Inhibition of the nuclear import of cubitus interruptus by roadkill in the presence of strong hedgehog signal

Hedgehog (Hh) signalling plays an important role in various developmental processes by activating the Cubitus interruptus (Ci)/Glioblastoma (Gli) family of transcription factors. In the process of proper pattern formation, Ci activity is regulated by multiple mechanisms, including processing, traffi...

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Veröffentlicht in:PloS one 2010-12, Vol.5 (12), p.e15365-e15365
Hauptverfasser: Seong, Ki-Hyeon, Akimaru, Hiroshi, Dai, Ping, Nomura, Teruaki, Okada, Masahiro, Ishii, Shunsuke
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container_issue 12
container_start_page e15365
container_title PloS one
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creator Seong, Ki-Hyeon
Akimaru, Hiroshi
Dai, Ping
Nomura, Teruaki
Okada, Masahiro
Ishii, Shunsuke
description Hedgehog (Hh) signalling plays an important role in various developmental processes by activating the Cubitus interruptus (Ci)/Glioblastoma (Gli) family of transcription factors. In the process of proper pattern formation, Ci activity is regulated by multiple mechanisms, including processing, trafficking, and degradation. However, it remains elusive how Ci distinctly recognizes the strong and moderate Hh signals. Roadkill (Rdx) induces Ci degradation in the anterior region of the Drosophila wing disc. Here, we report that Rdx inhibited Ci activity by two different mechanisms. In the region abutting the anterior/posterior boundary, which receives strong Hh signal, Rdx inhibited the nuclear import of Ci by releasing importin α3 from Ci. In this region, Rdx negatively regulated the expression of transcription factor Knot/Collier. In farther anterior regions receiving moderate levels of Hh signal, Rdx induced Ci degradation, as reported previously. Thus, two different mechanisms by which Rdx negatively regulates Ci may play an important role in the fine-tuning of Hh responses.
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subjects Active Transport, Cell Nucleus
Animals
Biology
Crosses, Genetic
Degradation
DNA-Binding Proteins - metabolism
Drosophila
Drosophila melanogaster
Drosophila Proteins - metabolism
Gene expression
Genetics
Genotype
Glioblastoma
Hedgehog protein
Hedgehog Proteins - metabolism
Hydrogels
Imports
Insects
Intracellular Signaling Peptides and Proteins - metabolism
Kinases
Laboratories
Models, Genetic
Mutation
Nuclear transport
Pattern formation
Plasmids - metabolism
Protein Isoforms
Proteins
RDX
Recovery (Medical)
RNA Interference
Signal processing
Signal transduction
Signaling
Transcription factors
Transcription Factors - metabolism
Two-Hybrid System Techniques
title Inhibition of the nuclear import of cubitus interruptus by roadkill in the presence of strong hedgehog signal
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