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Fracassi A, Podolsky KA, Pandey S, Xu C, Hutchings J, Seifert S, Baiz CR, Sinha SK, Devaraj NK. Characterizing the Self-Assembly Properties of Monoolein Lipid Isosteres. J Phys Chem B 2023; 127:1771-1779. [PMID: 36795462 PMCID: PMC9986874 DOI: 10.1021/acs.jpcb.2c07215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Living cells feature lipid compartments which exhibit a variety of shapes and structures that assist essential cellular processes. Many natural cell compartments frequently adopt convoluted nonlamellar lipid architectures that facilitate specific biological reactions. Improved methods for controlling the structural organization of artificial model membranes would facilitate investigations into how membrane morphology affects biological functions. Monoolein (MO) is a single-chain amphiphile which forms nonlamellar lipid phases in aqueous solution and has wide applications in nanomaterial development, the food industry, drug delivery, and protein crystallization. However, even if MO has been extensively studied, simple isosteres of MO, while readily accessible, have seen limited characterization. An improved understanding of how relatively minor changes in lipid chemical structure affect self-assembly and membrane topology could instruct the construction of artificial cells and organelles for modeling biological structures and facilitate nanomaterial-based applications. Here, we investigate the differences in self-assembly and large-scale organization between MO and two MO lipid isosteres. We show that replacing the ester linkage between the hydrophilic headgroup and hydrophobic hydrocarbon chain with a thioesther or amide functional group results in the assembly of lipid structures with different phases not resembling those formed by MO. Using light and cryo-electron microscopy, small-angle X-ray scattering, and infrared spectroscopy, we demonstrate differences in the molecular ordering and large-scale architectures of the self-assembled structures made from MO and its isosteric analogues. These results improve our understanding of the molecular underpinnings of lipid mesophase assembly and may facilitate the development of MO-based materials for biomedicine and as model lipid compartments.
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Affiliation(s)
- Alessandro Fracassi
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Natural Sciences Building 3328, La Jolla, California92093, United States
| | - Kira A Podolsky
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Natural Sciences Building 3328, La Jolla, California92093, United States
| | - Sudip Pandey
- Department of Physics, University of California, San Diego, 9500 Gilman Drive, Mayer Hall Addition 4561, La Jolla, California92093, United States
| | - Cong Xu
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St. Stop A5300, Austin, Texas78712-1224, United States
| | - Joshua Hutchings
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, La Jolla, California92093, United States
| | - Soenke Seifert
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois60439, United States
| | - Carlos R Baiz
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St. Stop A5300, Austin, Texas78712-1224, United States
| | - Sunil K Sinha
- Department of Physics, University of California, San Diego, 9500 Gilman Drive, Mayer Hall Addition 4561, La Jolla, California92093, United States
| | - Neal K Devaraj
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Natural Sciences Building 3328, La Jolla, California92093, United States
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Bulanadi JC, Xue A, Gong X, Bean PA, Julovi SM, de Campo L, Smith RC, Moghaddam MJ. Biomimetic Gemcitabine-Lipid Prodrug Nanoparticles for Pancreatic Cancer. Chempluschem 2021; 85:1283-1291. [PMID: 32543086 DOI: 10.1002/cplu.202000253] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/15/2020] [Indexed: 12/18/2022]
Abstract
Gemcitabine (Gem) is a key drug for pancreatic cancer, yet limited by high systemic toxicity, low bioavailability and poor pharmacokinetic profiles. To overcome these limitations, Gem prodrug amphiphiles were synthesised with oleyl, linoleyl and phytanyl chains. Self-assembly and lyotropic mesophase behaviour of these amphiphiles were examined using polarised optical microscopy and Synchrotron SAXS (SSAXS). Gem-phytanyl was found to form liquid crystalline inverse cubic mesophase. This prodrug was combined with phospholipids and cholesterol to create biomimetic Gem-lipid prodrug nanoparticles (Gem-LPNP), verified by SSAXS and cryo-TEM to form liposomes. In vitro testing of the Gem-LPNP in several pancreatic cancer cell lines showed lower toxicity than Gem. However, in a cell line-derived pancreatic cancer mouse model Gem-LPNP displayed greater tumour growth inhibition than Gem using a fraction (<6 %) of the clinical dose and without any systemic toxicity. The easy production, improved efficacy and low toxicity of Gem-LPNP represents a promising new nanomedicine for pancreatic cancer.
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Affiliation(s)
- Jerikho C Bulanadi
- CSIRO Manufacturing, P.O. BOX 52, North Ryde, NSW, 1670, Australia.,Cancer Surgery and Metabolism Group, University of Sydney, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Aiqun Xue
- Cancer Surgery and Metabolism Group, University of Sydney, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Xiaojuan Gong
- CSIRO Manufacturing, P.O. BOX 52, North Ryde, NSW, 1670, Australia.,NanoMed Pty Ltd., 2/11-13 Orion Road, Lane Cove West, NSW, 2066, Australia
| | - Penelope A Bean
- CSIRO Manufacturing, P.O. BOX 52, North Ryde, NSW, 1670, Australia.,NanoMed Pty Ltd., 2/11-13 Orion Road, Lane Cove West, NSW, 2066, Australia
| | - Sohel M Julovi
- Cancer Surgery and Metabolism Group, University of Sydney, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | | | - Ross C Smith
- Cancer Surgery and Metabolism Group, University of Sydney, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia.,NanoMed Pty Ltd., 2/11-13 Orion Road, Lane Cove West, NSW, 2066, Australia
| | - Minoo J Moghaddam
- CSIRO Manufacturing, P.O. BOX 52, North Ryde, NSW, 1670, Australia.,NanoMed Pty Ltd., 2/11-13 Orion Road, Lane Cove West, NSW, 2066, Australia
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Isoprenoid-chained lipid EROCOC 17+4: a new matrix for membrane protein crystallization and a crystal delivery medium in serial femtosecond crystallography. Sci Rep 2020; 10:19305. [PMID: 33168855 PMCID: PMC7652841 DOI: 10.1038/s41598-020-76277-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 10/26/2020] [Indexed: 11/08/2022] Open
Abstract
In meso crystallization of membrane proteins relies on the use of lipids capable of forming a lipidic cubic phase (LCP). However, almost all previous crystallization trials have used monoacylglycerols, with 1-(cis-9-octadecanoyl)-rac-glycerol (MO) being the most widely used lipid. We now report that EROCOC17+4 mixed with 10% (w/w) cholesterol (Fig. 1) serves as a new matrix for crystallization and a crystal delivery medium in the serial femtosecond crystallography of Adenosine A2A receptor (A2AR). The structures of EROCOC17+4-matrix grown A2AR crystals were determined at 2.0 Å resolution by serial synchrotron rotation crystallography at a cryogenic temperature, and at 1.8 Å by LCP-serial femtosecond crystallography, using an X-ray free-electron laser at 4 and 20 °C sample temperatures, and are comparable to the structure of the MO-matrix grown A2AR crystal (PDB ID: 4EIY). Moreover, X-ray scattering measurements indicated that the EROCOC17+4/water system did not form the crystalline LC phase at least down to - 20 °C, in marked contrast to the equilibrium MO/water system, which transforms into the crystalline LC phase below about 17 °C. As the LC phase formation within the LCP-matrix causes difficulties in protein crystallography experiments in meso, this feature of EROCOC17+4 will expand the utility of the in meso method.
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Silica Mesoporous Structures: Effective Nanocarriers in Drug Delivery and Nanocatalysts. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10217533] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The application of silica mesoporous structures in drug delivery and the removal of pollutants and organic compounds through catalytic reactions is increasing due to their unique characteristics, including high loading capacities, tunable pores, large surface areas, sustainability, and so on. This review focuses on very well-studied class of different construction mesoporous silica nano(particles), such as MCM-41, SBA-15, and SBA-16. We discuss the essential parameters involved in the synthesis of these materials with providing a diverse set of examples. In addition, the recent advances in silica mesoporous structures for drug delivery and catalytic applications are presented to fill the existing gap in the literature with providing some promising examples on this topic for the scientists in both industry and academia active in the field. Regarding the catalytic applications, mesoporous silica particles have shown some promises to remove the organic pollutants and to synthesize final products with high yields due to the ease with which their surfaces can be modified with various ligands to create appropriate interactions with target molecules. In the drug delivery process, as nanocarriers, they have also shown very good performance thanks to the easy surface functionalization but also adjustability of their porosities to providing in-vivo and in-vitro cargo delivery at the target site with appropriate rate.
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Vallooran JJ, Duss M, Ansorge P, Mezzenga R, Landau EM. Stereochemical Purity Can Induce a New Crystalline Mesophase in Phytantriol Lipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9132-9141. [PMID: 32654490 DOI: 10.1021/acs.langmuir.0c01344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The impact of stereochemical purity of lipids on their self-assembly behavior is critical for establishing their true phase behavior from their commercial counterparts, which often contains stereoisomeric mixtures and other impurities. Here, stereochemically pure phytantriol (PT), (3,7,11,15-tetramethylhexadecane-1,2,3-triol) was synthesized from the natural trans-phytol and its thermotropic and lyotropic phase behavior in water investigated by small-angle X-ray scattering (SAXS), polarized optical microscopy (POM), and differential scanning calorimetry (DSC). These chemically pure lipids contain two chiral centers at the hydrophilic head group region and two chiral centers at the lipophilic tail region, allowing us to address the question of whether the molecular stereochemistry is related to the macroscopic phase behavior of phytantriol. In contrast to its commercial stereoisomeric mixtures, which form an isotropic micellar phase, neat (2S,3S,7R,11R)-3,7,11,15-tetramethylhexadecane-1,2,3-triol (S,S-PT) shows a smectic lamellar phase at room temperature, whereas (2R,3R,7R,11R)-3,7,11,15-tetramethylhexadecane-1,2,3-triol (R,R-PT) forms solid crystals. The lyotropic phase behavior of R,R-PT appears to be identical to that of the previously reported commercial stereoisomeric PT mixtures. In contrast, S,S-PT exhibits a different phase behavior. A lamellar crystalline phase (Lc) is formed instead of an isotropic micellar phase at a low water content, which also coexisted with other phases at low temperature. Subtle change in the shape of the diastereomers leads to variable steric interactions and subsequently affects the packing of the lipids at the molecular level, thereby influencing its self-assembling behavior. Finally, lipidic cubic phase crystallization of the membrane protein bacteriorhodopsin yielded a larger number of microcrystals with a higher average crystal length from S,S-PT than from commercial PT, suggesting faster nucleation.
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Affiliation(s)
- Jijo J Vallooran
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Michael Duss
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Philipp Ansorge
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology, ETH Zurich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Ehud M Landau
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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Murakami T, Hijikuro I, Yamashita K, Tsunoda S, Hirai K, Suzuki T, Sakai Y, Tabata Y. Antiadhesion effect of the C17 glycerin ester of isoprenoid-type lipid forming a nonlamellar liquid crystal. Acta Biomater 2019; 84:257-267. [PMID: 30529080 DOI: 10.1016/j.actbio.2018.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 11/20/2018] [Accepted: 12/04/2018] [Indexed: 12/17/2022]
Abstract
Postoperative adhesion is a relevant clinical problem that causes a variety of clinical complications after abdominal surgery. The objective of this study is to develop a liquid-type antiadhesion agent and evaluate its efficacy in preventing tissue adhesion in a rat peritoneal adhesion model. The liquid-type agent was prepared by submicron-sized emulsification of C17 glycerin ester (C17GE), squalene, pluronic F127, ethanol, and water with a high-pressure homogenizer. The primary component was C17GE, which is an amphiphilic lipid of one isoprenoid-type hydrophobic chain and can form two phases of self-assembly nonlamellar liquid crystals. The C17GE agent consisted of nanoparticles with an internal inverted hexagonal phase when evaluated by small-angle X-ray scattering (SAXS) and cryo-transmission electron microscopy (cryo-TEM). Upon contact with the biological tissue, this agent formed a thin membrane with a bioadhesive property. After this agent was applied to a sidewall injury of rats, it showed a percentage average of adhesion significantly less than that obtained with the Seprafilm® antiadhesion membrane in a rat model. Additionally, the retention of the agent prolonged at the applied site in the peritoneal cavity of rats. In conclusion, the C17GE agent is promising as an antiadhesion material. STATEMENT OF SIGNIFICANCE: Postoperative adhesion remains a common adverse effect. Although various materials have been investigated, there are few products commercially available to prevent adhesion. For the sheet-type agent, it is inconvenient to be applied through small laparotomy, especially in laparoscopic surgery. Additionally, the liquid-type agent currently used requires a complicated procedure to spray at the targeted site. Our liquid-type antiadhesion agent can form liquid crystals and act as a thin membrane-like physical barrier between the peritoneum and tissues to prevent adhesion. Indeed, the antiadhesion agent used in our present study significantly prevents adhesion compared with the antiadhesion membrane most used clinically. Moreover, our agent is highly stable by itself and easy to use in laparoscopic surgery, thus leading to a promising new candidate as an antiadhesion material.
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Affiliation(s)
- Takahide Murakami
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Laboratory of Biomaterials, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Ichiro Hijikuro
- Farnex Incorporated, Tokyo Institute of Technology Yokohama Venture Plaza, 4259 - 3, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, Japan
| | - Kota Yamashita
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Laboratory of Biomaterials, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Shigeru Tsunoda
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kenjiro Hirai
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takahisa Suzuki
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Laboratory of Biomaterials, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Yoshiharu Sakai
- Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan.
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7
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Saari NAN, Mislan AA, Hashim R, Zahid NI. Self-Assembly, Thermotropic, and Lyotropic Phase Behavior of Guerbet Branched-Chain Maltosides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8962-8974. [PMID: 29999321 DOI: 10.1021/acs.langmuir.8b01899] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Five synthetic β-d-maltosides derived from Guerbet branched alcohols, whose total hydrocarbon chain length ranged from C8 to C24, were synthesized to a high anomeric purity, and their thermal properties, liquid-crystalline phases, and structures were characterized using differential scanning calorimetry, optical polarizing microscopy, and small-angle X-ray scattering. Thermal investigations of all anhydrous Guerbet maltosides showed that they do not form solid crystals but undergo a glass transition upon temperature change in the range of 35-53 °C. The glassy crystalline structure turns into the liquid-crystalline structure upon heating or addition of water. In thermotropic studies, the lamellar phase formation is prominent in shorter-chain-length analogues, whereas the longer-chain compounds exhibit a more frustrated form of self-assembly in the formation of a metastable state, polymorphism, and inverse bicontinuous cubic structure ( Ia3 d). The excess water conditions show that the phase formation is dominated by the lamellar phase for the longer-chain compounds. Normal micellar solution was observed in the shortest-chain-length maltosides because of the enlargement of hydrated maltose headgroups. The self-assembly of both dry and fully hydrated Guerbet maltosides, which exhibited glass-forming abilities and showed surface activity and also the ability to act as membrane-stabilizing compounds, makes them ideal candidates for practical use in industry as well as biomedical research.
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Affiliation(s)
- N A Nabila Saari
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Azwa Amanina Mislan
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Rauzah Hashim
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - N Idayu Zahid
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
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Abstract
G protein-coupled receptors (GPCRs) represent a large superfamily of membrane proteins that mediate cell signaling and regulate a variety of physiological processes in the human body. Structure-function studies of this superfamily were enabled a decade ago by multiple breakthroughs in technology that included receptor stabilization, crystallization in a membrane environment, and microcrystallography. The recent emergence of X-ray free-electron lasers (XFELs) has further accelerated structural studies of GPCRs and other challenging proteins by overcoming radiation damage and providing access to high-resolution structures and dynamics using micrometer-sized crystals. Here, we summarize key technology advancements and major milestones of GPCR research using XFELs and provide a brief outlook on future developments in the field.
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Affiliation(s)
- Benjamin Stauch
- Department of Chemistry and Bridge Institute, University of Southern California, Los Angeles, California 90089, USA; ,
| | - Vadim Cherezov
- Department of Chemistry and Bridge Institute, University of Southern California, Los Angeles, California 90089, USA; ,
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9
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D'Arrigo JS. Targeting Early Dementia: Using Lipid Cubic Phase Nanocarriers to Cross the Blood⁻Brain Barrier. Biomimetics (Basel) 2018; 3:E4. [PMID: 31105226 PMCID: PMC6352688 DOI: 10.3390/biomimetics3010004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/21/2018] [Accepted: 03/06/2018] [Indexed: 12/14/2022] Open
Abstract
Over the past decades, a frequent co-morbidity of cerebrovascular pathology and Alzheimer's disease has been observed. Numerous published studies indicate that the preservation of a healthy cerebrovascular endothelium can be an important therapeutic target. By incorporating the appropriate drug(s) into biomimetic (lipid cubic phase) nanocarriers, one obtains a multitasking combination therapeutic, which targets certain cell surface scavenger receptors, mainly class B type I (i.e., SR-BI), and crosses the blood⁻brain barrier. This targeting allows for various cell types related to Alzheimer's to be simultaneously searched out for localized drug treatment in vivo.
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10
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Tran N, Mulet X, Hawley AM, Fong C, Zhai J, Le TC, Ratcliffe J, Drummond CJ. Manipulating the Ordered Nanostructure of Self-Assembled Monoolein and Phytantriol Nanoparticles with Unsaturated Fatty Acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2764-2773. [PMID: 29381863 DOI: 10.1021/acs.langmuir.7b03541] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mesophase structures of self-assembled lyotropic liquid crystalline nanoparticles are important factors that directly influence their ability to encapsulate and release drugs and their biological activities. However, it is difficult to predict and precisely control the mesophase behavior of these materials, especially in complex systems with several components. In this study, we report the controlled manipulation of mesophase structures of monoolein (MO) and phytantriol (PHYT) nanoparticles by adding unsaturated fatty acids (FAs). By using high throughput formulation and small-angle X-ray scattering characterization methods, the effects of FAs chain length, cis-trans isomerism, double bond location, and level of chain unsaturation on self-assembled systems are determined. Additionally, the influence of temperature on the phase behavior of these nanoparticles is analyzed. We found that in general, the addition of unsaturated FAs to MO and PHYT induces the formation of mesophases with higher Gaussian surface curvatures. As a result, a rich variety of lipid polymorphs are found to correspond with the increasing amounts of FAs. These phases include inverse bicontinuous cubic, inverse hexagonal, and discrete micellar cubic phases and microemulsion. However, there are substantial differences between the phase behavior of nanoparticles with trans FA, cis FAs with one double bond, and cis FAs with multiple double bonds. Therefore, the material library produced in this study will assist the selection and development of nanoparticle-based drug delivery systems with desired mesophase.
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Affiliation(s)
- Nhiem Tran
- CSIRO Manufacturing , Clayton, Victoria 3149, Australia
| | - Xavier Mulet
- CSIRO Manufacturing , Clayton, Victoria 3149, Australia
| | - Adrian M Hawley
- Australian Synchrotron, ANSTO , Clayton, Victoria 3149, Australia
| | - Celesta Fong
- CSIRO Manufacturing , Clayton, Victoria 3149, Australia
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11
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Hori T, Okuno T, Hirata K, Yamashita K, Kawano Y, Yamamoto M, Hato M, Nakamura M, Shimizu T, Yokomizo T, Miyano M, Yokoyama S. Na +-mimicking ligands stabilize the inactive state of leukotriene B 4 receptor BLT1. Nat Chem Biol 2018; 14:262-269. [PMID: 29309055 DOI: 10.1038/nchembio.2547] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 11/14/2017] [Indexed: 01/07/2023]
Abstract
Most G-protein-coupled receptors (GPCRs) are stabilized in common in the inactive state by the formation of the sodium ion-centered water cluster with the conserved Asp2.50 inside the seven-transmembrane domain. We determined the crystal structure of the leukotriene B4 (LTB4) receptor BLT1 bound with BIIL260, a chemical bearing a benzamidine moiety. Surprisingly, the amidine group occupies the sodium ion and water locations, interacts with D662.50, and mimics the entire sodium ion-centered water cluster. Thus, BLT1 is fixed in the inactive state, and the transmembrane helices cannot change their conformations to form the active state. Moreover, the benzamidine molecule alone serves as a negative allosteric modulator for BLT1. As the residues involved in the benzamidine binding are widely conserved among GPCRs, the unprecedented inverse-agonist mechanism by the benzamidine moiety could be adapted to other GPCRs. Consequently, the present structure will enable the rational development of inverse agonists specific for each GPCR.
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Affiliation(s)
- Tetsuya Hori
- RIKEN Structural Biology Laboratory, Tsurumi-ku, Yokohama, Kanagawa, Japan.,RIKEN SPring-8 Center, Sayo, Hyogo, Japan
| | - Toshiaki Okuno
- Department of Biochemistry, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Kunio Hirata
- RIKEN SPring-8 Center, Sayo, Hyogo, Japan.,Japan Science and Technology Agency, Precursory Research for Embryonic Science and Technology (PRESTO), Kawaguchi, Saitama, Japan
| | | | | | | | - Masakatsu Hato
- Division of Structural and Synthetic Biology, RIKEN Center for Life Science Technologies, Tsurumi-ku, Yokohama, Japan
| | - Motonao Nakamura
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.,Department of Life Science, Faculty of Science, Okayama University of Science, Kita-ku, Okayama, Japan
| | - Takao Shimizu
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.,Department of Lipid Signaling, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - Takehiko Yokomizo
- Department of Biochemistry, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Masashi Miyano
- RIKEN SPring-8 Center, Sayo, Hyogo, Japan.,Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, Chuo-ku, Sagamihara, Kanagawa, Japan
| | - Shigeyuki Yokoyama
- RIKEN Structural Biology Laboratory, Tsurumi-ku, Yokohama, Kanagawa, Japan
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12
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Idayu Zahid N, Anwar Ishak K, Timimi BA, Hashim R. Effect of Chain Branching on Orientational Ordering in Glycolipid Self-assembly by 2H-NMR using Extrinsic Probes. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.08.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Ishchenko A, Peng L, Zinovev E, Vlasov A, Lee SC, Kuklin A, Mishin A, Borshchevskiy V, Zhang Q, Cherezov V. Chemically Stable Lipids for Membrane Protein Crystallization. CRYSTAL GROWTH & DESIGN 2017; 17:3502-3511. [PMID: 29290736 PMCID: PMC5743208 DOI: 10.1021/acs.cgd.7b00458] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Lipidic cubic phase (LCP) has been widely recognized as a promising membrane-mimicking matrix for biophysical studies of membrane proteins and their crystallization in a lipidic environment. Application of this material to a wide variety of membrane proteins, however, is hindered due to a limited number of available host lipids, mostly monoacylglycerols (MAGs). Here, we designed, synthesized and characterized a series of chemically stable lipids resistant to hydrolysis, with properties complementary to the widely used MAGs. In order to assess their potential to serve as host lipids for crystallization, we characterized the phase properties and lattice parameters of mesophases made of two most promising lipids at a variety of different conditions by polarized light microscopy and small-angle X-ray scattering. Both lipids showed remarkable chemical stability and an extended LCP region in the phase diagram covering a wide range of temperatures down to 4 °C. One of these lipids has been used for crystallization and structure determination of a prototypical membrane protein bacteriorhodopsin at 4 °C and 20 °C.
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Affiliation(s)
- Andrii Ishchenko
- Department of Chemistry, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA
| | - Lingling Peng
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Egor Zinovev
- Laboratory for Advanced Studies of Membrane Proteins, Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia
| | - Alexey Vlasov
- Laboratory for Advanced Studies of Membrane Proteins, Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia
| | - Sung Chang Lee
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Alexander Kuklin
- Laboratory for Advanced Studies of Membrane Proteins, Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
| | - Alexey Mishin
- Laboratory for Structural Biology of GPCRs, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Valentin Borshchevskiy
- Laboratory for Advanced Studies of Membrane Proteins, Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia
- Institute of Complex Systems (ICS-6): Structural Biochemistry, Research Centre Jülich, Germany
| | - Qinghai Zhang
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Vadim Cherezov
- Department of Chemistry, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA
- Laboratory for Structural Biology of GPCRs, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
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14
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Tran N, Hawley AM, Zhai J, Muir BW, Fong C, Drummond CJ, Mulet X. High-Throughput Screening of Saturated Fatty Acid Influence on Nanostructure of Lyotropic Liquid Crystalline Lipid Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4509-4520. [PMID: 27023315 DOI: 10.1021/acs.langmuir.5b03769] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Self-assembled lyotropic liquid crystalline lipid nanoparticles have been developed for a wide range of biomedical applications with an emerging focus for use as delivery vehicles for drugs, genes, and in vivo imaging agents. In this study, we report the generation of lipid nanoparticle libraries with information regarding mesophase and lattice parameter, which can aid the selection of formulation for a particular end-use application. In this study we elucidate the phase composition parameters that influence the internal structure of lipid nanoparticles produced from monoolein, monopalmitolein and phytantriol incorporating a variety of saturated fatty acids (FA) with different chain lengths at varying concentrations and temperatures. The material libraries were established using high throughput formulation and screening techniques, including synchrotron small-angle X-ray scattering. The results demonstrate the rich polymorphism of lipid nanoparticles with nonlamellar mesophases in the presence of saturated FAs. The inclusion of saturated FAs within the lipid nanoparticles promotes a gradual phase transition at all temperatures studied toward structures with higher negative surface curvatures (e.g., from inverse bicontinuous cubic phase to hexagonal phase and then emulsified microemulsion). The three partial phase diagrams produced are discussed in terms of the influence of FA chain length and concentration on nanoparticle internal mesophase structure and lattice parameters. The study also highlights a compositionally dependent coexistence of multiple mesophases, which may indicate the presence of multicompartment nanoparticles containing cubic/cubic and cubic/hexagonal mesophases.
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Affiliation(s)
- Nhiem Tran
- CSIRO Manufacturing , Clayton, Victoria 3168 Australia
- SAXS/WAXS Beamline, Australian Synchrotron , Clayton, Victoria 3168 Australia
| | - Adrian M Hawley
- SAXS/WAXS Beamline, Australian Synchrotron , Clayton, Victoria 3168 Australia
| | - Jiali Zhai
- CSIRO Manufacturing , Clayton, Victoria 3168 Australia
| | | | - Celesta Fong
- CSIRO Manufacturing , Clayton, Victoria 3168 Australia
| | - Calum J Drummond
- CSIRO Manufacturing , Clayton, Victoria 3168 Australia
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , Melbourne, Victoria 3000 Australia
| | - Xavier Mulet
- CSIRO Manufacturing , Clayton, Victoria 3168 Australia
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15
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Expression, purification, crystallization, and preliminary X-ray crystallographic studies of the human adiponectin receptors, AdipoR1 and AdipoR2. ACTA ACUST UNITED AC 2015; 16:11-23. [PMID: 25575462 PMCID: PMC4329188 DOI: 10.1007/s10969-014-9192-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/19/2014] [Indexed: 01/21/2023]
Abstract
The adiponectin receptors (AdipoR1 and AdipoR2) are membrane proteins with seven transmembrane helices. These receptors regulate glucose and fatty acid metabolism, thereby ameliorating type 2 diabetes. The full-length human AdipoR1 and a series of N-terminally truncated mutants of human AdipoR1 and AdipoR2 were expressed in insect cells. In small-scale size exclusion chromatography, the truncated mutants AdipoR1Δ88 (residues 89–375) and AdipoR2Δ99 (residues 100–386) eluted mostly in the intact monodisperse state, while the others eluted primarily as aggregates. However, gel filtration chromatography of the large-scale preparation of the tag-affinity-purified AdipoR1Δ88 revealed the presence of an excessive amount of the aggregated state over the intact state. Since aggregation due to contaminating nucleic acids may have occurred during the sample concentration step, anion-exchange column chromatography was performed immediately after affinity chromatography, to separate the intact AdipoR1Δ88 from the aggregating species. The separated intact AdipoR1Δ88 did not undergo further aggregation, and was successfully purified to homogeneity by gel filtration chromatography. The purified AdipoR1Δ88 and AdipoR2Δ99 proteins were characterized by thermostability assays with 7-diethylamino-3-(4-maleimidophenyl)-4-methyl coumarin, thin layer chromatography of bound lipids, and surface plasmon resonance analysis of ligand binding, demonstrating their structural integrities. The AdipoR1Δ88 and AdipoR2Δ99 proteins were crystallized with the anti-AdipoR1 monoclonal antibody Fv fragment, by the lipidic mesophase method. X-ray diffraction data sets were obtained at resolutions of 2.8 and 2.4 Å, respectively.
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16
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Liew CY, Salim M, Zahid NI, Hashim R. Biomass derived xylose Guerbet surfactants: thermotropic and lyotropic properties from small-angle X-ray scattering. RSC Adv 2015. [DOI: 10.1039/c5ra17828b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel branched-chain glycosides were synthesised from xylose, an aldopentose and Guerbet alcohols whose total number of carbon atoms ranges from C8–C24. Interestingly dry β-Xyl-C8C4 gave a rectangular columnar ribbon phase at 25 °C.
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Affiliation(s)
- Chia Yen Liew
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Malinda Salim
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - N. Idayu Zahid
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Rauzah Hashim
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
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17
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Hato M, Hosaka T, Tanabe H, Kitsunai T, Yokoyama S. A new manual dispensing system for in meso membrane protein crystallization with using a stepping motor-based dispenser. ACTA ACUST UNITED AC 2014; 15:165-71. [PMID: 25056837 PMCID: PMC4125823 DOI: 10.1007/s10969-014-9187-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 07/15/2014] [Indexed: 11/15/2022]
Abstract
A reliable and easy to use manual dispensing system has been developed for the in meso membrane protein crystallization method. The system consists of a stepping motor-based dispenser with a new microsyringe system for dispensing, which allows us to deliver any desired volume of highly viscous lipidic mesophase in the range from ~50 to at least ~200 nl. The average, standard deviation, and coefficient of variation of 20 repeated deliveries of 50 nl cubic phase were comparable to those of a current robotic dispensing. Moreover, the bottom faces of boluses delivered to the glass crystallization plate were reproducibly circular in shape, and their centers were within about 100 μm from the center of the crystallization well. The system was useful for crystallizing membrane and soluble proteins in meso.
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Affiliation(s)
- Masakatsu Hato
- RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan,
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18
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Zahid NI, Conn CE, Brooks NJ, Ahmad N, Seddon JM, Hashim R. Investigation of the effect of sugar stereochemistry on biologically relevant lyotropic phases from branched-chain synthetic glycolipids by small-angle X-ray scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:15794-15804. [PMID: 24274824 DOI: 10.1021/la4040134] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Synthetic branched-chain glycolipids are suitable as model systems in understanding biological cell membranes, particularly because certain natural lipids possess chain branching. Herein, four branched-chain glycopyranosides, namely, 2-hexyl-decyl-α-D-glucopyranoside (α-Glc-OC10C6), 2-hexyl-decyl-β-D-glucopyranoside (β-Glc-OC10C6), 2-hexyl-decyl-α-D-galactopyranoside (α-Gal-OC10C6), and 2-hexyl-decyl-β-D-galactopyranoside (β-Gal-OC10C6), with a total alkyl chain length of 16 carbon atoms have been synthesized, and their phase behavior has been studied. The partial binary phase diagrams of these nonionic surfactants in water were investigated by optical polarizing microscopy (OPM) and small-angle X-ray scattering (SAXS). The introduction of chain branching in the hydrocarbon chain region is shown to result in the formation of inverse structures such as inverse hexagonal and inverse bicontinuous cubic phases. A comparison of the four compounds showed that they exhibited different polymorphism, especially in the thermotropic state, as a result of contributions from anomeric and epimeric effects according to their stereochemistry. The neat α-Glc-OC10C6 compound exhibited a lamellar (Lα) phase whereas dry α-Gal-OC10C6 formed an inverse bicontinuous cubic Ia3d (QII(G)) phase. Both β-anomers of glucoside and galactoside adopted the inverse hexagonal phase (HII) in the dry state. Generally, in the presence of water, all four glycolipids formed inverse bicontinuous cubic Ia3d (QII(G)) and Pn3m (QII(D)) phases over wide temperature and concentration ranges. The formation of inverse nonlamellar phases by these Guerbet branched-chain glycosides confirms their potential as materials for novel biotechnological applications such as drug delivery and crystallization of membrane proteins.
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Affiliation(s)
- N Idayu Zahid
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
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19
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Jacquemet A, Mériadec C, Lemiègre L, Artzner F, Benvegnu T. Stereochemical effect revealed in self-assemblies based on archaeal lipid analogues bearing a central five-membered carbocycle: a SAXS study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7591-7597. [PMID: 22546181 DOI: 10.1021/la2045948] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The relative stereochemistry (cis or trans) of a 1,3-disubstituted cyclopentane unit in the middle of tetraether archaeal bipolar lipid analogues was found to have a dramatic influence on their supramolecular self-assembly properties. SAXS studies of two synthetic diastereomeric archaeal lipids bearing two lactosyl polar head groups at opposite ends revealed different lyotropic behaviors. The cis isomer led to L(c)-L(α)-Q(II) transitions whereas the trans isomer retained an L(α) phase from 20 to 100 °C. These main differences originate from the conformational equilibrium (pseudorotation) of 1,3-disubstituted cyclopentanes. Indeed, this pseudorotation exhibits quite similar orientations of the two substituents in a trans isomer whereas several orientations of the two alkyl chains are expected in a cis-1,3-dialkyl cyclopentane, thus authorizing more conformational flexibility in the lipid packing.
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Affiliation(s)
- Alicia Jacquemet
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35708 Rennes Cedex 7, France
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20
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Kubicek J, Schlesinger R, Baeken C, Büldt G, Schäfer F, Labahn J. Controlled in meso phase crystallization--a method for the structural investigation of membrane proteins. PLoS One 2012; 7:e35458. [PMID: 22536388 PMCID: PMC3334905 DOI: 10.1371/journal.pone.0035458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 03/18/2012] [Indexed: 11/19/2022] Open
Abstract
We investigated in meso crystallization of membrane proteins to develop a fast screening technology which combines features of the well established classical vapor diffusion experiment with the batch meso phase crystallization, but without premixing of protein and monoolein. It inherits the advantages of both methods, namely (i) the stabilization of membrane proteins in the meso phase, (ii) the control of hydration level and additive concentration by vapor diffusion. The new technology (iii) significantly simplifies in meso crystallization experiments and allows the use of standard liquid handling robots suitable for 96 well formats. CIMP crystallization furthermore allows (iv) direct monitoring of phase transformation and crystallization events. Bacteriorhodopsin (BR) crystals of high quality and diffraction up to 1.3 Å resolution have been obtained in this approach. CIMP and the developed consumables and protocols have been successfully applied to obtain crystals of sensory rhodopsin II (SRII) from Halobacterium salinarum for the first time.
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Affiliation(s)
| | - Ramona Schlesinger
- Molecular Biophysics, Institute of Structural Biology and Biophysics (ISB-2), Research Center Jülich, Jülich, Germany
| | - Christian Baeken
- Molecular Biophysics, Institute of Structural Biology and Biophysics (ISB-2), Research Center Jülich, Jülich, Germany
| | - Georg Büldt
- Molecular Biophysics, Institute of Structural Biology and Biophysics (ISB-2), Research Center Jülich, Jülich, Germany
| | | | - Jörg Labahn
- Molecular Biophysics, Institute of Structural Biology and Biophysics (ISB-2), Research Center Jülich, Jülich, Germany
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21
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Fong C, Le T, Drummond CJ. Lyotropic liquid crystal engineering–ordered nanostructured small molecule amphiphileself-assembly materials by design. Chem Soc Rev 2012; 41:1297-322. [DOI: 10.1039/c1cs15148g] [Citation(s) in RCA: 235] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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22
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New amphiphiles for membrane protein structural biology. Methods 2011; 55:318-23. [PMID: 21958988 DOI: 10.1016/j.ymeth.2011.09.015] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 09/09/2011] [Accepted: 09/13/2011] [Indexed: 12/26/2022] Open
Abstract
A challenging requirement for X-ray crystallography or NMR structure determination of membrane proteins (MPs), in contrast to soluble proteins, is the necessary use of amphiphiles to mimic the hydrophobic environment of membranes. A number of new detergents, lipids and non-detergent-like amphiphiles have been developed that stabilize MPs, and these have contributed to increased success in MP structural determinations in recent years. Despite some successes, currently available reagents are inadequate and there remains a pressing need for new amphiphiles. Literature examples and some new developments are selected here as a framework for discussing desirable properties of new amphiphiles for MP structural biology.
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23
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Wada T, Shimono K, Kikukawa T, Hato M, Shinya N, Kim SY, Kimura-Someya T, Shirouzu M, Tamogami J, Miyauchi S, Jung KH, Kamo N, Yokoyama S. Crystal Structure of the Eukaryotic Light-Driven Proton-Pumping Rhodopsin, Acetabularia Rhodopsin II, from Marine Alga. J Mol Biol 2011; 411:986-98. [DOI: 10.1016/j.jmb.2011.06.028] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Accepted: 06/15/2011] [Indexed: 11/29/2022]
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24
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Cohen-Avrahami M, Libster D, Aserin A, Garti N. Sodium Diclofenac and Cell-Penetrating Peptides Embedded in HII Mesophases: Physical Characterization and Delivery. J Phys Chem B 2011; 115:10189-97. [DOI: 10.1021/jp112067v] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Marganit Cohen-Avrahami
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Dima Libster
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Abraham Aserin
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Nissim Garti
- The Ratner Chair of Chemistry, Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 91904, Israel
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25
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Cherezov V. Lipidic cubic phase technologies for membrane protein structural studies. Curr Opin Struct Biol 2011; 21:559-66. [PMID: 21775127 DOI: 10.1016/j.sbi.2011.06.007] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 06/06/2011] [Accepted: 06/21/2011] [Indexed: 10/18/2022]
Abstract
Lipidic cubic phase (LCP) is a membrane-mimetic matrix suitable for stabilization and crystallization of membrane proteins in lipidic environment. LCP technologies, however, have not been fully embraced by the membrane protein structural biology community, primarily because of the difficulties associated with handling viscous materials. Recent developments of pre-crystallization assays and improvements in crystal imaging, successes in obtaining high resolution structures of G protein-coupled receptors (GPCRs), and commercial availability of LCP tools and instruments are beginning to attract structural biologists to integrate LCP technologies in their research. This wider acceptance should translate to an increased number of otherwise difficult-to-crystallize membrane protein structures, shedding light on their functional mechanisms and on structural details of lipid-protein interactions.
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Affiliation(s)
- Vadim Cherezov
- Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
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26
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Fu Y, Weng Y, Hong WX, Zhang Q. Efficient Synthesis of Unsaturated 1-Monoacyl Glycerols for in meso Crystallization of Membrane Proteins. Synlett 2011; 2011:809-812. [PMID: 21461138 DOI: 10.1055/s-0030-1259912] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A highly efficient synthesis of unsaturated 1-monoacyl glycerols was established to fulfill the pressing need for materials that form lipidic mesophases utilized in membrane protein crystallization.
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Affiliation(s)
- Yu Fu
- Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, CB265, La Jolla, California 92037, USA
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27
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Gmajner D, Ota A, Šentjurc M, Ulrih NP. Stability of diether C25,25 liposomes from the hyperthermophilic archaeon Aeropyrum pernix K1. Chem Phys Lipids 2011; 164:236-45. [DOI: 10.1016/j.chemphyslip.2011.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 01/26/2011] [Accepted: 01/26/2011] [Indexed: 11/25/2022]
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28
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Aspects of Future R&D Regarding Targeted Lipid Nanoemulsions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/b978-0-444-53798-0.00029-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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