| Identification |
|---|
| HMDB Protein ID
| CDBP01933 |
| Secondary Accession Numbers
| Not Available |
| Name
| Inward rectifier potassium channel 2 |
| Description
| Not Available |
| Synonyms
|
- Cardiac inward rectifier potassium channel
- IRK-1
- Inward rectifier K(+) channel Kir2.1
- Potassium channel, inwardly rectifying subfamily J member 2
- hIRK1
|
| Gene Name
| KCNJ2 |
| Protein Type
| Transporter |
| Biological Properties |
|---|
| General Function
| Involved in inward rectifier potassium channel activity |
| Specific Function
| Probably participates in establishing action potential waveform and excitability of neuronal and muscle tissues. Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. Can be blocked by extracellular barium or cesium |
| GO Classification
|
| Component |
| membrane |
| cell part |
| Function |
| transmembrane transporter activity |
| substrate-specific transmembrane transporter activity |
| ion transmembrane transporter activity |
| transporter activity |
| ion channel activity |
| inward rectifier potassium channel activity |
| cation channel activity |
| potassium channel activity |
| voltage-gated potassium channel activity |
| Process |
| potassium ion transport |
| ion transport |
| cation transport |
| establishment of localization |
| transport |
| monovalent inorganic cation transport |
|
| Cellular Location
|
- Membrane
- Multi-pass membrane protein
|
| Pathways
|
| Name | SMPDB/Pathwhiz | KEGG | | Muscle/Heart Contraction |    | Not Available | | Acebutolol Action Pathway |    | Not Available | | Alprenolol Action Pathway |    | Not Available | | Atenolol Action Pathway |    | Not Available | | Betaxolol Action Pathway |    | Not Available |
|
| Gene Properties |
|---|
| Chromosome Location
| Chromosome:1 |
| Locus
| 17q24.3 |
| SNPs
| KCNJ2 |
| Gene Sequence
|
>1284 bp
ATGGGCAGTGTGCGAACCAACCGCTACAGCATCGTTTCTTCAGAAGAAGACGGTATGAAG
TTGGCCACCATGGCAGTTGCAAATGGCTTTGGGAACGGGAAGAGTAAAGTCCACACCCGA
CAACAGTGCAGGAGCCGCTTTGTGAAGAAAGATGGCCACTGTAATGTTCAGTTCATCAAT
GTGGGTGAGAAGGGGCAACGGTACCTCGCAGACATCTTCACCACGTGTGTGGACATTCGC
TGGCGGTGGATGCTGGTTATTTTCTGCCTGGCTTTCGTCCTGTCATGGCTGTTTTTTGGC
TGTGTGTTTTGGTTGATAGCTCTGCTCCATGGGGACCTGGATGCATCCAAAGAGGGCAAA
GCTTGTGTGTCCGAGGTCAACAGCTTCACGGCTGCCTTCCTCTTCTCCATTGAGACCCAG
ACAACCATAGGCTATGGTTTCAGATGTGTCACGGATGAATGCCCAATTGCTGTTTTCATG
GTGGTGTTCCAGTCAATCGTGGGCTGCATCATCGATGCTTTCATCATTGGCGCAGTCATG
GCCAAGATGGCAAAGCCAAAGAAGAGAAACGAGACTCTTGTCTTCAGTCACAATGCCGTG
ATTGCCATGAGAGACGGCAAGCTGTGTTTGATGTGGCGAGTGGGCAATCTTCGGAAAAGC
CACTTGGTGGAAGCTCATGTTCGAGCACAGCTCCTCAAATCCAGAATTACTTCTGAAGGG
GAGTATATCCCTCTGGATCAAATAGACATCAATGTTGGGTTTGACAGTGGAATCGATCGT
ATATTTCTGGTGTCCCCAATCACTATAGTCCATGAAATAGATGAAGACAGTCCTTTATAT
GATTTGAGTAAACAGGACATTGACAACGCAGACTTTGAAATCGTGGTCATACTGGAAGGC
ATGGTGGAAGCCACTGCCATGACGACACAGTGCCGTAGCTCTTATCTAGCAAATGAAATC
CTGTGGGGCCACCGCTATGAGCCTGTGCTCTTTGAAGAGAAGCACTACTACAAAGTGGAC
TATTCCAGGTTCCACAAAACTTACGAAGTCCCCAACACTCCCCTTTGTAGTGCCAGAGAC
TTAGCAGAAAAGAAATATATCCTCTCAAATGCAAATTCATTTTGCTATGAAAATGAAGTT
GCCCTCACAAGCAAAGAGGAAGACGACAGTGAAAATGGAGTTCCAGAAAGCACTAGTACG
GACACGCCCCCTGACATAGACCTTCACAACCAGGCAAGTGTACCTCTAGAGCCCAGGCCC
TTACGGCGAGAGTCGGAGATATGA
|
| Protein Properties |
|---|
| Number of Residues
| 427 |
| Molecular Weight
| 48287.8 |
| Theoretical pI
| 5.47 |
| Pfam Domain Function
|
|
| Signals
|
|
|
Transmembrane Regions
|
|
| Protein Sequence
|
>Inward rectifier potassium channel 2
MGSVRTNRYSIVSSEEDGMKLATMAVANGFGNGKSKVHTRQQCRSRFVKKDGHCNVQFIN
VGEKGQRYLADIFTTCVDIRWRWMLVIFCLAFVLSWLFFGCVFWLIALLHGDLDASKEGK
ACVSEVNSFTAAFLFSIETQTTIGYGFRCVTDECPIAVFMVVFQSIVGCIIDAFIIGAVM
AKMAKPKKRNETLVFSHNAVIAMRDGKLCLMWRVGNLRKSHLVEAHVRAQLLKSRITSEG
EYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEG
MVEATAMTTQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARD
LAEKKYILSNANSFCYENEVALTSKEEDDSENGVPESTSTDTPPDIDLHNQASVPLEPRP
LRRESEI
|
| External Links |
|---|
| GenBank ID Protein
| Not Available |
| UniProtKB/Swiss-Prot ID
| P63252 |
| UniProtKB/Swiss-Prot Entry Name
| IRK2_HUMAN |
| PDB IDs
|
|
| GenBank Gene ID
| U24055 |
| GeneCard ID
| KCNJ2 |
| GenAtlas ID
| KCNJ2 |
| HGNC ID
| HGNC:6263 |
| References |
|---|
| General References
| Not Available |