RPN1 and nonpapillary renal cell carcinoma: Among them, GYS1 and SLC7A11 were highly upregulated in ccRCC tissues, whereas LRPPRC, NCKAP1, NDUFA11, NDUFS1, NUBPL, OXSM, RPN1, and SLC3A2 were downregulated in ccRCC tissues.