例如:"lncRNA", "apoptosis", "WRKY"

A dominant negative allele of the Drosophila leucine zipper protein Bunched blocks bunched function during tissue patterning.

Mech. Dev.2007 Aug;124(7-8):559-69. Epub 2007 May 24
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摘要


The bunched (bun) gene encodes the Drosophila member of the TSC-22/GILZ family of leucine zipper transcriptional regulators. The bun locus encodes multiple BUN protein isoforms and has diverse roles during patterning of the eye, wing margin, dorsal notum and eggshell. Here we report the construction and activity of a dominant negative allele (BunDN) of the BUN-B isoform. In the ovary, BunDN expression in the follicle cells (FC) resulted in epithelial defects including aberrant accumulation of DE-cadherin and failure to rearrange into columnar FC cell shapes. BunDN expression in the posterior FC led to loss of epithelial integrity associated with extensive apoptosis. BunDN FC phenotypes collectively resemble loss-of-function bun mutant phenotypes. BunDN expression using tissue-specific imaginal disk drivers resulted in characteristic cuticular patterning defects that were enhanced by bun mutations and suppressed by co-expression of the BUN-B protein isoform. These data indicate that BunDN has dominant negative activity useful to identify bun functions and genetic interactions that occur during tissue patterning.

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