Marine fish egg hydration is aquaporin-mediated.
until further notice
SourceScience, 307, 5709, (2005), pp. 545
Article / Letter to editor
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SubjectIGMD 9: Renal disorder; NCMLS 5: Membrane transport and intracellular motility; UMCN 5.4: Renal disorders
The positive buoyancy of marine fish eggs in sea water, allowed by hydration of the oocyte, is critical for their survival and dispersion in the ocean. We isolated an aquaporin, SaAQP1o, that belongs to a unique subfamily of aquaporin-1-like channels specifically evolved in teleosts and mainly expressed in the ovary. We further show that hormone-induced fish oocyte hydration is a highly controlled process based on the interplay between protein hydrolysis and the translocation of SaAQP1o to the plasma membrane, indicating a specialized physiological role for this aquaporin.
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