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Hedgehog signaling pathway - fly

Hedgehog (Hh) signaling plays essential roles in embryonic development and adult tissue homeostasis. It is first elucidated by genetic studies in Drosophila and the core of the Hh signaling pathway is conserved in evolution. The Hh signaling components include an important complex composed of Cos2, Fu, SuFu and Ci. In the absence of Hh, Ptc inhibits Smo and the complex promotes the formation of the Ci's repressor form CiR. In the presentation of Hh, binding Hh to Ptc relieves Smo repression, which results in Ci's activation and then the increased transcription of Hh target genes in the nucleus.

from KEGG source record: phu04341
Type: pathway
Taxonomic scope
organism-specific biosystem
Pediculus humanus corporis

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