KCNMB4

KCNMB4
Identifiers
Aliases	KCNMB4, potassium calcium-activated channel subfamily M regulatory beta subunit 4
External IDs	OMIM: 605223 MGI: 1913272 HomoloGene: 8721 GeneCards: KCNMB4
Gene location (Human)
Chr.	Chromosome 12 (human)
End	70,434,292 bp
Gene location (Mouse)
Chr.	Chromosome 10 (mouse)
End	116,309,783 bp
RNA expression pattern
	Top expressed in
	endothelial cell; ; postcentral gyrus; ; entorhinal cortex; ; hippocampus proper; ; corpus callosum; ; superior frontal gyrus; ; middle temporal gyrus; ; external globus pallidus; ; prefrontal cortex; ; internal globus pallidus;
	Top expressed in
	primary motor cortex; ; cingulate gyrus; ; facial motor nucleus; ; cerebellar vermis; ; globus pallidus; ; medial dorsal nucleus; ; spermatocyte; ; prefrontal cortex; ; habenula; ; supraoptic nucleus;
	More reference expression data
	More reference expression data
Gene ontology
Molecular function	protein binding; calcium-activated potassium channel activity; potassium channel regulator activity;
Cellular component	integral component of membrane; integral component of plasma membrane; plasma membrane; voltage-gated potassium channel complex; membrane;
Biological process	ion transport; action potential; neuronal action potential; regulation of vasoconstriction; chemical synaptic transmission; detection of calcium ion; potassium ion transport; regulation of neurotransmitter secretion; potassium ion transmembrane transport;
	Sources:Amigo / QuickGO
Orthologs
	27345
	58802
	ENSG00000135643
	ENSMUSG00000054934
	Q86W47
	Q9JIN6
	NM_014505
	NM_021452
	NP_055320
	NP_067427
	Wikidata
View/Edit Human	View/Edit Mouse

Calcium-activated potassium channel subunit beta-4 is a protein that in humans is encoded by the KCNMB4 gene.

MaxiK channels are large conductance, voltage and calcium-sensitive potassium channels which are fundamental to the control of smooth muscle tone and neuronal excitability. MaxiK channels can be formed by 2 subunits: the pore-forming alpha subunit and the modulatory beta subunit. The protein encoded by this gene is an auxiliary beta subunit which slows activation kinetics, leads to steeper calcium sensitivity, and shifts the voltage range of current activation to more negative potentials than does the beta 1 subunit.

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