Based on the CPTAC database, we conducted phosphorylation analysis and the analysis results showed that compared with normal samples, LUAD, lung squamous cell carcinoma (LUSC), PAAD and LIHC had higher phosphorylation degree in S46 site of UBA1 protein (Figure S7A–D) and kidney renal clear cell carcinoma (Clear cell RCC) had lower phosphorylation degree in S46 site of UBA1 protein (Figure S7E). Here, UBA1 is linked to squamous cell lung carcinoma.