FUCA1 (Alpha-L-Fucosidase 1): FUCA1 (Alpha-L-Fucosidase 1) is a gene that encodes an enzyme responsible for breaking down fucose, a sugar component found in complex carbohydrates. This enzyme plays a key role in metabolic processes, and deficiencies in FUCA1 can cause fucosidosis, a rare lysosomal storage disorder. Studying FUCA1 helps improve understanding of metabolic pathways and related disorders.