Prognostic and immunological role of Ras-related protein Rap1b in pan-cancer.

Ras-related Protein , a GTP-binding protein belonging to the proximal RAS, which affects tumor progression through regulating tumor cell proliferation, invasion and participates in the functions of various immune cells. However, the potential roles and mechanisms of in tumor progression and immunology remains unclear. In this study, we systematically analyzed the pan-cancer expression and prognostic correlation of based on GTEX, CCLE, Oncomine, PrognoScan, Kaplan-Meier plotters and TCGA databases. The potential correlations of Rap1b with immune infiltration were revealed via TIMER and TCGA database. SangerBox database was used to analyzed the correlations between expression and immune checkpoint (ICP), tumor mutational burden (TMB), microsatellite instability (MSI), mismatch repairs (MMRs) and DNA methylation. The results indicated that the expression level of varies in different tumors. Meanwhile, the expression level of strongly correlated with prognosis in patients with tumors, higher expression of usually was linked to poor prognosis in different datasets. was correlated closely with tumor immunity and interacted with various immune cells in different types of cancers. In addition, there were significant positive correlations between Rap1b expression and ICP, TMB, MSI, MMRs and DNA methylation. In conclusion, the results of pan-cancer analysis showed that the abnormal expression was related to poor prognosis and tumor immune infiltration in different cancers. Furthermore, gene may be used as a potential biomarker of clinical tumor prognosis.