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Papini C, Royer CA. Scanning number and brightness yields absolute protein concentrations in live cells: a crucial parameter controlling functional bio-molecular interaction networks. Biophys Rev 2018; 10:87-96. [PMID: 29383593 DOI: 10.1007/s12551-017-0394-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 12/29/2017] [Indexed: 12/27/2022] Open
Abstract
Biological function results from properly timed bio-molecular interactions that transduce external or internal signals, resulting in any number of cellular fates, including triggering of cell-state transitions (division, differentiation, transformation, apoptosis), metabolic homeostasis and adjustment to changing physical or nutritional environments, amongst many more. These bio-molecular interactions can be modulated by chemical modifications of proteins, nucleic acids, lipids and other small molecules. They can result in bio-molecular transport from one cellular compartment to the other and often trigger specific enzyme activities involved in bio-molecular synthesis, modification or degradation. Clearly, a mechanistic understanding of any given high level biological function requires a quantitative characterization of the principal bio-molecular interactions involved and how these may change dynamically. Such information can be obtained using fluctation analysis, in particular scanning number and brightness, and used to build and test mechanistic models of the functional network to define which characteristics are the most important for its regulation.
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Affiliation(s)
- Christina Papini
- Program in Biochemistry and Biophysics, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA
| | - Catherine A Royer
- Program in Biochemistry and Biophysics, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.
- Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.
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Takeda K, Hara N, Nishiyama T, Tasaki M, Ishizaki F, Tomita Y. Corepressive function of nuclear receptor coactivator 2 in androgen receptor of prostate cancer cells treated with antiandrogen. BMC Cancer 2016; 16:332. [PMID: 27225190 PMCID: PMC4880970 DOI: 10.1186/s12885-016-2378-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 05/23/2016] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Recruitment of cofactors in the interaction of the androgen receptor (AR) and AR ligands plays a critical role in determining androgenic/antiandrogenic effects of the AR ligand on signaling, but the functions of key cofactors, including nuclear receptor coactivator (NCOA), remain poorly understood in prostate cancer cells treated with AR ligands. METHODS We examined prostate cancer cell lines LNCaP and VCaP expressing mutated and wild-type ARs, respectively, to clarify the significance of NCOAs in the effect of antiandrogens. Hydroxyflutamide showed antagonistic activity against VCaP and an agonistic effect on LNCaP. Bicalutamide served as an antagonist for both. We analyzed mRNA transcription and protein expression of NCOAs in these cells pretreated with dihydrotestosterone and thereafter treated with the mentioned antiandrogens. Transcriptional silencing of candidate NCOAs and AR was performed using small interfering RNA (siRNA). Cell proliferation was evaluated with MTT assay. RESULTS LNCaP treated with bicalutamide showed an about four-fold increase in the expression of NCOA2 mRNA compared to those pretreated with dihydrotestosterone alone (P <0.01). In VCaP pretreated with dihydrotestosterone, transcriptions of NCOA2 and NCOA7 were slightly increased with bicalutamide (1.96- and 2.42-fold, respectively) and hydroxyflutamide (1.33-fold in both). With Western blotting, the expression of NCOA2 protein also increased in LNCaP cells treated with bicalutamide compared with that in control cells pretreated with dihydrotestosterone alone. Following silencing with siRNA for NCOA2, PSA levels in media with LNCaP receiving bicalutamide were elevated compared with those in non-silencing controls (101.6 ± 4.2 vs. 87.8 ± 1.4 ng/mL, respectively, P =0.0495). In LNCaP cells treated with dihydrotestosterone and bicalutamide, NCOA2-silencing was associated with a higher proliferation activity compared with non-silencing control and AR-silencing. CONCLUSION NCOA2, which has been thought to be recruited as a coactivator, possibly plays a corepressive role in AR of prostate cancer cells when treated with antiandrogens, suggesting its potential as a therapeutic target.
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Affiliation(s)
- Keisuke Takeda
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Noboru Hara
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan. .,Division of Molecular Oncology, Department of Signal Transduction Research, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan. .,, Asahimachi 1, Niigata, 951-8510, Japan.
| | - Tsutomu Nishiyama
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masayuki Tasaki
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Fumio Ishizaki
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Yoshihiko Tomita
- Division of Urology, Department of Regenerative and Transplant Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
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Savatier J, Jalaguier S, Ferguson ML, Cavaillès V, Royer CA. Estrogen receptor interactions and dynamics monitored in live cells by fluorescence cross-correlation spectroscopy. Biochemistry 2010; 49:772-81. [PMID: 20039662 DOI: 10.1021/bi9013006] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Quantitative characterization of protein interactions in live cells remains one of the most important challenges in modern biology. In the present work we have used two-photon, two-color, fluorescence cross-correlation spectroscopy (FCCS) in transiently transfected COS-7 cells to measure the concentrations and interactions of estrogen receptor (ER) subtypes alpha and beta with one of their transcriptional coactivator proteins, TIF2, as well as heterodimerization between the two ER subtypes. Using this approach in a systematic fashion, we observed a strong ligand-dependent modulation of receptor-coactivator complexation, as well as strong protein concentration dependence for complex formation in the absence of ligand. These quantitative values for protein and complex concentrations provide the first estimates for the ER-TIF2 K(d) for the full-length proteins and in a cellular context (agonist, < approximately 6 nM; antagonist, > approximately 3 microM; unliganded, approximately 200 nM). Coexpression of the two ER subtypes revealed substantial receptor heterodimer formation. They also provide, for the first time, estimated homo- and heterodimerization constants found to be similar and in the low nanomolar range. These results underscore the importance of receptor and coregulator expression levels and stability in the tissue-dependent modulation of receptor function under normal and pathological conditions.
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Affiliation(s)
- Julien Savatier
- Centre de Biochimie Structurale, INSERM U554, and CNRS UMR5048, Université Montpellier 1 and 2, Montpellier F-34090, France
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Hink MA, Shah K, Russinova E, de Vries SC, Visser AJ. Fluorescence fluctuation analysis of Arabidopsis thaliana somatic embryogenesis receptor-like kinase and brassinosteroid insensitive 1 receptor oligomerization. Biophys J 2008; 94:1052-62. [PMID: 17905839 PMCID: PMC2186235 DOI: 10.1529/biophysj.107.112003] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2007] [Accepted: 08/31/2007] [Indexed: 11/18/2022] Open
Abstract
Receptor kinases play a key role in the cellular perception of signals. To verify models for receptor activation through dimerization, an experimental system is required to determine the precise oligomerization status of proteins within living cells. Here we show that photon counting histogram analysis and dual-color fluorescence cross correlation spectroscopy are able to monitor fluorescently labeled proteins at the single-molecule detection level in living plant cells. In-frame fusion proteins of the brassinosteroid insensitive 1 (BRI1) receptor and the Arabidopsis thaliana somatic embryogenesis receptor-like kinases 1 and 3 (AtSERK1 and 3) to the enhanced cyan or yellow fluorescent protein were transiently expressed in plant cells. Although no oligomeric structures were detected for AtSERK3, 15% (AtSERK1) to 20% (BRI1) of the labeled proteins in the plasma membrane was found to be present as homodimers, whereas no evidence was found for higher oligomeric complexes.
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Affiliation(s)
- Mark A. Hink
- MicroSpectroscopy Centre, Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Khalid Shah
- MicroSpectroscopy Centre, Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Eugenia Russinova
- MicroSpectroscopy Centre, Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Sacco C. de Vries
- MicroSpectroscopy Centre, Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Antonie J.W.G. Visser
- MicroSpectroscopy Centre, Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
- Department of Structural Biology, Faculty of Earth and Life Sciences, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
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Zorrilla S, Chaix D, Ortega A, Alfonso C, Doan T, Margeat E, Rivas G, Aymerich S, Declerck N, Royer CA. Fructose-1,6-bisphosphate Acts Both as an Inducer and as a Structural Cofactor of the Central Glycolytic Genes Repressor (CggR). Biochemistry 2007; 46:14996-5008. [DOI: 10.1021/bi701805e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Silvia Zorrilla
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Denis Chaix
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Alvaro Ortega
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Carlos Alfonso
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Thierry Doan
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Emmanuel Margeat
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Germán Rivas
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Stephan Aymerich
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Nathalie Declerck
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Catherine A. Royer
- INSERM (U554), Montpellier, France, and Centre de Biochimie Structurale, CNRS (UMR5048), Université Montpellier 1, 29, rue de Navacelles, F-34090 Montpellier, France, Microbiologie et Génétique Moléculaire, INRA (UMR1238) and CNRS (UMR2585), Institut National Agronomique Paris-Grignon, F-78850 Thiverval-Grignon, France, and Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
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