CRYBB2

CRYBB2 (Crystallin Beta B2) is a Protein Coding gene. Diseases associated with CRYBB2 include Cataract 3, Multiple Types and Cerulean Cataract. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and structural molecule activity. An important paralog of this gene is CRYBB3.

Crystallin Beta B2

Crystallins are the dominant structural components of the vertebrate eye lens.

Lens development in camera-type eye Source: GO_Central
Response to stimulus Source: UniProtKB-KW
Visual perception Source: GO_Central

Cataract 3, multiple types (CTRCT3):
An opacification of the crystalline lens of the eye that frequently results in visual impairment or blindness. Opacities vary in morphology, are often confined to a portion of the lens, and may be static or progressive. CTRCT3 includes congenital cerulean and sutural cataract with punctate and cerulean opacities, among others. Cerulean cataract is characterized by peripheral bluish and white opacifications organized in concentric layers with occasional central lesions arranged radially. The opacities are observed in the superficial layers of the fetal nucleus as well as the adult nucleus of the lens. Involvement is usually bilateral. Visual acuity is only mildly reduced in childhood. In adulthood, the opacifications may progress, making lens extraction necessary. Histologically the lesions are described as fusiform cavities between lens fibers which contain a deeply staining granular material. Although the lesions may take on various colors, a dull blue is the most common appearance and is responsible for the designation cerulean cataract. Sutural cataract with punctate and cerulean opacities is characterized by white opacification around the anterior and posterior Y sutures, and grayish and bluish, spindle shaped, oval punctate and cerulean opacities of various sizes arranged in lamellar form. The spots are more concentrated towards the peripheral layers and do not delineate the embryonal or fetal nucleus. Phenotypic variation with respect to the size and density of the sutural opacities as well as the number and position of punctate and cerulean spots is observed among affected subjects.