Component of the nuclear pore complex (NPC), a complex required for the trafficking across the nuclear envelope (Probable). Required for proper protein transport into the nucleus (PubMed:32275884). {ECO:0000269|PubMed:32275884, ECO:0000305|PubMed:32275884}. This is the function of NUP188 (nucleoporin 188, Ensembl gene identifier ENSG00000095319).