The RanGEFBj1 promotes prospero nuclear export and neuroblast self-renewal
| Autor: | Chris Q. Doe, Keiko Hirono, Tasha Joy |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
animal structures
biology fungi Prospero biology.organism_classification Cellular and Molecular Neuroscience nervous system Developmental Neuroscience Neuroblast embryonic structures Ran Nuclear transport Stem cell Nuclear export signal Neuroscience Ganglion mother cell reproductive and urinary physiology Neuroblast differentiation |
| Zdroj: | Developmental Neurobiology. 75:485-493 |
| ISSN: | 1932-8451 |
| DOI: | 10.1002/dneu.22237 |
| Popis: | Drosophila larval neuroblasts are a model system for studying stem cell self-renewal and differentiation. Here, we report a novel role for the Drosophila gene Bj1 in promoting larval neuroblast self-renewal. Bj1 is the guanine-nucleotide exchange factor for Ran GTPase, which regulates nuclear import/export. Bj1 transcripts are highly enriched in larval brain neuroblasts (in both central brain and optic lobe), while Bj1 protein is detected in both neuroblasts and their neuronal progeny. Loss of Bj1 using both mutants or RNAi causes a progressive loss of larval neuroblasts, showing that Bj1 is required to maintain neuroblast numbers. Loss of Bj1 does not result in neuroblast apoptosis, but rather leads to abnormal nuclear accumulation of the differentiation factor Prospero, and premature neuroblast differentiation. We conclude that the Bj1 RanGEF promotes Prospero nuclear export and neuroblast self-renewal. © 2014 Wiley Periodicals, Inc. Develop Neurobiol 75: 485–493, 2015 |
| Databáze: | OpenAIRE |
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