Role of ERG1 isoforms in modulation of ERG1 channel trafficking and function.
The 'ether-a-go-go-related' gene type 1 (ERG1 or Kv11.1) protein is the product of the KCNH2 gene. Currents generated by ERG1 channels are important in a range of tissues including neuronal, smooth muscle, and cardiac tissues, as well as in cancer cells. There are five known isoforms of the ERG1 protein. Overlapping patterns of endogenous expression of ERG1 isoforms have been described in several tissue types. Abnormal changes in the relative abundance of ERG1 isoforms may result in disease. Recent studies have suggested that the different isoforms play a prominent role in expression and trafficking of ERG1 channels as well as in modulating the electrophysiological properties of the channels. This review focuses on the differences between the ERG1 isoforms and describes the physiological implications thereof. It is described how changes in the relative expression level of the isoforms may have significant physiological consequences by modulation of tissue excitability. Additionally, the review proposes a standardized nomenclature of ERG1 isoforms based on their structural features.
Larsen
Anders Peter
AP
The Danish National Research Foundation Centre for Cardiac Arrhythmia, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark. larsen@cvrti.utah.edu
D000818:Animals; D000072237:ERG1 Potassium Channel; D051638:Ether-A-Go-Go Potassium Channels / Q000145:classification / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D015640:Ion Channel Gating; D020033:Protein Isoforms / Q000502:physiology; D011499:Protein Processing, Post-Translational; D009626:Terminology as Topic
D000072237:ERG1 Potassium Channel; D051638:Ether-A-Go-Go Potassium Channels; C000606913:KCNH2 protein, human; D020033:Protein Isoforms