The function of Ensembl gene identifier ENSG00000125864 (BFSP1, beaded filament structural protein 1) is as follows. Required for the correct formation of lens intermediate filaments as part of a complex composed of BFSP1, BFSP2 and CRYAA (PubMed:28935373). Involved in altering the calcium regulation of MIP water permeability (PubMed:30790544). {ECO:0000269|PubMed:28935373, ECO:0000269|PubMed:30790544}.