| Chapter title |
RNA Localization in the Vertebrate Oocyte: Establishment of Oocyte Polarity and Localized mRNA Assemblages
|
|---|---|
| Chapter number | 9 |
| Book title |
Oocytes
|
| Published in |
Results and problems in cell differentiation, January 2017
|
| DOI | 10.1007/978-3-319-60855-6_9 |
| Pubmed ID | |
| Book ISBNs |
978-3-31-960854-9, 978-3-31-960855-6
|
| Authors |
Denise Oh, Douglas W. Houston |
| Abstract |
RNA localization is a fundamental mechanism for controlling cell structure and function. Early development in fish and amphibians requires the localization of specific mRNAs to establish the initial differences in cell fates prior to the onset of zygotic genome activation. RNA localization in these oocytes (e.g., Xenopus and zebrafish) requires that animal-vegetal polarity be established early in oogenesis, mediated by formation of the Balbiani body/mitochondrial cloud. This structure serves as a platform for assembly and transport of germline determinants to the future vegetal pole and also sets up the machinery for the localization of non-germline transcripts later in oogenesis. Understanding these polarization and localization mechanisms is critical for understanding the basis for early embryonic development in these organisms and also for understanding the role of RNA compartmentalization in animal gametogenesis. Here we outline recent advances in elucidating the molecular basis for the establishment of oocyte polarity at the level of Balbiani body assembly as well as the formation of RNP assemblies for early and late pathway mRNA localization in the oocyte. |
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