PMID- 10575198 OWN - NLM STAT- MEDLINE DCOM- 20000508 LR - 20190212 IS - 1015-8987 (Print) IS - 1015-8987 (Linking) VI - 9 IP - 4-5 DP - 1999 TI - Biophysical properties and molecular basis of cardiac rapid and slow delayed rectifier potassium channels. PG - 201-16 AB - Normal cardiac action potential repolarization is dependent on activation of several K(+) currents, including I(Kr) and I(Ks). I(Kr) activates rapidly at positive potentials, exhibits inward rectification caused by C-type inactivation, and is potently blocked by methanesulfon-anilide antiarrhythmic drugs and several other common medications. I(Ks) activates very slowly, does not inactivate and is blocked by some benzodiazepines and a chromanol. HERG encodes subunits that form channels that mediate I(Kr). KVLQT1 and minK encode subunits that coassemble to form channels that mediate I(Ks). Mutations in any of these genes cause long QT syndrome, a disorder of cardiac repolarization that predisposes individuals to lethal arrhythmias. In this review, we summarize recent studies of the biophysical and pharmacological properties of HERG and KvLQT1/minK K(+) channels. CI - Copyright 1999 S. Karger AG, Basel FAU - Mitcheson, J S AU - Mitcheson JS AD - Department of Medicine, Division of Cardiology, Eccles Program in Human Molecular Biology and Genetics, University of Utah, Salt Lake City, Utah 84112, USA. FAU - Sanguinetti, M C AU - Sanguinetti MC LA - eng GR - HL55236/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PT - Review PL - Germany TA - Cell Physiol Biochem JT - Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology JID - 9113221 RN - 0 (Cation Transport Proteins) RN - 0 (DNA-Binding Proteins) RN - 0 (ERG protein, human) RN - 0 (ERG1 Potassium Channel) RN - 0 (Ether-A-Go-Go Potassium Channels) RN - 0 (KCNH2 protein, human) RN - 0 (KCNH6 protein, human) RN - 0 (Potassium Channels) RN - 0 (Potassium Channels, Voltage-Gated) RN - 0 (Trans-Activators) RN - 0 (Transcriptional Regulator ERG) SB - IM MH - Animals MH - *Cation Transport Proteins MH - *DNA-Binding Proteins MH - ERG1 Potassium Channel MH - Ether-A-Go-Go Potassium Channels MH - Heart/*physiology/physiopathology MH - Humans MH - Long QT Syndrome/physiopathology MH - Potassium Channels/chemistry/genetics/*physiology MH - *Potassium Channels, Voltage-Gated MH - *Trans-Activators MH - Transcriptional Regulator ERG RF - 136 EDAT- 1999/11/27 09:00 MHDA- 2000/05/16 09:00 CRDT- 1999/11/27 09:00 PHST- 1999/11/27 09:00 [pubmed] PHST- 2000/05/16 09:00 [medline] PHST- 1999/11/27 09:00 [entrez] AID - 16317 [pii] AID - 10.1159/000016317 [doi] PST - ppublish SO - Cell Physiol Biochem. 1999;9(4-5):201-16. doi: 10.1159/000016317.