GNAT2 : G protein subunit alpha transducin 2
Description
The GNAT2 (G protein subunit alpha transducin 2) is a protein-coding gene located on chromosome 1.
The GNAT2 gene provides instructions for making a part of the protein transducin, specifically the cone-specific alpha subunit. Transducin is found in cone cells, photoreceptor cells in the retina responsible for color vision and vision in bright light. Transducin plays a crucial role in transmitting visual signals from the retina to the brain through a process called phototransduction. This process begins with the absorption of light by photopigments in the photoreceptor cells. The activated photopigments then activate transducin, triggering a series of chemical reactions within the cell. These reactions modify the cell's electrical charge, ultimately generating a signal that the brain interprets as vision.
GNAT2 encodes for the alpha subunit of transducin, a G protein essential for visual signal transduction in the retina. Transducin acts as an amplifier and transducer, coupling the activation of rhodopsin (a light-sensitive pigment) to the activation of cGMP-phosphodiesterase, a key enzyme in phototransduction.
GNAT2 is also known as ACHM4, GNATC, HG1D.
