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Harder D, Ritzmann N, Ucurum Z, Müller DJ, Fotiadis D. Light Color-Controlled pH-Adjustment of Aqueous Solutions Using Engineered Proteoliposomes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307524. [PMID: 38342618 PMCID: PMC11022694 DOI: 10.1002/advs.202307524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/16/2024] [Indexed: 02/13/2024]
Abstract
Controlling the pH at the microliter scale can be useful for applications in research, medicine, and industry, and therefore represents a valuable application for synthetic biology and microfluidics. The presented vesicular system translates light of different colors into specific pH changes in the surrounding solution. It works with the two light-driven proton pumps bacteriorhodopsin and blue light-absorbing proteorhodopsin Med12, that are oriented in opposite directions in the lipid membrane. A computer-controlled measuring device implements a feedback loop for automatic adjustment and maintenance of a selected pH value. A pH range spanning more than two units can be established, providing fine temporal and pH resolution. As an application example, a pH-sensitive enzyme reaction is presented where the light color controls the reaction progress. In summary, light color-controlled pH-adjustment using engineered proteoliposomes opens new possibilities to control processes at the microliter scale in different contexts, such as in synthetic biology applications.
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Affiliation(s)
- Daniel Harder
- Institute of Biochemistry and Molecular MedicineUniversity of BernBern3012Switzerland
- National Centre of Competence in Research (NCCR)Molecular Systems EngineeringBaselSwitzerland
| | - Noah Ritzmann
- National Centre of Competence in Research (NCCR)Molecular Systems EngineeringBaselSwitzerland
- Department of Biosystems Science and EngineeringETH ZürichBasel4056Switzerland
| | - Zöhre Ucurum
- Institute of Biochemistry and Molecular MedicineUniversity of BernBern3012Switzerland
| | - Daniel J. Müller
- National Centre of Competence in Research (NCCR)Molecular Systems EngineeringBaselSwitzerland
- Department of Biosystems Science and EngineeringETH ZürichBasel4056Switzerland
| | - Dimitrios Fotiadis
- Institute of Biochemistry and Molecular MedicineUniversity of BernBern3012Switzerland
- National Centre of Competence in Research (NCCR)Molecular Systems EngineeringBaselSwitzerland
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Petrovskaya LE, Lukashev EP, Mamedov MD, Kryukova EA, Balashov SP, Dolgikh DA, Rubin AB, Kirpichnikov MP, Siletsky SA. Oriented Insertion of ESR-Containing Hybrid Proteins in Proteoliposomes. Int J Mol Sci 2023; 24:ijms24087369. [PMID: 37108532 PMCID: PMC10138546 DOI: 10.3390/ijms24087369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/13/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
Microbial rhodopsins comprise a diverse family of retinal-containing membrane proteins that convert absorbed light energy to transmembrane ion transport or sensory signals. Incorporation of these proteins in proteoliposomes allows their properties to be studied in a native-like environment; however, unidirectional protein orientation in the artificial membranes is rarely observed. We aimed to obtain proteoliposomes with unidirectional orientation using a proton-pumping retinal protein from Exiguobacterium sibiricum, ESR, as a model. Three ESR hybrids with soluble protein domains (mCherry or thioredoxin at the C-terminus and Caf1M chaperone at the N-terminus) were obtained and characterized. The photocycle of the hybrid proteins incorporated in proteoliposomes demonstrated a higher pKa of the M state accumulation compared to that of the wild-type ESR. Large negative electrogenic phases and an increase in the relative amplitude of kinetic components in the microsecond time range in the kinetics of membrane potential generation of ESR-Cherry and ESR-Trx indicate a decrease in the efficiency of transmembrane proton transport. On the contrary, Caf-ESR demonstrates a native-like kinetics of membrane potential generation and the corresponding electrogenic stages. Our experiments show that the hybrid with Caf1M promotes the unidirectional orientation of ESR in proteoliposomes.
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Affiliation(s)
- Lada E Petrovskaya
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia
| | - Evgeniy P Lukashev
- Department of Biology, Lomonosov Moscow State University, Leninskie Gory, 1, 119234 Moscow, Russia
| | - Mahir D Mamedov
- Belozersky Institute of Physical-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Elena A Kryukova
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia
| | - Sergei P Balashov
- Department of Physiology and Biophysics, University of California, Irvine, CA 92697, USA
| | - Dmitry A Dolgikh
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia
- Department of Biology, Lomonosov Moscow State University, Leninskie Gory, 1, 119234 Moscow, Russia
| | - Andrei B Rubin
- Department of Biology, Lomonosov Moscow State University, Leninskie Gory, 1, 119234 Moscow, Russia
| | - Mikhail P Kirpichnikov
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Ul. Miklukho-Maklaya, 16/10, 117997 Moscow, Russia
- Department of Biology, Lomonosov Moscow State University, Leninskie Gory, 1, 119234 Moscow, Russia
| | - Sergey A Siletsky
- Belozersky Institute of Physical-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
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Zhong YR, Yu TY, Chu LK. Roles of functional lipids in bacteriorhodopsin photocycle in various delipidated purple membranes. Biophys J 2022; 121:1789-1798. [PMID: 35440419 DOI: 10.1016/j.bpj.2022.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 04/07/2022] [Accepted: 04/15/2022] [Indexed: 11/30/2022] Open
Abstract
Purple membrane (PM) is composed of several native lipids and the transmembrane protein bacteriorhodopsin (bR) in trimeric configuration. The delipidated PM (dPM) samples can be prepared by treating PM with CHAPS (3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate) to partially remove native lipids while maintaining bR in the trimeric configuration. By correlating the photocycle kinetics of bR and the exact lipid compositions of the various dPM samples, one can reveal the roles of native PM lipids. However, it is challenging to compare the lipid compositions of the various dPM samples quantitatively. Here, we utilized the absorbances of extracted retinal at 382 nm to normalize the concentrations of the remaining lipids in each dPM sample, which were then quantified by mass spectrometry, allowing us to compare the lipid compositions of different samples in a quantitative manner. The corresponding photocycle kinetics of bR were probed by transient difference absorption spectroscopy. We found that the removal rate of the polar lipids follows the order of BPG ≈ GlyC < S-TGD-1 ≈ PG < PGP-Me ≈ PGS. Since BPG and GlyC have more nonpolar phytanyl groups than other lipids at the hydrophobic tail, causing a higher affinity with the hydrophobic surface of bR, the corresponding removal rates are slowest. In addition, as the reaction period of PM and CHAPS increases, the residual amounts of PGS and PGP-Me significantly decrease, in concomitance with the decelerated rates of the recovery of ground state and the decay of intermediate M, and the reduced transient population of intermediate O. PGS and PGP-Me are the lipids with the highest correlation to the photocycle activity among the six polar lipids of PM. From a practical viewpoint, combining optical spectroscopy and mass spectrometry appears a promising approach to simultaneously track the functions and the concomitant active components in a given biological system.
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Affiliation(s)
- Yi-Rui Zhong
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Tsyr-Yan Yu
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan; International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei, Taiwan.
| | - Li-Kang Chu
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan.
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Yeh V, Lee TY, Chen CW, Kuo PC, Shiue J, Chu LK, Yu TY. Highly Efficient Transfer of 7TM Membrane Protein from Native Membrane to Covalently Circularized Nanodisc. Sci Rep 2018; 8:13501. [PMID: 30201976 PMCID: PMC6131177 DOI: 10.1038/s41598-018-31925-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 08/29/2018] [Indexed: 11/09/2022] Open
Abstract
Incorporating membrane proteins into membrane mimicking systems is an essential process for biophysical studies and structure determination. Monodisperse lipid nanodiscs have been found to be a suitable tool, as they provide a near-native lipid bilayer environment. Recently, a covalently circularized nanodisc (cND) assembled with a membrane scaffold protein (MSP) in circular form, instead of conventional linear form, has emerged. Covalently circularized nanodiscs have been shown to have improved stability, however the optimal strategies for the incorporation of membrane proteins, as well as the physicochemical properties of the membrane protein embedded in the cND, have not been studied. Bacteriorhodopsin (bR) is a seven-transmembrane helix (7TM) membrane protein, and it forms a two dimensional crystal consisting of trimeric bR on the purple membrane of halophilic archea. Here it is reported that the bR trimer in its active form can be directly incorporated into a cND from its native purple membrane. Furthermore, the assembly conditions of the native purple membrane nanodisc (PMND) were optimized to achieve homogeneity and high yield using a high sodium chloride concentration. Additionally, the native PMND was demonstrated to have the ability to assemble over a range of different pHs, suggesting flexibility in the preparation conditions. The native PMND was then found to not only preserve the trimeric structure of bR and most of the native lipids in the PM, but also maintained the photocycle function of bR. This suggests a promising potential for assembling a cND with a 7TM membrane protein, extracted directly from its native membrane environment, while preserving the protein conformation and lipid composition.
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Affiliation(s)
- Vivien Yeh
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan.,Department of Chemistry, National Taiwan University, 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan
| | - Tsung-Yen Lee
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd., Hsinchu, 30013, Taiwan
| | - Chung-Wen Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan
| | - Pai-Chia Kuo
- Institute of Physics, Academia Sinica, No.128, Sec. 2, Academia Rd., Taipei, 11529, Taiwan
| | - Jessie Shiue
- Institute of Physics, Academia Sinica, No.128, Sec. 2, Academia Rd., Taipei, 11529, Taiwan
| | - Li-Kang Chu
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd., Hsinchu, 30013, Taiwan.
| | - Tsyr-Yan Yu
- Institute of Atomic and Molecular Sciences, Academia Sinica, 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan.
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Jawurek M, Dröden J, Peter B, Glaubitz C, Hauser K. Lipid-induced dynamics of photoreceptors monitored by time-resolved step-scan FTIR spectroscopy. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Evaluation of diacylphospholipids as boundary lipids for bacteriorhodopsin from structural and functional aspects. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2106-2115. [DOI: 10.1016/j.bbamem.2016.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 11/18/2022]
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Zhao Y, Vararattanavech A, Li X, Hélixnielsen C, Vissing T, Torres J, Wang R, Fane AG, Tang CY. Effects of proteoliposome composition and draw solution types on separation performance of aquaporin-based proteoliposomes: implications for seawater desalination using aquaporin-based biomimetic membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:1496-1503. [PMID: 23311686 DOI: 10.1021/es304306t] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Aquaporins are a large family of water transport proteins in cell membranes. Their high water permeability and solute rejection make them potential building blocks for high-performance biomimetic membranes for desalination. In the current study, proteoliposomes were prepared using AquaporinZ from Escherichia coli cells, and their separation properties were characterized by stopped-flow measurements. The current study systematically investigated the effect of proteoliposome composition (lipid type, protein-to-lipid ratio (PLR), and the addition of cholesterol) on water permeability and NaCl retention. Among the various lipids investigated, 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC)-based proteoliposomes were found to have excellent osmotic water permeability and NaCl reflection coefficient values. Increasing the PLR of DOPC proteoliposomes up to 1:200 increased their osmotic water permeability. However, further increase in the PLR reduced the osmotic water permeability probably due to the occurrence of defects in the proteoliposomes, whereas the addition of cholesterol improved their osmotic water permeation likely due to defects sealing. The current study also investigated the effect of major dissolved ions in seawater (e.g., Mg(2+) and SO(4)(2-)) on the stability of proteoliposomes, and design criteria for aquaporin-based biomimetic membranes are proposed in the context of desalination.
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Affiliation(s)
- Yang Zhao
- Singapore Membrane Technology Centre, Nanyang Technological University, Singapore 639798
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Tantawi KH, Cerro R, Berdiev B, Martin MED, Montes FJ, Patel D, Williams JD. Investigation of transmembrane protein fused in lipid bilayer membranes supported on porous silicon. J Med Eng Technol 2012; 37:28-34. [DOI: 10.3109/03091902.2012.733056] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Graff A, Fraysse-Ailhas C, Palivan CG, Grzelakowski M, Friedrich T, Vebert C, Gescheidt G, Meier W. Amphiphilic Copolymer Membranes Promote NADH:Ubiquinone Oxidoreductase Activity: Towards an Electron-Transfer Nanodevice. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200900517] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Nielsen CH. Biomimetic membranes for sensor and separation applications. Anal Bioanal Chem 2009; 395:697-718. [DOI: 10.1007/s00216-009-2960-0] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 07/02/2009] [Accepted: 07/07/2009] [Indexed: 01/04/2023]
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