potassium inwardly rectifying channel subfamily J member 2
עודכן לאחרונה 27 Jun 2022
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ה KCNJ2 gene belongs to a large family of genes that provide instructions for making potassium channels. These channels, which transport positively charged potassium ions out of cells, play key roles in a cell's ability to generate and transmit electrical signals.
Normal function
ה KCNJ2 gene belongs to a large family of genes that provide instructions for making potassium channels. These channels, which transport positively charged potassium ions out of cells, play key roles in a cell's ability to generate and transmit electrical signals.
The specific function of a potassium channel depends on its protein components and its location in the body. Channels made with the KCNJ2 protein are active in muscles used for movement (skeletal muscles) and in heart (cardiac) muscle. In skeletal muscle, these channels play an important role in the pattern of muscle tensing (contraction) and relaxation that allows the body to move. In the heart, the channels are involved in recharging the cardiac muscle after each heartbeat to maintain a regular rhythm. Channels formed with the KCNJ2 protein may also be involved in bone development, but their role in this process is unclear.
Researchers have determined that a molecule called PIP2 must attach (bind) to channels made with the KCNJ2 protein for the channels to function normally. PIP2 activates the ion channel and helps it stay open, which allows ions to flow across the cell membrane.
Conditions referring to this gene or chromosome
Other names
cardiac inward rectifier potassium channel
HHBIRK1
HHIRK1
HIRK1
inward rectifier K+ channel KIR2.1
IRK1
IRK2_HUMAN
KIR2.1
LQT7
potassium channel, inwardly rectifying subfamily J, member 2
potassium inwardly-rectifying channel J2
potassium inwardly-rectifying channel, subfamily J, member 2
Related patient information and medicines
Patient information leaflet
פגיעה חריפה בכליות
פגיעה חריפה בכליות can be a confusing name as it suggests an accident או injury to that part of your body, eg from a fall or trauma. If you are not in hospital already, you will be sent to hospital to be looked after. Higher levels mean that the kidneys aren't getting rid of waste produc... There will often be raised potassium (one of the salts.
Patient information leaflet
האם אני יכול לקחת ביסופרולול ורמיפריל יחד?
This might make you feel dizzy, lightheaded, or faint. It can also occasionally lead to increased levels of potassium in your blood או affect how your kidneys work. Why this happens Both medicines work to lower blood pressure but in different ways. Bisoprolol is a beta-blocker that slows the heart rate, while ramipril is an ACE inhibitor that.
Patient information leaflet
האם אני יכול לקחת קו-אמוקסיקלב ורמיפריל יחד?
Taking co-amoxiclav ו ramipril together can occasionally increase the risk of a rare but serious allergic reaction called angioedema (swelling under the skin). It may also increase the risk of high potassium levels in the blood או affect your כליה function, especially if you are already unwell with an infection. Salt substitutes.
Patient information leaflet
האם אני יכול לקחת ביסופרולול ולוסרטן יחד?
לוקח bisoprolol and losartan together can cause your לחץ דם ל drop lower than intended. This may make you feel dizzy, lightheaded, or faint, especially when standing up quickly. Why this happens Both medicines work to lower blood pressure but in different ways. ביסופרולול is a beta-blocker that slows the heart rate, while לוסרטן is an.
Patient information leaflet
האם אני יכול לקחת אמלודיפין ולוסרטן יחד?
לוקח amlodipine and losartan together can cause your לחץ דם ל drop lower than if you took either medicine alone. High potassium levels (hyperkalaemia) Losartan can increase potassium levels in your blood. הבהרה This information is for general educational purposes בלבד and should not be relied upon as a substitute for professional.
Patient information leaflet
האם אני יכול לקחת לוסרטן וכורכום יחד?
High potassium levels (Hyperkalaemia) Losartan can increase potassium levels in your blood. Potassium-rich foods (e.g., bananas, spinach, avocados) and salt substitutes Losartan can increase the levels of potassium in your blood. Consuming large amounts of potassium-rich foods or using salt substitutes containing potassium can lead to dangerously.
קריאה נוספת והפניות
- potassium inwardly rectifying channel subfamily J member 2; MedlinePlus, National Library of Medicine.
- Bendahhou S, Donaldson MR, Plaster NM, Tristani-Firouzi M, Fu YH, Ptacek LJ. Defective potassium channel Kir2.1 trafficking underlies Andersen-Tawil syndrome. J Biol Chem. 2003 Dec 19;278(51):51779-85. doi: 10.1074/jbc.M310278200. Epub 2003 Oct 1.
- Casini S, Postma AV. Decreased inward rectification of Kir2.1 channels is a novel mechanism underlying the short QT syndrome. Cardiovasc Res. 2012 Mar 15;93(4):535-6. doi: 10.1093/cvr/cvs084. Epub 2012 Feb 5. No abstract available.
- Chun TU, Epstein MR, Dick M 2nd, Andelfinger G, Ballester L, Vanoye CG, George AL Jr, Benson DW. Polymorphic ventricular tachycardia and KCNJ2 mutations. Heart Rhythm. 2004 Jul;1(2):235-41. doi: 10.1016/j.hrthm.2004.02.017.
- Donaldson MR, Jensen JL, Tristani-Firouzi M, Tawil R, Bendahhou S, Suarez WA, Cobo AM, Poza JJ, Behr E, Wagstaff J, Szepetowski P, Pereira S, Mozaffar T, Escolar DM, Fu YH, Ptacek LJ. PIP2 binding residues of Kir2.1 are common targets of mutations causing Andersen syndrome. Neurology. 2003 Jun 10;60(11):1811-6. doi: 10.1212/01.wnl.0000072261.14060.47.
- Hattori T, Makiyama T, Akao M, Ehara E, Ohno S, Iguchi M, Nishio Y, Sasaki K, Itoh H, Yokode M, Kita T, Horie M, Kimura T. A novel gain-of-function KCNJ2 mutation associated with short-QT syndrome impairs inward rectification of Kir2.1 currents. Cardiovasc Res. 2012 Mar 15;93(4):666-73. doi: 10.1093/cvr/cvr329. Epub 2011 Dec 8.
- Kimura H, Zhou J, Kawamura M, Itoh H, Mizusawa Y, Ding WG, Wu J, Ohno S, Makiyama T, Miyamoto A, Naiki N, Wang Q, Xie Y, Suzuki T, Tateno S, Nakamura Y, Zang WJ, Ito M, Matsuura H, Horie M. Phenotype variability in patients carrying KCNJ2 mutations. Circ Cardiovasc Genet. 2012 Jun;5(3):344-53. doi: 10.1161/CIRCGENETICS.111.962316. Epub 2012 May 15.
- Nguyen HL, Pieper GH, Wilders R. Andersen-Tawil syndrome: clinical and molecular aspects. Int J Cardiol. 2013 Dec 5;170(1):1-16. doi: 10.1016/j.ijcard.2013.10.010.
- Plaster NM, Tawil R, Tristani-Firouzi M, Canun S, Bendahhou S, Tsunoda A, Donaldson MR, Iannaccone ST, Brunt E, Barohn R, Clark J, Deymeer F, George AL Jr, Fish FA, Hahn A, Nitu A, Ozdemir C, Serdaroglu P, Subramony SH, Wolfe G, Fu YH, Ptacek LJ. Mutations in Kir2.1 cause the developmental and episodic electrical phenotypes of Andersen's syndrome. Cell. 2001 May 18;105(4):511-9. doi: 10.1016/s0092-8674(01)00342-7.
- Priori SG, Pandit SV, Rivolta I, Berenfeld O, Ronchetti E, Dhamoon A, Napolitano C, Anumonwo J, di Barletta MR, Gudapakkam S, Bosi G, Stramba-Badiale M, Jalife J. A novel form of short QT syndrome (SQT3) is caused by a mutation in the KCNJ2 gene. Circ Res. 2005 Apr 15;96(7):800-7. doi: 10.1161/01.RES.0000162101.76263.8c. Epub 2005 Mar 10.
- Schulze-Bahr E. Short QT syndrome or Andersen syndrome: Yin and Yang of Kir2.1 channel dysfunction. Circ Res. 2005 Apr 15;96(7):703-4. doi: 10.1161/01.RES.0000164186.86838.09. No abstract available.
- Tristani-Firouzi M, Jensen JL, Donaldson MR, Sansone V, Meola G, Hahn A, Bendahhou S, Kwiecinski H, Fidzianska A, Plaster N, Fu YH, Ptacek LJ, Tawil R. Functional and clinical characterization of KCNJ2 mutations associated with LQT7 (Andersen syndrome). J Clin Invest. 2002 Aug;110(3):381-8. doi: 10.1172/JCI15183.
- Veerapandiyan A, Statland JM, Tawil R. Andersen-Tawil Syndrome. 2004 Nov 22 [updated 2018 Jun 7]. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK1264/
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