Construct: Amino acid replacement: R228Q.
Hsap\KCNJ2R228Q.UAS.EGFP, inaC2 has photoreceptor phenotype
Hsap\KCNJ2R228Q.UAS.EGFP, trp9 has photoreceptor phenotype
In inaC2 photoreceptors expressing Hsap\KCNJ2R228Q.Scer\UAS.T:Avic\GFP-EGFP channels, the PIP2-sensitive current is suppressed by more than 50%, while it is only suppressed by 20% in wild-type photoreceptors. After depletion, the Hsap\KCNJ2R228Q.Scer\UAS.T:Avic\GFP-EGFP current recovers in the dark as PIP2 is resynthesised with a timecourse that is indistinguishable from controls. Similarly, the PIP2-sensitive current is suppressed by a significantly greater extent in trp9 photoreceptors than in wild-type photoreceptors.