TRIM7 is an E3 ubiquitin ligase that functions as a multifaceted regulator of viral infection and cellular homeostasis. Primary function: TRIM7 promotes Zika virus replication by mediating K63-linked polyubiquitination of the viral envelope protein E, which enhances virus attachment and entry via interaction with the TIM1 host receptor 1. However, TRIM7 exhibits context-dependent antiviral activity against other viruses: it restricts enterovirus replication by targeting the viral 2BC protein for proteasomal degradation 2, and inhibits SARS-CoV-2 replication by ubiquitinating the viral membrane protein, protecting cells from apoptosis 3. Beyond viral pathogenesis, TRIM7 regulates ferroptosis through K48-linked ubiquitination of NCOA4 in glioblastoma 4 and suppresses gastric cancer tumorigenesis by targeting SLC7A11 for degradation, thereby inducing ferroptosis 5. The protein contains a conserved TRIM motif and C-terminal B30.2 domain that mediates substrate binding 6. Clinical significance: TRIM7 expression correlates with prognosis in glioblastoma and gastric cancer, making it a potential therapeutic target. The virus-host evolutionary dynamics suggest TRIM7-based interventions could limit viral adaptation.