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Nishio T, Masaoka T, Yoshikawa Y, Sadakane K, Kenmotsu T, Schiessel H, Yoshikawa K. Markedly Different Effects of Monovalent Cations on the Efficiency of Gene Expression. Adv Biol (Weinh) 2023; 7:e2200164. [PMID: 36328593 DOI: 10.1002/adbi.202200164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/20/2022] [Indexed: 11/06/2022]
Abstract
The effect of monovalent cations on a cell-free transcription-translation (TX-TL) system is examined using a luciferase assay. It is found that the potency for all ions analyzed here is in the order Rb+ > K+ > Cs+ > Na+ ≈ Li+ > (CH3 )4 N+ , where Rb+ is most efficient at promoting TX-TL and the ions of Li+ , Na+ , and (CH3 )4 N+ exhibit an inhibitory effect. Similar promotion/inhibition effects are observed for cell-free TL alone with an mRNA template.
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Affiliation(s)
- Takashi Nishio
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
- Cluster of Excellence Physics of Life, Technical University of Dresden, 01307, Dresden, Germany
| | - Tomoya Masaoka
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
| | - Yuko Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
| | - Koichiro Sadakane
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
| | - Takahiro Kenmotsu
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
| | - Helmut Schiessel
- Cluster of Excellence Physics of Life, Technical University of Dresden, 01307, Dresden, Germany
| | - Kenichi Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
- Center for Integrative Medicine and Physics Institute for Advanced Study, Kyoto University, Kyoto, 606-8501, Japan
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Abstract
Metal ions are essential cofactors for the structure and functions of nucleic acids. Yet, the early discovery in the 70s of the crucial role of Mg(2+) in stabilizing tRNA structures has occulted for a long time the importance of monovalent cations. Renewed interest in these ions was brought in the late 90s by the discovery of specific potassium metal ions in the core of a group I intron. Their importance in nucleic acid folding and catalytic activity is now well established. However, detection of K(+) and Na(+) ions is notoriously problematic and the question about their specificity is recurrent. Here we review the different methods that can be used to detect K(+) and Na(+) ions in nucleic acid structures such as X-ray crystallography, nuclear magnetic resonance or molecular dynamics simulations. We also discuss specific versus non-specific binding to different structures through various examples.
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Affiliation(s)
- Pascal Auffinger
- Architecture et Réactivité de l'ARN, Université de Strasbourg, IBMC, CNRS, 15 rue René Descartes, F-67084, Strasbourg, France.
| | - Luigi D'Ascenzo
- Architecture et Réactivité de l'ARN, Université de Strasbourg, IBMC, CNRS, 15 rue René Descartes, F-67084, Strasbourg, France.
| | - Eric Ennifar
- Architecture et Réactivité de l'ARN, Université de Strasbourg, IBMC, CNRS, 15 rue René Descartes, F-67084, Strasbourg, France.
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Ramírez A, Hinojosa LM, Gonzales JDJ, Montante-Montes D, Martínez-Benítez B, Aguilar-Guadarrama R, Gamboa-Domínguez A, Morales F, Carrillo-García A, Lizano M, García-Becerra R, Díaz L, Vázquez-Sánchez AY, Camacho J. KCNH1 potassium channels are expressed in cervical cytologies from pregnant patients and are regulated by progesterone. Reproduction 2013; 146:615-23. [DOI: 10.1530/rep-13-0318] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Potassium voltage-gated channel, subfamily H (eag-related), member 1 (KCNH1) potassium channels are potential tumour markers and cancer therapeutic targets and are up-regulated by oestrogens and human papilloma virus (HPV) oncogenes. However, the role of KCNH1 in normal tissues is poorly understood, and its expression in pregnancy is unknown. We wondered whether KCNH1 channels are expressed in cervical cells from pregnant patients and whether progesterone (P4) regulates KCNH1. The association with HPV was also investigated. KCNH1 protein expression was studied by immunocytochemistry in liquid-based cervical cytologies; 93 samples were obtained from pregnant patients at different trimesters, and 15 samples were obtained from non-pregnant women (controls). The presence ofHPVwas studied by PCR with direct sequencing and nested multiplex PCR. HeLa cervical cancer cells were transfected with human progesterone receptor-B (PR-B) and treated with P4.KCNH1mRNA expression in these cultures was studied by real-time PCR. KCNH1 protein was detected in 100% of the pregnancy samples and in 26% of the controls. We found 18 pregnant patients infected with HPV and detected 14 types ofHPV. There was no association between the percentage of cells expressing KCNH1 and either the presence or type of HPV. P4induced KCNH1 mRNA and protein expression in cells transfected with human PR-B. No regulation of KCNH1 by P4was observed in non-transfected cells. We show for the first time the expression of an ion channel during human pregnancy at different trimesters and KCNH1 regulation by P4in human cells. These data raise a new research field for KCNH1 channels in human tissues.
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Cochrane DR, Jacobsen BM, Connaghan KD, Howe EN, Bain DL, Richer JK. Progestin regulated miRNAs that mediate progesterone receptor action in breast cancer. Mol Cell Endocrinol 2012; 355:15-24. [PMID: 22330642 PMCID: PMC4716679 DOI: 10.1016/j.mce.2011.12.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 11/23/2011] [Accepted: 12/29/2011] [Indexed: 01/01/2023]
Abstract
Progesterone receptors (PRs) mediate response to progestins in the normal breast and breast cancer. To determine if liganded PR regulate microRNAs (miRNAs) as a component of their action, we profiled mature miRNA levels following progestin treatment. Indeed, 28 miRNAs are significantly altered by 6h of progestin treatment. Many progestin-responsive genes are putative targets of progestin-regulated miRNAs; for example, progestin treatment decreases miR-29, thereby relieving repression of one of its direct targets, the gene encoding ATPase, Na(+)/K(+) transporting, beta 1 polypeptide (ATP1B1). Thus, liganded PR regulates ATP1B1 through sites in the promoter and the 3'UTR, to achieve maximal tight hormonal regulation of ATP1B1 protein via both transcriptional and translational control. We find that ATP1B1 serves to limit migration and invasion in breast cancer cells. Lastly, we demonstrate that PR itself is regulated by a progestin-upregulated miRNA, miR-513a-5p, providing a novel mechanism for tight control of PR protein expression.
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Affiliation(s)
- Dawn R. Cochrane
- Department of Pathology, University of Colorado Denver Anschutz Medical Campus, Denver, USA
| | - Britta M. Jacobsen
- Department of Medicine, University of Colorado Denver Anschutz Medical Campus, Denver, USA
| | - Keith D. Connaghan
- Department of Pharmaceutical Sciences, University of Colorado Denver Anschutz Medical Campus, Denver, USA
| | - Erin N. Howe
- Department of Pathology, University of Colorado Denver Anschutz Medical Campus, Denver, USA
| | - David L. Bain
- Department of Pharmaceutical Sciences, University of Colorado Denver Anschutz Medical Campus, Denver, USA
| | - Jennifer K. Richer
- Department of Pathology, University of Colorado Denver Anschutz Medical Campus, Denver, USA
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Moody AD, Miura MT, Connaghan KD, Bain DL. Thermodynamic dissection of estrogen receptor-promoter interactions reveals that steroid receptors differentially partition their self-association and promoter binding energetics. Biochemistry 2012; 51:739-49. [PMID: 22201220 DOI: 10.1021/bi2017156] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Steroid receptors define a family of ligand-activated transcription factors. Recent work has demonstrated that the receptors regulate distinct but overlapping gene networks, yet the mechanisms by which they do so remain unclear. We previously determined the microscopic binding energetics for progesterone receptor (PR) isoform assembly at promoters containing multiple response elements. We found that the two isoforms (PR-A and PR-B) share nearly identical dimerization and intrinsic DNA binding free energies but maintain large differences in cooperative free energy. Moreover, cooperativity can be modulated by monovalent ion binding and promoter layout, suggesting that differences in cooperativity might control isoform-specific promoter occupancy and thus receptor function. To determine whether cooperative binding energetics are common to other members of the steroid receptor family, we dissected the thermodynamics of estrogen receptor-α (ER-α):promoter interactions. We find that the ER-α intrinsic DNA binding free energy is identical to that of the PR isoforms. This was expected, noting that receptor DNA binding domains are highly conserved. Unexpectedly, ER-α generates negligible cooperativity-orders of magnitude less than predicted based on our studies of the PR isoforms. However, analysis of the cooperativity term suggests that it reflects a balance between highly favorable cooperative stabilization and unfavorable promoter bending. Moreover, ER-α cooperative free energy is compensated for by a large increase in dimerization free energy. Collectively, the results demonstrate that steroid receptors differentially partition not only cooperative energetics but also dimerization energetics. We speculate that this ability serves as a framework for regulating receptor-specific promoter occupancy and thus receptor-specific gene regulation.
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Affiliation(s)
- Amie D Moody
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, United States
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Moody AD, Robblee JP, Bain DL. Dissecting the linkage between transcription factor self-assembly and site-specific DNA binding: the role of the analytical ultracentrifuge. Methods Mol Biol 2012; 796:187-204. [PMID: 22052491 DOI: 10.1007/978-1-61779-334-9_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A long-standing goal of biomedical research has been to determine the quantitative mechanisms responsible for gene regulation and transcriptional activation. These events occur through numerous protein-protein and protein-DNA interactions, many of which are allosterically coupled. For systems where highly purified protein is available, analytical ultracentrifugation provides a means to study these linked reactions, allosteric or otherwise. Sedimentation velocity is an ultracentrifugation technique that provides rigorous insight into protein self-association, homogeneity, and gross structure. Because self-association is often in dynamic equilibrium with other reactions such as DNA binding, an explicit and independent analysis of each interaction is critical to revealing mechanism. This chapter details a protocol for using sedimentation velocity to dissect the linkage between transcription factor self-association and site-specific DNA binding.
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Affiliation(s)
- Amie D Moody
- Department of Pharmaceutical Sciences, University of Colorado, Aurora, CO, USA
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Connaghan KD, Moody AD, Robblee JP, Lambert JR, Bain DL. From steroid receptors to cytokines: the thermodynamics of self-associating systems. Biophys Chem 2011; 159:24-32. [PMID: 21696881 DOI: 10.1016/j.bpc.2011.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 04/19/2011] [Accepted: 04/19/2011] [Indexed: 11/17/2022]
Abstract
Since 1987, the Gibbs Conference on Biothermodynamics has maintained a focus on understanding the quantitative aspects of gene regulatory systems. These studies coupled rigorous techniques with exact theory to dissect the linked reactions associated with bacterial and lower eukaryotic gene regulation. However, only in the last ten years has it become possible to apply this approach to clinically relevant, human gene regulatory systems. Here we summarize our work on the thermodynamics of human steroid receptors and their interactions with multi-site promoter sequences, highlighting results not available from more traditional biochemical and structural approaches. Noting that the Gibbs Conference has also served as a vehicle to promote the broader use of thermodynamics in understanding biology, we then discuss collaborative work on the hydrodynamics of a cytokine implicated in tumor suppression, prostate derived factor (PDF).
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Affiliation(s)
- Keith D Connaghan
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, United States
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Chaix D, Ferguson ML, Atmanene C, Van Dorsselaer A, Sanglier-Cianférani S, Royer CA, Declerck N. Physical basis of the inducer-dependent cooperativity of the Central glycolytic genes Repressor/DNA complex. Nucleic Acids Res 2010; 38:5944-57. [PMID: 20462860 PMCID: PMC2943609 DOI: 10.1093/nar/gkq334] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 04/14/2010] [Accepted: 04/18/2010] [Indexed: 11/12/2022] Open
Abstract
The Central glycolytic genes Repressor (CggR) from Bacillus subtilis belongs to the SorC family of transcription factors that control major carbohydrate metabolic pathways. Recent studies have shown that CggR binds as a tetramer to its tandem operator DNA sequences and that the inducer metabolite, fructose 1,6-bisphosphate (FBP), reduces the binding cooperativity of the CggR/DNA complex. Here, we have determined the effect of FBP on the size, shape and stoichiometry of CggR complexes with full-length and half-site operator sequence by small-angle X-ray scattering, size-exclusion chromatography, fluorescence cross-correlation spectroscopy and noncovalent mass spectrometry (MS). Our results show that CggR forms a compact tetrameric assembly upon binding to either the full-length operator or two half-site DNAs and that FBP triggers a tetramer-dimer transition that leaves a single dimer on the half-site or two physically independent dimers on the full-length target. Although the binding of other phospho-sugars was evidenced by MS, only FBP was found to completely disrupt dimer-dimer contacts. We conclude that inducer-dependent dimer-dimer bridging interactions constitute the physical basis for CggR cooperative binding to DNA and the underlying repression mechanism. This work provides experimental evidences for a cooperativity-based regulation model that should apply to other SorC family members.
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Affiliation(s)
- Denis Chaix
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Matthew L. Ferguson
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Cedric Atmanene
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Alain Van Dorsselaer
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Sarah Sanglier-Cianférani
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Catherine A. Royer
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
| | - Nathalie Declerck
- Centre de Biochimie Structurale, INSERM U554, Université de Montpellier, CNRS UMR 5048, 29 rue de Navacelles, F-34090 Montpellier, Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, IPHC, 25 rue Becquerel and CNRS UMR7178, 67087 Strasbourg, France
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