Transfer RNA-mediated restoration of potassium current and electrical correction in premature termination long-QT syndrome hERG mutants.

ABSTRACT: Disease-causing premature termination codons (PTCs) individually disrupt the functional expression of hundreds of genes and represent a pernicious clinical challenge. In the heart, loss-of-function mutations in the hERG potassium channel account for approximately 30% of long-QT syndrome arrhythmia, a lethal cardiac disorder with limited treatment options. Premature termination of ribosomal translation produces a truncated and, for potassium channels, a potentially dominant-negative protein that impairs the functional assembly of the wild-type homotetrameric hERG channel complex. We used high-throughput flow cytometry and patch-clamp electrophysiology to assess the trafficking and voltage-dependent activity of hERG channels carrying patient PTC variants that have been corrected by anticodon

SUBMITTER: Blomquist VG 

PROVIDER: S-EPMC10568093 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature