Enables ubiquitin protein ligase binding activity. Involved in cellular response to DNA damage stimulus. Located in centrosome; cytoplasm; and nuclear inclusion body. Part of nucleosome. Is expressed in cerebral cortex marginal layer and medulla oblongata basal plate mantle layer. Orthologous to human SLF1 (SMC5-SMC6 complex localization factor 1). [provided by Alliance of Genome Resources, Apr 2022]