The function of WRNIP1 (WRN helicase interacting protein 1, ENSG00000124535) is as follows. Functions as a modulator of initiation or reinitiation events during DNA polymerase delta-mediated DNA synthesis. In the presence of ATP, stimulation of DNA polymerase delta-mediated DNA synthesis is decreased. Also plays a role in the innate immune defense against viruses. Stabilizes the RIGI dsRNA interaction and promotes RIGI 'Lys- 63'-linked polyubiquitination. In turn, RIGI transmits the signal through mitochondrial MAVS. {ECO:0000269|PubMed:15670210, ECO:0000269|PubMed:29053956}.