KCNK4 (potassium two pore domain channel subfamily K member 4)

Gene

• Entrez ID: 50801
• Gene name: Potassium two pore domain channel subfamily K member 4
• Gene symbol: KCNK4
• Synonyms: FHEIG, K2p4.1, TRAAK, TRAAK1
• Chromosome: 11
• Chromosome location: 11q13.1
• Summary: This gene encodes a member of the TWIK-related arachidonic acid-stimulated two pore potassium channel subfamily. The encoded protein homodimerizes and functions as an outwardly rectifying channel. This channel is regulated by polyunsaturated fatty acids,

miRNA

miRTarBase ID	miRNA	Experiments	Reference
MIRT017249	hsa-miR-335-5p	Microarray	18185580
MIRT1081852	hsa-miR-1304	CLIP-seq
MIRT1081853	hsa-miR-1827	CLIP-seq

Gene ontology (GO)

GO ID	Ontology	Definition	Evidence	Reference
GO:0005244	Function	Voltage-gated ion channel activity	IEA
GO:0005267	Function	Potassium channel activity	IDA	22282805
GO:0005886	Component	Plasma membrane	TAS
GO:0005887	Component	Integral component of plasma membrane	IBA	21873635
GO:0005887	Component	Integral component of plasma membrane	IMP	22282805
GO:0005887	Component	Integral component of plasma membrane	ISS
GO:0006813	Process	Potassium ion transport	TAS	10767409
GO:0007613	Process	Memory	IEA
GO:0019233	Process	Sensory perception of pain	ISS
GO:0022841	Function	Potassium ion leak channel activity	IBA	21873635
GO:0030322	Process	Stabilization of membrane potential	IBA	21873635
GO:0034705	Component	Potassium channel complex	IDA	22282805
GO:0034765	Process	Regulation of ion transmembrane transport	IEA
GO:0050951	Process	Sensory perception of temperature stimulus	ISS
GO:0050976	Process	Detection of mechanical stimulus involved in sensory perception of touch	ISS
GO:0071260	Process	Cellular response to mechanical stimulus	IDA	22282805
GO:0071398	Process	Cellular response to fatty acid	IDA	22282805
GO:0071469	Process	Cellular response to alkaline pH	ISS
GO:0071502	Process	Cellular response to temperature stimulus	ISS
GO:0071805	Process	Potassium ion transmembrane transport	IBA	21873635
GO:0071805	Process	Potassium ion transmembrane transport	IDA	22282805
GO:0097604	Function	Temperature-gated cation channel activity	ISS
GO:0098782	Function	Mechanosensitived potassium channel activity	IDA	22282805

Other IDs

• MIM: 605720
• HGNC: 6279
• e!Ensembl: ENSG00000182450

Protein

• UniProt ID: Q9NYG8
• Protein name: Potassium channel subfamily K member 4 (TWIK-related arachidonic acid-stimulated potassium channel protein) (TRAAK) (Two pore potassium channel KT4.1) (K2P4.1) (Two pore K(+) channel KT4.1)
• Protein function: K(+) channel that conducts voltage-dependent outward rectifying currents upon membrane depolarization. Voltage sensing is coupled to K(+) electrochemical gradient in an 'ion flux gating' mode where outward but not inward ion flow opens the gate.
• PDB: 3UM7, 4I9W, 4RUE, 4RUF, 4WFE, 4WFF, 4WFG, 4WFH, 7LJ4, 7LJ5, 7LJA, 7LJB
• Family and domains:

  Pfam

  Accession	ID	Position in sequence	Description	Type
  PF07885	Ion_trans_2	65 → 144	Ion channel	Family
  PF07885	Ion_trans_2	165 → 259	Ion channel	Family

• Sequence:

  MRSTTLLALLALVLLYLVSGALVFRALEQPHEQQAQRELGEVREKFLRAHPCVSDQELGL
  LIKEVADALGGGADPETNSTSNSSHSAWDLGSAFFFSGTIITTIGYGNVALRTDAGRLFC
  IFYALVGIPLFGILLAGVGDRLGSSLRHGIGHIEAIFLKWHVPPELVRVLSAMLFLLIGC
  LLFVLTPTFVFCYMEDWSKLEAIYFVIVTLTTVGFGDYVAGADPRQDSPAYQPLVWFWIL
  LGLAYFASVLTTIGNWLRVVSRRTRAEMGGLTAQAASWTGTVTARVTQRAGPAAPPPEKE
  QPLLPPPPCPAQPLGRPRSPSPPEKAQPPSPPTASALDYPSENLAFIDESSDTQSERGCP
  LPRAPRGRRRPNPPRKPVRPRGPGRPRDKGVPV

• Sequence length: 393

Pathways

Reactome:

TWIK related potassium channel (TREK)
Phase 4 - resting membrane potential

Associated diseases

Causal
Disease name	Disease term	dbSNP ID	References
Brachydactyly	Brachydactyly	rs121908949, rs28937580, rs121909082, rs104894122, rs863223289, rs863223290, rs104894121, rs1587657302, rs863223292, rs74315386, rs74315387, rs28936397, rs753691079, rs121909348, rs121917852, rs121917853, rs121917854, rs121917855, rs121917859, rs121917861, rs267606873, rs267606872, rs267606985, rs267606986, rs267606987, rs267606988, rs28933082, rs397514519, rs869025613, rs869025614, rs886039878, rs1553540620, rs1057518333, rs1948841937, rs1948868228, rs1948842030, rs1948842142
Mental retardation	Intellectual Disability	rs5742905, rs267607136, rs267607137, rs2131714307, rs267607038, rs267607042, rs80338685, rs137853127, rs80338815, rs28940893, rs387906309, rs121908096, rs121908099, rs587784365, rs121918315, rs121918316, rs397515320, rs121434489, rs1585215916, rs267607233, rs267606752, rs137852214, rs606231193, rs132630297, rs80338758, rs137852815, rs122455132, rs28935171, rs122453113, rs122445108, rs28934904, rs28934908, rs28935468, rs61748421, rs121918624, rs202060209, rs80338708, rs113994198, rs199422192, rs387906635, rs1554770064, rs1057519611, rs1060499526, rs387906636, rs1057519612, rs281875189, rs281875322, rs387906799, rs387906804, rs875989800, rs797045262, rs387906845, rs387906846, rs876657378, rs281875227, rs281875228, rs281875229, rs281875230, rs387906861, rs370667926, rs387906932, rs387906943, rs1557612719, rs387907190, rs387907191, rs2126499522, rs587776908, rs1560982564, rs80359505, rs398123009, rs587776929, rs587776930, rs397514555, rs398122824, rs398122825, rs397514556, rs2147483647, rs587776937, rs397514627, rs397514655, rs397514656, rs730882192, rs1587520018, rs1581995953, rs1554121970, rs1581987445, rs397514670, rs376395543, rs137854128, rs397509411, rs397509412, rs397514741, rs398122394, rs879255516, rs397518483, rs398122406, rs398122412, rs398123561, rs200667343, rs587777162, rs587777202, rs62507350, rs587777219, rs587777225, rs587777226, rs587779750, rs587777326, rs587777334, rs281875332, rs587780470, rs587780474, rs587780486, rs587777378, rs587777406, rs587777408, rs587777409, rs587777411, rs587777522, rs527236034, rs527236035, rs267608571, rs267608382, rs267608597, rs61753979, rs61751444, rs267608493, rs587777644, rs587777645, rs587777646, rs587777703, rs587779388, rs606231266, rs606231267, rs672601340, rs606231268, rs672601341, rs606231269, rs672601342, rs606231270, rs606231271, rs606231272, rs606231273, rs587784566, rs587784092, rs587783749, rs587783747, rs587783640, rs587783483, rs606231456, rs606231457, rs606231458, rs606231459, rs672601370, rs672601369, rs672601371, rs672601367, rs672601366, rs672601365, rs672601364, rs672601363, rs672601362, rs672601376, rs672601377, rs672601378, rs724159949, rs724159950, rs724159948, rs724159956, rs724159953, rs727502860, rs727502861, rs730882197, rs749995448, rs786205143, rs794726770, rs1135401808, rs786205583, rs786205595, rs786205859, rs794727792, rs794727928, rs794729221, rs797044519, rs797044523, rs797044521, rs797044524, rs797044526, rs797044522, rs797044520, rs794727642, rs796052719, rs781746113, rs796052510, rs796052733, rs796052724, rs796052728, rs796052676, rs796053353, rs796053366, rs796053368, rs1555103986, rs1555110818, rs796052571, rs1555110843, rs796052626, rs796052618, rs796053290, rs796052217, rs672601368, rs797045164, rs797044961, rs797044962, rs200070245, rs797044963, rs869320675, rs869320676, rs797045012, rs752746786, rs797044885, rs797044925, rs797044854, rs797044849, rs797044930, rs797044901, rs797044918, rs797044884, rs797045177, rs797045178, rs797045050, rs797045036, rs797045053, rs797045047, rs797045037, rs797045042, rs797045041, rs879255261, rs782397980, rs797045263, rs797045264, rs797045655, rs797045586, rs545185248, rs797046031, rs797046028, rs797046029, rs797046030, rs797045249, rs797045529, rs797045952, rs797045984, rs797045540, rs797045539, rs797045989, rs863224930, rs869025202, rs863225264, rs863225077, rs876661308, rs869025222, rs864309560, rs758252808, rs745756308, rs869025286, rs869025287, rs869025578, rs143038880, rs869025579, rs869025580, rs869025581, rs869312704, rs869312674, rs869312677, rs869312689, rs869312693, rs869312698, rs869312708, rs869312711, rs869312826, rs869312825, rs869312824, rs869312823, rs758432471, rs869312821, rs761993070, rs869312844, rs869312842, rs869312843, rs869312841, rs869312847, rs869320632, rs869312955, rs773432002, rs869320713, rs869320772, rs869320773, rs879255270, rs875989848, rs875989849, rs1716457622, rs2108414289, rs878854401, rs875989786, rs1085307109, rs1085307108, rs876657679, rs876661167, rs876661076, rs876661055, rs876661219, rs876661064, rs876661151, rs876661041, rs200440467, rs876661295, rs878853045, rs878853143, rs878853142, rs878853149, rs1555910048, rs878853152, rs878853146, rs878853145, rs878853141, rs878853151, rs878853144, rs878853148, rs878853147, rs878853251, rs878853269, rs879253762, rs886037841, rs879253888, rs879253931, rs879254016, rs879255618, rs879255619, rs879255620, rs886037847, rs879255621, rs886039332, rs746177928, rs886039520, rs886041003, rs886041058, rs750035706, rs886041059, rs886041060, rs886041061, rs886041090, rs886041088, rs886041089, rs886041095, rs886041097, rs886041989, rs886041944, rs886041692, rs886041593, rs886041687, rs886041207, rs886041309, rs886041239, rs886041448, rs138336847, rs149644940, rs886041295, rs886041521, rs886041125, rs886042041, rs886041238, rs886041469, rs886041197, rs886041291, rs886041658, rs886041705, rs886041876, rs139716296, rs1057516030, rs1057517408, rs749655461, rs141179774, rs370916968, rs1057517676, rs1057517933, rs1057517708, rs1057518352, rs1057518183, rs1057518474, rs1057518204, rs1057517825, rs1057518796, rs1057518961, rs1057518772, rs1057518988, rs1057519004, rs1057518700, rs772450541, rs371310428, rs1057519019, rs1057519491, rs1057519546, rs1057519560, rs1057519565, rs1057519400, rs1057519402, rs1057519405, rs1057519593, rs1057519594, rs1057519628, rs1556912828, rs1060505029, rs1060505030, rs147001633, rs1057519947, rs1057519617, rs1057524832, rs774592932, rs797045045, rs1039571136, rs1555910821, rs1060499626, rs1060499655, rs1554770185, rs1060499936, rs1060501153, rs1060501151, rs1064792984, rs1060503378, rs1060503386, rs1060503383, rs1060500046, rs1064792999, rs1060505033, rs1064796564, rs1064797002, rs1064793161, rs150802299, rs1064796830, rs1064794996, rs1064795444, rs1064796034, rs1064796403, rs1064794979, rs1064796765, rs1064793539, rs760933323, rs1064793546, rs1064796406, rs1064796367, rs780441716, rs1064794894, rs1064796023, rs1064797355, rs1085307484, rs1064794935, rs1085307547, rs1131690804, rs757511770, rs1131691875, rs1131691979, rs398122823, rs1131691866, rs1131692159, rs1131692228, rs1131692154, rs113331868, rs1554121872, rs1554121875, rs926027867, rs1554122123, rs1554122129, rs1287121256, rs1554122526, rs1554123982, rs1554385102, rs1554385111, rs1554385305, rs1554386687, rs1554389088, rs1554402092, rs1554434435, rs1135401778, rs1135401760, rs1135401770, rs1135401771, rs1135401768, rs1135401779, rs1135401805, rs1135401797, rs1135401799, rs1135401816, rs1135401823, rs1135401824, rs1555769968, rs1135401825, rs1135401955, rs1135401956, rs1135401957, rs1135401958, rs1554129040, rs1554150543, rs1553188463, rs1553146165, rs1485978447, rs1361547443, rs750079325, rs369692236, rs1554231836, rs749188610, rs1554122735, rs1554689877, rs1174482090, rs781053477, rs1554623112, rs1555409836, rs1555411305, rs770014321, rs1555984461, rs1555990958, rs762292772, rs1554944271, rs1057524157, rs1485749468, rs1555984343, rs1293450628, rs373584239, rs1553722309, rs1553738686, rs1376334317, rs1553722294, rs1553283831, rs1554120589, rs1555985554, rs1555877287, rs1555411378, rs750922282, rs1553264873, rs1554263326, rs1554264268, rs1554263626, rs1554263625, rs766614772, rs1553620494, rs1555050158, rs1555050165, rs1555050171, rs1555050174, rs765556214, rs1402086660, rs1554645052, rs1555661648, rs1293246328, rs749494995, rs775592405, rs1553265189, rs1553242856, rs1553247374, rs1553241570, rs1553997065, rs1553998565, rs1380822792, rs1555028154, rs1555023232, rs1553194155, rs1553130904, rs1553152590, rs1553567864, rs1553638614, rs120074160, rs1554486894, rs1554767754, rs1554843977, rs1555443581, rs1555443600, rs1555439545, rs1555525088, rs770680174, rs1555889130, rs373178770, rs1555985532, rs1553519853, rs781325598, rs1410587479, rs1553638086, rs150259543, rs1554093891, rs1554121228, rs1554120498, rs1554121189, rs1212517874, rs1554770628, rs1555979158, rs1554770054, rs771610568, rs1451230055, rs1554770624, rs1555906707, rs1555906768, rs1555906781, rs1555907620, rs1555907623, rs1555907626, rs1555907653, rs1555907864, rs1554094145, rs1554202698, rs1554200722, rs773327091, rs1555607621, rs1555604778, rs1555607159, rs1555607682, rs1553364018, rs1553324416, rs1555411394, rs1554102556, rs1554122363, rs1555705966, rs1555103971, rs1555408401, rs1554461593, rs1554304254, rs1554120978, rs1047509819, rs1555982601, rs767774867, rs1554789246, rs1555111511, rs1555950676, rs1555954380, rs1555985649, rs1553194162, rs1553518509, rs1274633498, rs1554274371, rs1554122252, rs1554122458, rs1554122729, rs1554297905, rs1554776342, rs1554770046, rs1554770667, rs1554792556, rs1452715535, rs1555444885, rs1555534147, rs1427624649, rs1555611722, rs1555744282, rs1555706391, rs1178702025, rs1555984102, rs1554770589, rs1554121443, rs1559791842, rs1559824939, rs1555889127, rs1236702036, rs1553510280, rs1553511175, rs1553511226, rs1554150552, rs1554275163, rs1554201137, rs1553517991, rs1553518511, rs1553517984, rs1553518752, rs1554119814, rs1554122293, rs1554122341, rs1554122689, rs1554770243, rs1554770444, rs1557045250, rs959316981, rs1556270312, rs1553270640, rs978179634, rs1554093884, rs1491240980, rs1555943484, rs1554121453, rs1334099693, rs1554048616, rs1555660806, rs1555644480, rs1555651572, rs1567844992, rs1567855081, rs1567855669, rs1567855704, rs1567856045, rs1567856331, rs1567860075, rs1567860112, rs1567860640, rs1567860891, rs754919272, rs1567860919, rs1567861468, rs1567861489, rs1567861501, rs1567861894, rs1567863732, rs1567864750, rs1567877108, rs1567878511, rs758785463, rs1553808301, rs1553245038, rs1553789166, rs1553813646, rs1553631860, rs1554121265, rs1554770262, rs1555034768, rs1555984433, rs779009256, rs1553994814, rs1553996086, rs1553996072, rs1553270599, rs1553153291, rs760262127, rs1554119274, rs1554121878, rs1554387293, rs1554385203, rs757077698, rs750612085, rs1554776500, rs1564360978, rs1554776933, rs1554776938, rs1565278132, rs1567368243, rs1558478047, rs375695605, rs1558479778, rs1558501648, rs1565240833, rs114727354, rs1557591264, rs1557620758, rs1559099927, rs1561788984, rs369459721, rs1563831738, rs1562159088, rs1562159562, rs1562159599, rs1559094754, rs1559328283, rs755634856, rs1561784687, rs1554122296, rs1561789313, rs1562720119, rs1564363665, rs1561697465, rs1561785003, rs1561787845, rs1561789215, rs1554122305, rs1561784553, rs1561784560, rs1561787690, rs1554122888, rs749632782, rs1567139896, rs1569370887, rs1569371303, rs1564493599, rs1561875779, rs1569146542, rs1569146649, rs1275489527, rs1560115921, rs1468772495, rs749969789, rs1560108090, rs1569376809, rs1569355102, rs1560103306, rs1564365418, rs1559855453, rs1562928193, rs1558149913, rs1253072668, rs141976414, rs1558371790, rs1557898800, rs1567758622, rs1567844041, rs1567844114, rs1567920106, rs1567920209, rs138247472, rs1567974030, rs1567995650, rs1283838287, rs1568003569, rs1568006217, rs1568018905, rs1562505675, rs1561783309, rs1555980234, rs1559087186, rs1560966086, rs1560330387, rs769471341, rs1562493608, rs1562505335, rs1554121861, rs1554122200, rs1562957809, rs1568097623, rs1391600900, rs1568234874, rs1568235086, rs1555990955, rs1567870541, rs1557570794, rs1562869207, rs1571818248, rs1431778557, rs369691608, rs1595808957, rs1597665063, rs1597846084, rs1603401125, rs1603350606, rs1601946481, rs1601932069, rs1602880906, rs1602308324, rs1574554519, rs1573882268, rs1603198937, rs1558148010, rs1558498928, rs1569459580, rs1569380375, rs1560062082, rs1557889974, rs1558414255, rs756429763, rs781663444, rs1569016820, rs1569017025, rs1569017160, rs1557612048, rs1568504941, rs1581987022, rs1576983339, rs1599892470, rs1265340906, rs1602284689, rs1574949440, rs1576220938, rs1576280892, rs1576288424, rs1574459612, rs1574511051, rs1575654528, rs1577094794, rs1294683568, rs771819481, rs1580984895, rs1581338441, rs1580988138, rs1581980317, rs1581986872, rs1554121207, rs1581987268, rs1581987476, rs1581987885, rs763770519, rs1581991929, rs1581992099, rs1581992998, rs1581995453, rs1554122242, rs1581996778, rs1581997228, rs1588735247, rs1555980467, rs1555985742, rs1601319086, rs1601970168, rs1574451881, rs876661168, rs1576994053, rs1573589807, rs1581036396, rs1601267617, rs1572531830, rs1573483715, rs1590954686, rs1601315812, rs1573965358, rs1573972562, rs529087882, rs1570609440, rs1598940393, rs1575333081, rs1576028676, rs1596476657, rs1599375711, rs1603290366, rs1603060007, rs1603069440, rs1592939069, rs1591612223, rs2062994512, rs373701249, rs1600471396, rs1600501018, rs1600504088, rs1600514073, rs748436953, rs765723607, rs758170522, rs1561785045, rs1357591960, rs1591609136, rs1596891223, rs1579370234, rs2047850664, rs1579109565, rs1870202051, rs1574887674, rs778229060, rs1572531281, rs1570622663, rs1573501865, rs1576086299, rs1576164991, rs1574907198, rs1576656734, rs1554121438, rs1581995425, rs1581996813, rs1582001015, rs1588324025, rs1591371152, rs1590008294, rs1590956245, rs1590028691, rs1591606580, rs1591611001, rs1591612317, rs1591612370, rs763436882, rs997044541, rs1595897117, rs747706524, rs1579377990, rs1201878175, rs1894051550, rs1572531730, rs1579576029, rs1577017863, rs752545577, rs1582461267, rs1589460606, rs1588727276, rs1598620094, rs1599368323, rs1600082188, rs1601319352, rs1598226304, rs2076013475, rs2076017638, rs1600596180, rs1554121932, rs1680676671, rs1570607996, rs1382444181, rs1570640673, rs1574994308, rs1596667777, rs1602226289, rs1595629181, rs1595609005, rs1227643933, rs1572705473, rs1570621899, rs1722830922, rs1575094649, rs1417035592, rs1581997098, rs1589457762, rs1598211790, rs758726258, rs1601071971, rs863224922, rs1586692481, rs1586692548, rs1586692551, rs1580988074, rs1594129609, rs1588732344, rs1579368865, rs1586660389, rs1586660370, rs1586660338, rs1586657848, rs1586660381, rs1791701214, rs752676391, rs1680673822, rs758098717, rs1726676630, rs762288077, rs1759964009, rs1760905766, rs1761021165, rs1554121934, rs2055849544, rs1049773, rs587784300, rs1861628072, rs1761241410, rs1064797322, rs1948652423, rs2059194330, rs1777174302, rs2054280202, rs2081190512, rs772665884, rs1400164869, rs1861593395, rs1760897843, rs1761087122, rs1388355040, rs2068797192, rs1777175608, rs376898131	30290154
Nystagmus	Nystagmus	rs137852207, rs137852208, rs1928435502, rs137852209, rs137852210, rs1929191668, rs137852211, rs137852212, rs2124209414, rs387906720, rs387906721, rs1602791884, rs786205896

Unknown
Disease name	Disease term	dbSNP ID	References
Camptodactyly of fingers	Clinodactyly of the 5th finger
Hypertrichosis	Hypertrichosis		30290154
Macrostomia	Macrostomia
Micrognathism	Micrognathism
Motor delay	Clumsiness - motor delay
Synophrys	Synophrys