Function
Involved in protein ubiquitination, but has no ubiquitin ligase activity on its own (PubMed:15530417). The uev-1-ubc-13 heterodimers catalyze the synthesis of non-canonical 'Lys-63'-linked polyubiquitin chains (PubMed:15530417, PubMed:24595290). Involved in sorting Lys-63-linked polyubiquitinated maternal membrane proteins for degradation by targeting to multivesicular bodies (PubMed:24595290). May be involved in the ubiquitination and growth of intracellular polyglutamine protein aggregates (PubMed:17663792, PubMed:22494772). May have a role in AMPA-type glutamate receptor trafficking in neurons (PubMed:21179194).