Negative regulation of Endothelin signaling by SIX1 is required for proper maxillary development

Negative regulation of endothelin signaling by SIX1 is required for proper maxillary development.

Jaw morphogenesis is a complex event mediated by inductive signals that establish and maintain the distinct developmental domains required for formation of hinged jaws, the defining feature of gnathostomes. The mandibular portion of pharyngeal arch 1 is patterned dorsally by Jagged-Notch signaling and ventrally by endothelin receptor A (EDNRA) signaling. Loss of EDNRA signaling disrupts normal ...

Negative regulation of Smad2 by PIASy is required for proper Xenopus mesoderm formation.

Mesoderm induction and patterning are primarily regulated by the concentration of locally expressed morphogens such as members of the TGFbetasuperfamily. Smad2 functions as a transcription factor to regulate expression of mesodermal genes downstream of such morphogens. We have identified Xenopus PIASy (XPIASy), a member of the PIAS family, by yeast two-hybrid screening using Xenopus Smad2 (XSma...

Rho1 regulates signaling events required for proper Drosophila embryonic development.

The Rho small GTPase has been implicated in many cellular processes, including actin cytoskeletal regulation and transcriptional activation. The molecular mechanisms underlying Rho function in many of these processes are not yet clear. Here we report that in Drosophila, reduction of maternal Rho1 compromises signaling pathways consistent with defects in membrane trafficking events. These mutant...

Internalization is required for proper Wingless signaling in Drosophila melanogaster

The Wnt-Wingless (Wg) pathway regulates development through precisely controlled signaling. In this study, we show that intracellular trafficking regulates Wg signaling levels. In Drosophila melanogaster cells stimulated with Wg media, dynamin or Rab5 knockdown causes reduced Super8XTOPflash activity, suggesting that internalization and endosomal transport facilitate Wg signaling. In the wing, ...

Required for Proper Thymocyte Maturation Remodeling Activity by TCR Signaling Is Down-Regulation of the SWI/SNF Chromatin