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    KCNMA1 potassium large conductance calcium-activated channel, subfamily M, alpha member 1 [ Homo sapiens ]

    Gene ID: 3778, updated on 13-May-2012

    Summary

    Official Symbol
    KCNMA1provided by HGNC
    Official Full Name
    potassium large conductance calcium-activated channel, subfamily M, alpha member 1provided by HGNC
    Primary source
    HGNC:6284
    Locus tag
    RP11-443A13.1
    See related
    Ensembl:ENSG00000156113; HPRD:15967; MIM:600150; Vega:OTTHUMG00000018543
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Homo sapiens
    Lineage
    Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
    Also known as
    SLO; BKTM; SLO1; MaxiK; SAKCA; mSLO1; KCa1.1; SLO-ALPHA; bA205K10.1; MGC71881; DKFZp686K1437
    Summary
    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, which is the product of this gene, and the modulatory beta subunit. Intracellular calcium regulates the physical association between the alpha and beta subunits. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

    Genomic context

    Location :
    10q22.3
    Sequence :
    Chromosome: 10; NC_000010.10 (78629359..79397577, complement)
    See KCNMA1 in Epigenomics, MapViewer

    Chromosome 10 - NC_000010.10Genomic Context describing neighboring genes Neighboring gene chromosome 10 open reading frame 11 Neighboring gene ATP synthase, H+ transporting, mitochondrial Fo complex, subunit C1 (subunit 9) pseudogene 8 Neighboring gene retinoblastoma binding protein 6 pseudogene Neighboring gene zinc finger protein 532 pseudogene

    Genomic regions, transcripts, and products

    Bibliography

    GeneRIFs: Gene References Into Functions What's a GeneRIF?

    HIV-1 protein interactions

    Protein Gene Interaction Pubs
    Envelope surface glycoprotein gp120 env HIV-1 gp120 from both CCR5- and CXCR4-tropic HIV-1 strains opens calcium-activated potassium (K(Ca)), chloride, and calcium-permeant nonselective cation channels in macrophages; these signals are mediated by CCR5 and CXCR4 PubMed

    Go to the HIV-1, Human Protein Interaction Database

    Interactions

    Products Interactant Other Gene Complex Source Pubs Description
    NP_002238.2 NP_066921.2 CACNA1H    BIND  PubMed alpha-1-3.2 T-type calcium channel associates with BKCa potassium channel. 
    NP_002238.2 NP_002125.3 HMOX2    BIND  PubMed KCNMA1 interacts with HO-2. 
    Q12791 O95180 CACNA1H    HPRD  PubMed  
    Q12791 P19440 GGT1    HPRD  PubMed  
    Q12791 P30519 HMOX2    HPRD  PubMed  
    Q12791 Q12791 KCNMA1    HPRD  PubMed  
    Q12791 Q16558 KCNMB1    HPRD  PubMed  
    Q12791 P78559 MAP1A    HPRD  PubMed  
    Q12791 Q05397 PTK2    HPRD  PubMed  

    General gene information

    Markers

    Homology

    Pathways from BioSystems

    • Ca2+ activated K+ channels, organism-specific biosystem (from REACTOME)
      Ca2+ activated K+ channels, organism-specific biosystemCa2+ activated potassium channels are expressed in neuronal and non-neuronal tissue such as smooth muscle, epithelial cell and sensory cells. Ca2+ activated potassium channels are activated when the ...
    • Hemostasis, organism-specific biosystem (from REACTOME)
      Hemostasis, organism-specific biosystemHemostasis is a physiological response that culminates in the arrest of bleeding from an injured vessel. Under normal conditions the vascular endothelium supports vasodilation, inhibits platelet adhe...
    • Neuronal System, organism-specific biosystem (from REACTOME)
      Neuronal System, organism-specific biosystemThe human brain contains at least 100 billion neurons, each with the ability to influence many other cells. Clearly, highly sophisticated and efficient mechanisms are needed to enable communication a...
    • Nitric oxide stimulates guanylate cyclase, organism-specific biosystem (from REACTOME)
      Nitric oxide stimulates guanylate cyclase, organism-specific biosystemNitric Oxide (NO) inhibits smooth muscle cell proliferation and migration, oxidation of low-density lipoproteins, and platelet aggregation and adhesion. It can stimulate vasodilatation of the endothe...
    • Pancreatic secretion, organism-specific biosystem (from KEGG)
      Pancreatic secretion, organism-specific biosystemThe pancreas performs both exocrine and endocrine functions. The exocrine pancreas consists of two parts, the acinar and duct cells. The primary functions of pancreatic acinar cells are to synthesiz...
    • Pancreatic secretion, conserved biosystem (from KEGG)
      Pancreatic secretion, conserved biosystemThe pancreas performs both exocrine and endocrine functions. The exocrine pancreas consists of two parts, the acinar and duct cells. The primary functions of pancreatic acinar cells are to synthesiz...
    • Platelet homeostasis, organism-specific biosystem (from REACTOME)
      Platelet homeostasis, organism-specific biosystemUnder normal conditions the vascular endothelium supports vasodilation, inhibits platelet adhesion and activation, suppresses coagulation, enhances fibrin cleavage and is anti-inflammatory in charact...
    • Potassium Channels, organism-specific biosystem (from REACTOME)
      Potassium Channels, organism-specific biosystemPotassium channels are tetrameric ion channels that are widely distributed and are found in all cell types. Potassium channels control resting membrane potential in neurons, contribute to regulation ...
    • Salivary secretion, organism-specific biosystem (from KEGG)
      Salivary secretion, organism-specific biosystemSaliva has manifold functions in maintaining the integrity of the oral tissues, in protecting teeth from caries, in the tasting and ingestion of food, in speech and in the tolerance of tenures, for e...
    • Salivary secretion, conserved biosystem (from KEGG)
      Salivary secretion, conserved biosystemSaliva has manifold functions in maintaining the integrity of the oral tissues, in protecting teeth from caries, in the tasting and ingestion of food, in speech and in the tolerance of tenures, for e...
    • Vascular smooth muscle contraction, organism-specific biosystem (from KEGG)
      Vascular smooth muscle contraction, organism-specific biosystemThe vascular smooth muscle cell (VSMC) is a highly specialized cell whose principal function is contraction. On contraction, VSMCs shorten, thereby decreasing the diameter of a blood vessel to regula...
    • Vascular smooth muscle contraction, conserved biosystem (from KEGG)
      Vascular smooth muscle contraction, conserved biosystemThe vascular smooth muscle cell (VSMC) is a highly specialized cell whose principal function is contraction. On contraction, VSMCs shorten, thereby decreasing the diameter of a blood vessel to regula...
    • cGMP effects, organism-specific biosystem (from REACTOME)
      cGMP effects, organism-specific biosystemCyclic guanosine monophosphate (cGMP) is an important secondary messenger synthesized by guanylate cyclases. cGMP has effects on phosphodiesterases (PDE), ion-gated channels, and the cGMP-dependent p...

    Gene Ontology Provided by GOA

    Function Evidence Code Pubs
    actin binding IDA
    Inferred from Direct Assay
    more info
    PubMed 
    calcium-activated potassium channel activity IDA
    Inferred from Direct Assay
    more info
    PubMed 
    large conductance calcium-activated potassium channel activity IDA
    Inferred from Direct Assay
    more info
    PubMed 
    large conductance calcium-activated potassium channel activity IMP
    Inferred from Mutant Phenotype
    more info
    PubMed 
    metal ion binding IEA
    Inferred from Electronic Annotation
    more info
     
    nucleotide binding IEA
    Inferred from Electronic Annotation
    more info
     
    potassium channel activity TAS
    Traceable Author Statement
    more info
     
    protein binding IPI
    Inferred from Physical Interaction
    more info
    PubMed 
    voltage-gated ion channel activity IEA
    Inferred from Electronic Annotation
    more info
     
    voltage-gated potassium channel activity IDA
    Inferred from Direct Assay
    more info
    PubMed 
    Process Evidence Code Pubs
    blood coagulation TAS
    Traceable Author Statement
    more info
     
    cellular potassium ion homeostasis IDA
    Inferred from Direct Assay
    more info
    PubMed 
    ion transport IEA
    Inferred from Electronic Annotation
    more info
     
    micturition IDA
    Inferred from Direct Assay
    more info
    PubMed 
    negative regulation of cell volume IDA
    Inferred from Direct Assay
    more info
    PubMed 
    positive regulation of apoptotic process IMP
    Inferred from Mutant Phenotype
    more info
    PubMed 
    potassium ion transmembrane transport IBA
    Inferred from Biological aspect of Ancestor
    more info
     
    potassium ion transmembrane transport TAS
    Traceable Author Statement
    more info
     
    potassium ion transport IDA
    Inferred from Direct Assay
    more info
    PubMed 
    regulation of membrane potential IDA
    Inferred from Direct Assay
    more info
    PubMed 
    response to calcium ion IDA
    Inferred from Direct Assay
    more info
    PubMed 
    response to carbon monoxide IDA
    Inferred from Direct Assay
    more info
    PubMed 
    response to carbon monoxide IMP
    Inferred from Mutant Phenotype
    more info
    PubMed 
    response to hypoxia IDA
    Inferred from Direct Assay
    more info
    PubMed 
    response to osmotic stress IDA
    Inferred from Direct Assay
    more info
    PubMed 
    smooth muscle contraction involved in micturition IDA
    Inferred from Direct Assay
    more info
    PubMed 
    synaptic transmission TAS
    Traceable Author Statement
    more info
     
    transmembrane transport IEA
    Inferred from Electronic Annotation
    more info
     
    Component Evidence Code Pubs
    apical plasma membrane IDA
    Inferred from Direct Assay
    more info
    PubMed 
    caveola IDA
    Inferred from Direct Assay
    more info
    PubMed 
    integral to membrane IDA
    Inferred from Direct Assay
    more info
    PubMed 
    plasma membrane TAS
    Traceable Author Statement
    more info
     
    voltage-gated potassium channel complex IDA
    Inferred from Direct Assay
    more info
    PubMed 

    General protein information

    Preferred Names
    calcium-activated potassium channel subunit alpha-1
    Names
    calcium-activated potassium channel subunit alpha-1
    hSlo
    k(VCA)alpha
    slo homolog
    slowpoke homolog
    BKCA alpha subunit
    maxi-K channel HSLO
    BK channel alpha subunit
    stretch-activated Kca channel
    calcium-activated potassium channel, subfamily M subunit alpha-1

    NCBI Reference Sequences (RefSeq)

    RefSeqs maintained independently of Annotated Genomes

    These reference sequences exist independently of genome builds. Explain

    These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

    Genomic

    1. NG_012270.1 RefSeqGene

      Range
      5001..773219
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_001014797.2NP_001014797.1  calcium-activated potassium channel subunit alpha-1 isoform a

      Status: REVIEWED

      Description
      Transcript Variant: This variant (1) represents the longer transcript, and encodes the longer isoform (a).
      Source sequence(s)
      AB209488, AC011439, BC024965, U09384
      UniProtKB/Swiss-Prot
      Q12791
      UniProtKB/TrEMBL
      Q59FH2
      Conserved Domains (4) summary
      pfam00520
      Location:216387
      Blast Score: 172
      Ion_trans; Ion transport protein
      pfam03493
      Location:536634
      Blast Score: 312
      BK_channel_a; Calcium-activated BK potassium channel alpha subunit
      cl11596
      Location:306384
      Blast Score: 159
      Ion_trans_2; Ion channel
      cl09931
      Location:410523
      Blast Score: 96
      NADB_Rossmann; Rossmann-fold NAD(P)(+)-binding proteins
    2. NM_001161352.1NP_001154824.1  calcium-activated potassium channel subunit alpha-1 isoform c

      Status: REVIEWED

      Description
      Transcript Variant: This variant (3) differs in the 3' UTR and has multiple coding region differences, compared to variant 1. The resulting isoform (c) contains a distinct C-terminus, compared to isoform a.
      Source sequence(s)
      AB113382, AC011439, BC024965, BQ574058, U11058
      UniProtKB/Swiss-Prot
      Q12791
      Related
      ENSP00000286628, OTTHUMP00000019912, ENST00000286628, OTTHUMT00000048885
      Conserved Domains (4) summary
      pfam00520
      Location:216387
      Blast Score: 173
      Ion_trans; Ion transport protein
      pfam03493
      Location:536634
      Blast Score: 312
      BK_channel_a; Calcium-activated BK potassium channel alpha subunit
      cl11596
      Location:306384
      Blast Score: 160
      Ion_trans_2; Ion channel
      cl09931
      Location:410523
      Blast Score: 96
      NADB_Rossmann; Rossmann-fold NAD(P)(+)-binding proteins
    3. NM_001161353.1NP_001154825.1  calcium-activated potassium channel subunit alpha-1 isoform d

      Status: REVIEWED

      Description
      Transcript Variant: This variant (4) differs in the 3' UTR and has multiple coding region differences, compared to variant 1. The resulting isoform (d) contains a distinct C-terminus, compared to isoform a.
      Source sequence(s)
      AB113575, AC011439, BC024965, BQ574058, U11058
      Consensus CDS
      CCDS53545.1
      UniProtKB/Swiss-Prot
      Q12791
      Related
      ENSP00000385806, ENST00000404857
      Conserved Domains (4) summary
      pfam00520
      Location:216387
      Blast Score: 172
      Ion_trans; Ion transport protein
      pfam03493
      Location:536634
      Blast Score: 312
      BK_channel_a; Calcium-activated BK potassium channel alpha subunit
      cl11596
      Location:306384
      Blast Score: 158
      Ion_trans_2; Ion channel
      cl09931
      Location:410523
      Blast Score: 96
      NADB_Rossmann; Rossmann-fold NAD(P)(+)-binding proteins
    4. NM_002247.3NP_002238.2  calcium-activated potassium channel subunit alpha-1 isoform b

      Status: REVIEWED

      Description
      Transcript Variant: This variant (2) differs in the 3' UTR and has multiple coding region differences, compared to variant 1. The resulting isoform (b) contains a distinct C-terminus, compared to isoform a.
      Source sequence(s)
      AC011439, BC024965, BC137115, BQ574058, U11058, U13913
      Consensus CDS
      CCDS7352.1
      UniProtKB/Swiss-Prot
      Q12791
      Related
      ENSP00000286627, OTTHUMP00000019904, ENST00000286627, OTTHUMT00000048877
      Conserved Domains (4) summary
      pfam00520
      Location:216387
      Blast Score: 171
      Ion_trans; Ion transport protein
      pfam03493
      Location:536634
      Blast Score: 312
      BK_channel_a; Calcium-activated BK potassium channel alpha subunit
      cl11596
      Location:306384
      Blast Score: 159
      Ion_trans_2; Ion channel
      cl09931
      Location:410523
      Blast Score: 95
      NADB_Rossmann; Rossmann-fold NAD(P)(+)-binding proteins

    RefSeqs of Annotated Genomes: Build 37.3

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh37.p5 Primary Assembly

    Genomic

    1. NC_000010.10 Reference GRCh37.p5 Primary Assembly

      Range
      78629359..79397577, complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Alternate HuRef

    Genomic

    1. AC_000142.1 Alternate HuRef

      Range
      72624294..73391824, complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    Related Sequences

    Nucleotide Protein
    Heading Accession and Version
    genomic AC011439.12 (70434..72524) None
    genomic AC021032.9 None
    genomic AC067745.7 (2000..156139) None
    genomic AL157833.14 CAI39728.1
      CAI39729.1
      CAI39730.1
      CAI39731.1
      CAI39732.1
      CAI39733.1
      CAI39734.1
      CAI39735.1
      CAI39736.1
      CAI39737.1
      CAI39738.1
    genomic AL157833.14 CAI39728.1
      CAI39729.1
      CAI39730.1
      CAI39731.1
      CAI39732.1
      CAI39733.1
      CAI39734.1
      CAI39735.1
      CAI39736.1
      CAI39737.1
      CAI39738.1
    genomic AL607069.8 (2000..3993) None
    genomic AL627447.12 CAI16162.1
      CAI16163.1
      CAI16164.1
      CAI16165.1
      CAI16166.1
      CAI16168.1
      CAI16169.1
      CAI16170.1
      CAI16171.1
      CAI16172.1
    genomic AL731556.11 CAI14072.1
      CAI14073.1
      CAI14074.1
      CAI14075.1
      CAI14076.1
      CAI14077.1
      CAI14078.1
      CAI14079.1
      CAI14081.1
      CAI14082.1
    genomic AL731560.4 CAI40868.1
      CAI40869.1
      CAI40870.1
      CAI40871.1
      CAI40872.1
      CAI40873.1
      CAI40874.1
      CAI40875.1
      CAI40877.1
      CAI40878.1
      CAI40879.1
      CAI40880.1
      CAI40881.1
    genomic AL731560.4 CAI40868.1
      CAI40869.1
      CAI40870.1
      CAI40871.1
      CAI40872.1
      CAI40873.1
      CAI40874.1
      CAI40875.1
      CAI40877.1
      CAI40878.1
      CAI40879.1
      CAI40880.1
      CAI40881.1
    genomic AL731575.3 (2000..96211) None
    genomic CH471083.1 EAW54597.1
      EAW54598.1
      EAW54599.1
      EAW54600.1
      EAW54601.1
      EAW54602.1
    mRNA AB113382.1 BAD06365.1
    mRNA AB113575.1 BAD06397.1
    mRNA AB209488.1 BAD92725.1
    mRNA AB524033.1 BAJ07308.1
    mRNA AF025999.1 AAB88802.1
    mRNA AF118141.1 AAD31173.1
    mRNA AF349445.1 AAK30158.1
    mRNA AK024857.1 None
    mRNA AK055362.1 None
    mRNA AK124355.1 None
    mRNA AK128392.1 None
    mRNA AK310379.1 None
    mRNA AY040849.1 AAK91504.1
    mRNA AY445624.1 AAS01054.1
    mRNA BC009695.1 None
    mRNA BC024965.1 None
    mRNA BC062659.1 AAH62659.1
    mRNA BC137115.1 AAI37116.1
    mRNA BC137137.1 AAI37138.1
    mRNA BC144496.1 AAI44497.1
    mRNA BQ574058.1 None
    mRNA BX648925.1 None
    mRNA U02632.1 AAA50173.1
    mRNA U09384.1 AAA50216.1
    mRNA U11058.2 AAB65837.1
    mRNA U11717.1 AAC50353.1
    mRNA U13913.1 AAA85104.1
    mRNA U23767.1 AAA92290.1
    Protein Accession Links
    GenPept Link UniProtKB Link
    Q12791.2 GenPept UniProtKB/Swiss-Prot:Q12791
    Q59FH2 GenPept UniProtKB/TrEMBL:Q59FH2
    Q5JQ19 GenPept UniProtKB/TrEMBL:Q5JQ19
    Q5JQ20 GenPept UniProtKB/TrEMBL:Q5JQ20
    Q5JQ21 GenPept UniProtKB/TrEMBL:Q5JQ21
    Q6JJ72 GenPept UniProtKB/TrEMBL:Q6JJ72
    Q9BX94 GenPept UniProtKB/TrEMBL:Q9BX94

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