该基因编码一种含有层粘连蛋白EGF基序、五肽域和许多纤连蛋白III型基序的蛋白质。这种蛋白存在于基底膜，可能在内耳和视网膜的发育和稳态中起重要作用。该基因突变与Usher综合征IIA型和视网膜色素变性有关。已发现该基因编码不同亚型的多个转录变体。[由RefSeq提供，2008年12月]
This gene encodes a protein that contains laminin EGF motifs, a pentaxin domain, and many fibronectin type III motifs. The protein is found in the basement membrane, and may be important in development and homeostasis of the inner ear and retina. Mutations within this gene have been associated with Usher syndrome type IIa and retinitis pigmentosa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]