Physical interactions of Dmnk with Orb: implications in the regulated localization of Orb by Dmnk during oogenesis and embryogenesis.
Biochem Biophys Res Commun
; 290(1): 225-9, 2002 Jan 11.
Article
em En
| MEDLINE
| ID: mdl-11779157
ABSTRACT
The Dmnk (Drosophila maternal nuclear kinase) gene, encoding a nuclear protein serine/threonine kinase, is expressed predominantly in the germline cells during embryogenesis, suggesting its possible role in the establishment of germ cells. We report here that Dmnk interacts physically with Drosophila RNA binding protein Orb, which plays crucial roles in the establishment of Drosophila oocyte by regulating the distribution and translation of several maternal mRNAs. Considering similar spatiotemporal expression pattern of Dmnk and orb during oogenesis and early embryogenesis, it is suggested that Dmnk plays a role in establishment of germ cells by interacting with Orb. Although there are two forms of Dmnk proteins, Dmnk-L (long) and Dmnk-S (short) via the developmentally regulated alternative splicing, Orb can associate with both forms of Dmnk proteins when expressed in culture cells. However, immunohistochemical analysis revealed that Dmnk-S, but not Dmnk-L, can affect the subcellular localization of Orb in a kinase activity-dependent manner, suggesting differential functions of Dmnk-S and Dmnk-L in the regulation of Orb.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oócitos
/
Proteínas de Ligação a RNA
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Proteínas Serina-Treonina Quinases
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Proteínas de Drosophila
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Drosophila melanogaster
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Embrião não Mamífero
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Biochem Biophys Res Commun
Ano de publicação:
2002
Tipo de documento:
Article