The Drosophila morphogen gradient of Bicoid (Bcd) initiates anterior–posterior (AP) patterning; however, it is poorly understood how its ability to activate a target gene may have an impact on this process. Here we report an F-box protein, Dampened (Dmpd) as a nuclear cofactor of Bcd that can enhance its activating potency. We establish a quantitative platform to specifically investigate two parameters of a Bcd target gene response, expression amplitude and boundary position. We show that embryos lacking Dmpd have a reduced amplitude of Bcd-activated hunchback (hb) expression at a critical time of development. This is because of a reduced Bcd-dependent transcribing probability. This defect is faithfully propagated further downstream of the AP-patterning network to alter the spatial characteristics of even-skipped (eve) stripes. Thus, unlike another Bcd-interacting F-box protein Fate-shifted (Fsd), which controls AP patterning through regulating the Bcd gradient profile, Dmpd achieves its patterning role through regulating the activating potency of Bcd. The morphogen Bicoid regulates anterior–posterior patterning in the early Drosophila embryo by locally activating its target genes such as hunchback. Here, the authors identify the F-box protein Dampened as a regulator of Bicoid-dependent transcriptional activation of hunchback.
ABSTRACT
PUBLICATION RECORD
- Publication year
2013
- Venue
Nature Communications
- Publication date
2013-12-16
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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