Enables ubiquitin protein ligase activity. Acts upstream of or within protein catabolic process and protein ubiquitination. Located in cytoplasm. Is expressed in several structures, including central nervous system; dorsal root ganglion; ear; genitourinary system; and liver. Orthologous to human PJA1 (praja ring finger ubiquitin ligase 1). [provided by Alliance of Genome Resources, Apr 2022]