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Andreoni A, Nardo L, Rigler R. Time-resolved homo-FRET studies of biotin-streptavidin complexes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:656-662. [PMID: 27494295 DOI: 10.1016/j.jphotobiol.2016.07.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 07/27/2016] [Indexed: 11/25/2022]
Abstract
Förster resonance energy transfer is a mechanism of fluorescence quenching that is notably useful for characterizing properties of biomolecules and/or their interactions. Here we study water-solutions of Biotin-Streptavidin complexes, in which Biotin is labeled with a rigidly-bound fluorophore that can interact by Förster resonance energy transfer with the fluorophores labeling the other, up to three, Biotins of the same complex. The fluorophore, Atto550, is a Rhodamine analogue. We detect the time-resolved fluorescence decay of the fluorophores with an apparatus endowed with single-photon sensitivity and temporal resolution of ~30ps. The decay profiles we observe for samples containing constant Biotin-Atto550 conjugates and varying Streptavidin concentrations are multi-exponential. Each decay component can be associated with the rate of quenching exerted on each donor by each of the acceptors that label the other Biotin molecules, depending on the binding site they occupy. The main features that lead to this result are that (i) the transition dipole moments of the up-to-four Atto550 fluorophores that label the complexes are fixed as to both relative positions and mutual orientations; (ii) the fluorophores are identical and the role of donor in each Biotin-Streptavidin complex is randomly attributed to the one that has absorbed the excitation light (homo-FRET). Obviously the high-temporal resolution of the excitation-detection apparatus is necessary to discriminate among the fluorescence decay components.
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Affiliation(s)
- Alessandra Andreoni
- Department of Science and High Technology, University of Insubria, Como 22100, Italy.
| | - Luca Nardo
- Department of Science and High Technology, University of Insubria, Como 22100, Italy.
| | - Rudolf Rigler
- Department of Medical Biophysics, Karolinska Institutet, 17 177 Stockholm, Sweden; Laboratory of Biomedical Optics, Swiss Federal Institute of Technology, 1015 Lausanne, Switzerland.
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2
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Aitken BS, Wieruszewski PM, Graham KR, Reynolds JR, Wagener KB. Perfectly Regioregular Electroactive Polyolefins: Impact of Inter-Chromophore Distance on PLED EQE. Macromolecules 2012. [DOI: 10.1021/ma202409k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brian S. Aitken
- The George and Josephine
Butler Polymer Research Laboratory,
Department of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200,
United States
| | - Patrick M. Wieruszewski
- The George and Josephine
Butler Polymer Research Laboratory,
Department of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200,
United States
| | - Kenneth R. Graham
- The George and Josephine
Butler Polymer Research Laboratory,
Department of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200,
United States
| | - John R. Reynolds
- The George and Josephine
Butler Polymer Research Laboratory,
Department of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200,
United States
| | - Kenneth B. Wagener
- The George and Josephine
Butler Polymer Research Laboratory,
Department of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200,
United States
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3
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Designed fluorescent probes reveal interactions between amyloid-beta(1-40) peptides and GM1 gangliosides in micelles and lipid vesicles. Biophys J 2010; 99:1510-9. [PMID: 20816063 DOI: 10.1016/j.bpj.2010.06.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 06/16/2010] [Accepted: 06/17/2010] [Indexed: 12/20/2022] Open
Abstract
A hallmark of the common Alzheimer's disease (AD) is the pathological conversion of its amphiphatic amyloid-beta (Abeta) peptide into neurotoxic aggregates. In AD patients, these aggregates are often found to be tightly associated with neuronal G(M1) ganglioside lipids, suggesting an involvement of G(M1) not only in aggregate formation but also in neurotoxic events. Significant interactions were found between micelles made of newly synthesized fluorescent G(M1) gangliosides labeled in the polar headgroup or the hydrophobic chain and Abeta(1-40) peptide labeled with a BODIPY-FL-C1 fluorophore at positions 12 and 26, respectively. From an analysis of energy transfer between the different fluorescence labels and their location in the molecules, we were able to place the Abeta peptide inside G(M1) micelles, close to the hydrophobic-hydrophilic interface. Large unilamellar vesicles composed of a raftlike G(M1)/bSM/cholesterol lipid composition doped with labeled G(M1) at various positions also interact with labeled Abeta peptide tagged to amino acids 2 or 26. A faster energy transfer was observed from the Abeta peptide to bilayers doped with 581/591-BODIPY-C(11)-G(M1) in the nonpolar part of the lipid compared with 581/591-BODIPY-C(5)-G(M1) residing in the polar headgroup. These data are compatible with a clustering process of G(M1) molecules, an effect that not only increases the Abeta peptide affinity, but also causes a pronounced Abeta peptide penetration deeper into the lipid membrane; all these factors are potentially involved in Abeta peptide aggregate formation due to an altered ganglioside metabolism found in AD patients.
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Opanasyuk O, Johansson LBÅ. Extended Förster theory: a quantitative approach to the determination of inter-chromophore distances in biomacromolecules. Phys Chem Chem Phys 2010; 12:7758-67. [DOI: 10.1039/b924113b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Norlin N, Westlund PO, Johansson LBÅ. Fluorescence Spectroscopic Properties Analysed within the Extended Förster Theory with Application to Biomacromolecular Systems. J Fluoresc 2009; 19:837-45. [DOI: 10.1007/s10895-009-0481-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Accepted: 03/27/2009] [Indexed: 11/29/2022]
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Norlin N, Håkansson P, Westlund PO, Johansson LBÅ. Extended Förster theory for determining intraprotein distances : Part III. Partial donor–donor energy migration among reorienting fluorophores. Phys Chem Chem Phys 2008; 10:6962-70. [DOI: 10.1039/b810661d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Olofsson M, Kalinin S, Zdunek J, Oliveberg M, Johansson LBA. Tryptophan-BODIPY: a versatile donor-acceptor pair for probing generic changes of intraprotein distances. Phys Chem Chem Phys 2006; 8:3130-40. [PMID: 16804615 DOI: 10.1039/b601313a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate that Tryptophan (Trp) and N-(4,4-difluoro-5,7-dimethyl-4-bora-3a,4a-diaza-s-indacene-3-yl)methyl iodoacetamide (BODIPY) is a suitable donor-acceptor (D-A) pair for intraprotein distance measurements, applicable to the study of protein folding. The suitability of the Trp-BODIPY electronic energy transfer is exemplified on the extensively-characterised two-state protein, S6, from Thermus thermophilus. This protein has proved to be useful for the elucidation of folding cooperativity and nucleation, as well as the changes upon induction of structural transitions. For a comprehensive structural coverage, BODIPY molecules were anchored by Cys insertions at four different positions on the S6 surface. Trp residues at position 33 or 62 acted as donors of electronic energy to the BODIPY groups. None of the D-A pairs show any detectable difference in the folding kinetics (or protein stability), which supports the notion that the two-state transition of S6 is a highly concerted process. Similar results are obtained for mutants affecting the N- and C-terminus. The kinetic analyses indicate that changes of the transition state occur through local unfolding of the native state, rather than by a decrease of the folding cooperativity. The distances obtained from the analysis of the time-resolved fluorescence experiments in the native state were compared to those calculated from X-ray structure. As an additional measure, molecular dynamics simulations of the different protein constructs were performed to account for variability in the BODIPY location on the protein surface. The agreement between fluorescence and X-ray data is quite convincing, and shows that energy transfer measurements between Trp and BODIPY can probe distances between ca. 17 to 34 A, with an error better than 10%.
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Affiliation(s)
- Maria Olofsson
- Biophysical Chemistry and Biochemistry, Department of Chemistry, Umeå University, S-901 87 Umeå, Sweden
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Boldyrev IA, Molotkovskiĭ IG. [A synthesis of new rigid fluorescent bichromophoric probes for studying mechanisms of donor-donor energy migration]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2005; 31:331-4. [PMID: 16004393 DOI: 10.1007/s11171-005-0041-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Three new fluorescent probes were synthesized for improving the method of studying donor-donor energy migration (DDEM). Each probe has two identical fluorescent 7-diethylaminocoumarin-3-carbonyl groups attached to a rigid bisteroid dodecacyclic spacer through additional inserts. In two probes, the inserts are beta-Ala and L-Ser residues, which provide for a different nearest environment of the fluorophores. The third probe has identical beta-Ala inserts. The English version of the paper: Russian Journal of Bioorganic Chemistry, 2005, vol. 31, no. 3; see also http://www.maik.ru.
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Kalinin S, Johansson LBA. Utility and considerations of donor-donor energy migration as a fluorescence method for exploring protein structure-function. J Fluoresc 2005; 14:681-91. [PMID: 15649020 DOI: 10.1023/b:jofl.0000047218.51768.59] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This review aims at surveying the use of electronic energy transport between chemically identical fluorophores (i.e. donors) in studies of various protein systems. Applications of intra- and interprotein energy migration are presented that make use of polarised steady-state and time-resolved fluorescence spectroscopic techniques. The donor-donor energy migration (DDEM) and the partial donor-donor energy migration (PDDEM) models for calculating distances between donor groups are exposed together with the most recent development of an extended Forster theory (EFT). Synthetic fluorescence depolarisation data that mimic time-correlated single photon counting experiments were generated using the EFT, and then further re-analysed by the different models. The results obtained were compared with the known parameters used to generate EFT data. Aspects on how to adopt the EFT in the analyses of time-correlated single photon counting experiments are also presented, as well as future aspects on using energy migration for examining protein structure.
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Affiliation(s)
- Stanislav Kalinin
- Department of Chemistry, Biophysical Chemistry, University of Umeå, S-901 87 Umeå, Sweden
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Powe AM, Fletcher KA, St Luce NN, Lowry M, Neal S, McCarroll ME, Oldham PB, McGown LB, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2004; 76:4614-34. [PMID: 15307770 DOI: 10.1021/ac040095d] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Aleeta M Powe
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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Kalinin S, Johansson LBÅ. Energy Migration and Transfer Rates Are Invariant to Modeling the Fluorescence Relaxation by Discrete and Continuous Distributions of Lifetimes. J Phys Chem B 2004. [DOI: 10.1021/jp031096x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Isaksson M, Kalinin S, Lobov S, Wang S, Ny T, Johansson LBÅ. Partial donor–donor energy migration (PDDEM): A novel fluorescence method for internal protein distance measurements. Phys Chem Chem Phys 2004. [DOI: 10.1039/b403264k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Kalinin S, Molotkovsky JG, Johansson LBÅ. Distance Measurements Using Partial Donor−Donor Energy Migration within Pairs of Fluorescent Groups in Lipid Bilayers. J Phys Chem B 2003. [DOI: 10.1021/jp022672c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stanislav Kalinin
- Department of Chemistry, Biophysical Chemistry, Umeå University, S-901 87 Umeå, Sweden, and Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117988 Moscow, Russia
| | - Julian G. Molotkovsky
- Department of Chemistry, Biophysical Chemistry, Umeå University, S-901 87 Umeå, Sweden, and Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117988 Moscow, Russia
| | - Lennart B.-Å. Johansson
- Department of Chemistry, Biophysical Chemistry, Umeå University, S-901 87 Umeå, Sweden, and Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117988 Moscow, Russia
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