Cyclic nucleotide-gated channel subunit beta 3 (CNGB3)

Cyclic nucleotide-gated channel subunit beta 3 (CNGB3) is a regulatory subunit of cone CNG channels, which form heterotetramers composed typically of three CNGA3 subunits and one CNGB3 subunit in humans. These channels transduce chemical signals induced by light into electrical signals crucial for color vision. CNGB3 contributes to unique structural and functional properties of cone channels, influencing ion selectivity and channel gating. Mutations in CNGB3 are a major genetic cause of achromatopsia, a congenital inability to perceive color, and related degenerative retinal diseases. CNGB3 does not form functional channels on its own but modulates channel properties when assembled with CNGA3.

Other names

CNGB3ACHM1Cyclic nucleotide-gated channel beta 3Cyclic nucleotide gated channel subunit beta 3

Drugs or molecules that modulate CNG channels typically alter channel gating by binding or interfering with the cyclic nucleotide-binding domain, affecting ion flow and photoreceptor response.