Observation of unphosphorylated STAT3 core protein binding to target dsDNA by PEMSA and X-ray crystallography.
Nkansah, E., Shah, R., Collie, G.W., Parkinson, G.N., Palmer, J., Rahman, K.M., Bui, T.T., Drake, A.F., Husby, J., Neidle, S., Zinzalla, G., Thurston, D.E., Wilderspin, A.F.(2013) FEBS Lett 587: 833-839
- PubMed: 23434585 
- DOI: https://doi.org/10.1016/j.febslet.2013.01.065
- Primary Citation of Related Structures:  
4E68 - PubMed Abstract: 
The STAT3 transcription factor plays a central role in a wide range of cancer types where it is over-expressed. Previously, phosphorylation of this protein was thought to be a prerequisite for direct binding to DNA. However, we have now shown complete binding of a purified unphosphorylated STAT3 (uSTAT3) core directly to M67 DNA, the high affinity STAT3 target DNA sequence, by a protein electrophoretic mobility shift assay (PEMSA) ...