Cullin homolog 1; Core component of multiple SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complexes which mediate the ubiquitination of proteins involved in cell cycle progression, signal transduction and transcription. In the SCF complex, serves as a rigid scaffold that organizes the SKP1-F-box protein and RBX1 subunits. May contribute to catalysis through positioning of the substrate and the ubiquitin- conjugating enzyme. During early metamorphosis, part of the SCF-slmb complex that negatively regulates the InR/PI3K/TOR pathway to activate the pruning of unnecessary larv [...]

NEDD8; Ubiquitin-like protein which plays an important role in cell cycle control, embryogenesis and neurogenesis. Covalent attachment to its substrates requires prior activation by the E1 complex Uba3-Ula1 and linkage to the E2 enzyme UbcE2M. Attachment of Nedd8 to cullins activates their associated E3 ubiquitin ligase activity, and thus promotes polyubiquitination and proteasomal degradation of cyclins and other regulatory proteins.

RING-box protein 1A; Core component of multiple SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complexes which mediate the ubiquitination of proteins involved in cell cycle progression, signal transduction and transcription. Through the RING-type zinc finger, seems to recruit the E2 ubiquitination enzyme to the complex and brings it into close proximity to the substrate. Required for the specific SCF-dependent proteolysis of CI, but not that of ARM, suggesting that it also participates in the selection of substrates inside the SCF complex. During early metamorphosis, part of [...]

Cullin 6; Ubiquitin-protein transferase activity; ubiquitin protein ligase binding; Belongs to the cullin family.

Cullin 3, isoform F; Ubiquitin protein ligase binding; molecular adaptor activity; ubiquitin-protein transferase activity; protein binding; Belongs to the cullin family.

FI20194p1; Cullin 5 (Cul5) is expressed in both neuronal and non-neuronal cells (such as in fusion sites of embryonic trachea). Reduction of the product of Cul5 in neuronal cells results in an increase in number of synaptic boutons in the larval neuromuscular junction; Belongs to the cullin family.

Nedd8-activating enzyme E1 catalytic subunit; Catalytic subunit of the dimeric Uba3-APP-BP1 E1 enzyme. E1 activates Nedd8 by first adenylating its C-terminal glycine residue with ATP, thereafter linking this residue to the side chain of the catalytic cysteine, yielding a Nedd8-Uba3 thioester and free AMP. E1 finally transfers Nedd8 to the catalytic cysteine of UbcE2M. Required for Cul1 and Cul3 neddylation. Negatively regulates full-length ci stability and hedgehog signaling.

RING-box protein 1B; Component of the SCF (SKP1-CUL1-F-box protein) E3 ubiquitin ligase complex, which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Through the RING-type zinc finger, seems to recruit the E2 ubiquitination enzyme to the complex and brings it into close proximity to the substrate (By similarity). Belongs to the RING-box family.

Cullin 2 (Cul2) encodes a protein that plays important roles during oogenesis. Reduction of the product of Cul2 in somatic cells produces tumorous germaria with excess germline stem cell-like cells due to the elevation of Dpp signaling in the niche; Belongs to the cullin family.