In heart muscle cells, a region of the sarcolemmal membrane periodically invaginates to form T tubules, a specialized membrane domain that contains important ion channels regulating cell contraction. Robin Shaw and his colleagues describe how a cardiac-specific splice variant of the isoform of the protein BIN1 helps make folds in T tubules, which affects the ability of ions in the extracellular space to freely diffuse and protects the heart from arrhythmia.
- TingTing Hong
- Huanghe Yang
- Robin M Shaw