51
|
Gözen I, Jesorka A. Instrumental Methods to Characterize Molecular Phospholipid Films on Solid Supports. Anal Chem 2012; 84:822-38. [DOI: 10.1021/ac203126f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Irep Gözen
- Department of Chemical and Biological
Engineering, Chalmers University of Technology, Kemivägen 10, 41296 Göteborg, Sweden
| | - Aldo Jesorka
- Department of Chemical and Biological
Engineering, Chalmers University of Technology, Kemivägen 10, 41296 Göteborg, Sweden
| |
Collapse
|
52
|
Winter PW, Al-Qatati A, Wolf-Ringwall AL, Schoeberl S, Chatterjee PB, Barisas BG, Roess DA, Crans DC. The anti-diabetic bis(maltolato)oxovanadium(iv) decreases lipid order while increasing insulin receptor localization in membrane microdomains. Dalton Trans 2012; 41:6419-30. [DOI: 10.1039/c2dt30521f] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
53
|
Ghosh S, Mandal AK, Das AK, Mondal T, Bhattacharyya K. Diffusion of organic dyes in a niosome immobilized on a glass surface using fluorescence correlation spectroscopy. Phys Chem Chem Phys 2012; 14:9749-57. [DOI: 10.1039/c2cp41212h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
54
|
Fluorescence correlation spectroscopic examination of insulin and insulin-like growth factor 1 binding to live cells. Biophys Chem 2011; 159:303-10. [DOI: 10.1016/j.bpc.2011.08.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/10/2011] [Accepted: 08/11/2011] [Indexed: 12/14/2022]
|
55
|
Wolf-Ringwall AL, Winter PW, Liu J, Van Orden AK, Roess DA, Barisas BG. Restricted lateral diffusion of luteinizing hormone receptors in membrane microdomains. J Biol Chem 2011; 286:29818-27. [PMID: 21690095 DOI: 10.1074/jbc.m111.250969] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Single particle tracking was used to evaluate lateral motions of individual FLAG-tagged human luteinizing hormone (LH) receptors expressed on CHO cells and native LH receptors on both KGN human granulosa-derived tumor cells and M17 human neuroblastoma cells before and after exposure to human chorionic gonadotropin (hCG). Compared with LH receptors on untreated cells, LH receptors on cells treated with 100 nm hCG exhibit restricted lateral diffusion and are confined in small, nanometer-scale, membrane compartments. Similar to LH receptors labeled with Au-hCG, LH receptors labeled with gold-deglycosylated hCG, an hCG antagonist, also exhibit restricted lateral diffusion and are confined in nanoscale membrane compartments on KGN cells treated with 100 nm hCG. LH receptor point mutants lacking potential palmitoylation sites remain in large compartments despite treatment with 100 nm hCG as do LH receptors on cells treated with cytochalasin D. Finally, both polarization homotransfer fluorescence resonance energy transfer imaging and photon counting histogram analysis indicate that treatment with hCG induces aggregation of YFP-coupled LH receptors stably expressed on CHO cells. Taken together, our results demonstrate that binding of hCG induces aggregation of LH receptors within nanoscale, cell surface membrane compartments, that hCG binding also affects the lateral motions of antagonist binding LH receptors, and that receptor surface densities must be considered in evaluating the extent of hormone-dependent receptor aggregation.
Collapse
Affiliation(s)
- Amber L Wolf-Ringwall
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado 80523, USA
| | | | | | | | | | | |
Collapse
|
56
|
Allgeyer ES, Sterling SM, Neivandt DJ, Mason MD. Low axial drift stage and temperature controlled liquid cell for z-scan fluorescence correlation spectroscopy in an inverted confocal geometry. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:053708. [PMID: 21639508 DOI: 10.1063/1.3590017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A recent iteration of fluorescence correlation spectroscopy (FCS), z-scan FCS, has drawn attention for its elegant solution to the problem of quantitative sample positioning when investigating two-dimensional systems while simultaneously providing an excellent method for extracting calibration-free diffusion coefficients. Unfortunately, the measurement of planar systems using (FCS and) z-scan FCS still requires extremely mechanically stable sample positioning, relative to a microscope objective. As axial sample position serves as the inherent length calibration, instabilities in sample position will affect measured diffusion coefficients. Here, we detail the design and function of a highly stable and mechanically simple inverted microscope stage that includes a temperature controlled liquid cell. The stage and sample cell are ideally suited to planar membrane investigations, but generally amenable to any quantitative microscopy that requires low drift and excellent axial and lateral stability. In the present work we evaluate the performance of our custom stage system and compare it with the stock microscope stage and typical sample sealing and holding methods.
Collapse
Affiliation(s)
- Edward S Allgeyer
- Department of Physics and Astronomy, University of Maine, Orono, Maine 04469, USA
| | | | | | | |
Collapse
|
57
|
Effects of curvature and composition on α-synuclein binding to lipid vesicles. Biophys J 2011; 99:2279-88. [PMID: 20923663 DOI: 10.1016/j.bpj.2010.07.056] [Citation(s) in RCA: 278] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 07/23/2010] [Accepted: 07/26/2010] [Indexed: 11/21/2022] Open
Abstract
Parkinson's disease is characterized by the presence of intracellular aggregates composed primarily of the neuronal protein α-synuclein (αS). Interactions between αS and various cellular membranes are thought to be important to its native function as well as relevant to its role in disease. We use fluorescence correlation spectroscopy to investigate binding of αS to lipid vesicles as a function of the lipid composition and membrane curvature. We determine how these parameters affect the molar partition coefficient of αS, providing a quantitative measure of the binding energy, and calculate the number of lipids required to bind a single protein. Specific anionic lipids have a large effect on the free energy of binding. Lipid chain saturation influences the binding interaction to a lesser extent, with larger partition coefficients measured for gel-phase vesicles than for fluid-phase vesicles, even in the absence of anionic lipid components. Although we observe variability in the binding of the mutant proteins, differences in the free energies of partitioning are less dramatic than with varied lipid compositions. Vesicle curvature has a strong effect on the binding affinity, with a >15-fold increase in affinity for small unilamellar vesicles over large unilamellar vesicles, suggesting that αS may be a curvature-sensing protein. Our findings provide insight into how physical properties of the membrane may modulate interactions of αS with cellular membranes.
Collapse
|
58
|
van den Wildenberg SMJL, Bollen YJM, Peterman EJG. How to quantify protein diffusion in the bacterial membrane. Biopolymers 2011; 95:312-21. [PMID: 21240922 DOI: 10.1002/bip.21585] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 12/10/2010] [Accepted: 12/10/2010] [Indexed: 01/18/2023]
Abstract
Lateral diffusion of proteins in the plane of a biological membrane is important for many vital processes, including energy conversion, signaling, chemotaxis, cell division, protein insertion, and secretion. In bacteria, all these functions are located in a single membrane. Therefore, quantitative measurements of protein diffusion in bacterial membranes can provide insight into many important processes. Diffusion of membrane proteins in eukaryotes has been studied in detail using various experimental techniques, including fluorescence correlation spectroscopy (FCS), fluorescence recovery after photobleaching (FRAP), and particle tracking using single-molecule fluorescence (SMF) microscopy. In case of bacteria, such experiments are intrinsically difficult due to the small size of the cells. Here, we review these experimental approaches to quantify diffusion in general and their strengths and weaknesses when applied to bacteria. In addition, we propose a method to extract multiple diffusion coefficients from trajectories obtained from SMF data, using cumulative probability distributions (CPDs). We demonstrate the power of this approach by quantifying the heterogeneous diffusion of the bacterial membrane protein TatA, which forms a pore for the translocation of folded proteins. Using computer simulations, we study the effect of cell dimensions and membrane curvature on measured CPDs. We find that at least two mobile populations with distinct diffusion coefficients (of 7 and 169 nm(2) ms(-1) , respectively) are necessary to explain the experimental data. The approach described here should be widely applicable for the quantification of membrane-protein diffusion in living bacteria.
Collapse
|
59
|
Schwille P, Ries J. Principles and Applications of Fluorescence Correlation Spectroscopy (FCS). BIOPHOTONICS: SPECTROSCOPY, IMAGING, SENSING, AND MANIPULATION 2011. [DOI: 10.1007/978-90-481-9977-8_4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
60
|
Štefl M, Macháň R, Hof M. Z-Scan Fluorescence Correlation Spectroscopy: A Powerful Tool for Determination of Lateral Diffusion in Biological Systems. REVIEWS IN FLUORESCENCE 2009 2011. [DOI: 10.1007/978-1-4419-9672-5_12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
61
|
Fluorescence Correlation and Cross-Correlation Spectroscopy Using Fluorescent Proteins for Measurements of Biomolecular Processes in Living Organisms. FLUORESCENT PROTEINS II 2011. [DOI: 10.1007/4243_2011_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
|
62
|
A Multiparametric Fluorescence Approach for Biomembrane Studies. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/b978-0-12-387721-5.00005-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
63
|
Elgass K, Caesar K, Harter K, Meixner AJ, Schleifenbaum F. Combining ocFLIM and FIDSAM reveals fast and dynamic physiological responses at subcellular resolution in living plant cells. J Microsc 2010; 242:124-31. [DOI: 10.1111/j.1365-2818.2010.03446.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K Elgass
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle, Tübingen, Germany
| | | | | | | | | |
Collapse
|
64
|
Sanguigno L, De Santo I, Causa F, Netti P. A Closed Form for Fluorescence Correlation Spectroscopy Experiments in Submicrometer Structures. Anal Chem 2010; 82:9663-70. [DOI: 10.1021/ac102084m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luigi Sanguigno
- Centre for Advanced Biomaterials for Health Care, Italian Institute of Technology (IIT) and Department of Materials and Production Engineering and Interdisciplinary Research Centre on Biomaterials, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy, and Technological District in Polymer and Composite Engineering (IMAST Scarl), P.le Fermi 1, 80055, Portici, Naples, Italy
| | - Ilaria De Santo
- Centre for Advanced Biomaterials for Health Care, Italian Institute of Technology (IIT) and Department of Materials and Production Engineering and Interdisciplinary Research Centre on Biomaterials, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy, and Technological District in Polymer and Composite Engineering (IMAST Scarl), P.le Fermi 1, 80055, Portici, Naples, Italy
| | - Filippo Causa
- Centre for Advanced Biomaterials for Health Care, Italian Institute of Technology (IIT) and Department of Materials and Production Engineering and Interdisciplinary Research Centre on Biomaterials, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy, and Technological District in Polymer and Composite Engineering (IMAST Scarl), P.le Fermi 1, 80055, Portici, Naples, Italy
| | - Paolo Netti
- Centre for Advanced Biomaterials for Health Care, Italian Institute of Technology (IIT) and Department of Materials and Production Engineering and Interdisciplinary Research Centre on Biomaterials, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy, and Technological District in Polymer and Composite Engineering (IMAST Scarl), P.le Fermi 1, 80055, Portici, Naples, Italy
| |
Collapse
|
65
|
Ortega F, Ritacco H, Rubio RG. Interfacial microrheology: Particle tracking and related techniques. Curr Opin Colloid Interface Sci 2010. [DOI: 10.1016/j.cocis.2010.03.001] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
66
|
Macháň R, Hof M. Lipid diffusion in planar membranes investigated by fluorescence correlation spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1377-91. [DOI: 10.1016/j.bbamem.2010.02.014] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 02/10/2010] [Accepted: 02/10/2010] [Indexed: 11/25/2022]
|
67
|
Rayan G, Guet JE, Taulier N, Pincet F, Urbach W. Recent applications of fluorescence recovery after photobleaching (FRAP) to membrane bio-macromolecules. SENSORS 2010; 10:5927-48. [PMID: 22219695 PMCID: PMC3247740 DOI: 10.3390/s100605927] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 05/10/2010] [Accepted: 05/28/2010] [Indexed: 01/24/2023]
Abstract
This review examines some recent applications of fluorescence recovery after photobleaching (FRAP) to biopolymers, while mainly focusing on membrane protein studies. Initially, we discuss the lateral diffusion of membrane proteins, as measured by FRAP. Then, we talk about the use of FRAP to probe interactions between membrane proteins by obtaining fundamental information such as geometry and stoichiometry of the interacting complex. Afterwards, we discuss some applications of FRAP at the cellular level as well as the level of organisms. We conclude by comparing diffusion coefficients obtained by FRAP and several other alternative methods.
Collapse
Affiliation(s)
- Gamal Rayan
- Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, associe aux Universites Paris 6 et Paris 7, CNRS UMR 8550, 24 rue Lhomond, 75005 Paris, France.
| | | | | | | | | |
Collapse
|
68
|
Powe AM, Das S, Lowry M, El-Zahab B, Fakayode SO, Geng ML, Baker GA, Wang L, McCarroll ME, Patonay G, Li M, Aljarrah M, Neal S, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2010; 82:4865-94. [DOI: 10.1021/ac101131p] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Aleeta M. Powe
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Susmita Das
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Mark Lowry
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Bilal El-Zahab
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Sayo O. Fakayode
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Maxwell L. Geng
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Gary A. Baker
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Lin Wang
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Matthew E. McCarroll
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Gabor Patonay
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Min Li
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Mohannad Aljarrah
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Sharon Neal
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| | - Isiah M. Warner
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, Department of Chemistry, Nanoscience and Nanotechnology Institute and the Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department
| |
Collapse
|
69
|
Ries J, Bayer M, Csúcs G, Dirkx R, Solimena M, Ewers H, Schwille P. Automated suppression of sample-related artifacts in Fluorescence Correlation Spectroscopy. OPTICS EXPRESS 2010; 18:11073-11082. [PMID: 20588964 DOI: 10.1364/oe.18.011073] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Fluorescence Correlation Spectroscopy (FCS) in cells often suffers from artifacts caused by bright aggregates or vesicles, depletion of fluorophores or bleaching of a fluorescent background. The common practice of manually discarding distorted curves is time consuming and subjective. Here we demonstrate the feasibility of automated FCS data analysis with efficient rejection of corrupted parts of the signal. As test systems we use a solution of fluorescent molecules, contaminated with bright fluorescent beads, as well as cells expressing a fluorescent protein (ICA512-EGFP), which partitions into bright secretory granules. This approach improves the accuracy of FCS measurements in biological samples, extends its applicability to especially challenging systems and greatly simplifies and accelerates the data analysis.
Collapse
Affiliation(s)
- Jonas Ries
- ETH Zürich, Laboratory of Physical Chemistry, Wolfgang-Pauli-Str. 10, 8093 Zürich, Switzerland.
| | | | | | | | | | | | | |
Collapse
|
70
|
Surface analysis of membrane dynamics. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:766-76. [DOI: 10.1016/j.bbamem.2009.09.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 09/18/2009] [Accepted: 09/20/2009] [Indexed: 11/18/2022]
|
71
|
Macháň R, Hof M. Recent developments in fluorescence correlation spectroscopy for diffusion measurements in planar lipid membranes. Int J Mol Sci 2010; 11:427-457. [PMID: 20386647 PMCID: PMC2852847 DOI: 10.3390/ijms11020427] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 01/11/2010] [Accepted: 01/15/2010] [Indexed: 12/11/2022] Open
Abstract
Fluorescence correlation spectroscopy (FCS) is a single molecule technique used mainly for determination of mobility and local concentration of molecules. This review describes the specific problems of FCS in planar systems and reviews the state of the art experimental approaches such as 2-focus, Z-scan or scanning FCS, which overcome most of the artefacts and limitations of standard FCS. We focus on diffusion measurements of lipids and proteins in planar lipid membranes and review the contributions of FCS to elucidating membrane dynamics and the factors influencing it, such as membrane composition, ionic strength, presence of membrane proteins or frictional coupling with solid support.
Collapse
Affiliation(s)
- Radek Macháň
- J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i., Dolejškova 2155/3, 182 23 Prague, Czech Republic; E-Mail:
| | - Martin Hof
- J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i., Dolejškova 2155/3, 182 23 Prague, Czech Republic; E-Mail:
| |
Collapse
|
72
|
García-Sáez AJ, Carrer DC, Schwille P. Fluorescence correlation spectroscopy for the study of membrane dynamics and organization in giant unilamellar vesicles. Methods Mol Biol 2010; 606:493-508. [PMID: 20013417 DOI: 10.1007/978-1-60761-447-0_33] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Fluorescence correlation spectroscopy (FCS) is a powerful technique to study the lateral organization of membranes. It measures fluorescence intensity fluctuations in the single molecule regime and allows the determination of diffusion coefficients. When applied to lipid membranes, their fluidity and lipid phase can be estimated from the diffusion rates of fluorescent particles partitioned to the membrane. Here, we describe the theoretical basis of FCS and discuss the z-scan approach for measurements on lipid membranes. We also list the materials necessary for a FCS experiment on giant unilamellar vesicles (GUVs). Finally, we present simple protocols for the preparation of GUVs and the acquisition and analysis of FCS data on the vesicles, so that diffusion coefficients of fluorescent probes within lipid membranes can be estimated.
Collapse
|
73
|
Kriegsmann J, Gregor I, von der Hocht I, Klare J, Engelhard M, Enderlein J, Fitter J. Translational diffusion and interaction of a photoreceptor and its cognate transducer observed in giant unilamellar vesicles by using dual-focus FCS. Chembiochem 2009; 10:1823-9. [PMID: 19551796 DOI: 10.1002/cbic.200900251] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In order to monitor membrane-protein binding in lipid bilayers at physiological protein concentrations, we employed the recently developed dual-focus fluorescence correlation spectroscopy (2fFCS) technique. In a case study on a photoreceptor consisting of seven transmembrane helices and its cognate transducer (two transmembrane helices), the lateral diffusion for these integral membrane proteins was analyzed in giant unilamellar vesicles (GUVs). The two-dimensional diffusion coefficients of both separately diffusing proteins differ significantly, with D = 2.2 x 10(-8) cm2 s(-1) for the photoreceptor and with D = 4.1 x 10(-8) cm2 s(-1) for the transducer. In GUVs with both membrane proteins present together, we observed significantly smaller diffusion coefficients for labelled transducer molecules; this indicates the presence of larger diffusing units and therefore intermolecular protein binding. Based on the phenomenological dependence of diffusion coefficients on the molecule's cylindrical radius, we are able to estimate the degree of membrane protein binding on a quantitative level.
Collapse
Affiliation(s)
- Jana Kriegsmann
- Research Centre Jülich, ISB 2: Molecular Biophysics, 52425 Jülich, Germany
| | | | | | | | | | | | | |
Collapse
|
74
|
Reznik C, Estillore N, Advincula RC, Landes CF. Single Molecule Spectroscopy Reveals Heterogeneous Transport Mechanisms for Molecular Ions in a Polyelectrolyte Polymer Brush. J Phys Chem B 2009; 113:14611-8. [DOI: 10.1021/jp906487j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carmen Reznik
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | - Nicel Estillore
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | | | - Christy F. Landes
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| |
Collapse
|
75
|
Thompson NL, Wang X, Navaratnarajah P. Total internal reflection with fluorescence correlation spectroscopy: Applications to substrate-supported planar membranes. J Struct Biol 2009; 168:95-106. [PMID: 19269331 PMCID: PMC2785550 DOI: 10.1016/j.jsb.2009.02.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Revised: 02/24/2009] [Accepted: 02/25/2009] [Indexed: 10/21/2022]
Abstract
In this paper, the conceptual basis and experimental design of total internal reflection with fluorescence correlation spectroscopy (TIR-FCS) is described. The few applications to date of TIR-FCS to supported membranes are discussed, in addition to a variety of applications not directly involving supported membranes. Methods related, but not technically equivalent, to TIR-FCS are also summarized. Future directions for TIR-FCS are outlined.
Collapse
Affiliation(s)
- Nancy L Thompson
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599-3290, USA.
| | | | | |
Collapse
|
76
|
Schleifenbaum F, Blum C, Subramaniam V, Meixner AJ. Single-molecule spectral dynamics at room temperature. Mol Phys 2009. [DOI: 10.1080/00268970802635004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
77
|
Ries J, Yu SR, Burkhardt M, Brand M, Schwille P. Modular scanning FCS quantifies receptor-ligand interactions in living multicellular organisms. Nat Methods 2009; 6:643-5. [DOI: 10.1038/nmeth.1355] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Accepted: 06/09/2009] [Indexed: 11/09/2022]
|
78
|
Michelman-Ribeiro A, Mazza D, Rosales T, Stasevich TJ, Boukari H, Rishi V, Vinson C, Knutson JR, McNally JG. Direct measurement of association and dissociation rates of DNA binding in live cells by fluorescence correlation spectroscopy. Biophys J 2009; 97:337-46. [PMID: 19580772 PMCID: PMC2711375 DOI: 10.1016/j.bpj.2009.04.027] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 04/07/2009] [Accepted: 04/22/2009] [Indexed: 10/20/2022] Open
Abstract
Measurement of live-cell binding interactions is vital for understanding the biochemical reactions that drive cellular processes. Here, we develop, characterize, and apply a new procedure to extract information about binding to an immobile substrate from fluorescence correlation spectroscopy (FCS) autocorrelation data. We show that existing methods for analyzing such data by two-component diffusion fits can produce inaccurate estimates of diffusion constants and bound fractions, or even fail altogether to fit FCS binding data. By analyzing live-cell FCS measurements, we show that our new model can satisfactorily account for the binding interactions introduced by attaching a DNA binding domain to the dimerization domain derived from a site-specific transcription factor (the vitellogenin binding protein (VBP)). We find that our FCS estimates are quantitatively consistent with our fluorescence recovery after photobleaching (FRAP) measurements on the same VBP domains. However, due to the fast binding interactions introduced by the DNA binding domain, FCS generates independent estimates for the diffusion constant (6.7 +/- 2.4 microm2/s) and the association (2 +/- 1.2 s(-1)) and dissociation (19 +/- 7 s(-1)) rates, whereas FRAP produces only a single, but a consistent, estimate, the effective-diffusion constant (4.4 +/- 1.4 microm2/s), which depends on all three parameters. We apply this new FCS method to evaluate the efficacy of a potential anticancer drug that inhibits DNA binding of VBP in vitro and find that in vivo the drug inhibits DNA binding in only a subset of cells. In sum, we provide a straightforward approach to directly measure binding rates from FCS data.
Collapse
Affiliation(s)
- Ariel Michelman-Ribeiro
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Davide Mazza
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Tilman Rosales
- Laboratory of Molecular Biophysics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland
| | - Timothy J. Stasevich
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Hacene Boukari
- Laboratory of Cell Biophysics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Vikas Rishi
- Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Charles Vinson
- Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Jay R. Knutson
- Laboratory of Molecular Biophysics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland
| | - James G. McNally
- Laboratory of Receptor Biology and Gene Expression, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| |
Collapse
|
79
|
Ariola FS, Li Z, Cornejo C, Bittman R, Heikal AA. Membrane fluidity and lipid order in ternary giant unilamellar vesicles using a new bodipy-cholesterol derivative. Biophys J 2009; 96:2696-708. [PMID: 19348752 DOI: 10.1016/j.bpj.2008.12.3922] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2008] [Revised: 12/11/2008] [Accepted: 12/17/2008] [Indexed: 11/24/2022] Open
Abstract
Cholesterol-rich, liquid-ordered (L(o)) domains are believed to be biologically relevant, and yet detailed knowledge about them, especially in live cells under physiological conditions, is elusive. Although these domains have been observed in model membranes, understanding cholesterol-lipid interactions at the molecular level, under controlled lipid mixing, remains a challenge. Further, although there are a number of fluorescent lipid analogs that partition into liquid-disordered (L(d)) domains, the number of such analogs with a high affinity for biologically relevant L(o) domains is limited. Here, we use a new Bodipy-labeled cholesterol (Bdp-Chol) derivative to investigate membrane fluidity, lipid order, and partitioning in various lipid phases in giant unilamellar vesicles (GUVs) as a model system. GUVs were prepared from mixtures of various molar fractions of dioleoylphosphatidylcholine, cholesterol, and egg sphingomyelin. The L(d) phase domains were also labeled with 1,1'-didodecyl-3,3,3',3'-tetramethylindocarbocyanine (DiI-C(12)) for comparison. Two-photon fluorescence lifetime and anisotropy imaging of Bdp-Chol are sensitive to lipid phase domains in GUVs. The fluorescence lifetime of Bdp-Chol in liquid-disordered, single-phase GUVs is 5.50 +/- 0.08 ns, compared with 4.1 +/- 0.4 ns in the presence of DiI-C(12). The observed reduction of fluorescence lifetime is attributed to Förster resonance energy transfer between Bdp-Chol (a donor) and DiI-C(12) (an acceptor) with an estimated efficiency of 0.25 and donor-acceptor distance of 2.6 +/- 0.2 nm. These results also indicate preferential partitioning (K(p) = 1.88) of Bdp-Chol into the L(o) phase. One-photon, time-resolved fluorescence anisotropy of Bdp-Chol decays as a triexponential in the lipid bilayer with an average rotational diffusion coefficient, lipid order parameter, and membrane fluidity that are sensitive to phase domains. The translational diffusion coefficient of Bdp-Chol, as measured using fluorescence correlation spectroscopy, is (7.4 +/- 0.3) x 10(-8) cm(2)/s and (5.0 +/- 0.2) x 10(-8) cm(2)/s in the L(d) and L(o) phases, respectively. Experimental translational/rotational diffusion coefficient ratios are compared with theoretical predictions using the hydrodynamic model (Saffman-Delbrück). The results suggest that Bdp-Chol is likely to form a complex with other lipid molecules during its macroscopic diffusion in GUV lipid bilayers at room temperature. Our integrated, multiscale results demonstrate the potential of this cholesterol analog for studying lipid-lipid interactions, lipid order, and membrane fluidity of biologically relevant L(o) domains.
Collapse
Affiliation(s)
- Florly S Ariola
- Department of Bioengineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | | | | | | | | |
Collapse
|
80
|
Kam LC. Capturing the nanoscale complexity of cellular membranes in supported lipid bilayers. J Struct Biol 2009; 168:3-10. [PMID: 19500676 DOI: 10.1016/j.jsb.2009.05.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 05/24/2009] [Accepted: 05/27/2009] [Indexed: 11/28/2022]
Abstract
The lateral mobility of cell membranes plays an important role in cell signaling, governing the rate at which embedded proteins can interact with other biomolecules. The past two decades have seen a dramatic transformation in understanding of this environment, as the mechanisms and potential implications of nanoscale structure of these systems has become accessible to theoretical and experimental investigation. In particular, emerging micro- and nano-scale fabrication techniques have made possible the direct manipulation of model membranes at the scales relevant to these biological processes. This review focuses on recent advances in nanopatterning of supported lipid bilayers, capturing the impact of membrane nanostructure on molecular diffusion and providing a powerful platform for further investigation of the role of this spatial complexity on cell signaling.
Collapse
Affiliation(s)
- Lance C Kam
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA.
| |
Collapse
|
81
|
Elgass K, Caesar K, Schleifenbaum F, Stierhof YD, Meixner AJ, Harter K. Novel application of fluorescence lifetime and fluorescence microscopy enables quantitative access to subcellular dynamics in plant cells. PLoS One 2009; 4:e5716. [PMID: 19492078 PMCID: PMC2683565 DOI: 10.1371/journal.pone.0005716] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Accepted: 04/30/2009] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Optical and spectroscopic technologies working at subcellular resolution with quantitative output are required for a deeper understanding of molecular processes and mechanisms in living cells. Such technologies are prerequisite for the realisation of predictive biology at cellular and subcellular level. However, although established in the physical sciences, these techniques are rarely applied to cell biology in the plant sciences. PRINCIPAL FINDINGS Here, we present a combined application of one-chromophore fluorescence lifetime microscopy and wavelength-selective fluorescence microscopy to analyse the function of a GFP fusion of the Brassinosteroid Insensitive 1 Receptor (BRI1-GFP) with high spatial and temporal resolution in living Arabidopsis cells in their tissue environment. We show a rapid, brassinolide-induced cell wall expansion and a fast BR-regulated change in the BRI1-GFP fluorescence lifetime in the plasmamembrane in vivo. Both cell wall expansion and changes in fluorescence lifetime reflect early BR-induced and BRI1-dependent physiological or signalling processes. Our experiments also show the potential of one-chromophore fluorescence lifetime microscopy for the in vivo monitoring of the biochemical and biophysical subcellular environment using GFP fusion proteins as probes. SIGNIFICANCE One-chromophore fluorescence lifetime microscopy, combined with wavelength-specific fluorescence microscopy, opens up new frontiers for in vivo dynamic and quantitative analysis of cellular processes at high resolution which are not addressable by pure imaging technologies or transmission electron microscopy.
Collapse
Affiliation(s)
- Kirstin Elgass
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen, Germany
| | - Katharina Caesar
- Center for Plant Molecular Biology, Department of Plant Physiology, University of Tübingen, Tübingen, Germany
| | - Frank Schleifenbaum
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen, Germany
- Center for Plant Molecular Biology, Department of Plant Physiology, University of Tübingen, Tübingen, Germany
| | - York-Dieter Stierhof
- Center for Plant Molecular Biology, Microscopy, University of Tübingen, Tübingen, Germany
| | - Alfred J. Meixner
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen, Germany
- * E-mail: (AJM); (KH)
| | - Klaus Harter
- Center for Plant Molecular Biology, Department of Plant Physiology, University of Tübingen, Tübingen, Germany
- * E-mail: (AJM); (KH)
| |
Collapse
|
82
|
Ries J, Chiantia S, Schwille P. Accurate determination of membrane dynamics with line-scan FCS. Biophys J 2009; 96:1999-2008. [PMID: 19254560 DOI: 10.1016/j.bpj.2008.12.3888] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Accepted: 12/03/2008] [Indexed: 11/28/2022] Open
Abstract
Here we present an efficient implementation of line-scan fluorescence correlation spectroscopy (i.e., one-dimensional spatio-temporal image correlation spectroscopy) using a commercial laser scanning microscope, which allows the accurate measurement of diffusion coefficients and concentrations in biological lipid membranes within seconds. Line-scan fluorescence correlation spectroscopy is a calibration-free technique. Therefore, it is insensitive to optical artifacts, saturation, or incorrect positioning of the laser focus. In addition, it is virtually unaffected by photobleaching. Correction schemes for residual inhomogeneities and depletion of fluorophores due to photobleaching extend the applicability of line-scan fluorescence correlation spectroscopy to more demanding systems. This technique enabled us to measure accurate diffusion coefficients and partition coefficients of fluorescent lipids in phase-separating supported bilayers of three commonly used raft-mimicking compositions. Furthermore, we probed the temperature dependence of the diffusion coefficient in several model membranes, and in human embryonic kidney cell membranes not affected by temperature-induced optical aberrations.
Collapse
Affiliation(s)
- Jonas Ries
- Technical University of Dresden, Biotechnologisches Zentrum, Dresden, Germany
| | | | | |
Collapse
|
83
|
Owen DM, Williamson D, Rentero C, Gaus K. Quantitative microscopy: protein dynamics and membrane organisation. Traffic 2009; 10:962-71. [PMID: 19416480 DOI: 10.1111/j.1600-0854.2009.00908.x] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The mobility of membrane proteins is a critical determinant of their interaction capabilities and protein functions. The heterogeneity of cell membranes imparts different types of motion onto proteins; immobility, random Brownian motion, anomalous sub-diffusion, 'hop' or confined diffusion, or directed flow. Quantifying the motion of proteins therefore enables insights into the lateral organisation of cell membranes, particularly membrane microdomains with high viscosity such as lipid rafts. In this review, we examine the hypotheses and findings of three main techniques for analysing protein dynamics: fluorescence recovery after photobleaching, single particle tracking and fluorescence correlation spectroscopy. These techniques, and the physical models employed in data analysis, have become increasingly sophisticated and provide unprecedented details of the biophysical properties of protein dynamics and membrane domains in cell membranes. Yet despite these advances, there remain significant unknowns in the relationships between cholesterol-dependent lipid microdomains, protein-protein interactions, and the effect of the underlying cytoskeleton. New multi-dimensional microscopy approaches may afford greater temporal and spatial resolution resulting in more accurate quantification of protein and membrane dynamics in live cells.
Collapse
Affiliation(s)
- Dylan M Owen
- Centre for Vascular Research, University of New South Wales, and the Department of Haematology, Prince of Wales Hospital, Sydney, Australia
| | | | | | | |
Collapse
|
84
|
Weidtkamp-Peters S, Felekyan S, Bleckmann A, Simon R, Becker W, Kühnemuth R, Seidel CAM. Multiparameter fluorescence image spectroscopy to study molecular interactions. Photochem Photobiol Sci 2009; 8:470-80. [PMID: 19337660 DOI: 10.1039/b903245m] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiparameter Fluorescence Image Spectroscopy (MFIS) is used to monitor simultaneously a variety of fluorescence parameters in confocal fluorescence microscopy. As the photons are registered one by one, MFIS allows for fully parallel recording of Fluorescence Correlation/Cross Correlation Spectroscopy (FCS/FCCS), fluorescence lifetime and pixel/image information over time periods of hours with picosecond accuracy. The analysis of the pixel fluorescence information in higher-dimensional histograms maximizes the selectivity of fluorescence microscopic methods. Moreover it facilitates a statistically-relevant data analysis of the pixel information which makes an efficient detection of heterogeneities possible. The reliability of MFIS has been demonstrated for molecular interaction studies in different complex environments: (I) detecting the heterogeneity of diffusion properties of the dye Rhodamine 110 in a sepharose bead, (II) Förster Resonance Energy Transfer (FRET) studies in mammalian HEK293 cells, and (III) FRET study of the homodimerisation of the transcription factor BIM1 in plant cells. The multidimensional analysis of correlated changes of several parameters measured by FRET, FCS, fluorescence lifetime and anisotropy increases the robustness of the analysis significantly. The economic use of photon information allows one to keep the expression levels of fluorescent protein-fusion proteins as low as possible (down to the single-molecule level).
Collapse
Affiliation(s)
- Stefanie Weidtkamp-Peters
- Lehrstuhl für Molekulare Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany.
| | | | | | | | | | | | | |
Collapse
|
85
|
Wells NP, Lessard GA, Phipps ME, Goodwin PM, Lidke DS, Wilson BS, Werner JH. Going beyond 2D: Following membrane diffusion and topography in the IgE-Fc[Epsilon]RI system using 3-dimensional tracking microscopy. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2009; 7185:71850Z. [PMID: 25520545 DOI: 10.1117/12.809412] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The ability to follow and observe single molecules as they function in live cells represents a major milestone for molecular-cellular biology. Here we present a tracking microscope that is able to track quantum dots in three dimensions and simultaneously record time-resolved emission statistics from a single dot. This innovative microscopy approach is based on four spatial filters and closed loop feedback to constantly keep a single quantum dot in the focal spot. Using this microscope, we demonstrate the ability to follow quantum dot labeled IgE antibodies bound to FcεRI membrane receptors in live RBL-2H3 cells. The results are consistent with prior studies of two dimensional membrane diffusion (Andrews et al., Nat. Cell Biol., 10, 955, 2008). In addition, the microscope captures motion in the axial (Z) direction, which permits tracking of diffusing receptors relative to the "hills and valleys" of the dynamically changing membrane landscape. This approach is uniquely capable of following single molecule dynamics on live cells with three dimensional spatial resolution.
Collapse
Affiliation(s)
- Nathan P Wells
- Los Alamos National Laboratory (MPA-CINT), Los Alamos, New Mexico 87545 USA
| | | | - Mary E Phipps
- Los Alamos National Laboratory (MPA-CINT), Los Alamos, New Mexico 87545 USA
| | - Peter M Goodwin
- Los Alamos National Laboratory (MPA-CINT), Los Alamos, New Mexico 87545 USA
| | - Diane S Lidke
- University of New Mexico, Department of Pathology and Cancer Research and Treatment Center, Albuquerque, New Mexico 87175 USA
| | - Bridget S Wilson
- University of New Mexico, Department of Pathology and Cancer Research and Treatment Center, Albuquerque, New Mexico 87175 USA
| | - James H Werner
- Los Alamos National Laboratory (MPA-CINT), Los Alamos, New Mexico 87545 USA
| |
Collapse
|
86
|
Fluorescence correlation spectroscopy in membrane structure elucidation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2009; 1788:225-33. [DOI: 10.1016/j.bbamem.2008.08.013] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 08/12/2008] [Accepted: 08/21/2008] [Indexed: 11/18/2022]
|
87
|
|
88
|
Fluorescence correlation spectroscopy for the study of membrane dynamics and protein/lipid interactions. Methods 2008; 46:116-22. [PMID: 18634881 DOI: 10.1016/j.ymeth.2008.06.011] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Revised: 05/27/2008] [Accepted: 06/05/2008] [Indexed: 11/22/2022] Open
Abstract
Fluorescence correlation spectroscopy (FCS) is a powerful technique to study dynamic biomolecular processes. It allows the estimation of concentrations, diffusion coefficients, molecular interactions, and other processes causing fluctuations in the fluorescence intensity, thus yielding information about aggregation processes, enzymatic reactions, or partition coefficients. During the last years, FCS has been successfully applied to model and cellular membranes, proving to be a promising tool for the study of membrane dynamics and protein/lipid interactions. Here we describe the theoretical basis of FCS and some practical implications for its application in membrane studies. We discuss sources of potential artifacts, such as membrane undulations, positioning of the detection volume, and photobleaching. Special attention is paid to aspects related to instrumentation and sample preparation as well as data acquisition and analysis. Finally, we comment on some strategies recently developed for the specific improvement of FCS measurements on membranes.
Collapse
|