The PPI network of DBT proteins in ccRCC was consequently analysed by the STRING website, and genes including BCAT2, BCKDHA, BCKDHB, DLD, IVD, OGDH, PCCA, PCCB, and PPM1K were screened (Figure 7A). The gene discussed is PCCA; the disease is nonpapillary renal cell carcinoma.