Abstract
The eight twenty-one protein, ETO, is implicated in 12%–15% of acute human leukemias as part of a gene fusion with RUNX1 (also called AML1). Of the four ETO domains related to Drosophila melanogaster Nervy, only two are required to induce spontaneous myeloid leukemia upon transplantation into the mouse. One of these domains is related in sequence to TAF4, a component of TFIID. The structure of this domain, ETO-TAFH, is similar to yeast Rpb4 and to Escherichia coli σ70; it is the first TAF-related protein with structural similarity to the multisubunit RNA polymerases. Overlapping surfaces of ETO-TAFH interact with an autonomous repression domain of the nuclear receptor corepressor N-CoR and with a conserved activation domain from the E-box family of transcription factors. Thus, ETO-TAFH acts as a structural platform that can interchange negative and positive coregulatory proteins to control transcription.
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Acknowledgements
This work was supported in part by a fellowship from the Deutsche Forschungsgemeinschaft (LA 1389/1-1 to J.L.), by the Specialized Center of Research Grant from the Leukemia and Lymphoma Society (to M.H.W.) and by the RIKEN Structural Genomics/Proteomics Initiative, the National Project on Protein Structural and Functional Analyses, Ministry of Education, Culture, Sports, Science and Technology of Japan. M.H.W. is a Distinguished Young Scholar of the W.M. Keck Foundation. We thank S. Hiebert (Vanderbilt University), N. Timchenko (Baylor College of Medicine), E.P. Reddy (Temple University), M.J. Klemsz (Indiana University) and S. Nimer (Memorial Sloan-Kettering Cancer Center) for providing expression and reporter vectors, T. Berg and M. Lübbert (University of Freiberg) for sharing AML1-ETO microarray data before publication and M. Punta and B. Rost for sequence analysis of the N-CoR– and E-protein–binding motifs.
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Y.W., S.C. and M.H.W. performed the majority of the NMR chemical shift analyses and structure calculations. Protein preparation work was carried out by C.W., Y.W. and M.H.W. S.L. and J.L. performed all of the biological assays. N.B. contributed to the NMR data analysis and computed the ETO-TAFH complex models. N.K. and S.Y. developed the KUJIRA NMR analysis toolkit.
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Supplementary information
Supplementary Fig. 1
Comparison of 2H7B and ETO-TAFH structures and their per-residue solvent accessibilities. (PDF 414 kb)
Supplementary Fig. 2
Quality assessment for structures of ETO-TAFH. (PDF 1106 kb)
Supplementary Fig. 3
1H-15N HSQC spectra of ETO-TAFH and ETO-TAFH F136Y. (PDF 683 kb)
Supplementary Fig. 4
HADDOCK modeling of the 2H7B complex with a peptide from HEB-AD1. (PDF 516 kb)
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Wei, Y., Liu, S., Lausen, J. et al. A TAF4-homology domain from the corepressor ETO is a docking platform for positive and negative regulators of transcription. Nat Struct Mol Biol 14, 653–661 (2007). https://doi.org/10.1038/nsmb1258
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DOI: https://doi.org/10.1038/nsmb1258
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