Dampened regulates the activating potency of Bicoid and the embryonic patterning outcome in Drosophila.
Dampened regulates the activating potency of Bicoid and the embryonic patterning outcome in Drosophila.
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DOI:
10.1038/ncomms3968
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发表时间:
2013
影响因子:
16.6
通讯作者:
Ma, Jun
中科院分区:
文献类型:
--
作者:
Liu, Junbo;Ma, Jun
The Drosophila morphogen gradient of Bicoid (Bcd) initiates anterior-posterior (AP) patterning, but it is poorly understood how its ability to activate a target gene may impact this process. Here we report an F-box protein, Dampened (Dmpd) as a nuclear co-factor 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 due to 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 Fates-shifted (Fsd), which controls AP patterning through regulating the Bcd gradient profile, Dmpd achieves its patterning role through regulating the activating potency of Bcd.
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