Sodium/potassium/calcium exchanger 1
Definition:
Calcium, potassium:sodium antiporter that transports 1 Ca(2+) and 1 K(+) in exchange for 4 Na(+). Critical component of the visual transduction cascade, controlling the calcium concentration of outer segments during light and darkness. Light causes a rapid lowering of cytosolic free calcium in the outer segment of both retinal rod and cone photoreceptors and the light-induced lowering of calcium is caused by extrusion via this protein which plays a key role in the process of light adaptation.
References:
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[1]. S Amer Riazuddin, et al. A mutation in SLC24A1 implicated in autosomal-recessive congenital stationary night blindness. Am J Hum Genet. 2010 Oct 8;87(4):523-31. [Content Brief]
[2]. Ali H Jalloul, et al. Cation dependencies and turnover rates of the human K⁺-dependent Na⁺-Ca²⁺ exchangers NCKX1, NCKX2, NCKX3 and NCKX4. Cell Calcium. 2016 Jan;59(1):1-11. [Content Brief]
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