Enables phosphatidylserine binding activity; ubiquitin conjugating enzyme binding activity; and ubiquitin protein ligase activity. Involved in several processes, including muscle organ development; plasma membrane repair; and protein homooligomerization. Acts upstream of or within negative regulation of myotube differentiation; negative regulation of signal transduction; and proteasome-mediated ubiquitin-dependent protein catabolic process. Located in cytoplasmic vesicle membrane and sarcolemma. Is expressed in heart; heart left ventricle; heart right ventricle; left atrium; and right atrium. Orthologous to human TRIM72 (tripartite motif containing 72). [provided by Alliance of Genome Resources, Apr 2022]