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Getting in shape: ATP pumps up the volume in Hh signalling

Glycolysis is a major metabolic process which ensures the break down of glucose into pyruvate via multiple enzymatic steps, but if and how this catabolism can impact on developmental patterning is unclear. In this issue, Spannl et al (2020) demonstrate a novel link between energy metabolism and tissue formation in the fly imaginal discs. They show that ATPs generated via glycolysis maintain active transport of a smoothened inhibitor, which keeps Hh signalling in check to preserve the correct shape and proportion of the developing wing.