Ubiquitin-conjugating enzyme E2 S; Catalyzes the covalent attachment of ubiquitin to other proteins. Acts as an essential factor of the anaphase promoting complex/cyclosome (APC/C), a cell cycle-regulated ubiquitin ligase that controls progression through mitosis. Acts by specifically elongating polyubiquitin chains initiated by the E2 enzyme vih/UbcH10 on APC/C substrates, enhancing the degradation of APC/C substrates by the proteasome and promoting mitotic exit.

WD repeat-containing protein 26 homolog; G-beta-like protein involved in cell signal transduction (By similarity).

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.

Polyubiquitin; Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-48-linked is involved in protein degradatio [...]

E3 ubiquitin-protein ligase hyd; E3 ubiquitin-protein ligase which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates (By similarity). Required for regulation of cell proliferation in imaginal disks and germ cells. Acts as a negative regulator of hh, ci and dpp expression in the anterior of the eye disk.

Ubiquitin-5E, isoform A; Protein tag; ubiquitin protein ligase binding. It is involved in the biological process described with: ubiquitin-dependent protein catabolic process; protein ubiquitination; modification-dependent protein catabolic process; cellular protein modification process.

Wings apart-like (wapl) encodes a protein that interacts with the product of pds5 to form the releasin complex that enables sister chromatid separation at mitosis by removing the cohesin ring complex from chromosomes. It also influences gene activation and silencing through interactions with cohesin.

Modifier of rpr and grim, ubiquitously expressed (morgue) encodes an F box/ubiquitin conjugase domain protein. It regulates cell death by controlling the levels of the apoptosis inhibitor encoded by Diap1.

E3 ubiquitin-protein ligase Ufd4; E3 ubiquitin-protein ligase which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates (By similarity). Involved in the negative regulation of the Ras/MAPK signaling pathway in the wing by acting with the E2 enzyme Unc6 and the putative E3 ligases poe and Kcmf1 to mediate the ubiquitination and proteasomal degradation of rl/MAPK.