Ubiquitin-conjugating enzyme E2 that is essential for peroxisome biogenesis and plays a key role in development, pathogenicity, and cell wall integrity (PubMed:30603875). Required for long and very long-chain fatty acid utilization and is involved in lipid droplet accumulation and the elimination of reactive oxygen species (PubMed:30603875). Controls the expression of proteins involved in protein biosynthesis, fatty acid metabolism, cell wall synthesis, oxidation-reduction reactions, as well as of the enzymes involved in the biosynthesis of the mycotoxin deoxynivalenol (DON), including TRI5, TRI6, and TRI10 (PubMed:30603875). S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine + [E2 ubiquitin-conjugating enzyme]-L-cysteine = [E1 ubiquitin-activating enzyme]-L-cysteine + S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine. Protein modification; protein ubiquitination. Impairs hyphal growth, conidiation, conidial germination, and sexual reproduction (PubMed:30603875). Leads to a defect in pathogenicity and production of the mycotoxin deoxynivalenol (DON) (PubMed:30603875). Displays lipid droplet accumulation (PubMed:30603875). Shows reduced tolerance towards oxidative stress (PubMed:30603875). Leads to down-regulation of protein expression levels related to protein biosynthesis, fatty acid metabolism, cell wall synthesis, and oxidation-reduction reactions (PubMed:30603875). Belongs to the ubiquitin-conjugating enzyme family.