Summary
In oviparous animals large amounts of yolk proteins of extraovarian origin are accumulated by developing oocytes during vitellogenesis. The yolk protein precursors, the vitellogenins (VTG), are transported into the oocytes by receptor-mediated endocytosis. In oocytes of the polychaetous annelid, Nereis virens, the receptor protein for VTG was visualized by ligand blotting studies as a protein with an apparent molecular mass of 190 kDa under non-reducing conditions. Anti-Locusta VTG receptor antibodies recognize the Nereis VTG receptor protein. The Nereis VTG receptor protein binds Locusta and Schistocerca VTG; the VTG receptor proteins of both locust species bind the Nereis vitellin. These results indicate the conservation of structural elements important for internalization of VTG.
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Abbreviations
- CHAPS:
-
3-[(3-cholamidopropyl)dimethyl-ammonio]-1-propane-sulphonic acid
- HBS:
-
HEPES-buffered saline
- PAP:
-
peroxidase-anti-peroxidase
- SDS-PAGE:
-
sodium dodecylsulphate polyacrylamide gel electrophoresis
- TRIS, TBS:
-
TRIS-buffered saline
- VT:
-
vitellin
- VTG:
-
vitellogenin
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Hafer, J., Fischer, A. & Ferenz, H.J. Identification of the yolk receptor protein in oocytes of Nereis virens (Annelida, Polychaeta) and comparison with the locust vitellogenin receptor. J Comp Physiol B 162, 148–152 (1992). https://doi.org/10.1007/BF00398340
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DOI: https://doi.org/10.1007/BF00398340