Structure-Guided Approach to Relieving Transcriptional Repression in Resistance to Thyroid Hormone α
Open Access
- 6 December 2021
- journal article
- research article
- Published by Taylor & Francis Ltd in Molecular and Cellular Biology
- Vol. 42 (2), e0036321
- https://doi.org/10.1128/mcb.00363-21
Abstract
Mutations in thyroid hormone receptor α (TRα), a ligand-inducible transcription factor, cause Resistance to Thyroid Hormone α (RTHα). This disorder is characterised by tissue-specific hormone refractoriness and hypothyroidism, due to inhibition of target gene expression by mutant TRα-corepressor complexes. Using biophysical approaches, we show that RTHα-associated TRα mutants devoid of ligand-dependent transcription activation function, unexpectedly retain the ability to bind thyroid hormone. Visualisation of ligand (T3) within the crystal structure of a prototypic TRα mutant, validates this notion. This finding prompted synthesis of different thyroid hormone analogues, identifying a lead compound (ES08) which dissociates corepressor from mutant human TRα more efficaciously than T3. ES08 rescues developmental anomalies in a zebrafish model of RTHα and induces target gene expression in TRα mutation-containing cells from an RTHα patient, more effectively than T3. Our observations provide proof-of-principle for developing synthetic ligands that can relieve transcriptional repression by the mutant TRα-corepressor complex, for treatment of RTHα.Keywords
This publication has 35 references indexed in Scilit:
- Nuclear receptor corepressor (NCOR1) regulates in vivo actions of a mutated thyroid hormone receptor αProceedings of the National Academy of Sciences of the United States of America, 2013
- Clinical Phenotype and Mutant TRα1The New England Journal of Medicine, 2012
- Alternative mRNA Splicing of Corepressors Generates Variants That Play Opposing Roles in Adipocyte DifferentiationOnline Journal of Public Health Informatics, 2011
- Roll: a new algorithm for the detection of protein pockets and cavities with a rolling probe sphereBioinformatics, 2009
- Identification of a Thyroid Hormone Response Element in the Mouse Krüppel-Like Factor 9 Gene to Explain Its Postnatal Expression in the BrainEndocrinology, 2009
- Syndromes of reduced sensitivity to thyroid hormone: genetic defects in hormone receptors, cell transporters and deiodinationBest Practice & Research Clinical Endocrinology & Metabolism, 2007
- Mechanism of the nuclear receptor molecular switchTrends in Biochemical Sciences, 2004
- Molecular determinants of nuclear receptor-corepressor interactionJournal of Bone and Joint Surgery, 1999
- Gene regulation by thyroid hormone receptorsCurrent Opinion in Endocrinology, Diabetes and Obesity, 1996
- Ligand-independent repression by the thyroid hormone receptor mediated by a nuclear receptor co-repressorNature, 1995