A wide pore channel activity that enables a direct cytoplasmic connection from an SA node cell to an atrial cardiomyocyte. The gap junction passes electrical signals between the cells contributing to cardiac conduction.
Synonyms:
exact_synonym:
gap junction channel activity involved in SA node cell-atrial cardiomyocyte electrical coupling; gap junction channel activity involved in SAN cell-atrial cardiomyocyte electrical coupling; gap junction channel activity involved in sinoatrial node cell-atrial cardiomyocyte electrical coupling
narrow_synonym:
gap junction channel activity involved in sinus node cell-atrial cardiomyocyte electrical coupling