Cited by 57Prostate Cancer Treatment and ResearchEstrogen and related hormone effectsChromatin Remodeling and Cancer

Coregulator control of androgen receptor action by a novel nuclear receptor-binding motif

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Jehle, Katja, Cato, Laura, Neeb, Antje, Muhle-Goll, Claudia, Jung, Nicole, Smith, Emmanuel W., Buzon, Victor, Carbó, Laia R. +9 more·2014·Journal of Biological Chemistry

Abstract

The androgen receptor (AR) is a ligand-activated transcription factor that is essential for prostate cancer development. It is activated by androgens through its ligand-binding domain (LBD), which consists predominantly of 11 α-helices. Upon ligand binding, the last helix is reorganized to an agonist conformation termed activator function-2 (AF-2) for coactivator binding. Several coactivators bind to the AF-2 pocket through conserved LXXLL or FXXLF sequences to enhance the activity of the receptor. Recently, a small compound-binding surface adjacent to AF-2 has been identified as an allosteric modulator of the AF-2 activity and is termed binding function-3 (BF-3). However, the role of BF-3 in vivo is currently unknown, and little is understood about what proteins can bind to it. Here we demonstrate that a duplicated GARRPR motif at the N terminus of the cochaperone Bag-1L functions through the BF-3 pocket. These findings are supported by the fact that a selective BF-3 inhibitor or mutations within the BF-3 pocket abolish the interaction between the GARRPR motif(s) and the BF-3. Conversely, amino acid exchanges in the two GARRPR motifs of Bag-1L can impair the interaction between Bag-1L and AR without altering the ability of Bag-1L to bind to chromatin. Furthermore, the mutant Bag-1L increases androgen-dependent activation of a subset of AR targets in a genome-wide transcriptome analysis, demonstrating a repressive function of the GARRPR/BF-3 interaction. We have therefore identified GARRPR as a novel BF-3 regulatory sequence important for fine-tuning the activity of the AR.

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Authors
Jehle, K., Cato, L., Neeb, A., Muhle-Goll, C., Jung, N., Smith, E. W., Buzon, V., Carbó, L. R., Estébanez-Perpiñá, E., Schmitz, K., Fruk, L., Luy, B., Chen, Y., Cox, M. B., Bräse, S., Brown, M., & Cato, A. C. B.
Affiliations
  • Karlsruhe Institute of Technology (DE)
  • Harvard University (US)
  • University of South Florida (US)
  • Institut de Biomedicina de la Universitat de Barcelona (ES)
  • Technische Universität Darmstadt (DE)
  • The University of Texas at El Paso (US)
Corresponding author
Cato, Andrew C.B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-03
Volume
289
Issue
13
Pages
8839-8851
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2093418017
Cited by
53
References
75
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 7 · 2021: 4 · 2019: 7 · 2018: 4 · 2017: 4 · 2016: 8 · 2015: 7 · 2014: 4
FWCI
6.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) (acceptedVersion)
  • scholarworks - UTEP (The University of Texas at El Paso) (submittedVersion)
  • RECERCAT (Consorci de Serveis Universitaris de Catalunya) (submittedVersion, public-domain)
  • TUbilio (Technical University of Darmstadt) (submittedVersion)
  • RECERCAT (Consorci de Serveis Universitaris de Catalunya) (submittedVersion)
Funders
National Institutes of Health (5 G12 RR008124, 8 G12 MD007592, 1P01CA163227–01A1, P50CA090381)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
androgen receptor, ligand-binding domain, coactivator binding, transcriptional co-regulation, allosteric modulation, prostate cancer, chromatin binding, transcriptional repression
MeSH terms
Allosteric Regulation, Amino Acid Sequence, Cell Line, DNA-Binding Proteins, Humans, Mutation, Oligopeptides, Protein Binding, Receptors, Androgen, Transcription Factors, Transcriptional Activation, Protein Structure, Tertiary, Repetitive Sequences, Amino Acid, Amino Acid Motifs

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