Transfer of molecules from ejaculate to females in Drosophila melanogaster and Drosophila pseudoobscura |
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| Institution: | 1. Department of Molecular Biology, Mayfield Road, University of Edinburgh, King''s Buildings, Edinburgh, Scotland;2. Department of Zoology, West Mains Road, University of Edinburgh, King''s Buildings, Edinburgh, Scotland;1. Biomedical Pioneering Innovation Center (BIOPIC), Peking University, Beijing, P.R. China;2. Changping Laboratory, Beijing, P.R. China;3. College of Chemistry and Molecular Engineering, Peking University, Beijing, P.R. China;4. School of Life Sciences, Peking University, Beijing, P.R. China;5. Beijing Ditan Hospital, Capital Medical University, Beijing, P.R. China;6. Key Laboratory of Human Disease Comparative Medicine, Chinese Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Remerging Infectious Diseases, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, P.R. China;7. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China;8. Joint Graduate Program of Peking-Tsinghua-NIBS, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, P.R. China;9. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, P.R. China;10. Sinovac Biotech, Ltd., Beijing, P.R. China;11. Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC), Beijing, P.R. China;12. Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, P.R. China;1. Agricultural Development and Rural Transformation Centre (ADRTC), Institute for Social and Economic Change, Bengaluru, 560072, Karnataka, India;2. Institute for Social and Economic Change, Bengaluru, 560072, Karnataka, India;1. Department of Natural History Science, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan;2. Laboratory of Ecology & Evolutionary Biology, Yunnan University, Kunming 650091, China;3. Division of Science, Yale-NUS College, 138527, Singapore;4. Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan;5. Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan;1. Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany;2. Faculty of Science, Biology Centre of the Czech Academy of Sciences, Institute of Entomology and University of South Bohemia, 37005 Ceske Budejovice, Czech Republic;1. Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany;2. Biotechnologisches Zentrum, Technische Universität Dresden, Tatzberg 47/49, 01309 Dresden, Germany;3. Paul Langerhans Institute Dresden of the Helmholtz Zentrum München at the University Hospital and Faculty of Medicine Carl Gustav Carus of TU Dresden, Technische Universität Dresden, Fetscher Strasse 74, 01307 Dresden, Germany;4. German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany |
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| Abstract: | Methionine in the form of free amino acids, small peptides and several proteins is transferred from ejaculate to females in Drosophila melanogaster and D. pseudoobscura. The male contribution is found mostly in the ovary and the sizes of the polypeptides transferred have been established. Some components of the ejaculate are rapidly transferred to the somatic tissues outside the ovary and reproductive system where they co-migrate with the yolk polypeptides. The incorporation of free methionine into polypeptides in non-reproductive tissues is higher in females that have been deprived of a source of protein prior to mating. The molecules transferred from ejaculate may have roles in regulating reproductive behaviour and may also be used as a nutrient source. We suggest that free amino acids in the ejaculate are rapidly utilised in protein synthesis in the somatic tissues outside the ovary and could provide a boost to yolk protein and hence egg production in females in nature, where nutrients may be in limited supply. |
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