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Citation
Sawyer, E.M., Brunner, E.C., Hwang, Y., Ivey, L.E., Brown, O., Bannon, M., Akrobetu, D., Sheaffer, K.E., Morgan, O., Field, C.O., Suresh, N., Gordon, M.G., Gunnell, E.T., Regruto, L.A., Wood, C.G., Fuller, M.T., Hales, K.G. (2017). Testis-specific ATP synthase peripheral stalk subunits required for tissue-specific mitochondrial morphogenesis in Drosophila.  BMC Cell Biol. 18(1): 16.
FlyBase ID
FBrf0235082
Publication Type
Research paper
Abstract

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. 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. 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.

PubMed ID
PubMed Central ID
PMC5364652 (PMC) (EuropePMC)
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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    BMC Cell Biol.
    Title
    BMC Cell Biology
    Publication Year
    2000-
    ISBN/ISSN
    1471-2121
    Data From Reference