Cited by 525Prostate Cancer Treatment and ResearchEstrogen and related hormone effectsHormonal and reproductive studies

Domains of the human androgen receptor involved in steroid binding, transcriptional activation, and subcellular localization

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Jenster, Guido, van der Korput, Hetty A. G. M., van Vroonhoven, Cor, van der Kwast, Theo H., Trapman, Jan, Brinkmann, Albert O.·1991·Molecular Endocrinology

Abstract

A series of human androgen receptor (AR) deletion mutants was constructed to study the relationship between the structural domains and their different functions in the AR protein. Human AR mutants were expressed in COS-1 and HeLa cells to investigate hormone binding, transcriptional activation, and subcellular localization. The wild-type human AR (AR 1–910) was expressed as a 110- to 112-kDa doublet, as revealed on immunoblots. All mutant AR proteins also migrated as doublets, except for one. This AR has a deletion from amino acid residues 51–211 and migrated as a single protein band, possibly due to altered posttranslational modification. The AR steroid-binding domain is encoded by approximately 250 amino acid residues in the Cterminal end. Deletions in this domain as well as truncation of the last 12 C-terminal amino acid residues abolished hormone binding. Cotransfection studies in HeLa cells showed that transcriptional activation of an androgen-regulated reporter gene construct was induced by the wildtype human AR. Mutational analysis revealed two regions in the N-terminal part, encoded by amino acid residues 51–211 and 244–360, to be essential for this transcriptional activation. Deletion of the hormone-binding domain yielded a constitutively active AR protein, indicating that in the absence of hormone this domain displays an inhibitory function. In the presence of its ligand, the wild-type AR was located in the cell nucleus. In the absence of androgens the receptor was mainly nuclear, but cytoplasmic localization was observed as well. In contrast, an AR deletion mutant lacking part of the DNAbinding domain and part of the hinge region was exclusively cytoplasmic in the absence of hormone. This mutant AR lacks a region that is highly conserved among steroid receptors and homologous to the simian virus-40 large T-antigen- and nucleoplas-min-nuclear localization signals. Transformation by hormone directed this mutant to the nucleus, indicating the presence of a second, hormone-dependent nuclear targeting mechanism.

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  • AR mutants lacking AF-2 or splicing variants lacking the LBD still have potent transcription activation.

    “AF-2 deletion mutants of AR or AR splicing variants lacking LBD still possess potent transcription activation functions (Guo et al., 2009; Jenster et al., 1995; Jenster et al., 1991; Simental et al., 1991).”

    From Structural Insights of Transcriptionally Active, Full-Length Androgen Receptor Coactivator Complexes (2020) · cites this paper as Jenster et al., 1991

    In “Domains Required for Transcriptional Activation” (page unavailable), the paper reports that an AR mutant lacking the complete steroid-binding domain activated transcription at approximately the level of hormone-bound wild-type AR. It studied engineered deletion mutants, not AR splice variants, and does not specifically identify an AF-2 deletion. Those distinctions are not supported by this source. (LLM, conf=0.88)

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Authors
Jenster, G., van der Korput, H. A. G. M., van Vroonhoven, C., van der Kwast, T. H., Trapman, J., & Brinkmann, A. O.
Affiliations
Erasmus University Rotterdam (NL)
Venue
Molecular Endocrinology
Published
1991-10
Volume
5
Issue
10
Pages
1396-1404
ISSN
  • 0888-8809 (ISSN-L)
  • 1944-9917
OpenAlex
W2002791165
Cited by
523
References
52
Citations by year
2026: 6 · 2025: 9 · 2024: 13 · 2023: 4 · 2022: 8 · 2021: 9 · 2020: 12 · 2019: 11 · 2018: 15 · 2017: 16 · 2016: 18 · 2015: 12 · 2014: 14 · 2013: 17 · 2012: 18
FWCI
25.65
Type
journal article
Language
en
Open access
Locations
  • Molecular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
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
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
androgen receptor, steroid-binding domain, transcriptional activation, subcellular localization, nuclear localization signal, nuclear targeting, hormone binding, constitutively active receptor, deletion mutants, DNA-binding domain, hinge region, post-translational modification
MeSH terms
Animals, Binding Sites, Cell Line, Chromosome Deletion, DNA-Binding Proteins, Genetic Vectors, HeLa Cells, Humans, Immunohistochemistry, Plasmids, Receptors, Androgen, Recombinant Proteins, Transcription, Genetic, Transfection, Restriction Mapping, Chloramphenicol O-Acetyltransferase, Metribolone

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