Cited by 358Signaling Pathways in DiseaseHeat shock proteins researchEstrogen and related hormone effects

The Hsp90‐binding peptidylprolyl isomerase FKBP52 potentiates glucocorticoid signaling in vivo

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Riggs, Daniel L., Roberts, Patricia J., Chirillo, Samantha C., Cheung‐Flynn, Joyce, Prapapanich, Viravan, Ratajczak, Thomas, Gaber, Richard, Picard, Didier +1 more·2003·The EMBO Journal

Abstract

Hsp90 is required for the normal activity of steroid receptors, and in steroid receptor complexes it is typically bound to one of the immunophilin-related co-chaperones: the peptidylprolyl isomerases FKBP51, FKBP52 or CyP40, or the protein phosphatase PP5. The physiological roles of the immunophilins in regulating steroid receptor function have not been well defined, and so we examined in vivo the influences of immunophilins on hormone-dependent gene activation in the Saccharomyces cerevisiae model for glucocorticoid receptor (GR) function. FKBP52 selectively potentiates hormone-dependent reporter gene activation by as much as 20-fold at limiting hormone concentrations, and this potentiation is readily blocked by co-expression of the closely related FKBP51. The mechanism for potentiation is an increase in GR hormone-binding affinity that requires both the Hsp90-binding ability and the prolyl isomerase activity of FKBP52.

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Crossref · 10.1093/emboj/cdg108

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  • FKBP52 binding to Hsp90 is required for regulation of AR activity.

    “Previous studies in yeast demonstrated that FKBP52 binding to Hsp90 is required for regulation of AR activity [7].”

    From The FKBP52 Cochaperone Acts in Synergy with β-Catenin to Potentiate Androgen Receptor Signaling (2015) · cites this paper as [7]

    The ‘Selectivity of FKBP52 for GR’ section says FKBP52 did not enhance androgen receptor activity in yeast. The Hsp90-binding requirement reported in ‘Mechanism of FKBP52 action’ applies to potentiation of glucocorticoid receptor (GR) activity, not AR activity. (LLM, conf=0.90)

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  • FKBP52 enhances GR, PR, and AR responsiveness to cognate hormone.

    “In contrast, FKBP52 enhances GR, PR, and AR responsiveness to cognate hormone (28).”

    From FKBP51 Promotes Assembly of the Hsp90 Chaperone Complex and Regulates Androgen Receptor Signaling in Prostate Cancer Cells (2010) · cites this paper as [28]

    The paper supports enhanced GR responsiveness, but its “Selectivity of FKBP52 for GR” section explicitly reports that FKBP52 did not enhance androgen- or progesterone-receptor reporter activity. That contradicts the claim that it enhances AR and PR responsiveness as well. (LLM, conf=0.90)

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  • FKBP52 functionally interacts with AR, GR and PR.

    “While FKBP52 is known to functionally interact with AR, GR and PR [6–8], β-catenin only interacts strongly with AR, but not GR and PR [20].”

    From The FKBP52 Cochaperone Acts in Synergy with β-Catenin to Potentiate Androgen Receptor Signaling (2015) · cites this paper as [7]

    The Discussion reports that FKBP52 boosts GR activity. But “Selectivity of FKBP52 for GR” states that FKBP52 did not enhance androgen- or progesterone-receptor reporter activity in the yeast tests. The paper supports functional interaction with GR, not the claimed functional effects on all three receptors. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • FKBP51 inhibits GR ligand binding, nuclear translocation and transcriptional activity, while FKBP52 potentiates each of these activities.

    “FKBP51 inhibits GR ligand binding, nuclear translocation and transcriptional activity, while FKBP52 potentiates each of these fundamental GR activities22–32.”

    From Cryo-EM reveals how Hsp90 and FKBP immunophilins co-regulate the glucocorticoid receptor (2023) · cites this paper as [23]

    The Discussion reports that FKBP52 raises GR hormone-binding affinity and boosts reporter activity. The section on immunophilin influence says FKBP51 was known to inhibit GR activity in mammalian systems, but this study did not observe that inhibition in yeast; it found that FKBP51 blocked FKBP52-mediated potentiation. The Mechanism section discusses nuclear transport as a proposal from other researchers, not as a demonstrated effect of either protein here, so the claim about nuclear translocation is unsupported by this paper. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Unlike FKBP52, FKBP51 does not enhance GR ligand binding in vitro.

    “unlike FKBP52, FKBP51 does not enhance GR ligand binding in vitro, consistent with in vivo studies23,27,29.”

    From Cryo-EM reveals how Hsp90 and FKBP immunophilins co-regulate the glucocorticoid receptor (2023) · cites this paper as [23]

    The “FKBP52 and GR hormone binding” section reports greater GR hormone binding in yeast cells expressing FKBP52 than in cells expressing FKBP51. The assays used intact cells, however, so this paper does not establish the claim specifically for in vitro ligand binding. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Authors
Riggs, D. L., Roberts, P. J., Chirillo, S. C., Cheung‐Flynn, J., Prapapanich, V., Ratajczak, T., Gaber, R., Picard, D., & Smith, D. F.
Affiliations
  • Mayo Clinic (US)
  • The University of Western Australia (AU)
  • Northwestern University (US)
  • University of Geneva (CH)
Corresponding author
Smith, David F.
Venue
The EMBO Journal
Published
2003-03-03
Volume
22
Issue
5
Pages
1158-1167
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2075431153
Cited by
353
References
58
Citations by year
2026: 7 · 2025: 11 · 2024: 6 · 2023: 19 · 2022: 13 · 2021: 16 · 2020: 13 · 2019: 16 · 2018: 9 · 2017: 14 · 2016: 15 · 2015: 21 · 2014: 16 · 2013: 18 · 2012: 16
FWCI
6.63
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Funders
  • National Science Foundation (0079249)
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK44923, R01DK044923, R01DK048218)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
FKBP52, HSP90, immunophilins, glucocorticoid receptor, glucocorticoid signaling, peptidylprolyl isomerase, FKBP51, hormone binding affinity, Saccharomyces cerevisiae, protein phosphatase 5
MeSH terms
Animals, Dose-Response Relationship, Drug, Gene Expression Regulation, Glucocorticoids, Humans, Models, Molecular, Protein Binding, Protein Conformation, Receptors, Glucocorticoid, Saccharomyces cerevisiae, Signal Transduction, Transcriptional Activation, Genes, Reporter, Molecular Chaperones, HSP90 Heat-Shock Proteins, Peptidylprolyl Isomerase, Tacrolimus Binding Proteins

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