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Cyclic nucleotide-gated channel alpha 1

Protein-coding gene in the species Homo sapiens From Wikipedia, the free encyclopedia

Cyclic nucleotide-gated channel alpha 1
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Cyclic nucleotide-gated channel alpha 1, also known as CNGA1, is a human gene encoding an ion channel protein.[5] Heterologously expressed CNGA1 can form a functional channel that is permeable to calcium.[6] In rod photoreceptors, however, CNGA1 forms a heterotetramer with CNGB1 in a 3:1 ratio.[7][8][9] The addition of the CNGB1 channel imparts altered properties including more rapid channel kinetics and greater cAMP-activated current.[10] When light hits rod photoreceptors, cGMP concentrations decrease causing rapid closure of CNGA1/B1 channels and, therefore, hyperpolarization of the membrane potential.

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