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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The levels of the bancal product, a Drosophila homologue of vertebrate hnRNP K protein, affect cell proliferation and apoptosis in imaginal disc cells.

We have characterized the Drosophila bancal gene, which encodes a Drosophila homologue of the vertebrate hnRNP K protein. The bancal gene is essential for the correct size of adult appendages. Reduction of appendage size in bancal mutant flies appears to be due mainly to a reduction in the number of cell divisions in the imaginal discs. Transgenes expressing Drosophila or human hnRNP K are able to rescue weak bancal phenotype, showing the functional similarity of these proteins in vivo. High levels of either human or Drosophila hnRNP K protein in imaginal discs induces programmed cell death. Expression of the antiapoptotic P35 protein suppresses this phenotype in the eye, suggesting that apoptosis is the major cellular defect caused by overexpression of K protein. Finally, the human K protein acts as a negative regulator of bancal gene expression. We propose that negative autoregulation limits the level of Bancal protein produced in vivo.[1]


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