ATP6AP2 bearing a Leu98Ser substitution in the extracellular domain, which is associated with a glycosylation disorder in the human ortholog, is expressed under the control of its own regulatory region.
CT9261239TC
L98S | ATP6AP2-PA
L98S
Analogous L98S mutation in human ATP6AP2 implicated in congenital disorder of glycosylation; mutation carried on in vitro construct.
ATP6AP2Δ1 homozygotes bearing ATP6AP2L98S display severe mortality during the pupal stage; the surviving adult display poor mobility, decreased or absent climbing capabilities, blistered wings, and reduced head size and die 3 to 4 days after eclosion, as compared to controls.
ATP6AP2Δ1 homozygous third instar larvae bearing ATP6AP2L98S display a severe increases in the number of both optic lobe neuroblasts and of both optic lobe and central brain neurons (during mid-to-late third instar), and display a severe increase in the size of fat body lipid droplets, as compared to controls. In a ATP6AP2Δ1-homozygous background, ATP6AP2L98S clones exhibit significant increases in the size of lipid droplets and in the number of autophagosomes/lysosomes (identified as Lysotracker-positive or Atg8a-positive puncta) in the third instar larval fat body, as compared to neighboring ATP6AP2T:Hsap\MYC clones.