTD7. Part of the BCR(GAN) complex containing GAN. Part of the BCR(KEAP1) complex containing KEAP1. Interacts with KLHL10 (By similarity). Interacts with KAT5 and ATF2 Sequence caution: Sequence=AAC28621.1; Type=Frameshift; Positions=452; Sequence=AAC36682.1; Type=Frameshift; Positions=159, 179; Sequence=BAA31592.2; Type=Erroneous initiation; Note=Translation N-terminally shortened; 4 PDB 3D structures from [IMAGE] and Proteopedia [IMAGE] for CUL3: 4AP2 (3D) [IMAGE] 4APF (3D) [IMAGE] 4EOZ (3D) [IMAGE] 4HXI (3D) [IMAGE]
Tissue specificity: Widely expressed [IMAGE] Pathway & Disease-focused RT2 Profiler PCR Arrays including CUL3: Ubiquitination (Ubiquitylation) Pathway in human mouse rat Cell Cycle in human mouse rat Apoptosis 384HT in human mouse rat Ubiquitin Ligases in human mouse rat Pri
Function: UniProtKB/Swiss-Prot Summary: CUL3_HUMAN, Q13618 Function: Core component of multiple cullin-RING-based BCR (BTB-CUL3-RBX1) 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 E3 ubiquitin-protein ligase activity of the complex is dependent on the neddylation of the cullin subunit and is inhibited by the association of the deneddylated cullin subunit with TIP120A/CAND1 (By similarity). The functional specificity of the BCR complex depends on the BTB domain-containing protein as the substrate recognition component. BCR(KLHL42) is involved in ubiquitination of KATNA1. BCR(SPOP) is involved in ubiquitination of BMI1/PCGF4, BRMS1, H2AFY and DAXX, GLI2 and GLI3. Can also form a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex containing homodimeric SPOPL or the heterodimer formed by SPOP and SPOPL; these complexes have lower ubiquitin ligase activity. BCR(KLHL9-KLHL13) controls the dynamic behavior of AURKB on mitotic chromosomes and thereby coordinates faithful mitotic progression and completion of cytokinesis. BCR(KLHL12) is involved in ER-Golgi transport by regulating the size of COPII coats, thereby playing a key role in collagen export, which is required for embryonic stem (ES) cells division: BCR(KLHL12) acts by mediating monoubiquitination of SEC31 (SEC31A or SEC31B). BCR(KLHL3) acts as a regulator of ion transport in the distal nephron; by mediating ubiquitination of WNK4. The BCR(KLHL21) E3 ubiquitin ligase complex regulates localization of the chromosomal passenger complex (CPC) from chromosomes to the spindle midzone in anaphase and mediates the ubiquitination of AURKB. The BCR(KLHL22) ubiquitin ligase complex mediates monoubiquitination of PLK1, leading to PLK1 dissociation from phosphoreceptor proteins and subsequent removal from kinetochores, allowing silencing of the spindle assembly checkpoint (SAC) and chromosome segregation. The BCR(KLHL25) ubiquitin ligase complex is involved in translational homeostasis by mediating ubiquitination and subsequent degradation of hypophosphorylated EIF4EBP1 (4E-BP1). Involved in ubiquitination of cyclin E and of cyclin D1 (in vitro) thus involved in regulation of G1/S transition. Involved in the ubiquitination of KEAP1, ENC1 and KLHL41. In concert with ATF2 and RBX1, promotes degradation of KAT5 thereby attenuating its ability to acetylate and activate ATM
Similarity: Belongs to the cullin family [IMAGE]
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