Biochemical Genetics

, Volume 29, Issue 5–6, pp 215–239 | Cite as

Genetic control and expression of the major ejaculatory bulb protein (PEB-me) inDrosophila melanogaster

  • Michael Z. Ludwig
  • Ilya I. Uspensky
  • Andrew I. Ivanov
  • Maria R. Kopantseva
  • Christem M. Dianov
  • Natalia A. Tamarina
  • Leonid I. Korochkin


PEB-me is a predominant protein of matureDrosophila melanogaster ejaculatory bulbs. It is resolved into four or five closely spaced subfractions (apparent molecular weight 35–39 kD) by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Four electrophoretic variants of PEB-me differing in apparent molecular weight by 200–800 daltons were found. These appear to be controlled by four alleles of a gene (peb) located by recombination and deletion mapping to the 60F1-2 region of chromosome 2. A minor ejaculatory bulb protein of ca. 80 kD (hPEB) was found to be immunochemically related to PEB and possibly encoded bypeb. PEB is not detected by immunoblotting techniques in virgin females, in male tissues other than the ejaculatory bulb, or during developmental stages preceding the formation of this organ. The results of transplantations of genital imaginal discs and of immature ejaculatory bulbs between two strains having different PEB alleles suggest that the ejaculatory bulb is the site of PEB synthesis. In flies mutant fortra, tra-2, dsx, orix, tissue specificity of PEB localization is retained and the protein is found whenever the ejaculatory bulb is formed, regardless of the chromosomal sex of the fly. The protein is transferred into the female genital duct during mating, where it can be detected for up to 12 hr. Possible functions of PEB inDrosophila reproduction are discussed.

Key words

Drosophila melanogaster tissue-specific protein sex-specific protein genetic mapping genetic polymorphism reproduction-associated protein 


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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Michael Z. Ludwig
    • 1
  • Ilya I. Uspensky
    • 1
  • Andrew I. Ivanov
    • 2
  • Maria R. Kopantseva
    • 1
  • Christem M. Dianov
    • 1
  • Natalia A. Tamarina
    • 1
  • Leonid I. Korochkin
    • 1
  1. 1.Department of Molecular Biology of DevelopmentKoltzov Institute of Developmental BiologyMoscowUSSR
  2. 2.Department of GeneticsKoltzov Institute of Developmental BiologyMoscowUSSR

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