Identification of a suppressor of retinal degeneration in Drosophila photoreceptors

J Neurogenet. 2012 Sep;26(3-4):338-47. doi: 10.3109/01677063.2012.725436. Epub 2012 Oct 8.


During sensory transduction, Drosophila photoreceptors experience substantial increases in intracellular Ca(2+) levels ([Ca(2+)](i)). Nevertheless in a number of mutants associated with excessive Ca(2+) influx through transient receptor potential (TRP) channels, Drosophila photoreceptors undergo loss of normal cellular structure manifest as a retinal degeneration. However, the molecular mechanisms that underpin this degeneration process remain unclear. The authors previously isolated a mutant, su(40), that is able to suppress the retinal degeneration seen in photoreceptors from loss-of-function alleles of rdgA that are known to have constitutively active TRP channels. Here the authors report the genetic mapping of su(40) as well the isolation of additional alleles of su(40). Studies of su(40) as well as these new alleles should facilitate the understanding of the mechanisms by which excessive Ca(2+) influx results in retinal degeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Amino Acid Sequence
  • Animals
  • Animals, Genetically Modified
  • Calcium / metabolism
  • Chromosome Mapping
  • Cloning, Molecular
  • Disease Models, Animal
  • Drosophila Proteins / genetics*
  • Drosophila melanogaster
  • Eye Proteins / genetics
  • Gene Expression Regulation / genetics
  • Green Fluorescent Proteins / genetics
  • Membrane Potentials / genetics
  • Membrane Potentials / physiology
  • Membrane Proteins / genetics
  • Mutagenesis / drug effects
  • Mutation / genetics*
  • Patch-Clamp Techniques
  • Phospholipase C beta / genetics
  • Photoreceptor Cells, Invertebrate / metabolism*
  • Repressor Proteins / genetics*
  • Repressor Proteins / metabolism*
  • Retinal Degeneration* / genetics
  • Retinal Degeneration* / pathology
  • Retinal Degeneration* / therapy
  • Transient Receptor Potential Channels / genetics
  • Transient Receptor Potential Channels / metabolism


  • Drosophila Proteins
  • Eye Proteins
  • Membrane Proteins
  • Repressor Proteins
  • Transient Receptor Potential Channels
  • rdgB protein, Drosophila
  • Green Fluorescent Proteins
  • NorpA protein, Drosophila
  • Phospholipase C beta
  • Calcium