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Siamois is required for formation of Spemann's organizer

机译:成立Spemann组织者需要Siamois

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摘要

Spemann's organizer develops in response to dorsal determinants that act via maternal components of the wnt pathway. The function of siamois, a wnt-inducible ho- meobox gene, in Spemann's organizer development was ex- amined by fusion of defined transcriptional regulatory do- mains to the siamois homeodomain. Similar to native siamois, a VP16 activator fusion induced axis formation, indicating that siamois functions as a transcriptional activator in axis induction. Fusion of the engrailed repressor generated a dominant inhibitor that blocked axis induction by Xwnt8, β-catenin, and siamois, and repressed wnt activation of the goosecoid promoter.
机译:Spemann的组织者是根据通过wnt途径的母体成分起作用的背侧决定因素而发展的。通过将确定的转录调控域融合到siamois同源结构域中,研究了smomann基因在Spemann组织发育中的作用。类似于天然暹罗,VP16激活剂融合诱导了轴的形成,表明暹罗在轴诱导中起转录激活剂的作用。复杂的阻遏物的融合产生了显性抑制剂,该抑制剂阻滞了Xwnt8,β-catenin和siamois的轴诱导,并抑制了鹅状启动子的wnt激活。

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