Predicted to enable sodium channel regulator activity; transmembrane transporter binding activity; and voltage-gated sodium channel activity involved in cardiac muscle cell action potential. Predicted to be involved in several processes, including cardiac muscle cell action potential; regulation of heart rate by cardiac conduction; and regulation of ion transport. Predicted to act upstream of or within sodium ion transmembrane transport. Located in plasma membrane. Human ortholog(s) of this gene implicated in long QT syndrome 10. Orthologous to human SCN4B (sodium voltage-gated channel beta subunit 4). [provided by Alliance of Genome Resources, Apr 2022]