RGD Reference Report - New modulatory alpha subunits for mammalian Shab K+ channels. - Rat Genome Database

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New modulatory alpha subunits for mammalian Shab K+ channels.

Authors: Salinas, M  Duprat, F  Heurteaux, C  Hugnot, JP  Lazdunski, M 
Citation: Salinas M, etal., J Biol Chem 1997 Sep 26;272(39):24371-9.
RGD ID: 737625
Pubmed: (View Article at PubMed) PMID:9305895

Two novel K+ channel alpha subunits, named Kv9.1 and Kv9.2, have been cloned. The Kv9.2 gene is situated in the 8q22 region of the chromosome. mRNAs for these two subunits are highly and selectively expressed in the nervous system. High levels of expressions are found in the olfactory bulb, cerebral cortex, hippocampal formation, habenula, basolateral amygdaloid nuclei, and cerebellum. Interestingly Kv9.1 and Kv9.2 colocalized with Kv2.1 and/or Kv2.2 alpha subunits in several regions of the brain. Neither Kv9.1 nor Kv9.2 have K+ channel activity by themselves, but both modulate the activity of Kv2.1 and Kv2.2 channels by changing kinetics and levels of expression and by shifting the half-inactivation potential to more polarized values. This report also analyzes the changes in electrophysiological properties of Kv2 subunits induced by Kv5.1 and Kv6.1, two other modulatory subunits. Each modulatory subunit has its own specific properties of regulation of the functional Kv2 subunits, and they can lead to extensive inhibitions, to large changes in kinetics, and/or to large shifts in the voltage dependencies of the inactivation process. The increasing number of modulatory subunits for Kv2.1 and Kv2.2 provides an amazingly new capacity of functional diversity.


Gene Ontology Annotations    

Biological Process

Cellular Component

Molecular Function

Objects Annotated

Genes (Rattus norvegicus)
Kcnb1  (potassium voltage-gated channel subfamily B member 1)
Kcnb2  (potassium voltage-gated channel subfamily B member 2)
Kcng1  (potassium voltage-gated channel modifier subfamily G member 1)

Objects referenced in this article
Gene KCNS1 potassium voltage-gated channel modifier subfamily S member 1 Homo sapiens
Gene KCNS2 potassium voltage-gated channel modifier subfamily S member 2 Homo sapiens
Gene Kcns1 K+ voltage-gated channel, subfamily S, 1 Mus musculus

Additional Information