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- W1558777737 abstract "Abstract parkin loss‐of‐function mutations are linked to autosomal recessive juvenile parkinsonism. Parkin is an E3 ubiquitin ligase that promotes degradation of specific target proteins by the proteasome. It has been proposed that loss of Parkin activity will result in accumulation of its substrates, thus leading to dopaminergic (DA) neuron death. In Drosophila, parkin mutations cause degeneration of a subset of DA neurons in the brain but no Parkin substrates have yet been described. Here we characterized the septin 4 gene, which encodes the Drosophila orthologue of human CDCrel‐1, a Parkin substrate. We showed that Septin 4 overexpression causes age‐dependent disruption of DA neuron integrity in the dorsomedial cluster, which is suppressed by coexpression of Parkin and enhanced by reducing parkin function. Furthermore, other phenotypes caused by Septin 4 overexpression are also enhanced in a heterozygous parkin mutant background. This indicates that Septin 4 accumulation is toxic for DA neurons and suggests that Septin 4 could be a genuine substrate of Drosophila Parkin. Regarding this, we also showed that both proteins are able to interact physically with each other in vitro , thus supporting this hypothesis." @default.
- W1558777737 created "2016-06-24" @default.
- W1558777737 creator A5034821632 @default.
- W1558777737 creator A5088823515 @default.
- W1558777737 date "2007-11-16" @default.
- W1558777737 modified "2023-10-16" @default.
- W1558777737 title "Overexpression of Septin 4, the <i>Drosophila</i> homologue of human CDCrel‐1, is toxic for dopaminergic neurons" @default.
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- W1558777737 doi "https://doi.org/10.1111/j.1460-9568.2007.05937.x" @default.
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