Crystallin beta B3 (CRYBB3)

Crystallin beta B3 (CRYBB3) is a water-soluble structural protein and a member of the β-crystallin family, forming part of the highly concentrated protein matrix in the vertebrate eye lens[1][4][7]. Together with other β- and γ-crystallins, it provides the lens with its transparency and high refractive index that allow focus of light onto the retina, critical for vision[1][4]. The β-crystallins form a diverse group of proteins comprising acidic (βA) and basic (βB) subunits; CRYBB3 functions as a structural component rather than an enzyme, receptor, or transporter[1][4][7]. Mutations in CRYBB3 are known to cause autosomal recessive congenital cataracts by promoting protein aggregation that scatters light, leading to lens opacity (cataract)[5][7]. There are no known drugs directly targeting CRYBB3, and it is not considered a biomarker or safety-relevant target for therapy. It is not currently studied as a therapeutic target in clinical pharmacology, but it is of diagnostic significance in genetic forms of cataract[5][7].

Other names

Beta-crystallin B3βB3-crystallinCRYB3CATCN2CTRCT22beta-B3 crystallineye lens structural protein