Cited by 190Heat shock proteins researchSignaling Pathways in DiseaseEstrogen and related hormone effects

Analysis of FKBP51/FKBP52 Chimeras and Mutants for Hsp90 Binding and Association with Progesterone Receptor Complexes

Open access
Barent, Richard L., Nair, Satish C., Carr, Damon C., Ruan, Ying, Rimerman, Ronald A., Fulton, Jennifer, Zhang, Yan, Smith, David F.·1998·Molecular Endocrinology

Abstract

FKBP51, FKBP52, and Cyp40 bind competitively to Hsp90 through their respective tetratricopeptide repeat (TPR) domains, and any one of the three immunophilins can be isolated in mature steroid receptor complexes. During cell-free assembly reactions, FKBP51 associates preferentially with progesterone and glucocorticoid receptors, but less preference is observed in FKBP51 association with estrogen receptor. A number of mutant FKBP forms were generated to map sequences responsible for FKBP51's preferred association with progesterone receptor. A double-point mutation in the peptidyl prolyl isomerase domain of FKBP51 that reduces enzymatic activity by greater than 90% had no observed effect on FKBP51 interactions with progesterone receptor or Hsp90. Coprecipitation of FKBP51 and FKBP52 truncation mutants with Hsp90 indicated that sequences both upstream and downstream of the TPR domain are necessary for Hsp90 binding. FKBP chimeric constructs were also generated and tested for Hsp90 binding and receptor association. The TPR domain of FKBP51 required appropriate downstream sequences for Hsp90 binding, but FKBP52's TPR domain did not. The C-terminal region of FKBP51 that functionally interacts with the TPR domain to permit Hsp90 binding also conferred preferential association with PR. In conclusion, despite the overall similarity of FKBP51 and FKBP52, these two immunophilins associate differentially with steroid receptors, and the difference relates to both the Hsp90-binding TPR domain and to poorly conserved C-terminal sequences.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1210/mend.12.3.0075

Cites

0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The M1 mutant form of FKBP51 has two amino acid changes in the FK1 domain that reduce prolyl isomerase activity.

    “The M1 mutant form characterized by Smith and coworkers (2) has two amino acid changes in the FK1 domain that reduce prolyl isomerase activity.”
  • In a reticulocyte lysate assembly system, PR complexes showed a preference for FKBP51, GR complexes preferred FKBP51 and PP5, and ER complexes preferred Cyp40.

    “In a reticulocyte lysate assembly system, PR complexes showed a preference for FKBP51, GR complexes preferred FKBP51 and Protein Phosphatase 5 (PP5), and ER complexes preferred Cyclophilin 40 (Cyp40) [13].”

    From FKBP51 and FKBP52 in signaling and disease (2011) · cites this paper as [13]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Chen S, Sullivan WP, Toft DO, Smith DF 1998 Differential interactions of p23 and the TPR-containing proteins Hop, Cyp40, FKBP52 and FKBP51 with Hsp90 mutants. Cell Stress Chap, in press

Cited by

Sorted by citations

Authors
Barent, R. L., Nair, S. C., Carr, D. C., Ruan, Y., Rimerman, R. A., Fulton, J., Zhang, Y., & Smith, D. F.
Affiliations
University of Nebraska Medical Center (US)
Corresponding author
Smith, David F.
Venue
Molecular Endocrinology
Published
1998-03
Volume
12
Issue
3
Pages
342-354
ISSN
  • 0888-8809 (ISSN-L)
  • 1944-9917
OpenAlex
W2094984646
Cited by
190
References
0
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 6 · 2021: 5 · 2020: 4 · 2019: 8 · 2018: 4 · 2017: 3 · 2016: 2 · 2015: 8 · 2014: 11 · 2013: 10 · 2012: 6
FWCI
3.73
Type
journal article
Language
en
Open access
Locations
  • Molecular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • U.S. Public Health Service (R01-48218)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
FKBP51, FKBP52, immunophilins, HSP90, tetratricopeptide repeat domain, progesterone receptor, steroid-receptor complex, peptidyl-prolyl isomerase, glucocorticoid receptor, estrogen receptor, chimeric constructs, mutant analysis, C-terminal interaction, steroid receptor coactivators
MeSH terms
Amino Acid Sequence, Binding Sites, Carrier Proteins, DNA-Binding Proteins, Heat-Shock Proteins, Molecular Sequence Data, Mutation, Receptors, Progesterone, Recombinant Proteins, HSP90 Heat-Shock Proteins, Peptidylprolyl Isomerase, Tacrolimus Binding Proteins

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review