1
|
Tutkus M, Akhtar P, Chmeliov J, Görföl F, Trinkunas G, Lambrev PH, Valkunas L. Fluorescence Microscopy of Single Liposomes with Incorporated Pigment-Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14410-14418. [PMID: 30380887 DOI: 10.1021/acs.langmuir.8b02307] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Reconstitution of transmembrane proteins into liposomes is a widely used method to study their behavior under conditions closely resembling the natural ones. However, this approach does not allow precise control of the liposome size, reconstitution efficiency, and the actual protein-to-lipid ratio in the formed proteoliposomes, which might be critical for some applications and/or interpretation of data acquired during the spectroscopic measurements. Here, we present a novel strategy employing methods of proteoliposome preparation, fluorescent labeling, purification, and surface immobilization that allow us to quantify these properties using fluorescence microscopy at the single-liposome level and for the first time apply it to study photosynthetic pigment-protein complexes LHCII. We show that LHCII proteoliposome samples, even after purification with a density gradient, always contain a fraction of nonreconstituted protein and are extremely heterogeneous in both protein density and liposome sizes. This strategy enables quantitative analysis of the reconstitution efficiency of different protocols and precise fluorescence spectroscopic study of various transmembrane proteins in a controlled nativelike environment.
Collapse
Affiliation(s)
- Marijonas Tutkus
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
| | - Parveen Akhtar
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Jevgenij Chmeliov
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
- Institute of Chemical Physics, Faculty of Physics , Vilnius University , Saulėtekio Avenue 9-III , LT-10222 Vilnius , Lithuania
| | - Fanni Görföl
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Gediminas Trinkunas
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
| | - Petar H Lambrev
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Leonas Valkunas
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
- Institute of Chemical Physics, Faculty of Physics , Vilnius University , Saulėtekio Avenue 9-III , LT-10222 Vilnius , Lithuania
| |
Collapse
|
2
|
Choi H, Chu HS, Chung M, Kim B, Won JI. Synthesis and characterization of an ELP-conjugated liposome with thermo-sensitivity for controlled release of a drug. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-016-0391-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
3
|
Natali A, Gruber JM, Dietzel L, Stuart MCA, van Grondelle R, Croce R. Light-harvesting Complexes (LHCs) Cluster Spontaneously in Membrane Environment Leading to Shortening of Their Excited State Lifetimes. J Biol Chem 2016; 291:16730-9. [PMID: 27252376 DOI: 10.1074/jbc.m116.730101] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Indexed: 11/06/2022] Open
Abstract
The light reactions of photosynthesis, which include light-harvesting and charge separation, take place in the amphiphilic environment of the thylakoid membrane. The light-harvesting complex II (LHCII) is the main responsible for light absorption in plants and green algae and is involved in photoprotective mechanisms that regulate the amount of excited states in the membrane. The dual function of LHCII has been extensively studied in detergent micelles, but recent results have indicated that the properties of this complex differ in a lipid environment. In this work we checked these suggestions by studying LHCII in liposomes. By combining bulk and single molecule measurements, we monitored the fluorescence characteristics of liposomes containing single complexes up to densely packed proteoliposomes. We show that the natural lipid environment per se does not alter the properties of LHCII, which for single complexes remain very similar to that in detergent. However, we show that LHCII has the strong tendency to cluster in the membrane and that protein interactions and the extent of crowding modulate the lifetimes of the excited state in the membrane. Finally, the presence of LHCII monomers at low concentrations of complexes per liposome is discussed.
Collapse
Affiliation(s)
- Alberto Natali
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - J Michael Gruber
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Lars Dietzel
- Institute of Molecular Biosciences, Goethe-University Frankfurt/M, 60438 Frankfurt, Germany, and
| | - Marc C A Stuart
- Electron Microscopy, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Rienk van Grondelle
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Roberta Croce
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands,
| |
Collapse
|
4
|
Carotenoid binding to proteins: Modeling pigment transport to lipid membranes. Arch Biochem Biophys 2015; 584:125-33. [DOI: 10.1016/j.abb.2015.09.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 08/25/2015] [Accepted: 09/02/2015] [Indexed: 11/23/2022]
|
5
|
Tsiavos T, Ioannidis NE, Tsortos A, Gizeli E, Kotzabasis K. Spermine is a potent modulator of proton transport through LHCII. JOURNAL OF PLANT PHYSIOLOGY 2015; 177:44-50. [PMID: 25659334 DOI: 10.1016/j.jplph.2015.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Revised: 01/18/2015] [Accepted: 01/20/2015] [Indexed: 06/04/2023]
Abstract
The effect of spermine on proton transport across large unilamellar liposomes containing incorporated complexes of the PSII antenna has been studied with the application of a pH-sensitive dye entrapped inside the vesicles. Both monomeric LHCbs and trimeric LHCII increased the permeability of proteoliposomes to protons when in a partly aggregated state within the lipid membrane. We have previously shown that a spermine-induced conformational change in LHCII results in its aggregation and ultimately in the enhancement of excitation energy as heat (qE). In this paper, spermine-induced aggregation of LHCII was found to facilitate proton transport across the proteoliposomes, indicating that a second protective mechanism (other than qE) might exist and might be regulated in vivo by polyamines when photosynthesis is saturated in excess light.
Collapse
Affiliation(s)
- Theodoros Tsiavos
- Department of Biology, University of Crete, Voutes University Campus, GR-70013 Heraklion, Crete, Greece
| | - Nikolaos E Ioannidis
- Department of Biology, University of Crete, Voutes University Campus, GR-70013 Heraklion, Crete, Greece
| | - Achilleas Tsortos
- Institute of Molecular Biology and Biotechnology, FORTH, GR-70013 Heraklion, Crete, Greece
| | - Electra Gizeli
- Department of Biology, University of Crete, Voutes University Campus, GR-70013 Heraklion, Crete, Greece; Institute of Molecular Biology and Biotechnology, FORTH, GR-70013 Heraklion, Crete, Greece
| | - Kiriakos Kotzabasis
- Department of Biology, University of Crete, Voutes University Campus, GR-70013 Heraklion, Crete, Greece.
| |
Collapse
|
6
|
Light induced transmembrane proton gradient in artificial lipid vesicles reconstituted with photosynthetic reaction centers. J Bioenerg Biomembr 2012; 44:373-84. [DOI: 10.1007/s10863-012-9435-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Accepted: 03/19/2012] [Indexed: 10/28/2022]
|
7
|
Zhou W, An X, Wang J, Shen W, Chen Z, Wang X. Characteristics, phase behavior and control release for copolymer–liposome with both pH and temperature sensitivities. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.12.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
8
|
Ioannidis NE, Sfichi-Duke L, Kotzabasis K. Polyamines stimulate non-photochemical quenching of chlorophyll a fluorescence in Scenedesmus obliquus. PHOTOSYNTHESIS RESEARCH 2011; 107:169-75. [PMID: 21302030 DOI: 10.1007/s11120-010-9617-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 12/22/2010] [Indexed: 05/03/2023]
Abstract
Polyamines (PAs) are small metabolites that are produced and oxidized in chloroplasts with an obscure mode of action. Recently, we showed that qE is stimulated by PAs in higher plants (Nicotiana tabacum) and in genetically modified plants with elevated thylakoid-associated PAs (Ioannidis and Kotzabasis Biochim Biophys Acta 1767:1371-1382, 2007; Ioannidis et al. Biochim Biophys Acta 1787:1215-1222, 2009). Here, we investigated further their quenching properties both in vivo in green algae and in vitro is isolated LHCII. In vivo spermine up-regulates NPQ in Scenedesums obliquus about 30%. In vitro putrescine--the obligatory metabolic precursor of PAs--has a marginal quenching effect, while spermidine and spermine exhibit strong quenching abilities in isolated LHCII up to 40%. Based on available 3D models of LHCII we report a special cavity of about 600 Å(3) and a near-by larger pocket in the trimeric LHCII that could be of importance for the stimulation of qE by amines.
Collapse
Affiliation(s)
- Nikolaos E Ioannidis
- Department of Biology, University of Crete, P.O. Box 2208, 71409 Heraklion, Crete, Greece
| | | | | |
Collapse
|
9
|
Kupisz K, Sujak A, Patyra M, Trebacz K, Gruszecki WI. Can membrane-bound carotenoid pigment zeaxanthin carry out a transmembrane proton transfer? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2334-40. [DOI: 10.1016/j.bbamem.2008.06.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 06/02/2008] [Accepted: 06/04/2008] [Indexed: 11/26/2022]
|
10
|
Hereć M, Dziubińska H, Trebacz K, Morzycki JW, Gruszecki WI. An effect of antibiotic amphotericin B on ion transport across model lipid membranes and tonoplast membranes. Biochem Pharmacol 2005; 70:668-75. [PMID: 16023082 DOI: 10.1016/j.bcp.2005.06.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Revised: 05/24/2005] [Accepted: 06/01/2005] [Indexed: 11/16/2022]
Abstract
A pH sensitive fluorescence probe piranine trisulfonate, entrapped inside small unilamellar liposomes formed with egg yolk phosphatidylcholine, was applied to investigate effect of polyene antibiotic amphotericin B (AmB) on proton transport across lipid membranes. Time dependencies of fluorescence-monitored pH changes inside lipid vesicles, upon sudden acidification of the liposome suspension, were analyzed in terms of two-exponential kinetics. It appears that addition of AmB at 3 mol%, with respect to lipid, considerably increases the rate constant of the fast component of proton transport (a change from (60 to 149) x 10(-3)s(-1)) and decreases the rate constant of the slow component (a change from (11 to 5) x 10(-3)s(-1)). Incorporation of 0.1 mol% AmB results in the decrease of both parameters (to (33 and 2) x 10(-3)s(-1), respectively). The increase in the rate of proton transfer across the lipid membrane is interpreted as related to the formation of membrane channels by AmB, at higher concentration of the drug or nonspecific destabilization of the membrane structure. At low concentrations, at which formation of molecular structures of AmB is not possible, the antibiotic molecules are oriented horizontally with respect to the plane of the membrane and act in making the membrane more compact and less permeable to ions. The presence of sterols (cholesterol, ergosterol and cholesterol dimer) in the lipid phase, in the concentration 3 mol% and lower, decreased the rate constants of proton transfer across the membranes but did not influence significantly the effect of AmB on the ion transport. The presence of AmB in the bathing solutions of tonoplast membranes isolated from Conocephalum conicum at the concentrations range 1 x 10(-7) to 3.6 x 10(-5) does not influence considerably the ion current, as monitored by means of the patch-clamp technique.
Collapse
Affiliation(s)
- Monika Hereć
- Department of Biophysics, Institute of Physics, Maria Curie-Skłodowska University, Pl. Marii Curie-Sklodowskiej 1, 20-031 Lublin, Poland
| | | | | | | | | |
Collapse
|
11
|
Niedzwiedzki D, Krupa Z, Gruszecki WI. Temperature-induced isomerization of violaxanthin in organic solvents and in light-harvesting complex II. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 78:109-14. [PMID: 15664497 DOI: 10.1016/j.jphotobiol.2004.09.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2004] [Revised: 09/29/2004] [Accepted: 09/29/2004] [Indexed: 11/28/2022]
Abstract
Three main xanthophyll pigments are bound to the major photosynthetic pigment-protein complex of Photosystem II (LHCII): lutein, neoxanthin and violaxanthin. Chromatographic analysis of the xanthophyll fraction of LHCII reveals that lutein appears mainly in the all-trans conformation, neoxanthin in the 9'-cis conformation and major fraction of violaxanthin in the all-trans conformation. Nevertheless, a small fraction of violaxanthin appears always in a cis conformation: 9-cis and 13-cis (approximately 4% and 2% in the darkness, respectively). Illumination of the isolated complex (5 min, 445 nm, 250 micromolm-2s-1) results in the substantial increase in the concentration of the cis steric conformers of violaxanthin: up to 6% of 9-cis and 4% of 13-cis. Similar effect can be obtained by dark incubation of the same preparation for 30 min at 60 degrees C. Heating-induced isomerization of the all-trans violaxanthin can also be obtained in the organic solvent system but the formation of the 9-cis stereoisomer has not been observed under such conditions. The fact that the appearance of the 9-cis form of violaxanthin is specific for the protein environment suggests that violaxanthin may replace neoxanthin in LHCII in the N1 xanthophyll binding pocket and that the protein stabilizes this particular conformation. The analysis of the electronic absorption spectra of LHCII and the FTIR spectra of the protein in the Amid I band spectral region indicates that violaxanthin isomerization is associated with the disaggregation of the complex. It is postulated that this reorganization of LHCII provides conditions for desorption of violaxanthin from the pigment protein complexes, its diffusion within the thylakoid membrane and therefore, availability to the enzymatic deepoxidation within the xanthophyll cycle. It is also possible that violaxanthin isomerization plays the role of a security valve, by consuming an energy of excessive excitations in the antenna pigment network (in particular, exchanged at the triplet state levels).
Collapse
Affiliation(s)
- Dariusz Niedzwiedzki
- Department of Biophysics, Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, Lublin 20-031, Poland
| | | | | |
Collapse
|
12
|
Iwaszko E, Wardak A, Krupa Z, Gruszecki WI. Ion transport across model lipid membranes containing light-harvesting complex II: an effect of light. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 74:13-21. [PMID: 15043842 DOI: 10.1016/j.jphotobiol.2004.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2003] [Revised: 01/22/2004] [Accepted: 01/23/2004] [Indexed: 11/23/2022]
Abstract
The effect of light on proton transport across lipid membranes of small unilamellar liposomes containing incorporated major light-harvesting pigment-protein complex of Photosystem II (LHCII) has been studied with the application of pH-sensitive dyes entrapped inside vesicles. Proton permeability coefficient for LHCII-modified membranes was found to be about twice as high as in the case of the control pure lipid vesicles. Illumination of the samples with light absorbed by the LHCII-bound photosynthetic pigments considerably affects the kinetics of proton transport: it increases the rate and decreases the steady-state level of proton gradient across the membranes. The effect was interpreted in terms of heat-induced conformational changes of LHCII molecular structures that affect proton buffering capacity of this protein. Both the control and the LHCII-modified lipid membranes have been found to be practically impermeable to Ca(++) ions, as demonstrated by fluorescence of liposome-entrapped calcium-sensitive probe calcium crimson. The slight differences in the proton transport across the LHCII-containing membranes under the presence of Ca(++) suggest calcium binding to this antenna protein.
Collapse
Affiliation(s)
- Ewa Iwaszko
- Department of Biophysics, Institute of Physics, Maria Curie-Skłodowska University, PL. M. Curie-Sklodowskiej 1, Lublin 20-031, Poland
| | | | | | | |
Collapse
|