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Voltage-gated potassium (Kv) channels may play an important role in the encoding of auditory information. Towards understanding the roles of Shaker and Shaw-like channels in this process, we examine here the expression of Kv1.1, Kv1.2, Kv3.1, and Kv3.3 in the central auditory nuclei of the mouse using quantitative in situ hybridization techniques. We establish rank order for each channel's expression...
Muscarine and somatostatin enhance an inward rectifier K + conductance in the AtT-20 pituitary cell line. Both effects are abolished by pertussis toxin (PTX). To determine which PTX-sensitive G protein mediates these agonist effects, we made cDNAs encoding mutant PTX-insensitive G iα subtypes, in which the cysteine residue fourth from the C terminus was replaced with serine...
Voltage-gated K+ channels are localized to juxtaparanodal regions of myelinated axons. To begin to understand the role of normal compact myelin in this localization, we examined mKv1.1 and mKv1.2 expression in the dysmyelinating mouse mutants shiverer and Trembler. In neonatal wild-type and shiverer mice, the focal localization of both proteins in axon fiber tracts is similar, suggesting that cues...
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