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Basu S, Shukron O, Hall D, Parutto P, Ponjavic A, Shah D, Boucher W, Lando D, Zhang W, Reynolds N, Sober LH, Jartseva A, Ragheb R, Ma X, Cramard J, Floyd R, Balmer J, Drury TA, Carr AR, Needham LM, Aubert A, Communie G, Gor K, Steindel M, Morey L, Blanco E, Bartke T, Di Croce L, Berger I, Schaffitzel C, Lee SF, Stevens TJ, Klenerman D, Hendrich BD, Holcman D, Laue ED. Publisher Correction: Live-cell three-dimensional single-molecule tracking reveals modulation of enhancer dynamics by NuRD. Nat Struct Mol Biol 2024; 31:390. [PMID: 38102414 PMCID: PMC10873192 DOI: 10.1038/s41594-023-01179-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Affiliation(s)
- S Basu
- Department of Biochemistry, University of Cambridge, Cambridge, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - O Shukron
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
| | - D Hall
- Department of Biochemistry, University of Cambridge, Cambridge, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - P Parutto
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
| | - A Ponjavic
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
- School of Physics and Astronomy, University of Leeds, Leeds, UK
- School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - D Shah
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - W Boucher
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - D Lando
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - W Zhang
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - N Reynolds
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - L H Sober
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - A Jartseva
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - R Ragheb
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - X Ma
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - J Cramard
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - R Floyd
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - J Balmer
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - T A Drury
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - A R Carr
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - L-M Needham
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - A Aubert
- The European Molecular Biology Laboratory EMBL, Grenoble, France
| | - G Communie
- The European Molecular Biology Laboratory EMBL, Grenoble, France
| | - K Gor
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
- The European Molecular Biology Laboratory, Heidelberg, Germany
| | - M Steindel
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - L Morey
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Sylvester Comprehensive Cancer Center, Department of Human Genetics, University of Miami Miller School of Medicine, Biomedical Research Building, Miami, FL, USA
| | - E Blanco
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - T Bartke
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Functional Epigenetics, Neuherberg, Germany
| | - L Di Croce
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - I Berger
- School of Biochemistry, University of Bristol, Bristol, UK
| | - C Schaffitzel
- School of Biochemistry, University of Bristol, Bristol, UK
| | - S F Lee
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - T J Stevens
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
| | - D Klenerman
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
| | - B D Hendrich
- Department of Biochemistry, University of Cambridge, Cambridge, UK.
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK.
| | - D Holcman
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France.
| | - E D Laue
- Department of Biochemistry, University of Cambridge, Cambridge, UK.
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK.
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Basu S, Shukron O, Hall D, Parutto P, Ponjavic A, Shah D, Boucher W, Lando D, Zhang W, Reynolds N, Sober LH, Jartseva A, Ragheb R, Ma X, Cramard J, Floyd R, Balmer J, Drury TA, Carr AR, Needham LM, Aubert A, Communie G, Gor K, Steindel M, Morey L, Blanco E, Bartke T, Di Croce L, Berger I, Schaffitzel C, Lee SF, Stevens TJ, Klenerman D, Hendrich BD, Holcman D, Laue ED. Live-cell three-dimensional single-molecule tracking reveals modulation of enhancer dynamics by NuRD. Nat Struct Mol Biol 2023; 30:1628-1639. [PMID: 37770717 PMCID: PMC10643137 DOI: 10.1038/s41594-023-01095-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 08/14/2023] [Indexed: 09/30/2023]
Abstract
To understand how the nucleosome remodeling and deacetylase (NuRD) complex regulates enhancers and enhancer-promoter interactions, we have developed an approach to segment and extract key biophysical parameters from live-cell three-dimensional single-molecule trajectories. Unexpectedly, this has revealed that NuRD binds to chromatin for minutes, decompacts chromatin structure and increases enhancer dynamics. We also uncovered a rare fast-diffusing state of enhancers and found that NuRD restricts the time spent in this state. Hi-C and Cut&Run experiments revealed that NuRD modulates enhancer-promoter interactions in active chromatin, allowing them to contact each other over longer distances. Furthermore, NuRD leads to a marked redistribution of CTCF and, in particular, cohesin. We propose that NuRD promotes a decondensed chromatin environment, where enhancers and promoters can contact each other over longer distances, and where the resetting of enhancer-promoter interactions brought about by the fast decondensed chromatin motions is reduced, leading to more stable, long-lived enhancer-promoter relationships.
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Affiliation(s)
- S Basu
- Department of Biochemistry, University of Cambridge, Cambridge, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - O Shukron
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
| | - D Hall
- Department of Biochemistry, University of Cambridge, Cambridge, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - P Parutto
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
| | - A Ponjavic
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
- School of Physics and Astronomy, University of Leeds, Leeds, UK
- School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - D Shah
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - W Boucher
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - D Lando
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - W Zhang
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - N Reynolds
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - L H Sober
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - A Jartseva
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - R Ragheb
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - X Ma
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - J Cramard
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
| | - R Floyd
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - J Balmer
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - T A Drury
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - A R Carr
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - L-M Needham
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - A Aubert
- The European Molecular Biology Laboratory EMBL, Grenoble, France
| | - G Communie
- The European Molecular Biology Laboratory EMBL, Grenoble, France
| | - K Gor
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
- The European Molecular Biology Laboratory, Heidelberg, Germany
| | - M Steindel
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - L Morey
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Sylvester Comprehensive Cancer Center, Department of Human Genetics, University of Miami Miller School of Medicine, Biomedical Research Building, Miami, FL, USA
| | - E Blanco
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - T Bartke
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Functional Epigenetics, Neuherberg, Germany
| | - L Di Croce
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - I Berger
- School of Biochemistry, University of Bristol, Bristol, UK
| | - C Schaffitzel
- School of Biochemistry, University of Bristol, Bristol, UK
| | - S F Lee
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - T J Stevens
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
| | - D Klenerman
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
| | - B D Hendrich
- Department of Biochemistry, University of Cambridge, Cambridge, UK.
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK.
| | - D Holcman
- Department of Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France.
| | - E D Laue
- Department of Biochemistry, University of Cambridge, Cambridge, UK.
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge, UK.
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Zhang W, Aubert A, Gomez de Segura JM, Karuppasamy M, Basu S, Murthy AS, Diamante A, Drury TA, Balmer J, Cramard J, Watson AA, Lando D, Lee SF, Palayret M, Kloet SL, Smits AH, Deery MJ, Vermeulen M, Hendrich B, Klenerman D, Schaffitzel C, Berger I, Laue ED. The Nucleosome Remodeling and Deacetylase Complex NuRD Is Built from Preformed Catalytically Active Sub-modules. J Mol Biol 2016; 428:2931-42. [PMID: 27117189 PMCID: PMC4942838 DOI: 10.1016/j.jmb.2016.04.025] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 04/18/2016] [Indexed: 11/26/2022]
Abstract
The nucleosome remodeling deacetylase (NuRD) complex is a highly conserved regulator of chromatin structure and transcription. Structural studies have shed light on this and other chromatin modifying machines, but much less is known about how they assemble and whether stable and functional sub-modules exist that retain enzymatic activity. Purification of the endogenous Drosophila NuRD complex shows that it consists of a stable core of subunits, while others, in particular the chromatin remodeler CHD4, associate transiently. To dissect the assembly and activity of NuRD, we systematically produced all possible combinations of different components using the MultiBac system, and determined their activity and biophysical properties. We carried out single-molecule imaging of CHD4 in live mouse embryonic stem cells, in the presence and absence of one of core components (MBD3), to show how the core deacetylase and chromatin-remodeling sub-modules associate in vivo. Our experiments suggest a pathway for the assembly of NuRD via preformed and active sub-modules. These retain enzymatic activity and are present in both the nucleus and the cytosol, an outcome with important implications for understanding NuRD function. We have studied Drosophila nucleosome remodeling deacetylase (NuRD) assembly. NuRD consists of a core deacetylase complex, where MTA-like acts as the scaffold. This transiently associates with a chromatin remodeling sub-module including CHD4. Single-molecule imaging shows that the two sub-modules associate through MBD-like. NuRD comprises catalytically active sub-modules in both the cytosol and the nucleus.
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Affiliation(s)
- W Zhang
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - A Aubert
- EMBL Grenoble, 71 avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France
| | - J M Gomez de Segura
- EMBL Grenoble, 71 avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France
| | - M Karuppasamy
- EMBL Grenoble, 71 avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France
| | - S Basu
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - A S Murthy
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - A Diamante
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - T A Drury
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - J Balmer
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - J Cramard
- Wellcome Trust, Medical Research Council Stem Cell Institute, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, United Kingdom
| | - A A Watson
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - D Lando
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - S F Lee
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - M Palayret
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - S L Kloet
- Department of Molecular Biology, Radboud Institute of Molecular Life Sciences, M850/3.79 Geert Grooteplein Zuid 30, 6525 GA Nijmegen, the Netherlands
| | - A H Smits
- Department of Molecular Biology, Radboud Institute of Molecular Life Sciences, M850/3.79 Geert Grooteplein Zuid 30, 6525 GA Nijmegen, the Netherlands
| | - M J Deery
- Cambridge Centre for Proteomics, Cambridge System Biology Centre, Wellcome Trust Stem Cell building, University of Cambridge, Department of Biochemistry, Tennis Court Road, Cambridge CB2 1QR, United Kingdom
| | - M Vermeulen
- Department of Molecular Biology, Radboud Institute of Molecular Life Sciences, M850/3.79 Geert Grooteplein Zuid 30, 6525 GA Nijmegen, the Netherlands
| | - B Hendrich
- Wellcome Trust, Medical Research Council Stem Cell Institute, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge CB2 1QR, United Kingdom
| | - D Klenerman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - C Schaffitzel
- EMBL Grenoble, 71 avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France; The School of Biochemistry, University of Bristol, University Walk, Clifton BS8 1TD, United Kingdom
| | - I Berger
- EMBL Grenoble, 71 avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France; The School of Biochemistry, University of Bristol, University Walk, Clifton BS8 1TD, United Kingdom
| | - E D Laue
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
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Abstract
Single-molecule fluorescence has the capability to detect properties buried in ensemble measurements and, hence, provides new insights about biological processes. Ratiometric methods are normally used to reduce the effects of excitation beam inhomogeneity. Fluorescence resonance energy transfer is widely used but there are problems in inserting the fluorophores in the correct position on the biomolecule, particularly if the structure is not known. We have recently developed two-colour coincidence single-molecule fluorescence that addresses this problem. This method can be used to determine quantitatively the multimerization states of biomolecules, in solution without separation. The future prospects of single-molecule fluorescence as applied to biological molecules are discussed.
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Affiliation(s)
- H Li
- Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW, UK
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Abstract
We have developed a novel light source for use in a scanning near-field optical microscope (SNOM or NSOM) based on a nanopipette whose distance from the sample surface is controlled using scanning ion conductance microscopy. The light source is based on the general principle of the chemical reaction between a fluorophore in the pipette and ligand in the bath, to produce a highly fluorescent complex that is continually renewed at the pipette tip. In these experiments we used fluo-3 and calcium, respectively. This complex is then excited with an Ar+ laser, focused on the pipette tip, to produce the light source. This method overcomes the transmission problem of more traditional SNOM probes and has been used to acquire simultaneous high-resolution topographic and optical images of biological samples in physiological buffer. A resolution of approximately 220 nm topographic and approximately 190 nm optical was determined through imaging fixed sea-urchin sperm flagella. Live A6 cells were also imaged, demonstrating the potential of this system for SNOM imaging of living cells.
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Affiliation(s)
- A M Rothery
- Department of Chemistry, University of Cambridge, Cambridge, UK
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6
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Gorelik J, Shevchuk A, Ramalho M, Elliott M, Lei C, Higgins CF, Lab MJ, Klenerman D, Krauzewicz N, Korchev Y. Scanning surface confocal microscopy for simultaneous topographical and fluorescence imaging: application to single virus-like particle entry into a cell. Proc Natl Acad Sci U S A 2002; 99:16018-23. [PMID: 12466501 PMCID: PMC138557 DOI: 10.1073/pnas.252458399] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We have developed a method for simultaneous recording of high-resolution topography and cell surface fluorescence in a single scan which we call scanning surface confocal microscopy. The resolution of the system allows imaging of individual fluorescent particles in the nanometer range on fixed or live cells. We used this technique to record the interaction of single virus-like particles with the cell surface and demonstrated that single particles sink into the membrane in invaginations reminiscent of caveolae or pinocytic vesicles. This method provides a technique for elucidating the interaction of individual viruses and other nanoparticles, such as gene therapy vectors, with target cells. Furthermore, this technique should find widespread application for studying the relationship of fluorescently tagged molecules with components of the cell plasma membrane.
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Affiliation(s)
- J Gorelik
- Division of Medicine and Medical Research Council Clinical Sciences Centre, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, United Kingdom
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7
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Gutow JH, Klenerman D, Zare RN. Comparison of overtone-induced and electronic photochemistry of liquid tert-butyl hydroperoxide: supporting evidence for vibrational mode selectivity. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100312a037] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Abstract
We have developed a sensitive, economical method that directly detects viruses by making use of the interaction between type 1 herpes simplex virus (HSV1) and specific antibodies covalently attached to the oscillating surface of a quartz crystal microbalance (QCM). The virions were detached from the surface by monotonously increasing the amplitude of oscillation of the QCM, while using the QCM to sensitively detect the acoustic noise produced when the interactions were broken. We term this process rupture event scanning (REVS). The method is quantitative over at least six orders of magnitude, and its sensitivity approaches detection of a single virus particle.
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Affiliation(s)
- M A Cooper
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.
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9
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Shevchuk AI, Gorelik J, Harding SE, Lab MJ, Klenerman D, Korchev YE. Simultaneous measurement of Ca2+ and cellular dynamics: combined scanning ion conductance and optical microscopy to study contracting cardiac myocytes. Biophys J 2001; 81:1759-64. [PMID: 11509385 PMCID: PMC1301650 DOI: 10.1016/s0006-3495(01)75826-2] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We have developed a distance modulated protocol for scanning ion conductance microscopy to provide a robust and reliable distance control mechanism for imaging contracting cells. The technique can measure rapid changes in cell height from 10 nm to several micrometers, with millisecond time resolution. This has been demonstrated on the extreme case of a contracting cardiac myocyte. By combining this method with laser confocal microscopy, it was possible to simultaneously measure the nanometric motion of the cardiac myocyte, and the local calcium concentration just under the cell membrane. Despite large cellular movement, simultaneous tracking of the changes in cell height and measurement of the intracellular Ca2+ near the cell surface is possible while retaining the cell functionality.
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Affiliation(s)
- A I Shevchuk
- MRC Clinical Sciences Centre, Division of Medicine, Imperial College School of Medicine, London, United Kingdom
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10
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Dultsev FN, Speight RE, Fiorini MT, Blackburn JM, Abell C, Ostanin VP, Klenerman D. Direct and quantitative detection of bacteriophage by "hearing" surface detachment using a quartz crystal microbalance. Anal Chem 2001; 73:3935-9. [PMID: 11534719 DOI: 10.1021/ac0100897] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show that it is possible to detect specifically adsorbed bacteriophage directly by breaking the interactions between proteins displayed on the phage coat and ligands immobilized on the surface of a quartz crystal microbalance (QCM). This is achieved through increasing the amplitude of oscillation of the QCM surface and sensitively detecting the acoustic emission produced when the bacteriophage detaches from the surface. There is no interference from nonspecifically adsorbed phage. The detection is quantitative over at least 5 orders of magnitude and is sensitive enough to detect as few as 20 phage. The method has potential as a sensitive and low-cost method for virus detection.
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Affiliation(s)
- F N Dultsev
- Department of Chemistry, Cambridge University, UK
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11
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Wallace MI, Ying L, Balasubramanian S, Klenerman D. Non-Arrhenius kinetics for the loop closure of a DNA hairpin. Proc Natl Acad Sci U S A 2001; 98:5584-9. [PMID: 11320222 PMCID: PMC33256 DOI: 10.1073/pnas.101523498] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2000] [Indexed: 11/18/2022] Open
Abstract
Intramolecular chain diffusion is an elementary process in the conformational fluctuations of the DNA hairpin-loop. We have studied the temperature and viscosity dependence of a model DNA hairpin-loop by FRET (fluorescence resonance energy transfer) fluctuation spectroscopy (FRETfs). Apparent thermodynamic parameters were obtained by analyzing the correlation amplitude through a two-state model and are consistent with steady-state fluorescence measurements. The kinetics of closing the loop show non-Arrhenius behavior, in agreement with theoretical prediction and other experimental measurements on peptide folding. The fluctuation rates show a fractional power dependence (beta = 0.83) on the solution viscosity. A much slower intrachain diffusion coefficient in comparison to that of polypeptides was derived based on the first passage time theory of SSS [Szabo, A., Schulten, K. & Schulten, Z. (1980) J. Chem. Phys. 72, 4350-4357], suggesting that intrachain interactions, especially stacking interaction in the loop, might increase the roughness of the free energy surface of the DNA hairpin-loop.
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Affiliation(s)
- M I Wallace
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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12
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Osborne MA, Barnes CL, Balasubramanian S, Klenerman D. Probing DNA Surface Attachment and Local Environment Using Single Molecule Spectroscopy. J Phys Chem B 2001. [DOI: 10.1021/jp0038660] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Abstract
The formation and analysis of single molecules of fluorescently labeled DNA immobilized on polystyrene microspheres is described. Analysis by confocal fluorescence microscopy revealed single-step photobleaching, characteristic of a single fluorophore. Microspheres provide a means of locating single molecules by bright-field microscopy, prior to single-molecule detection. This allows the interrogation of single molecules without suffering the limitations of premature photobleaching. Statistical analysis of fluorescence intensities for >100 microspheres suggests attachment of DNA to micropsheres to be consistent with Poisson statistics.
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Affiliation(s)
- M A Osborne
- Department of Chemistry, University of Cambridge, UK
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14
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Korchev YE, Raval M, Lab MJ, Gorelik J, Edwards CR, Rayment T, Klenerman D. Hybrid scanning ion conductance and scanning near-field optical microscopy for the study of living cells. Biophys J 2000; 78:2675-9. [PMID: 10777763 PMCID: PMC1300856 DOI: 10.1016/s0006-3495(00)76811-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
We have developed a hybrid scanning ion conductance and scanning near-field optical microscope for the study of living cells. The technique allows quantitative, high-resolution characterization of the cell surface and the simultaneous recording of topographic and optical images. A particular feature of the method is a reliable mechanism to control the distance between the probe and the sample in physiological buffer. We demonstrate this new method by recording near-field images of living cells (cardiac myocytes).
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Affiliation(s)
- Y E Korchev
- Division of Medicine, Imperial College School of Medicine, MRC Clinical Sciences Centre, Hammersmith Campus, London W12 0NN, United Kingdom.
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Couling VW, Fischer P, Klenerman D, Huber W. Ultraviolet resonance Raman study of drug binding in dihydrofolate reductase, gyrase, and catechol O-methyltransferase. Biophys J 1998; 75:1097-106. [PMID: 9675211 PMCID: PMC1299784 DOI: 10.1016/s0006-3495(98)77599-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This paper presents a study of the use of ultraviolet resonance Raman (UVRR) spectroscopic methods as a means of elucidating aspects of drug-protein interactions. Some of the RR vibrational bands of the aromatic amino acids tyrosine and tryptophan are sensitive to the microenvironment, and the use of UV excitation radiation allows selective enhancement of the spectral features of the aromatic amino acids, enabling observation specifically of their change in microenvironment upon drug binding. The three drug-protein systems investigated in this study are dihydrofolate reductase with its inhibitor trimethoprim, gyrase with novobiocin, and catechol O-methyltransferase with dinitrocatechol. It is demonstrated that UVRR spectroscopy has adequate sensitivity to be a useful means of detecting drug-protein interactions in those systems for which the electronic absorption of the aromatic amino acids changes because of hydrogen bonding and/or possible dipole-dipole and dipole-polarizability interactions with the ligand.
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Affiliation(s)
- V W Couling
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, England
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Osborne MA, Balasubramanian S, Furey WS, Klenerman D. Optically Biased Diffusion of Single Molecules Studied by Confocal Fluorescence Microscopy. J Phys Chem B 1998. [DOI: 10.1021/jp9715078] [Citation(s) in RCA: 118] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Scanning near-field optical microscopy can provide images with a resolution less than the wavelength of light, and therefore ought in principle to be of great value in studies of biological structures. In this work we show how for the first time images have been obtained of tobacco mosaic virus particles at 60-nm resolution, combined with chemical imaging using monoclonal antibodies under in vitro conditions.
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Affiliation(s)
- T H Keller
- Department of Chemistry, University of Cambridge, England
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Furey WS, Joyce CM, Osborne MA, Klenerman D, Peliska JA, Balasubramanian S. Use of fluorescence resonance energy transfer to investigate the conformation of DNA substrates bound to the Klenow fragment. Biochemistry 1998; 37:2979-90. [PMID: 9485450 DOI: 10.1021/bi9719758] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Fluorescence resonance energy transfer (FRET) has been used to investigate the conformation of the single stranded region for a series of fluorescent DNA template-primers bound to the Klenow fragment (KF) of Escherichia coli DNA polymerase I. Fluorescent derivatives of template-primer DNA, modified with tetramethylrhodamine (TMR), served as energy transfer acceptors to the donor fluorescein fluorophore used to modify cysteine 751 in the double mutant KF (S751C, C907S). Design of the template-primer allowed the probe's position within the DNA-protein complex to be varied by stepwise extension of the primer strand upon addition of the appropriate deoxynucleoside triphosphates (dNTP). The TMR acceptor probe occupied seven different positions in the template-primers, five in the single stranded region and two in the double stranded region. The efficiency of energy transfer was determined at each position by calculating the integrated area of the fluorescein emission peak in the presence and absence of acceptor. Results indicate that the FRET efficiency varied in a sinusoidal fashion with a periodicity of approximately 10 base pairs and that the data could be fitted to an equation derived from a simple model formulated on the basis of helical structure. The data support the conclusion that the single stranded template portion of a DNA template-primer adopts a helical conformation when bound to the KF. The results of this study further support FRET as a useful method for the determination of structure and conformation in protein-DNA complexes.
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Affiliation(s)
- W S Furey
- University Chemical Laboratory, Cambridge University, Lensfield Road, Cambridge CB2 1EW, U.K
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Smyrl WH, Hillman AR, Swann MJ, Kruger J, Hamnett A, Greef R, Christensen PA, Peter LM, Parsons R, Caffrey M, Graves P, Nagy G, Chabala ED, Fujishima A, Klenerman D, Baltruschat H, Williams DE, Lewerenz HJ, Bard AJ, Seitz-Beywl J, Magnussen O, Schiffrin DJ, Paliteiro CA, Fitzmaurice D, Goff AHL, Siegenthaler H, Itaya K, Uosaki K, Allongue P, Peat R, Bade K. General discussion. Faraday Discuss 1992. [DOI: 10.1039/fd9929400387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
The technique of multiplexed optically heterodyned Raman-induced Kerr-effect spectroscopy is extended to the blue at 378 nm. Despite both weaker probe and pump lasers than in our previous research in the visible [Chem. Phys. Lett. 168, 579 (1990)], it is possible to obtain spectra with a good signal-to-noise ratio from simple solvents, demonstrating the feasibility of the technique in the blue and ultraviolet.
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Klenerman D, Gerrard D, Herman H, MacPherson M. Optically heterodyned Raman-induced Kerr-effect spectroscopy using a white-light continuum. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)85675-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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