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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-975

Méthot, N; Basler, K (2000). Suppressor of fused opposes hedgehog signal transduction by impeding nuclear accumulation of the activator form of Cubitus interruptus. Development, 127(18):4001-4010.



Hedgehog controls the expression of key developmental genes through the conversion of the transcription factor Cubitus interruptus (Ci) into either an activator (Ci[act]) or a repressor (Ci[rep]) form. Proteolytic cleavage of full-length Ci is important for the generation of Ci[rep], but little is known about how Ci[act] arises in response to Hh. Here we examine Hh signal transduction components for their role in the conversion of full-length Ci into either Ci[act] or Ci[rep]. We report that Cos2, PKA and Fused are necessary for the generation of Ci[rep], whereas the inhibition of either Cos2 or PKA activity is a prerequisite for Ci[act] formation. Fused (Fu) kinase stimulates a constitutively active form of Ci in a Hh-dependent manner, suggesting that Fu enhances the activity rather than the formation of Ci[act]. Su(fu) reduces the nuclear accumulation of the constitutively active form of Ci, arguing that Su(fu) can function subsequent to Ci[act] formation. We propose that Hh induces target gene expression by a two-step mechanism in which Ci[act] is first formed and then accumulates in the nucleus via Fu-induced neutralization of Su(fu) activity.


134 citations in Web of Science®
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Additional indexing

Item Type:Journal Article, refereed
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Date:1 September 2000
Deposited On:11 Feb 2008 12:19
Last Modified:05 Apr 2016 12:16
Publisher:Company of Biologists
PubMed ID:10952898

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