UBA2 and neoplasm: By analyzing the differential expression of SUMOylation regulators in OSCC between tumor tissues and normal tissues, we found that the 11 genes including PIAS3, RANBP2, USPL1, SENP6, SENP2, SENP5, SAE1, UBA2, PIAS4, UBE2I, and SENP3 were highly expressed.