Potassium voltage-gated channel subfamily A member 1 also known as Kv1.1 is a shaker related voltage-gated potassium channel that in humans is encoded by the KCNA1 gene. The Isaacs syndrome is a result of an autoimmune reaction against the Kv1.1 ion channel.
The gene is located on the Watson (plus) strand of the short arm of chromosome 12 (12p13.32). The gene itself is 8,348 bases in length and encodes a protein of 495 amino acids (predicted molecular weight 56.466 kiloDaltons).
The recommended name for this protein is potassium voltage-gated channel subfamily A member 1 but a number of alternatives have been used in the literature including HuK1 (human K+ channel I), RBK1 (rubidium potassium channel 1), MBK (mouse brain K+ channel), voltage gated potassium channel HBK1, voltage gated potassium channel subunit Kv1.1, voltage-gated K+ channel HuKI and AEMK (associated with myokymia with periodic ataxia).