SCN5A(sodium channel protein type 5 subunit alpha)またはNaV1.5は膜内在性タンパク質(英語版)であり、テトロドトキシン抵抗性電位依存性ナトリウムチャネルサブユニットの1つである。NaV1.5は主に心筋に存在しており、そこでは細胞膜を越えるナトリウムイオンの急速な流入(INa)を媒介し、心筋の活動電位の急速脱分極相(0相)を引き起こす。このように、NaV1.5は刺激伝導系において主要な役割を果たしている。NaV1.5の変異と関連した心臓疾患には多くの種類が存在する。
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関連文献
“Inherited sodium channelopathies: a continuum of channel dysfunction”.Trends in Cardiovascular Medicine14(1): 28–35.(January 2004).doi:10.1016/j.tcm.2003.10.001.PMID14720472.
“International Union of Pharmacology. XLVII. Nomenclature and structure-function relationships of voltage-gated sodium channels”.Pharmacological Reviews57(4): 397–409.(December 2005).doi:10.1124/pr.57.4.4.PMID16382098.
“Inherited conduction system abnormalities--one group of diseases, many genes”.Journal of Cardiovascular Electrophysiology17(4): 446–455.(April 2006).doi:10.1111/j.1540-8167.2006.00427.x.PMID16643374.