Regulatory factors controlling muscle mass: Competition between innate immune function and anabolic signals in regulation of atrogin-1 in Atlantic salmon

•Atrogin-1 is a key protein involved in protein reallocation and protein degradation.•Atrogin-1 promoter contains conserved transcription factor binding sites across vertebrates.•In fish atrogin-1 promoter responds to proinflammatory cytokines, interferons and insulin like growth factor-1.