Predicted to enable guanyl-nucleotide exchange factor activity. Predicted to be involved in regulation of ARF protein signal transduction and regulation of catalytic activity. Predicted to act upstream of or within ubiquitin-dependent protein catabolic process. Predicted to be part of ubiquitin ligase complex. Orthologous to human FBXO8 (F-box protein 8). [provided by Alliance of Genome Resources, Apr 2022]