Functional evolution of the TACC proteins modeled in C. elegans and D. melanogaster. (A). C. elegans interaction map shows empirically defined interactions of ceTAC, and extrapolated interactions defined by [28]. (B): Using the BIND database [29], DTACC directly binds to TBPH and CG14540, and thus indirectly to chromatin remodeling complexes (SWI/SNF and histone acetyltransferases), DNA damage repair machinery (via RAD23), and RNA splicing, transport and translational machinery. (C): Predicted interaction map for vertebrate TACCs, based upon ceTAC, suggests an indirect interaction with the nuclear hormone receptor RXRβ. It is also of interest that this predicts a functional interaction with the LDB family, members of which are also found in TACC containing paralogous segments noted in Figs 2, 3 and Additional file 1. (D): Predicted TACC interaction map based upon DTACC. (E): Vertebrate TACC interactions identified to date. ? denotes uncertainty over the identity of a functional vertebrate homologue. In C, D and E, '*' denotes one or more members of the TACC or Aurora kinase family.