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Bogomolov A, Filonov S, Chadaeva I, Rasskazov D, Khandaev B, Zolotareva K, Kazachek A, Oshchepkov D, Ivanisenko VA, Demenkov P, Podkolodnyy N, Kondratyuk E, Ponomarenko P, Podkolodnaya O, Mustafin Z, Savinkova L, Kolchanov N, Tverdokhleb N, Ponomarenko M. Candidate SNP Markers Significantly Altering the Affinity of TATA-Binding Protein for the Promoters of Human Hub Genes for Atherogenesis, Atherosclerosis and Atheroprotection. Int J Mol Sci 2023; 24:ijms24109010. [PMID: 37240358 DOI: 10.3390/ijms24109010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/13/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Atherosclerosis is a systemic disease in which focal lesions in arteries promote the build-up of lipoproteins and cholesterol they are transporting. The development of atheroma (atherogenesis) narrows blood vessels, reduces the blood supply and leads to cardiovascular diseases. According to the World Health Organization (WHO), cardiovascular diseases are the leading cause of death, which has been especially boosted since the COVID-19 pandemic. There is a variety of contributors to atherosclerosis, including lifestyle factors and genetic predisposition. Antioxidant diets and recreational exercises act as atheroprotectors and can retard atherogenesis. The search for molecular markers of atherogenesis and atheroprotection for predictive, preventive and personalized medicine appears to be the most promising direction for the study of atherosclerosis. In this work, we have analyzed 1068 human genes associated with atherogenesis, atherosclerosis and atheroprotection. The hub genes regulating these processes have been found to be the most ancient. In silico analysis of all 5112 SNPs in their promoters has revealed 330 candidate SNP markers, which statistically significantly change the affinity of the TATA-binding protein (TBP) for these promoters. These molecular markers have made us confident that natural selection acts against underexpression of the hub genes for atherogenesis, atherosclerosis and atheroprotection. At the same time, upregulation of the one for atheroprotection promotes human health.
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Affiliation(s)
- Anton Bogomolov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Sergey Filonov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
- The Natural Sciences Department, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Irina Chadaeva
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Dmitry Rasskazov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Bato Khandaev
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
- The Natural Sciences Department, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Karina Zolotareva
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
- The Natural Sciences Department, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Anna Kazachek
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
- The Natural Sciences Department, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Dmitry Oshchepkov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Vladimir A Ivanisenko
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Pavel Demenkov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Nikolay Podkolodnyy
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
- Institute of Computational Mathematics and Mathematical Geophysics, Novosibirsk 630090, Russia
| | - Ekaterina Kondratyuk
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Petr Ponomarenko
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Olga Podkolodnaya
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Zakhar Mustafin
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Ludmila Savinkova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Nikolay Kolchanov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Natalya Tverdokhleb
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
| | - Mikhail Ponomarenko
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia
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Ye F, Kotta-Loizou I, Jovanovic M, Liu X, Dryden DTF, Buck M, Zhang X. Structural basis of transcription inhibition by the DNA mimic protein Ocr of bacteriophage T7. eLife 2020; 9:e52125. [PMID: 32039758 PMCID: PMC7064336 DOI: 10.7554/elife.52125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/08/2020] [Indexed: 01/25/2023] Open
Abstract
Bacteriophage T7 infects Escherichia coli and evades the host restriction/modification system. The Ocr protein of T7 was shown to exist as a dimer mimicking DNA and to bind to host restriction enzymes, thus preventing the degradation of the viral genome by the host. Here we report that Ocr can also inhibit host transcription by directly binding to bacterial RNA polymerase (RNAP) and competing with the recruitment of RNAP by sigma factors. Using cryo electron microscopy, we determined the structures of Ocr bound to RNAP. The structures show that an Ocr dimer binds to RNAP in the cleft, where key regions of sigma bind and where DNA resides during transcription synthesis, thus providing a structural basis for the transcription inhibition. Our results reveal the versatility of Ocr in interfering with host systems and suggest possible strategies that could be exploited in adopting DNA mimicry as a basis for forming novel antibiotics.
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Affiliation(s)
- Fuzhou Ye
- Section of Structural Biology, Department of Infectious Diseases, Faculty of MedicineImperial College LondonLondonUnited Kingdom
| | - Ioly Kotta-Loizou
- Department of Life Sciences, Faculty of Natural SciencesImperial College LondonLondonUnited Kingdom
| | - Milija Jovanovic
- Department of Life Sciences, Faculty of Natural SciencesImperial College LondonLondonUnited Kingdom
| | - Xiaojiao Liu
- Section of Structural Biology, Department of Infectious Diseases, Faculty of MedicineImperial College LondonLondonUnited Kingdom
- College of Food Science and EngineeringNorthwest A&F UniversityYanglingChina
| | | | - Martin Buck
- Department of Life Sciences, Faculty of Natural SciencesImperial College LondonLondonUnited Kingdom
| | - Xiaodong Zhang
- Section of Structural Biology, Department of Infectious Diseases, Faculty of MedicineImperial College LondonLondonUnited Kingdom
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Legrand N, Bretscher CL, Zielke S, Wilke B, Daude M, Fritz B, Diederich WE, Adhikary T. PPARβ/δ recruits NCOR and regulates transcription reinitiation of ANGPTL4. Nucleic Acids Res 2019; 47:9573-9591. [PMID: 31428774 PMCID: PMC6765110 DOI: 10.1093/nar/gkz685] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 07/20/2019] [Accepted: 07/28/2019] [Indexed: 12/24/2022] Open
Abstract
In the absence of ligands, the nuclear receptor PPARβ/δ recruits the NCOR and SMRT corepressors, which form complexes with HDAC3, to canonical target genes. Agonistic ligands cause dissociation of corepressors and enable enhanced transcription. Vice versa, synthetic inverse agonists augment corepressor recruitment and repression. Both basal repression of the target gene ANGPTL4 and reinforced repression elicited by inverse agonists are partially insensitive to HDAC inhibition. This raises the question how PPARβ/δ represses transcription mechanistically. We show that the PPARβ/δ inverse agonist PT-S264 impairs transcription initiation by decreasing recruitment of activating Mediator subunits, RNA polymerase II, and TFIIB, but not of TFIIA, to the ANGPTL4 promoter. Mass spectrometry identifies NCOR as the main PT-S264-dependent interactor of PPARβ/δ. Reconstitution of knockout cells with PPARβ/δ mutants deficient in basal repression results in diminished recruitment of NCOR, SMRT, and HDAC3 to PPAR target genes, while occupancy by RNA polymerase II is increased. PT-S264 restores binding of NCOR, SMRT, and HDAC3 to the mutants, resulting in reduced polymerase II occupancy. Our findings corroborate deacetylase-dependent and -independent repressive functions of HDAC3-containing complexes, which act in parallel to downregulate transcription.
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Affiliation(s)
- Nathalie Legrand
- Department of Medicine, Institute for Molecular Biology and Tumour Research, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Clemens L Bretscher
- Department of Medicine, Institute for Molecular Biology and Tumour Research, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Svenja Zielke
- Department of Medicine, Institute for Molecular Biology and Tumour Research, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Bernhard Wilke
- Department of Medicine, Institute for Molecular Biology and Tumour Research, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany.,Department of Medicine, Institute for Medical Bioinformatics and Biostatistics, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Michael Daude
- Core Facility Medicinal Chemistry, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Barbara Fritz
- Centre for Human Genetics, Universitätsklinikum Giessen und Marburg GmbH, Baldingerstrasse, 35043 Marburg, Germany
| | - Wibke E Diederich
- Core Facility Medicinal Chemistry, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany.,Department of Pharmacy, Institute for Pharmaceutical Chemistry, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
| | - Till Adhikary
- Department of Medicine, Institute for Molecular Biology and Tumour Research, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany.,Department of Medicine, Institute for Medical Bioinformatics and Biostatistics, Centre for Tumour Biology and Immunology, Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany
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Abstract
Transcription of eukaryotic protein-coding genes commences with the assembly of a conserved initiation complex, which consists of RNA polymerase II (Pol II) and the general transcription factors, at promoter DNA. After two decades of research, the structural basis of transcription initiation is emerging. Crystal structures of many components of the initiation complex have been resolved, and structural information on Pol II complexes with general transcription factors has recently been obtained. Although mechanistic details await elucidation, available data outline how Pol II cooperates with the general transcription factors to bind to and open promoter DNA, and how Pol II directs RNA synthesis and escapes from the promoter.
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The RPB2 flap loop of human RNA polymerase II is dispensable for transcription initiation and elongation. Mol Cell Biol 2011; 31:3312-25. [PMID: 21670157 DOI: 10.1128/mcb.05318-11] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The flap domain of multisubunit RNA polymerases (RNAPs), also called the wall, forms one side of the RNA exit channel. In bacterial RNAP, the mobile part of the flap is called the flap tip and makes essential contacts with initiation and elongation factors. Cocrystal structures suggest that the orthologous part of eukaryotic RNAPII, called the flap loop, contacts transcription factor IIB (TFIIB), but the function of the flap loop has not been assessed. We constructed and tested a deletion of the flap loop in human RNAPII (subunit RPB2 Δ873-884) that removes the flap loop interaction interface with TFIIB. Genome-wide analysis of the distribution of the RNAPII with the flap loop deletion expressed in a human embryonic kidney cell line (HEK 293) revealed no effect of the flap loop on global transcription initiation, RNAPII occupancy within genes, or the efficiency of promoter escape and productive elongation. In vitro, the flap loop deletion had no effect on promoter binding, abortive initiation or promoter escape, TFIIS-stimulated transcript cleavage, or inhibition of transcript elongation by the complex of negative elongation factor (NELF) and 5,6-dichloro-1-β-d-ribofuranosylbenzimidazole (DRB) sensitivity-inducing factor (DSIF). A modest effect on transcript elongation and pausing was suppressed by TFIIF. Although similar to the flap tip of bacterial RNAP, the RNAPII flap loop is not equivalently essential.
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Wang Y, Joshi T, Zhang XS, Xu D, Chen L. Inferring gene regulatory networks from multiple microarray datasets. ACTA ACUST UNITED AC 2006; 22:2413-20. [PMID: 16864593 DOI: 10.1093/bioinformatics/btl396] [Citation(s) in RCA: 227] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
MOTIVATION Microarray gene expression data has increasingly become the common data source that can provide insights into biological processes at a system-wide level. One of the major problems with microarrays is that a dataset consists of relatively few time points with respect to a large number of genes, which makes the problem of inferring gene regulatory network an ill-posed one. On the other hand, gene expression data generated by different groups worldwide are increasingly accumulated on many species and can be accessed from public databases or individual websites, although each experiment has only a limited number of time-points. RESULTS This paper proposes a novel method to combine multiple time-course microarray datasets from different conditions for inferring gene regulatory networks. The proposed method is called GNR (Gene Network Reconstruction tool) which is based on linear programming and a decomposition procedure. The method theoretically ensures the derivation of the most consistent network structure with respect to all of the datasets, thereby not only significantly alleviating the problem of data scarcity but also remarkably improving the prediction reliability. We tested GNR using both simulated data and experimental data in yeast and Arabidopsis. The result demonstrates the effectiveness of GNR in terms of predicting new gene regulatory relationship in yeast and Arabidopsis. AVAILABILITY The software is available from http://zhangorup.aporc.org/bioinfo/grninfer/, http://digbio.missouri.edu/grninfer/ and http://intelligent.eic.osaka-sandai.ac.jp or upon request from the authors.
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Affiliation(s)
- Yong Wang
- Department of Electrical Engineering and Electronics, Osaka Sangyo University, Osaka 574-8530, Japan
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7
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Chromatin Remodeling by RNA Polymerase II. Mol Biol 2005. [DOI: 10.1007/s11008-005-0071-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Smith JJ, Cole ES, Romero DP. Transcriptional control of RAD51 expression in the ciliate Tetrahymena thermophila. Nucleic Acids Res 2004; 32:4313-21. [PMID: 15304567 PMCID: PMC514391 DOI: 10.1093/nar/gkh771] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2004] [Revised: 07/27/2004] [Accepted: 07/27/2004] [Indexed: 11/15/2022] Open
Abstract
The expression of Rad51p, a DNA repair protein that mediates homologous recombination, is induced by DNA damage and during both meiosis and exconjugant development in the ciliate Tetrahymena thermophila. To completely investigate the transcriptional regulation of Tetrahymena RAD51 expression, reporter genes consisting of the RAD51 5' non-translated sequence (5' NTS) positioned upstream of either the firefly luciferase or green fluorescent protein coding sequences have been targeted for recombination at the macronuclear btu1-1 (K350M) locus of T. thermophila strain CU522. Expression from RAD51-luciferase reporter constructs has been directly quantified from transformant whole cell lysates. Luciferase is induced to maximum levels in transformants harboring the full-length RAD51-luciferase reporter gene following exposure to DNA damaging UV irradiation. A series of truncations, deletions, insertions, substitutions and inversions of the RAD51 5' NTS have led to the identification of three distinct transcriptional promoter elements. The first of these sequence elements is required for basal levels of transcription. The second modulates expression in the absence of DNA damage, whereas the third ensures increased RAD51 transcription in response to DNA damage and during meiosis. Tetrahymena RAD51 is tightly regulated through these transcriptional elements to produce the appropriate expression during conjugation, and in response to DNA damage.
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Affiliation(s)
- Joshua J Smith
- Department of Pharmacology, Medical School, University of Minnesota, Minneapolis, MN 55455, USA
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9
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Chromatin structure and dynamics: a historical perspective. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/s0167-7306(03)39001-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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10
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Myers LC, Lacomis L, Erdjument-Bromage H, Tempst P. The yeast capping enzyme represses RNA polymerase II transcription. Mol Cell 2002; 10:883-94. [PMID: 12419231 DOI: 10.1016/s1097-2765(02)00644-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using a highly pure transcription system derived from Saccharomyces cerevisiae, we have purified an activity in yeast whole-cell extracts that represses RNA polymerase II transcription. Mechanistic studies suggest that this repressor specifically targets transcriptional reinitiation. The two polypeptides that constitute the repressor have been identified as Ceg1p and Cet1p, the two subunits of the yeast pre-mRNA capping enzyme. A purified recombinant capping enzyme is able to reconstitute repressor activity. Cet1p is necessary for and capable of this repression. Transcriptional run-on experiments indicate that the capping enzyme also serves as a repressor in vivo. Efficient pre-mRNA capping relies on interactions between the capping enzyme and transcription apparatus. Repression by the capping enzyme suggests a bidirectional flow of information between capping and transcription.
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Affiliation(s)
- Lawrence C Myers
- Department of Biochemistry, Dartmouth Medical School, Hanover, NH 03755, USA.
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Borggrefe T, Davis R, Bareket-Samish A, Kornberg RD. Quantitation of the RNA polymerase II transcription machinery in yeast. J Biol Chem 2001; 276:47150-3. [PMID: 11591727 DOI: 10.1074/jbc.m109581200] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
TAP tags and dot blot analysis have been used to measure the amounts of RNA polymerase II transcription proteins in crude yeast extracts. The measurements showed comparable amounts of RNA polymerase II, TFIIE, and TFIIF, lower levels of TBP and TFIIB, and still lower levels of Mediator and TFIIH. These findings are consistent with the presumed roles of the transcription proteins, but do not support the idea of their recruitment in a single large complex to RNA polymerase II promoters. The approach employed here can be readily extended to quantitative analysis of the entire yeast proteome.
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Affiliation(s)
- T Borggrefe
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 9430
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12
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Affiliation(s)
- J R Bone
- Department of Biochemistry and Molecular Biology, Box 117, University of Texas, M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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Abstract
Three lines of evidence have converged on a multiprotein Mediator complex as a conserved interface between gene-specific regulatory proteins and the general transcription apparatus of eukaryotes. Mediator was discovered as an activity required for transcriptional activation in a reconstituted system from yeast. Upon resolution to homogeneity, the activity proved to reside in a 20-protein complex, which could exist in a free state or in a complex with RNA polymerase II, termed holoenzyme. A second line of evidence came from screens in yeast for mutations affecting transcription. Two-thirds of Mediator subunits are encoded by genes revealed by these screens. Five of the genetically defined subunits, termed Srbs, were characterized as interacting with the C-terminal domain of RNA polymerase II in vivo, and were shown to bind polymerase in vitro. A third line of evidence has come recently from studies in mammalian transcription systems. Mammalian counterparts of yeast Mediator were shown to interact with transcriptional activator proteins and to play an essential role in transcriptional regulation. Mediator evidently integrates and transduces positive and negative regulatory information from enhancers and operators to promoters. It functions directly through RNA polymerase II, modulating its activity in promoter-dependent transcription. Details of the Mediator mechanism remain obscure. Additional outstanding questions include the patterns of promoter-specificity of the various Mediator subunits, the possible cell-type-specificity of Mediator subunit composition, and the full structures of both free Mediator and RNA polymerase II holoenzyme.
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Affiliation(s)
- L C Myers
- Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA
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Buck M, Gallegos MT, Studholme DJ, Guo Y, Gralla JD. The bacterial enhancer-dependent sigma(54) (sigma(N)) transcription factor. J Bacteriol 2000; 182:4129-36. [PMID: 10894718 PMCID: PMC101881 DOI: 10.1128/jb.182.15.4129-4136.2000] [Citation(s) in RCA: 343] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- M Buck
- Department of Biology, Imperial College of Science, Technology and Medicine, London SW7 2AZ, United Kingdom.
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