Enables nucleic acid binding activity and p53 binding activity. Involved in several processes, including negative regulation of apoptotic process; negative regulation of insulin receptor signaling pathway; and regulation of transcription by RNA polymerase II. Located in several cellular components, including dendrite; neuronal cell body; and perinuclear region of cytoplasm. Part of messenger ribonucleoprotein complex. Biomarker of myocardial infarction. Orthologous to human YBX1 (Y-box binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]