The function of USH1G (USH1 protein network component sans, Ensembl gene identifier ENSG00000182040) is as follows. Plays a role in pre-mRNA splicing by regulating the release and transfer of U4/U6.U5 tri-small nuclear ribonucleoprotein (tri- snRNP) complexes from their assembly site in Cajal bodies to nuclear speckles, thereby contributing to the assembly of the pre-catalytic spliceosome on target pre-mRNAs (PubMed:34023904). May also participate in recycling of snRNPs back to Cajal bodies during splicing (PubMed:34023904). Plays a role in regulating MAGI2-mediated endocytosis (PubMed:24608321). Anchoring/scaffolding protein that is a part of the functional network formed by USH1C, USH1G, CDH23 and MYO7A that mediates mechanotransduction in cochlear hair cells. Required for normal development and maintenance of cochlear hair cell bundles. Required for normal hearing. {ECO:0000269|PubMed:21709241, ECO:0000269|PubMed:24608321, ECO:0000269|PubMed:34023904}.