1
|
Buta A, Nazaruk E, Dziubak D, Szewczyk A, Bilewicz R. Properties of electrode-supported lipid cubic mesophase films with embedded gramicidin A: structure and ion-transport studies. Bioelectrochemistry 2022; 144:108042. [PMID: 34942573 DOI: 10.1016/j.bioelechem.2021.108042] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 11/16/2022]
Abstract
The lipid cubic phase (LCP) is a nanomaterial composed of water channels surrounded by lipid bilayers. LCPs are stable at room temperature and are biocompatible. These features make the lipid cubic phases similar to biological membranes, and hence, are favorable for embedding membrane proteins. We show that the monoolein cubic phase deposited on the electrode forms a 3D lipid bilayer film convenient for electrochemical investigations of membrane proteins. In this research, we studied the effect of embedding an ionophoric peptide, gramicidin A (gA), on the structure and properties of the LCP film. The phase identity and structural parameters of the gramicidin-doped phase were characterized by small-angle X-ray scattering (SAXS). The potassium ion transport through the film were studied by electroanalytical methods: alternating current voltammetry (ACV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). Increased values for the current of the gramicidin-doped cubic phase compared to the empty cubic phase and changes of the EIS parameters confirmed that the peptide remained in the film in its active dimeric form. Our results show that the LCP can be considered a suitable 3D biomimetic film for the investigation of ion channels and other transporting membrane proteins, and for their application in electrochemical sensors.
Collapse
Affiliation(s)
- Aleksandra Buta
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology Polish Academy of Sciences, Pasteura 3, 02-093 Warsaw, Poland
| | - Ewa Nazaruk
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Damian Dziubak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Adam Szewczyk
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology Polish Academy of Sciences, Pasteura 3, 02-093 Warsaw, Poland
| | - Renata Bilewicz
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
| |
Collapse
|
2
|
Yamaguchi T, Kitazumi Y, Kano K, Shirai O. Permselectivity of Gramicidin A Channels Based on Single‐channel Recordings. ELECTROANAL 2020. [DOI: 10.1002/elan.201900684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Takuya Yamaguchi
- Division of Applied Life Sciences, Graduate School of Agriculture Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku Kyoto 606-8502 Japan
| | - Yuki Kitazumi
- Division of Applied Life Sciences, Graduate School of Agriculture Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku Kyoto 606-8502 Japan
| | - Kenji Kano
- Division of Applied Life Sciences, Graduate School of Agriculture Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku Kyoto 606-8502 Japan
| | - Osamu Shirai
- Division of Applied Life Sciences, Graduate School of Agriculture Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku Kyoto 606-8502 Japan
| |
Collapse
|
3
|
Kubota S, Shirai O, Kitazumi Y, Kano K. Analysis of Ion Transport through a Single Channel of Gramicidin A in Bilayer Lipid Membranes. ANAL SCI 2016; 32:189-92. [PMID: 26860564 DOI: 10.2116/analsci.32.189] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ion transport through a single channel of gramicidin A (GA) within the bilayer lipid membrane (BLM) between two aqueous phases (W1 and W2) has been analyzed based on the electroneutrality principle. The single-channel current increases in proportion to the magnitude of the applied membrane potential and is also dependent on the permeability coefficients of electrolyte ions (K(+) and Cl(-)). By varying the ratio of the concentration of KCl in W1 to that in W2, the ratio of the diffusion coefficient of K(+) in the BLM to that of Cl(-) in the BLM can be evaluated.
Collapse
Affiliation(s)
- Shintaro Kubota
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | | | | | | |
Collapse
|
4
|
KUBOTA S, SHIRAI O, HIBI T, TOZAWA Y, KANO K. Effect of Counter Ions on the Transport Current Across Membranes Containing KAT1 Potassium Channel. ANAL SCI 2013; 29:161-4. [DOI: 10.2116/analsci.29.161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Shintaro KUBOTA
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Osamu SHIRAI
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Takao HIBI
- Department of Bioscience, Fukui Prefectural University
| | - Yuzuru TOZAWA
- Cell-Free Science and Technology Research Center, Ehime University
| | - Kenji KANO
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| |
Collapse
|
5
|
Shirai O, Yoshida Y, Kihara S, Ohnuki T, Uehara A, Yamana H. Ion transport across a bilayer lipid membrane facilitated by gramicidin A – Effect of counter anions on the cation transport. J Electroanal Chem (Lausanne) 2006. [DOI: 10.1016/j.jelechem.2006.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Shirai O, Yoshida Y, Kihara S. Voltammetric study on ion transport across a bilayer lipid membrane in the presence of a hydrophobic ion or an ionophore. Anal Bioanal Chem 2006; 386:494-505. [PMID: 16847627 DOI: 10.1007/s00216-006-0435-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 03/08/2006] [Accepted: 03/14/2006] [Indexed: 11/30/2022]
Abstract
This review describes voltammetric studies on ion transport from one aqueous phase (W1) to another (W2) across a bilayer lipid membrane (BLM) containing a hydrophobic ion, valinomycin (Val) or gramicidin A (GA). In particular, the ion transport mechanisms are discussed in terms of the distribution of a pair of ions between aqueous and BLM phases. By addition of a small amount of hydrophobic ion into W1 and/or W2 containing a hydrophilic salt as a supporting electrolyte, the hydrophobic ion was distributed into the BLM with the counter ion to maintain electroneutrality within the BLM phase. It was found that the counter ion was transferred between W1 and W2 across the BLM by applying a membrane potential. Facilitated transport of alkali ions across a BLM containing Val as an ion carrier compound, could be interpreted by considering not only the formation of the alkali metal ion-Val complex but also the distribution of both the objective cation and the counter ion. In the case of addition of GA as a channel-forming compound into the BLM, the facilitated transport of alkali ions across the BLM depended on the ionic species of the counter ions. It was discovered that the influence of the counter ion on the facilitated transport of alkali ions across the BLM could be explained in terms of the hydrophobicity and the ionic radius of the counter ion.
Collapse
Affiliation(s)
- Osamu Shirai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto, 606-8502, Japan.
| | | | | |
Collapse
|
7
|
Yue J, Li Y, Su Y, Lin K. Abnormal behavior of fluorescence quenching of gramicidin A in phase transition of lipid vesicles by hypocrellin B—Does an electron transfer inverted region exist? ACTA ACUST UNITED AC 1999. [DOI: 10.1007/bf02887123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
8
|
Quenching of fluorescence in membrane protein by hypocrellin B. ACTA ACUST UNITED AC 1997; 40:194-201. [DOI: 10.1007/bf02882048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/1996] [Indexed: 10/22/2022]
|
9
|
Affiliation(s)
- J A Killian
- Department of Biochemistry of Membranes, University of Utrecht, Netherlands
| |
Collapse
|
10
|
Abstract
We have discussed in some detail a variety of experimental studies which were designed to elucidate the conformational and dynamic properties of gramicidin and alamethicin. Although the behavior of these peptides is by no means fully characterized, these studies have already permitted aspects of ion channel activity to be understood in molecular terms. Studies with gramicidin in a variety of organic solutions have revealed conformational heterogeneity of this peptide; at least five major isomers exist, several of which have been characterized in detail using NMR spectroscopy and X-ray crystallography. When added to lipid membranes gramicidin undergoes a further conformational conversion. Although the conformation of gramicidin in membranes is not as well characterized as the solution conformation(s) and an X-ray structure is not yet available, detailed data, particularly from solid-state NMR studies, continue to become available and a right-handed beta 6.3 helical conformation of the peptide backbone is now generally accepted. Two of these beta 6.3 helices joined at their N-termini are believed to form the conducting channel. The conformational behavior of the side-chains of gramicidin in the membrane-bound form is not well established and several NMR, CD, fluorescence and theoretical studies are now focussed on this. Although the side-chains do not directly contact the permeating ions, they can have distinct effects on conductance and selectivity by altering the electrostatic environment sensed by the ion. The dynamics of both side-chain and backbone conformations of gramicidin appear critical to a detailed understanding of the ion transport process in this channel. As the description of the membrane-bound conformation of gramicidin becomes more detailed, simulations of ion transport using computational methods are likely to improve and will further our understanding of the processes of ion transport. As well as internal motion of the backbone and side-chains, gramicidin undergoes rotational and translational motion in the plane of the membrane. These motions do not appear to be essential for the process of ion transport but can affect channel lifetime since lifetime is determined by the rate of association and dissociation of gramicidin monomers. Gramicidin-membrane interactions are also likely to be involved in the frequency of occurrence of channel subconductance states, the frequency of channel flickering and fundamentally in the stability of the membrane-bound gramicidin conformation. Alamethicin forms channels in membranes which are strongly voltage-dependent. The molecular origin of voltage-dependent conductances has been a fundamental problem in biophysics for many years.(ABSTRACT TRUNCATED AT 400 WORDS)
Collapse
Affiliation(s)
- G A Woolley
- Department of Crystallography, Birkbeck College, University of London, United Kingdom
| | | |
Collapse
|
11
|
|
12
|
Watanabe S, Watanabe S, Senō M. Effect of gramicidin on the ion permeability of liposomes in the presence of mixed electrolytes. J Memb Sci 1989. [DOI: 10.1016/s0376-7388(00)83356-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
13
|
|
14
|
Cohen BE, Ramos H, Gamargo M, Urbina J. The water and ionic permeability induced by polyene antibiotics across plasma membrane vesicles from Leishmania sp. BIOCHIMICA ET BIOPHYSICA ACTA 1986; 860:57-65. [PMID: 3730386 DOI: 10.1016/0005-2736(86)90498-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An osmotic method has been used to study the effect of the polyene antibiotics amphotericin B, nystatin and candicidin on the water permeability of plasma membranes prepared from Leishmania sp. The effect of amphotericin B on the permeability of Leishmania membranes to a salt such as potassium nitrate was also investigated. A non-linear and saturable enhancement of water and salt permeability was measured with increasing polyene concentrations, which could be adjusted to Hill cooperativity equation. The antibiotic concentrations that induce at 30 degrees C half-maximal effects on the water permeability of Leishmania vesicles were 0.021 microM for candicidin, 0.21 microM for amphotericin B and 1.4 microM for nystatin. At 30 degrees C, the concentration of amphotericin B required to induce half of the maximal effect on the permeability of Leishmania vesicles to potassium nitrate was 1.8 microM. The temperature dependence for amphotericin B, nystatin and candicidin enhancement of the water permeability of Leishmania vesicles was determined by using Q10 data at 20 and 30 degrees C. The estimated activation energies at increasing polyene concentrations display the same general pattern for all three polyene antibiotics investigated, that is, a maximal positive value at about the polyene concentrations required for half-maximal effect. The significance of these results for understanding the mechanisms of action of polyene antibiotics on natural membranes is discussed.
Collapse
|