Bmcc1s interacts with the phosphate-activated glutaminase in the brain

► Bmcc1s interacts directly with KGA. ► The BCH-domain of Bmcc1s could dock to the N-terminal part KGA. ► Bmcc1s is not enriched in the mitochondria. ► Overexpression of Bmcc1s leads to the cytoplasmic accumulation of KGA.