FEATURES

FAMILY

DESCRIPTION

Also known as CRYAB_HUMAN, CRYAB, CRYA2, HSPB5. May contribute to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions. Heteromer composed of three CRYAA and one CRYAB subunits (PubMed:20836128). Aggregates with homologous proteins, including the small heat shock protein HSPB1, to form large heteromeric complexes (PubMed:10751411). Inter-subunit bridging via zinc ions enhances stability, which is crucial as there is no protein turn over in the lens (PubMed:22890888). Interacts with HSPBAP1 and TTN/titin (PubMed:14676215). Interacts with TMEM109 (PubMed:23542032). Interacts with DES; binds rapidly during early stages of DES filament assembly and a reduced binding seen in the later stages (PubMed:28470624). Interacts with TMED10; the interaction mediates the translocation from the cytoplasm into the ERGIC (endoplasmic reticulum-Golgi intermediate compartment) and thereby secretion (PubMed:32272059).

EXTERNAL LINKS

CRYAB

Alpha-crystallin B chain

CRYAB

Molecular Synopsis