Victoria Baronas

Abstract Kv1.2 is a prominent ion channel in the CNS, where it regulates neuronal excitability. Kv1.2 structure and function are well understood, but there is less consensus on mechanisms of regulation of Kv1.2 and other potassium channels by auxiliary proteins. We identified novel regulators of Kv1.2 by a mass spectrometry approach. The neutral amino acid transporter Slc7a5 causes a dramatic hyperpolarizing shift of channel activation.

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Abstract Shaker potassium channels have been an essential model for studying inactivation of ion channels, and shaped our earliest understanding of N-type vs. C-type mechanisms. In early work describing C-type inactivation, López-Barneo and colleagues systematically characterized numerous mutations of Shaker residue T449, demonstrating that this position was a key determinant of C-type inactivation rate.