Title
A Derived Allosteric Switch Underlies the Evolution of Conditional Cooperativity between HOXA11 and FOXO1
Author
Mauris C. Nnamani, Soumya Ganguly, Eric M. Erkenbrack, Vincent J. Lynch, Laura S. Mizoue, Yingchun Tong, Heather L. Darling, Monika Fuxreiter, Jens Meiler, Günter P. Wagner
Year
2016
Journal
Cell Reports
Abstract
Transcription factors (TFs) play multiple roles in development. Given this multifunctionality, it has been assumed that TFs are evolutionarily highly constrained. Here, we investigate the molecular mechanisms for the origin of a derived functional interaction between two TFs, HOXA11 and FOXO1. We have previously shown that the regulatory role of HOXA11 in mammalian endometrial stromal cells requires interaction with FOXO1, and that the physical interaction between these proteins evolved before their functional cooperativity. Here, we demonstrate that the derived functional cooperativity between HOXA11 and FOXO1 is due to derived allosteric regulation of HOXA11 by FOXO1. This study shows that TF function can evolve through changes affecting the functional output of a pre-existing protein complex.
Instrument
J-810
Keywords
Circular dichroism, Secondary structure, Medicinal, Biochemistry