Testis-specific ATP synthase peripheral stalk subunits required for tissue-specific mitochondrial morphogenesis in Drosophila.

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  • Additional Information
    • Source:
      Publisher: BioMed Central Country of Publication: England NLM ID: 100966972 Publication Model: Electronic Cited Medium: Internet ISSN: 1471-2121 (Electronic) Linking ISSN: 14712121 NLM ISO Abbreviation: BMC Cell Biol Subsets: MEDLINE
    • Publication Information:
      Original Publication: London : BioMed Central, [2000-
    • Subject Terms:
      Morphogenesis*; Drosophila Proteins/*metabolism ; Mitochondria/*metabolism ; Mitochondrial Proton-Translocating ATPases/*metabolism ; Protein Subunits/*metabolism ; Proton-Translocating ATPases/*metabolism ; Testis/*embryology; Animals ; Drosophila melanogaster/enzymology ; Evolution, Molecular ; Flight, Animal/physiology ; Gene Knockdown Techniques ; Genes, Insect ; Green Fluorescent Proteins/metabolism ; Male ; Mitochondrial Proton-Translocating ATPases/chemistry ; Mitochondrial Proton-Translocating ATPases/genetics ; Models, Biological ; Muscle, Skeletal/metabolism ; Mutation/genetics ; Organ Specificity ; Phenotype ; Phylogeny ; Protein Multimerization ; Protein Subunits/genetics ; RNA Interference ; Spermatids/metabolism ; Spermatogenesis
    • Abstract:
      Background: In Drosophila early post-meiotic spermatids, mitochondria undergo dramatic shaping into the Nebenkern, a spherical body with complex internal structure that contains two interwrapped giant mitochondrial derivatives. The purpose of this study was to elucidate genetic and molecular mechanisms underlying the shaping of this structure.
      Results: The knotted onions (knon) gene encodes an unconventionally large testis-specific paralog of ATP synthase subunit d and is required for internal structure of the Nebenkern as well as its subsequent disassembly and elongation. Knon localizes to spermatid mitochondria and, when exogenously expressed in flight muscle, alters the ratio of ATP synthase complex dimers to monomers. By RNAi knockdown we uncovered mitochondrial shaping roles for other testis-expressed ATP synthase subunits.
      Conclusions: We demonstrate the first known instance of a tissue-specific ATP synthase subunit affecting tissue-specific mitochondrial morphogenesis. Since ATP synthase dimerization is known to affect the degree of inner mitochondrial membrane curvature in other systems, the effect of Knon and other testis-specific paralogs of ATP synthase subunits may be to mediate differential membrane curvature within the Nebenkern.
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    • Grant Information:
      United States HHMI Howard Hughes Medical Institute
    • Contributed Indexing:
      Keywords: ATP synthase; Cristae; Drosophila melanogaster; Mitochondria; Spermatogenesis
    • Accession Number:
      0 (Drosophila Proteins)
      0 (Knon protein, Drosophila)
      0 (Protein Subunits)
      147336-22-9 (Green Fluorescent Proteins)
      EC 3.6.3.- (Mitochondrial Proton-Translocating ATPases)
      EC 3.6.3.14 (Proton-Translocating ATPases)
    • Publication Date:
      Date Created: 20170325 Date Completed: 20170516 Latest Revision: 20211020
    • Publication Date:
      20240829
    • Accession Number:
      PMC5364652
    • Accession Number:
      10.1186/s12860-017-0132-1
    • Accession Number:
      28335714