Potassium channel subfamily T, member 1, also known as KCNT1 or SLACK is a human gene that encodes the K<sub>Ca</sub>4.1 protein. K<sub>Ca</sub>4.1 is a member of the calcium-activated potassium channel protein family
Mutations in the KCNT1 gene has been shown to be a cause of Ohtahara syndrome and other congenital neurodegenerative diseases.