Retinal-Specific ATP-Binding Cassette Transporter (ABCA4) Antibody

Background

ABCA4, also known as the photoreceptor-specific ABC transporter, is expressed in retinal photoreceptor cells, where it facilitates the transport of all-trans-retinal derivatives across photoreceptor disc membranes. This activity is vital for the visual cycle, as it prevents the accumulation of toxic retinoid byproducts that can damage photoreceptors. ABCA4 mutations are linked to several retinal degenerative diseases, including Stargardt disease, cone-rod dystrophy, and retinitis pigmentosa. Structurally, ABCA4 contains two transmembrane and two nucleotide-binding domains, characteristic of ABC transporters, which utilize ATP hydrolysis for substrate translocation. The proper function of ABCA4 is critical for maintaining retinal health and visual function, making it a target for therapeutic interventions in retinal disorders.