Predicted to enable adenyl-nucleotide exchange factor activity and ubiquitin protein ligase binding activity. Predicted to be involved in positive regulation of proteasomal ubiquitin-dependent protein catabolic process and positive regulation of protein ubiquitination. Orthologous to human HSPBP1 (HSPA (Hsp70) binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]