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Histochem Cell Biol
2015 Aug 01;1442:157-66. doi: 10.1007/s00418-015-1323-5.
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Dynamic intracellular localization of Dazl protein during Xenopus germline development.
Tada H
,
Orii H
.
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Xenopus dazl encoding an RNA-binding protein has been identified as a component of the germ plasm and is involved in the migration and differentiation of the primordial germ cells (PGCs). Here, we investigated the intracellular localization of Dazl in germline cells throughout the lifetime of Xenopus. In early embryogenesis, Dazl was detected initially in the germ plasm and then translocated to a perinuclear region. Then, it was detected within the nucleus in PGCs. Dazl was observed only in the cytoplasm in PGCs when sex differentiation began in the gonads. Dazl was distributed in both the nucleus and cytoplasm of the primary oogonium and spermatogonium, but only in the cytoplasm of the secondary oogonium and spermatogonium. In spermatocytes, Dazl was distributed throughout cytoplasm and localized at the spindles and cytoplasm during meiosis. Then, it was detected as speckles in the nucleus in the round spermatid. The dynamic intracellular localization suggests that Dazl is a multifunctional protein regulating RNA metabolism required for Xenopus germline development.
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