From vestigial to vestigial-like: the Drosophila gene that has taken wing.

The members of the vestigial-like gene family have been identified as homologs of the Drosophila vestigial, which is essential to wing formation. All members of the family are characterized by the presence of the TONDU domain, a highly conserved sequence that mediates their interaction with the transcription factors of the TEAD family. Mammals possess four vestigial-like genes that can be subdivided into two classes, depending on the number of Tondu domains present. While vestigial proteins have been studied in great depth in Drosophila, we still have sketchy knowledge of the functions of vestigial-like proteins in vertebrates. Recent studies have unveiled unexpected functions for some of these members and reveal the role they play in the Hippo pathway. Here, we present the current knowledge about vestigial-like family gene members and their functions, together with their identification in different taxa.

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