| Identification |
|---|
| HMDB Protein ID
| CDBP01577 |
| Secondary Accession Numbers
| Not Available |
| Name
| Calcium-activated potassium channel subunit alpha-1 |
| Description
| Not Available |
| Synonyms
|
- BK channel
- BKCA alpha
- Calcium-activated potassium channel, subfamily M subunit alpha-1
- K(VCA)alpha
- KCa1.1
- Maxi K channel
- MaxiK
- Slo homolog
- Slo-alpha
- Slo1
- Slowpoke homolog
- hSlo
|
| Gene Name
| KCNMA1 |
| Protein Type
| Transporter |
| Biological Properties |
|---|
| General Function
| Involved in ion channel activity |
| Specific Function
| Potassium channel activated by both membrane depolarization or increase in cytosolic Ca(2+) that mediates export of K(+). It is also activated by the concentration of cytosolic Mg(2+). Its activation dampens the excitatory events that elevate the cytosolic Ca(2+) concentration and/or depolarize the cell membrane. It therefore contributes to repolarization of the membrane potential. Plays a key role in controlling excitability in a number of systems, such as regulation of the contraction of smooth muscle, the tuning of hair cells in the cochlea, regulation of transmitter release, and innate immunity. In smooth muscles, its activation by high level of Ca(2+), caused by ryanodine receptors in the sarcoplasmic reticulum, regulates the membrane potential. In cochlea cells, its number and kinetic properties partly determine the characteristic frequency of each hair cell and thereby helps to establish a tonotopic map. Kinetics of KCNMA1 channels are determined by alternative splicing, phosphorylation status and its combination with modulating beta subunits. Highly sensitive to both iberiotoxin (IbTx) and charybdotoxin (CTX) |
| GO Classification
|
| Component |
| membrane |
| cell part |
| ion channel complex |
| cation channel complex |
| potassium channel complex |
| voltage-gated potassium channel complex |
| macromolecular complex |
| protein complex |
| Function |
| ion transmembrane transporter activity |
| transporter activity |
| ion channel activity |
| cation channel activity |
| potassium channel activity |
| voltage-gated potassium channel activity |
| binding |
| catalytic activity |
| calcium activated cation channel activity |
| calcium-activated potassium channel activity |
| transmembrane transporter activity |
| substrate-specific transmembrane transporter activity |
| Process |
| metabolic process |
| establishment of localization |
| transport |
| transmembrane transport |
| monovalent inorganic cation transport |
| potassium ion transport |
| ion transport |
| cation transport |
|
| Cellular Location
|
- Membrane
- Multi-pass membrane protein
|
| Pathways
|
Not Available
|
| Gene Properties |
|---|
| Chromosome Location
| Chromosome:1 |
| Locus
| 10q22.3 |
| SNPs
| KCNMA1 |
| Gene Sequence
|
>3711 bp
ATGGCAAATGGTGGCGGCGGCGGCGGCGGCAGCAGCGGCGGCGGCGGCGGCGGCGGAGGC
AGCAGTCTTAGAATGAGTAGCAATATCCACGCGAACCATCTCAGCCTAGACGCGTCCTCC
TCCTCCTCCTCCTCCTCTTCCTCTTCTTCTTCTTCCTCCTCCTCTTCCTCCTCGTCCTCG
GTCCACGAGCCCAAGATGGATGCGCTCATCATCCCGGTGACCATGGAGGTGCCGTGCGAC
AGCCGGGGCCAACGCATGTGGTGGGCTTTCCTGGCCTCCTCCATGGTGACTTTCTTCGGG
GGCCTCTTCATCATCTTGCTCTGGCGGACGCTCAAGTACCTGTGGACCGTGTGCTGCCAC
TGCGGGGGCAAGACGAAGGAGGCCCAGAAGATTAACAATGGCTCAAGCCAGGCGGATGGC
ACTCTCAAACCAGTGGATGAAAAAGAGGAGGCAGTGGCCGCCGAGGTCGGCTGGATGACC
TCCGTGAAGGACTGGGCGGGGGTGATGATATCCGCCCAGACACTGACTGGCAGAGTCCTG
GTTGTCTTAGTCTTTGCTCTCAGCATCGGTGCACTTGTAATATACTTCATAGATTCATCA
AACCCAATAGAATCCTGCCAGAATTTCTACAAAGATTTCACATTACAGATCGACATGGCT
TTCAACGTGTTCTTCCTTCTCTACTTCGGCTTGCGGTTTATTGCAGCCAACGATAAATTG
TGGTTCTGGCTGGAAGTGAACTCTGTAGTGGATTTCTTCACGGTGCCCCCCGTGTTTGTG
TCTGTGTACTTAAACAGAAGTTGGCTTGGTTTGAGATTTTTAAGAGCTCTGAGACTGATA
CAGTTTTCAGAAATTTTGCAGTTTCTGAATATTCTTAAAACAAGTAATTCCATCAAGCTG
GTGAATCTGCTCTCCATATTTATCAGCACGTGGCTGACTGCAGCCGGGTTCATCCATTTG
GTGGAGAATTCAGGGGACCCATGGGAAAATTTCCAAAACAACCAGGCTCTCACCTACTGG
GAATGTGTCTATTTACTCATGGTCACAATGTCCACCGTTGGTTATGGGGATGTTTATGCA
AAAACCACACTTGGGCGCCTCTTCATGGTCTTCTTCATCCTCGGGGGACTGGCCATGTTT
GCCAGCTACGTCCCTGAAATCATAGAGTTAATAGGAAACCGCAAGAAATACGGGGGCTCC
TATAGTGCGGTTAGTGGAAGAAAGCACATTGTGGTCTGCGGACACATCACTCTGGAGAGT
GTTTCCAACTTCCTGAAGGACTTTCTGCACAAGGACCGGGATGACGTCAATGTGGAGATC
GTTTTTCTTCACAACATCTCCCCCAACCTGGAGCTTGAAGCTCTGTTCAAACGACATTTT
ACTCAGGTGGAATTTTATCAGGGTTCCGTCCTCAATCCACATGATCTTGCAAGAGTCAAG
ATAGAGTCAGCAGATGCATGCCTGATCCTTGCCAACAAGTACTGCGCTGACCCGGATGCG
GAGGATGCCTCGAATATCATGAGAGTAATCTCCATAAAGAACTACCATCCGAAGATAAGA
ATCATCACTCAAATGCTGCAGTATCACAACAAGGCCCATCTGCTAAACATCCCGAGCTGG
AATTGGAAAGAAGGTGATGACGCAATCTGCCTCGCAGAGTTGAAGTTGGGCTTCATAGCC
CAGAGCTGCCTGGCTCAAGGCCTCTCCACCATGCTTGCCAACCTCTTCTCCATGAGGTCA
TTCATAAAGATTGAGGAAGACACATGGCAGAAATACTACTTGGAAGGAGTCTCAAATGAA
ATGTACACAGAATATCTCTCCAGTGCCTTCGTGGGTCTGTCCTTCCCTACTGTTTGTGAG
CTGTGTTTTGTGAAGCTCAAGCTCCTAATGATAGCCATTGAGTACAAGTCTGCCAACCGA
GAGAGCCGTATATTAATTAATCCTGGAAACCATCTTAAGATCCAAGAAGGTACTTTAGGA
TTTTTCATCGCAAGTGATGCCAAAGAAGTTAAAAGGGCATTTTTTTACTGCAAGGCCTGT
CATGATGACATCACAGATCCCAAAAGAATAAAAAAATGTGGCTGCAAACGGCCCAAGATG
TCCATCTACAAGAGAATGAGACGGGCATGTTGTTTTGATTGCGGACGTTCTGAGCGTGAC
TGCTCATGCATGTCAGGCCGTGTGCGTGGTAACGTGGACACCCTTGAGAGAGCCTTCCCA
CTTTCTTCTGTCTCTGTTAATGATTGCTCCACCAGTTTCCGTGCCTTTGAAGATGAGCAG
CCGTCAACACTATCACCAAAAAAAAAGCAACGGAATGGAGGCATGCGGAACTCACCCAAC
ACCTCGCCTAAGCTGATGAGGCATGACCCCTTGTTAATTCCTGGCAATGATCAGATTGAC
AACATGGACTCCAATGTGAAGAAGTACGACTCTACTGGGATGTTTCACTGGTGTGCACCC
AAGGAGATAGAGAAAGTCATCCTGACTCGAAGTGAAGCTGCCATGACCGTCCTGAGTGGC
CATGTCGTGGTCTGCATCTTTGGCGACGTCAGCTCAGCCCTGATCGGCCTCCGGAACCTG
GTGATGCCGCTCCGTGCCAGCAACTTTCATTACCATGAGCTCAAGCACATTGTGTTTGTG
GGCTCTATTGAGTACCTCAAGCGGGAATGGGAGACGCTTCATAACTTCCCCAAAGTGTCC
ATATTGCCTGGTACGCCATTAAGTCGGGCTGATTTAAGGGCTGTCAACATCAACCTCTGT
GACATGTGCGTTATCCTGTCAGCCAATCAGAATAATATTGATGATACTTCGCTGCAGGAC
AAGGAATGCATCTTGGCGTCACTCAACATCAAATCTATGCAGTTTGATGACAGCATCGGA
GTCTTGCAGGCTAATTCCCAAGGGTTCACACCTCCAGGAATGGATAGATCCTCTCCAGAT
AACAGCCCAGTGCACGGGATGTTACGTCAACCATCCATCACAACTGGGGTCAACATCCCC
ATCATCACTGAACTAGTGAACGATACTAATGTTCAGTTTTTGGACCAAGACGATGATGAT
GACCCTGATACAGAACTGTACCTCACGCAGCCCTTTGCCTGTGGGACAGCATTTGCCGTC
AGTGTCCTGGACTCACTCATGAGCGCGACGTACTTCAATGACAATATCCTCACCCTGATA
CGGACCCTGGTGACCGGAGGAGCCACGCCGGAGCTGGAGGCTCTGATTGCTGAGGAAAAC
GCCCTTAGAGGTGGCTACAGCACCCCGCAGACACTGGCCAATAGGGACCGCTGCCGCGTG
GCCCAGTTAGCTCTGCTCGATGGGCCATTTGCGGACTTAGGGGATGGTGGTTGTTATGGT
GATCTGTTCTGCAAAGCTCTGAAAACATATAATATGCTTTGTTTTGGAATTTACCGGCTG
AGAGATGCTCACCTCAGCACCCCCAGTCAGTGCACAAAGAGGTATGTCATCACCAACCCG
CCCTATGAGTTTGAGCTCGTGCCGACGGACCTGATCTTCTGCTTAATGCAGTTTGACCAC
AATGCCGGCCAGTCCCGGGCCAGCCTGTCCCATTCCTCCCACTCGTCGCAGTCCTCCAGC
AAGAAGAGCTCCTCTGTTCACTCCATCCCATCCACAGCAAACCGACAGAACCGGCCCAAG
TCCAGGGAGTCCCGGGACAAACAGAAGTACGTGCAGGAAGAGCGGCTTTGA
|
| Protein Properties |
|---|
| Number of Residues
| 1236 |
| Molecular Weight
| 137558.1 |
| Theoretical pI
| 7.07 |
| Pfam Domain Function
|
|
| Signals
|
|
|
Transmembrane Regions
|
- ["87-107", "179-199", "215-235", "240-260", "265-285", "301-321", "368-388"]
|
| Protein Sequence
|
>Calcium-activated potassium channel subunit alpha-1
MANGGGGGGGSSGGGGGGGGSSLRMSSNIHANHLSLDASSSSSSSSSSSSSSSSSSSSSS
VHEPKMDALIIPVTMEVPCDSRGQRMWWAFLASSMVTFFGGLFIILLWRTLKYLWTVCCH
CGGKTKEAQKINNGSSQADGTLKPVDEKEEAVAAEVGWMTSVKDWAGVMISAQTLTGRVL
VVLVFALSIGALVIYFIDSSNPIESCQNFYKDFTLQIDMAFNVFFLLYFGLRFIAANDKL
WFWLEVNSVVDFFTVPPVFVSVYLNRSWLGLRFLRALRLIQFSEILQFLNILKTSNSIKL
VNLLSIFISTWLTAAGFIHLVENSGDPWENFQNNQALTYWECVYLLMVTMSTVGYGDVYA
KTTLGRLFMVFFILGGLAMFASYVPEIIELIGNRKKYGGSYSAVSGRKHIVVCGHITLES
VSNFLKDFLHKDRDDVNVEIVFLHNISPNLELEALFKRHFTQVEFYQGSVLNPHDLARVK
IESADACLILANKYCADPDAEDASNIMRVISIKNYHPKIRIITQMLQYHNKAHLLNIPSW
NWKEGDDAICLAELKLGFIAQSCLAQGLSTMLANLFSMRSFIKIEEDTWQKYYLEGVSNE
MYTEYLSSAFVGLSFPTVCELCFVKLKLLMIAIEYKSANRESRILINPGNHLKIQEGTLG
FFIASDAKEVKRAFFYCKACHDDITDPKRIKKCGCKRPKMSIYKRMRRACCFDCGRSERD
CSCMSGRVRGNVDTLERAFPLSSVSVNDCSTSFRAFEDEQPSTLSPKKKQRNGGMRNSPN
TSPKLMRHDPLLIPGNDQIDNMDSNVKKYDSTGMFHWCAPKEIEKVILTRSEAAMTVLSG
HVVVCIFGDVSSALIGLRNLVMPLRASNFHYHELKHIVFVGSIEYLKREWETLHNFPKVS
ILPGTPLSRADLRAVNINLCDMCVILSANQNNIDDTSLQDKECILASLNIKSMQFDDSIG
VLQANSQGFTPPGMDRSSPDNSPVHGMLRQPSITTGVNIPIITELVNDTNVQFLDQDDDD
DPDTELYLTQPFACGTAFAVSVLDSLMSATYFNDNILTLIRTLVTGGATPELEALIAEEN
ALRGGYSTPQTLANRDRCRVAQLALLDGPFADLGDGGCYGDLFCKALKTYNMLCFGIYRL
RDAHLSTPSQCTKRYVITNPPYEFELVPTDLIFCLMQFDHNAGQSRASLSHSSHSSQSSS
KKSSSVHSIPSTANRQNRPKSRESRDKQKYVQEERL
|
| External Links |
|---|
| GenBank ID Protein
| 238624130 |
| UniProtKB/Swiss-Prot ID
| Q12791 |
| UniProtKB/Swiss-Prot Entry Name
| KCMA1_HUMAN |
| PDB IDs
|
Not Available |
| GenBank Gene ID
| NM_001161352.1 |
| GeneCard ID
| KCNMA1 |
| GenAtlas ID
| KCNMA1 |
| HGNC ID
| HGNC:6284 |
| References |
|---|
| General References
| Not Available |