Component of the ESCRT-I complex (endosomal sorting complex required for transport I), a regulator of vesicular trafficking process (PubMed:17090720). Required for the sorting of endocytic ubiquitinated cargos into multivesicular bodies (MVBs) (PubMed:17090720). May control nuclear division through the microtubule cytoskeleton (PubMed:17090720). Component of the endosomal sorting required for transport complex I (ESCRT-I), composed of ELC, VPS28 and VPS37 (PubMed:17090720). Interacts with VPS28 and VPS37 (PubMed:17090720). Binds ubiquitin in vitro (PubMed:17090720). Interacts with FREE1 (PubMed:25438943). Interacts with TOL9/TOM1D (PubMed:22639582). Interacts with BRO1/ALIX (PubMed:26902184, PubMed:17090720, PubMed:22639582, PubMed:25438943). Interacts with SINAT1, SINAT2, SINAT3 and SINAT4 (PubMed:32753431). Expressed in roots, stems, leaves and flowers. Ubiquitinated by SINAT1, SINAT2, SINAT3 and SINAT4 for subsequent proteasomal degradation. Clustered trichomes and multinucleated cells. Belongs to the ubiquitin-conjugating enzyme family. UEV subfamily.