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Gene: Kcnma1 (potassium calcium-activated channel subfamily M alpha 1) Rattus norvegicus
Symbol: Kcnma1
Name: potassium calcium-activated channel subfamily M alpha 1
Description: Exhibits identical protein binding activity; large conductance calcium-activated potassium channel activity; and ligand-gated ion channel activity involved in regulation of presynaptic membrane potential. Involved in several processes, including negative regulation of small intestine smooth muscle contraction; positive regulation of neuron apoptotic process; and response to estrogen. Localizes to several cellular components, including external side of plasma membrane; glutamatergic synapse; and integral component of presynaptic active zone membrane. Colocalizes with mitochondrion. Human ortholog(s) of this gene implicated in Alzheimer's disease and idiopathic generalized epilepsy. Orthologous to human KCNMA1 (potassium calcium-activated channel subfamily M alpha 1); INTERACTS WITH (+)-pilocarpine; (+)-Pimaric acid; (R)-noradrenaline.
Type: protein-coding
Also known as: BK channel; BKCa; BKCA alpha; calcium-activated potassium channel alpha subunit; calcium-activated potassium channel subunit alpha-1; calcium-activated potassium channel, subfamily M subunit alpha-1; cbv1; k(VCA)alpha; KCa1.1; Kcnma; KCNMA1b; KCNMA1c; LOC498438; maxi K channel; maxiK; potassium channel, calcium activated large conductance subfamily M alpha, member 1; potassium large conductance calcium-activated channel, subfamily M, alpha member 1; similar to potassium large conductance calcium-activated channel, subfamily M, alpha member 1; Slo; slo homolog; slo-alpha; slo1; slowpoke homolog
Allele / Splice: Kcnma1_v1   Kcnma1_v2  
Latest Assembly: Rnor_6.0 - RGSC Genome Assembly v6.0
NCBI Annotation Information: Annotation category: partial on reference assembly
Rat AssemblyChrPosition (strand)SourceGenome Browsers
Rnor_6.015344,204 - 1,048,849 (+)NCBIRnor6.0Rnor_6.0rn6Rnor6.0
Rnor_6.0 Ensembl15344,360 - 1,047,956 (+)EnsemblRnor6.0rn6Rnor6.0
Rnor_5.015339,100 - 1,037,105 (+)NCBIRnor5.0Rnor_5.0rn5Rnor5.0
RGSC_v3.415575,136 - 950,275 (+)NCBIRGSC3.4rn4RGSC3.4
RGSC_v3.115322,288 - 950,273NCBI
Celera153,556,267 - 4,246,392 (-)NCBICelera
Cytogenetic Map15p16NCBI
JBrowse: View Region in Genome Browser (JBrowse)

Disease Annotations
Gene-Chemical Interaction Annotations
Gene Ontology Annotations
References - curated
References - uncurated


Comparative Map Data
Position Markers
QTLs in Region (Rnor_6.0)
miRNA Target Status


RNA-SEQ Expression


Nucleotide Sequences
Protein Sequences

Strain Variation

Strain Sequence Variants (Rnor 6.0)

Additional Information

External Database Links
Nomenclature History
RGD Curation Notes
More on Kcnma1
Alliance Gene
Ensembl Gene
JBrowse: rn5 rn6
NCBI Genome Data Viewer

RGD Object Information
RGD ID: 620715
Created: 2002-08-06
Species: Rattus norvegicus
Last Modified: 2020-05-05
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.