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Title: The quaternary architecture of RARβ–RXRα heterodimer facilitates domain–domain signal transmission

Journal Article · · Nature Communications
 [1];  [2];  [3];  [1];  [4];  [1]
  1. Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (United States). Integrative Metabolism Program
  2. Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL (United States). Integrative Metabolism Program; Shandong University (China). Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, School of Life Sciences
  3. University of California, San Diego, La Jolla, CA (United States). Department of Medicine and UCSD DXMS Proteomics Resource
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Structural Biology Center, Biosciences Division

Assessing the physical connections and allosteric communications in multi-domain nuclear receptor (NR) polypeptides has remained challenging, with few crystal structures available to show their overall structural organizations. Here we report the quaternary architecture of multi-domain retinoic acid receptor beta-retinoic X receptor alpha (RAR beta-RXR alpha) heterodimer bound to DNA, ligands and coactivator peptides, examined through crystallographic, hydrogen-deuterium exchange mass spectrometry, mutagenesis and functional studies. The RAR beta ligand-binding domain (LBD) and DNA-binding domain (DBD) are physically connected to foster allosteric signal transmission between them. Direct comparisons among all the multi-domain NRs studied crystallographically to date show significant variations within their quaternary architectures, rather than a common architecture adhering to strict rules. RXR remains flexible and adaptive by maintaining loosely organized domains, while its hetero-dimerization partners use a surface patch on their LBDs to form domain-domain interactions with DBDs.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1422588
Journal Information:
Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Intrinsic Disorder in Nuclear Receptor Amino Termini: From Investigational Challenge to Therapeutic Opportunity journal January 2019
High‐throughput custom capture sequencing identifies novel mutations in coloboma‐associated genes: Mutation in DNA‐binding domain of retinoic acid receptor beta affects nuclear localization causing ocular coloboma journal November 2019
Integrating Thyroid Hormone Signaling in Hypothalamic Control of Metabolism: Crosstalk Between Nuclear Receptors journal July 2018
Ligand induced dissociation of the AR homodimer precedes AR monomer translocation to the nucleus journal November 2019
Recent insights on the role and regulation of retinoic acid signaling during epicardial development journal May 2019
Natural helix 9 mutants of PPARγ differently affect its transcriptional activity journal February 2019
Multidomain architecture of estrogen receptor reveals interfacial cross-talk between its DNA-binding and ligand-binding domains journal August 2018