The function of ZSWIM8 (zinc finger SWIM-type containing 8, ENSG00000214655) is as follows. Substrate recognition component of a SCF-like E3 ubiquitin- protein ligase complex that promotes target-directed microRNA degradation (TDMD), a process that mediates degradation of microRNAs (miRNAs) (PubMed:33184234, PubMed:33184237). The SCF-like E3 ubiquitin- protein ligase complex acts by catalyzing ubiquitination and subsequent degradation of AGO proteins (AGO1, AGO2, AGO3 and/or AGO4), thereby exposing miRNAs for degradation (PubMed:33184234, PubMed:33184237). Specifically recognizes and binds AGO proteins when they are engaged with a TDMD target (PubMed:33184234). May also act as a regulator of axon guidance: specifically recognizes misfolded ROBO3 and promotes its ubiquitination and subsequent degradation (PubMed:24012004). Plays an essential role for proper embryonic development of heart and lung (By similarity). Controls protein quality of DAB1, a key signal molecule for brain development, thus protecting its signaling strength. Mechanistically, recognizes intrinsically disordered regions of DAB1 and eliminates misfolded DAB1 that cannot be properly phosphorylated (By similarity). {ECO:0000250|UniProtKB:Q3UHH1, ECO:0000269|PubMed:24012004, ECO:0000269|PubMed:33184234, ECO:0000269|PubMed:33184237}. (Microbial infection) Participates in Zika virus inhibition of IFN signaling by acting as a scaffold protein to connect ZSWIM8/CUL3 ligase complex and STAT2, leading to STAT2 degradation. .