Download MendeleyA metastable contact and structural disorder in the estrogen receptor transactivation domain
Peng Y, Cao S, Kiselar J, Xiao X, Du Z, Hsien A, Ko S, Chen Y, Agrawal P, Zheng W, Shi W, Jiang W, Yang L, Chance MR, Surewicz WK, Buck M, Yang S(2019) Structure 27: 229-240
- PubMed: 30581045
- DOI: https://doi.org/10.1016/j.str.2018.10.026
- Primary Citation Related Structures:
8ZZR - PubMed Abstract:
The N-terminal transactivation domain (NTD) of estrogen receptor alpha, a well-known member of the family of intrinsically disordered proteins, mediates the receptor's transactivation function. However, an accurate molecular dissection of NTD's structure-function relationships remains elusive. Here, we show that the NTD adopts a mostly disordered, unexpectedly compact conformation that undergoes structural expansion on chemical denaturation. By combining small-angle X-ray scattering, hydroxyl radical protein footprinting, and computational modeling, we derive the ensemble-structures of the NTD and determine its ensemble-contact map revealing metastable long-range contacts, e.g., between residues I33 and S118. We show that mutation at S118, a known phosphorylation site, promotes conformational changes and increases coactivator binding. We further demonstrate via fluorine-19 ( 19 F) nuclear magnetic resonance that mutations near I33 alter 19 F chemical shifts at S118, confirming the proposed I33-S118 contact in the ensemble of structural disorder. These findings extend our understanding of how specific contact metastability mediates critical functions of disordered proteins.
- Center for Proteomics and Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA.
Organizational Affiliation:
