Contributes to AMP-activated protein kinase activity. Predicted to be involved in cellular response to glucose starvation; protein phosphorylation; and regulation of catalytic activity. Predicted to act upstream of or within glycogen biosynthetic process; glycolytic process; and response to muscle activity involved in regulation of muscle adaptation. Part of nucleotide-activated protein kinase complex. Orthologous to human PRKAG3 (protein kinase AMP-activated non-catalytic subunit gamma 3). [provided by Alliance of Genome Resources, Apr 2022]