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  • Title: Null mutations in Drosophila Optomotor-blind affect T-domain residues conserved in all Tbx proteins.
    Author: Sen A, Gadomski C, Balles J, Abassi Y, Dorner C, Pflugfelder GO.
    Journal: Mol Genet Genomics; 2010 Feb; 283(2):147-56. PubMed ID: 20033428.
    Abstract:
    The T-box transcription factors TBX2 and TBX3 are overexpressed in many human cancers raising the need for a thorough understanding of the cellular function of these proteins. In Drosophila, there is one corresponding ortholog, Optomotor-blind (Omb). Currently, only two missense mutations are known for the two human proteins. Making use of the developmental defects caused by inactivation of omb, we have isolated and molecularly characterized four new omb mutations, three of them are missense mutations of amino acids fully conserved in all Tbx proteins. We interpret the functional defects in the framework of the known structure of the human TBX3 protein and provide evidence for loss of Omb DNA-binding activity in all three newly identified missense mutations.
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