Predicted to enable chromatin binding activity and ubiquitin-protein transferase activity. Predicted to be involved in protein autoubiquitination; protein monoubiquitination; and regulation of DNA replication. Predicted to act upstream of or within positive regulation of mRNA splicing, via spliceosome. Predicted to be located in chromatin. Orthologous to human OBI1 (ORC ubiquitin ligase 1). [provided by Alliance of Genome Resources, Apr 2022]