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Ahmed J, Mercx S, Boutry M, Chaumont F. Evolutionary and Predictive Functional Insights into the Aquaporin Gene Family in the Allotetraploid Plant Nicotiana tabacum. Int J Mol Sci 2020; 21:E4743. [PMID: 32635213 PMCID: PMC7370101 DOI: 10.3390/ijms21134743] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 12/22/2022] Open
Abstract
Aquaporins (AQPs) are a class of integral membrane proteins that facilitate the membrane diffusion of water and other small solutes. Nicotiana tabacum is an important model plant, and its allotetraploid genome has recently been released, providing us with the opportunity to analyze the AQP gene family and its evolution. A total of 88 full-length AQP genes were identified in the N. tabacum genome, and the encoding proteins were assigned into five subfamilies: 34 plasma membrane intrinsic proteins (PIPs); 27 tonoplast intrinsic proteins (TIPs); 20 nodulin26-like intrinsic proteins (NIPs); 3 small basic intrinsic proteins (SIPs); 4 uncharacterized X intrinsic proteins (XIPs), including two splice variants. We also analyzed the genomes of two N. tabacum ancestors, Nicotiana tomentosiformis and Nicotiana sylvestris, and identified 49 AQP genes in each species. Functional prediction, based on the substrate specificity-determining positions (SDPs), revealed significant differences in substrate specificity among the AQP subfamilies. Analysis of the organ-specific AQP expression levels in the N. tabacum plant and RNA-seq data of N. tabacum bright yellow-2 suspension cells indicated that many AQPs are simultaneously expressed, but differentially, according to the organs or the cells. Altogether, these data constitute an important resource for future investigations of the molecular, evolutionary, and physiological functions of AQPs in N. tabacum.
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Affiliation(s)
| | | | | | - François Chaumont
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Croix du Sud 4-L7.07.14, B-1348 Louvain-la-Neuve, Belgium; (J.A.); (S.M.); (M.B.)
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Moss FJ, Mahinthichaichan P, Lodowski DT, Kowatz T, Tajkhorshid E, Engel A, Boron WF, Vahedi-Faridi A. Aquaporin-7: A Dynamic Aquaglyceroporin With Greater Water and Glycerol Permeability Than Its Bacterial Homolog GlpF. Front Physiol 2020; 11:728. [PMID: 32695023 PMCID: PMC7339978 DOI: 10.3389/fphys.2020.00728] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 06/04/2020] [Indexed: 12/27/2022] Open
Abstract
Xenopus oocytes expressing human aquaporin-7 (AQP7) exhibit greater osmotic water permeability and 3H-glycerol uptake vs. those expressing the bacterial glycerol facilitator GlpF. AQP7-expressing oocytes exposed to increasing extracellular [glycerol] under isosmolal conditions exhibit increasing swelling rates, whereas GlpF-expressing oocytes do not swell at all. To provide a structural basis for these observed physiological differences, we performed X-ray crystallographic structure determination of AQP7 and molecular-dynamics simulations on AQP7 and GlpF. The structure reveals AQP7 tetramers containing two monomers with 3 glycerols, and two monomers with 2 glycerols in the pore. In contrast to GlpF, no glycerol is bound at the AQP7 selectivity filter (SF), comprising residues F74, G222, Y223, and R229. The AQP7 SF is resolved in its closed state because F74 blocks the passage of small solutes. Molecular dynamics simulations demonstrate that F74 undergoes large and rapid conformational changes, allowing glycerol molecules to permeate without orientational restriction. The more rigid GlpF imposes orientational constraints on glycerol molecules passing through the SF. Moreover, GlpF-W48 (analogous to AQP7-F74) undergoes rare but long-lasting conformational changes that block the pore to H2O and glycerol.
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Affiliation(s)
- Fraser J. Moss
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Paween Mahinthichaichan
- Department of Biochemistry, Center for Biophysics and Quantitative Biology, and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - David T. Lodowski
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Thomas Kowatz
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Emad Tajkhorshid
- Department of Biochemistry, Center for Biophysics and Quantitative Biology, and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Andreas Engel
- Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Walter F. Boron
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Department of Biochemistry, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Ardeschir Vahedi-Faridi
- Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
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153
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Sam A, Hartkamp R, Kumar Kannam S, Babu JS, Sathian SP, Daivis PJ, Todd BD. Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1782401] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Alan Sam
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, India
| | - Remco Hartkamp
- Process and Energy Department, Delft University of Technology, Delft, The Netherlands
| | - Sridhar Kumar Kannam
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, Australia
| | - Jeetu S. Babu
- Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India
| | - Sarith P. Sathian
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, India
| | - Peter J. Daivis
- School of Applied Sciences, RMIT University, Melbourne, Australia
| | - B. D. Todd
- Department of Mathematics, Swinburne University of Technology, Melbourne, Australia
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154
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Faize M, Fumanal B, Luque F, Ramírez-Tejero JA, Zou Z, Qiao X, Faize L, Gousset-Dupont A, Roeckel-Drevet P, Label P, Venisse JS. Genome Wild Analysis and Molecular Understanding of the Aquaporin Diversity in Olive Trees ( Olea Europaea L.). Int J Mol Sci 2020; 21:E4183. [PMID: 32545387 PMCID: PMC7312470 DOI: 10.3390/ijms21114183] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/15/2022] Open
Abstract
Cellular aquaporin water channels (AQPs) constitute a large family of transmembrane proteins present throughout all kingdoms of life, playing important roles in the uptake of water and many solutes across the membranes. In olive trees, AQP diversity, protein features and their biological functions are still largely unknown. This study focuses on the structure and functional and evolution diversity of AQP subfamilies in two olive trees, the wild species Olea europaea var. sylvestris (OeuAQPs) and the domesticated species Olea europaea cv. Picual (OleurAQPs), and describes their involvement in different physiological processes of early plantlet development and in biotic and abiotic stress tolerance in the domesticated species. A scan of genomes from the wild and domesticated olive species revealed the presence of 52 and 79 genes encoding full-length AQP sequences, respectively. Cross-genera phylogenetic analysis with orthologous clustered OleaAQPs into five established subfamilies: PIP, TIP, NIP, SIP, and XIP. Subsequently, gene structures, protein motifs, substrate specificities and cellular localizations of the full length OleaAQPs were predicted. Functional prediction based on the NPA motif, ar/R selectivity filter, Froger's and specificity-determining positions suggested differences in substrate specificities of Olea AQPs. Expression analysis of the OleurAQP genes indicates that some genes are tissue-specific, whereas few others show differential expressions at different developmental stages and in response to various biotic and abiotic stresses. The current study presents the first detailed genome-wide analysis of the AQP gene family in olive trees and it provides valuable information for further functional analysis to infer the role of AQP in the adaptation of olive trees in diverse environmental conditions in order to help the genetic improvement of domesticated olive trees.
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Affiliation(s)
- Mohamed Faize
- Laboratory of Plant Biotechnology, Ecology and Ecosystem Valorization, Faculty of Sciences, University Chouaib Doukkali, El Jadida 24000, Morocco
| | - Boris Fumanal
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France; (B.F.); (A.G.-D.); (P.R.-D.); (P.L.)
| | - Francisco Luque
- Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, University of Jaén, 23071 Jaén, Spain; (F.L.); (J.A.R.-T.)
| | - Jorge A. Ramírez-Tejero
- Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, University of Jaén, 23071 Jaén, Spain; (F.L.); (J.A.R.-T.)
| | - Zhi Zou
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan, China; (Z.Z.); (X.Q.)
| | - Xueying Qiao
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan, China; (Z.Z.); (X.Q.)
| | - Lydia Faize
- Group of Fruit Tree Biotechnology, Department of Plant Breeding, Murcia University, CEBAS CSIC, 30100 Murcia, Spain;
| | - Aurélie Gousset-Dupont
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France; (B.F.); (A.G.-D.); (P.R.-D.); (P.L.)
| | - Patricia Roeckel-Drevet
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France; (B.F.); (A.G.-D.); (P.R.-D.); (P.L.)
| | - Philippe Label
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France; (B.F.); (A.G.-D.); (P.R.-D.); (P.L.)
| | - Jean-Stéphane Venisse
- Université Clermont Auvergne, INRAE, PIAF, 63000 Clermont-Ferrand, France; (B.F.); (A.G.-D.); (P.R.-D.); (P.L.)
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155
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De Rosa A, Watson-Lazowski A, Evans JR, Groszmann M. Genome-wide identification and characterisation of Aquaporins in Nicotiana tabacum and their relationships with other Solanaceae species. BMC PLANT BIOLOGY 2020; 20:266. [PMID: 32517797 PMCID: PMC7285608 DOI: 10.1186/s12870-020-02412-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 04/28/2020] [Indexed: 05/25/2023]
Abstract
BACKGROUND Cellular membranes are dynamic structures, continuously adjusting their composition, allowing plants to respond to developmental signals, stresses, and changing environments. To facilitate transmembrane transport of substrates, plant membranes are embedded with both active and passive transporters. Aquaporins (AQPs) constitute a major family of membrane spanning channel proteins that selectively facilitate the passive bidirectional passage of substrates across biological membranes at an astonishing 108 molecules per second. AQPs are the most diversified in the plant kingdom, comprising of five major subfamilies that differ in temporal and spatial gene expression, subcellular protein localisation, substrate specificity, and post-translational regulatory mechanisms; collectively providing a dynamic transportation network spanning the entire plant. Plant AQPs can transport a range of solutes essential for numerous plant processes including, water relations, growth and development, stress responses, root nutrient uptake, and photosynthesis. The ability to manipulate AQPs towards improving plant productivity, is reliant on expanding our insight into the diversity and functional roles of AQPs. RESULTS We characterised the AQP family from Nicotiana tabacum (NtAQPs; tobacco), a popular model system capable of scaling from the laboratory to the field. Tobacco is closely related to major economic crops (e.g. tomato, potato, eggplant and peppers) and itself has new commercial applications. Tobacco harbours 76 AQPs making it the second largest characterised AQP family. These fall into five distinct subfamilies, for which we characterised phylogenetic relationships, gene structures, protein sequences, selectivity filter compositions, sub-cellular localisation, and tissue-specific expression. We also identified the AQPs from tobacco's parental genomes (N. sylvestris and N. tomentosiformis), allowing us to characterise the evolutionary history of the NtAQP family. Assigning orthology to tomato and potato AQPs allowed for cross-species comparisons of conservation in protein structures, gene expression, and potential physiological roles. CONCLUSIONS This study provides a comprehensive characterisation of the tobacco AQP family, and strengthens the current knowledge of AQP biology. The refined gene/protein models, tissue-specific expression analysis, and cross-species comparisons, provide valuable insight into the evolutionary history and likely physiological roles of NtAQPs and their Solanaceae orthologs. Collectively, these results will support future functional studies and help transfer basic research to applied agriculture.
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Affiliation(s)
- Annamaria De Rosa
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia
| | - Alexander Watson-Lazowski
- ARC Centre of Excellence for Translational Photosynthesis, Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, 2751, Australia
| | - John R Evans
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia
| | - Michael Groszmann
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia.
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156
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Ismail A, El-Sharkawy I, Sherif S. Salt Stress Signals on Demand: Cellular Events in the Right Context. Int J Mol Sci 2020; 21:ijms21113918. [PMID: 32486204 PMCID: PMC7313037 DOI: 10.3390/ijms21113918] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 12/19/2022] Open
Abstract
Plant stress is a real dilemma; it puzzles plant biologists and is a global problem that negatively affects people’s daily lives. Of particular interest is salinity, because it represents one of the major water-related stress types. We aimed to determine the signals that guide the cellular-related events where various adaptation mechanisms cross-talk to cope with salinity-related water stress in plants. In an attempt to unravel these mechanisms and introduce cellular events in the right context, we expansively discussed how salt-related signals are sensed, with particular emphasis on aquaporins, nonselective cation channels (NSCCs), and glycosyl inositol phosphorylceramide (GIPC). We also elaborated on the critical role Ca2+, H+, and ROS in mediating signal transduction pathways associated with the response and tolerance to salt stress. In addition, the fragmentary results from the literature were compiled to develop a harmonized, informational, and contemplative model that is intended to improve our perception of these adaptative mechanisms and set a common platform for plant biologists to identify intriguing research questions in this area.
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Affiliation(s)
- Ahmed Ismail
- Department of Horticulture, Faculty of Agriculture, Damanhour University, P.O. Box 22516, Damanhour, Egypt;
| | - Islam El-Sharkawy
- Florida A&M University, Center for Viticulture and Small Fruit Research. 6361 Mahan Drive, Tallahassee, FL 32308, USA;
| | - Sherif Sherif
- Alson H. Smith Jr. Agricultural Research and Extension Center, School of Plant and Environmental Sciences, Virginia Tech, Winchester, VA 22062, USA
- Correspondence: ; Tel.: +1-540-232-6035
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157
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Influence of Different Feed Physical Forms on Mandibular Gland in Growing Pigs. Animals (Basel) 2020; 10:ani10050910. [PMID: 32456363 PMCID: PMC7278392 DOI: 10.3390/ani10050910] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 12/16/2022] Open
Abstract
Simple Summary The study was carried out on growing pigs fed with different dietary treatments based on different grinding intensities and compactions of the same diet. Chewing acts are associated with salivary production and different extents of saliva fluidity also depend on the specific glycoconjugate content. Therefore, in order to have information about the modifications induced by different feed physical forms in the pig mandibular gland, the glycohistochemical profile and the presence of aquaporin 5, a channel protein modulating the saliva fluidity, were investigated. In addition, to have wider information about the apelinergic system function, presence and localization of both apelin and its receptor were studied. Findings suggest that the different mechanical stimuli in the mouth linked to different feed physical forms likely allow one to diverse physiological behavior of the pig mandibular gland. The intense chewing activity linked to the highest feed compaction and hardness promotes an increase in pig mandibular gland secretion. In addition, saliva becomes more fluid and richer in acid glycoconjugates in order to better lubricate the bolus and protect the mouth mucosae. The apelinergic system is likely involved in the above modifications enhancing both the fluidity and the quantity of serous saliva by the pig mandibular gland. Abstract A study was performed on the mandibular gland obtained from growing pigs enrolled in a wide research project aiming to test the effects of different feed physical forms on animal health, production and welfare. We used 48 pigs fed for four weeks with different dietary treatments based on different grinding intensities and compactions of the same diet, namely coarsely ground meal (CM), finely ground pelleted (FP) and coarsely ground pelleted (CP) diets. Samples were analyzed by conventional histochemistry to identify the glycohistochemical profile and by immunohistochemistry to localize aquaporin 5, apelin and apelin receptor. Statistical elaborations were performed using the Stats R-package, version 3.5.3. Pig mandibular gland adenomere increased both the quantity and acidity of produced glycoconjugates from CM to FP and CP diets. This probably calls forth higher watery saliva, thus promoting a better feed softening facilitating the amalgamation of the bolus. Mandibular gland increased aquaporin 5 positivity in the CP diet, supporting the hypothesis of an augmented demand for water. Based on apelin/receptor localization, it was hypothesized that in pig mandibular gland the apelinergic system likely performs an endocrine control on the demilunes activity and a paracrine control on ducts, facilitating the production of a more fluid saliva.
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158
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Shen J, Ye R, Romanies A, Roy A, Chen F, Ren C, Liu Z, Zeng H. Aquafoldmer-Based Aquaporin-like Synthetic Water Channel. J Am Chem Soc 2020; 142:10050-10058. [PMID: 32375470 DOI: 10.1021/jacs.0c02013] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Synthetic water channels were developed with an aim to replace aquaporins for possible uses in water purification, while concurrently retaining aquaporins' ability to conduct highly selective superfast water transport. Among the currently available synthetic water channel systems, none possesses water transport properties that parallel those of aquaporins. In this report, we present the first synthetic water channel system with intriguing aquaproin-like features. Employing a "sticky end"-mediated molecular strategy for constructing abiotic water channels, we demonstrate that a 20% enlargement in angstrom-scale pore volume could effect a remarkable enhancement in macroscopic water transport profile by 15 folds. This gives rise to a powerful synthetic water channel able to transport water at a speed of ∼3 × 109 H2O s-1 channel-1 with a high rejection of NaCl and KCl. This high water permeability, which is about 50% of aquaporin Z's capacity, makes channel 1 the fastest among the existing synthetic water channels with high selectivity.
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Affiliation(s)
- Jie Shen
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669
| | - Ruijuan Ye
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - Alyssa Romanies
- Department of Chemistry & Biochemistry and the West Center for Computational Chemistry and Drug Design, University of the Sciences in Philadelphia, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Arundhati Roy
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669
| | - Feng Chen
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669
| | - Changliang Ren
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669
| | - Zhiwei Liu
- Department of Chemistry & Biochemistry and the West Center for Computational Chemistry and Drug Design, University of the Sciences in Philadelphia, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Huaqiang Zeng
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669
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159
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Xu R, Ding L, Chen D, Liu T, Wu Y, Cao Y, Chen J, Yang F, Kang J, Xiang M. Enhancing the Chlorine Stability and Antifouling Properties of Thin-Film Composite Reverse Osmosis Membranes via Surface Grafting L-Arginine-Functionalized Polyvinyl Alcohol. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00904] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ruizhang Xu
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Lei Ding
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Dandan Chen
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Tianyu Liu
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yunqi Wu
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ya Cao
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jinyao Chen
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Feng Yang
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jian Kang
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ming Xiang
- Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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160
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Zhang C, Tian J, Qi S, Yang B, Dong Z. Highly Efficient Exclusion of Alkali Metal Ions via Electrostatic Repulsion Inside Positively Charged Channels. NANO LETTERS 2020; 20:3627-3632. [PMID: 32323993 DOI: 10.1021/acs.nanolett.0c00567] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Understanding of the structure-function relationships of natural protein channels remains a challenging task because of their unattainable physiological functions in terms of selectivity. To achieve this, a synthetic system of chemically modified channels has been constructed based on helical polymer scaffolds. Here, we report a type of positively charged channels in which multiple quaternary ammonium groups are covalently modified on the lumen surface of helical polymer while the helical conformation is intact. Compared to unmodified channels, the existence of multiple charged groups in the cavity not only makes the lumen size narrower but also essentially changes the channel properties without obstructing channel structure. Our study indicates that positively charged channels preferentially transport anions with size-dependent selectivity, whereas alkali metal ions are almost completely suppressed by electrostatic repulsion. As a consequence, a specific artificial channel with high Cl-/Na+ selectivity ratio of 41:1 is obtained.
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Affiliation(s)
- Chenyang Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Jun Tian
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Shuaiwei Qi
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Bing Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Zeyuan Dong
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
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161
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Structural insights into gap junction channels boosted by cryo-EM. Curr Opin Struct Biol 2020; 63:42-48. [PMID: 32339861 DOI: 10.1016/j.sbi.2020.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/15/2020] [Accepted: 03/15/2020] [Indexed: 11/23/2022]
Abstract
Regulating intercellular communication is essential for multicellular organisms. Gap junction channels are the major components mediating this function, but the molecular mechanisms underlying their opening and closing remain unclear. Single-particle cryo-electron microscopy (cryo-EM) is a powerful tool for investigating high-resolution protein structures that are difficult to crystallize, such as gap junction channels. Membrane protein structures are often determined in a detergent solubilized form, but lipid bilayers provide a near native environment for structural analysis. This review focuses on recent reports of gap junction channel structures visualized by cryo-EM. An overview of the differences observed in gap junction channel structures in the presence and absence of lipids is described, which may contribute to elucidating the regulation mechanisms of gap junction channel function.
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162
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Cai D, Xiong H, Zhang C, Wei F. Transport Phenomena in Zeolites in View of Graph Theory and Pseudo-Phase Transition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1901979. [PMID: 31468658 DOI: 10.1002/smll.201901979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Transport phenomena play an essential role in catalysis. While zeolite catalysis is widely applied in industrial chemical processes, its efficiency is often limited by the transport rate in the micropores of the zeolite. Experimental and theoretical methods are useful for understanding the transport phenomena on multiscale levels. Traditional diffusion models usually use a linear driving force and an isotropic continuum medium, such that transport in a hierarchical catalyst structure and the occurrence of nonlinear deactivation cannot be well understood. Due to the presence of spatial confinement and an ordered structure, some aspects of the transport in a zeolite cannot be regarded as continuum phenomena and discrete models are being developed to explain these. Graph theory and small-world networks are powerful tools that have allowed pseudo-phase transition phenomena and other nontrivial relationships to be clearly revealed. Discrete models that include graph theory can build a bridge between microscopic quantum physics and macroscopic catalyst engineering in both the space and time scales. For a fuller understanding of transport phenomena in diverse fields, several theoretical methods need to be combined for a comprehensive multiscale analysis.
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Affiliation(s)
- Dali Cai
- Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Hao Xiong
- Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Chenxi Zhang
- Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
| | - Fei Wei
- Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China
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163
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Perez Sirkin YA, Szleifer I, Tagliazucchi M. Voltage-Triggered Structural Switching of Polyelectrolyte-Modified Nanochannels. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00082] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yamila A. Perez Sirkin
- INQUIMAE-CONICET and DQIAQF, University of Buenos Aires, School of Sciences, Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires C1428EHA, Argentina
| | - Igal Szleifer
- Department of Biomedical Engineering, Department of Chemistry and Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Mario Tagliazucchi
- INQUIMAE-CONICET and DQIAQF, University of Buenos Aires, School of Sciences, Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires C1428EHA, Argentina
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164
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Xu R, Wang J, Chen D, Liu T, Zheng Z, Yang F, Chen J, Kang J, Cao Y, Xiang M. Preparation and performance of a charge-mosaic nanofiltration membrane with novel salt concentration sensitivity for the separation of salts and dyes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117472] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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165
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Pommerrenig B, Diehn TA, Bernhardt N, Bienert MD, Mitani-Ueno N, Fuge J, Bieber A, Spitzer C, Bräutigam A, Ma JF, Chaumont F, Bienert GP. Functional evolution of nodulin 26-like intrinsic proteins: from bacterial arsenic detoxification to plant nutrient transport. THE NEW PHYTOLOGIST 2020; 225:1383-1396. [PMID: 31550387 DOI: 10.1111/nph.16217] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 09/17/2019] [Indexed: 05/18/2023]
Abstract
Nodulin 26-like intrinsic proteins (NIPs) play essential roles in transporting the nutrients silicon and boron in seed plants, but the evolutionary origin of this transport function and the co-permeability to toxic arsenic remains enigmatic. Horizontal gene transfer of a yet uncharacterised bacterial AqpN-aquaporin group was the starting-point for plant NIP evolution. We combined intense sequence, phylogenetic and genetic context analyses and a mutational approach with various transport assays in oocytes and plants to resolve the transorganismal and functional evolution of bacterial and algal and terrestrial plant NIPs and to reveal their molecular transport specificity features. We discovered that aqpN genes are prevalently located in arsenic resistance operons of various prokaryotic phyla. We provided genetic and functional evidence that these proteins contribute to the arsenic detoxification machinery. We identified NIPs with the ancestral bacterial AqpN selectivity filter composition in algae, liverworts, moss, hornworts and ferns and demonstrated that these archetype plant NIPs and their prokaryotic progenitors are almost impermeable to water and silicon but transport arsenic and boron. With a mutational approach, we demonstrated that during evolution, ancestral NIP selectivity shifted to allow subfunctionalisations. Together, our data provided evidence that evolution converted bacterial arsenic efflux channels into essential seed plant nutrient transporters.
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Affiliation(s)
- Benjamin Pommerrenig
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
- Division of Plant Physiology, University Kaiserslautern, 67663, Kaiserslautern, Germany
| | - Till A Diehn
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Nadine Bernhardt
- Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Manuela D Bienert
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Namiki Mitani-Ueno
- Institute of Plant Science and Resources, Okayama University, 710-0046, Kurashiki, Japan
| | - Jacqueline Fuge
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Annett Bieber
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Christoph Spitzer
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
| | - Andrea Bräutigam
- Computational Biology, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, 710-0046, Kurashiki, Japan
| | - François Chaumont
- Louvain Institute of Biomolecular Science and Technology, UC Louvain, 1348, Louvain-la-Neuve, Belgium
| | - Gerd P Bienert
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466, Gatersleben, Germany
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166
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Semmler ML, Bekeschus S, Schäfer M, Bernhardt T, Fischer T, Witzke K, Seebauer C, Rebl H, Grambow E, Vollmar B, Nebe JB, Metelmann HR, von Woedtke T, Emmert S, Boeckmann L. Molecular Mechanisms of the Efficacy of Cold Atmospheric Pressure Plasma (CAP) in Cancer Treatment. Cancers (Basel) 2020; 12:cancers12020269. [PMID: 31979114 PMCID: PMC7072164 DOI: 10.3390/cancers12020269] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/16/2020] [Accepted: 01/20/2020] [Indexed: 12/30/2022] Open
Abstract
Recently, the potential use of cold atmospheric pressure plasma (CAP) in cancer treatment has gained increasing interest. Especially the enhanced selective killing of tumor cells compared to normal cells has prompted researchers to elucidate the molecular mechanisms for the efficacy of CAP in cancer treatment. This review summarizes the current understanding of how CAP triggers intracellular pathways that induce growth inhibition or cell death. We discuss what factors may contribute to the potential selectivity of CAP towards cancer cells compared to their non-malignant counterparts. Furthermore, the potential of CAP to trigger an immune response is briefly discussed. Finally, this overview demonstrates how these concepts bear first fruits in clinical applications applying CAP treatment in head and neck squamous cell cancer as well as actinic keratosis. Although significant progress towards understanding the underlying mechanisms regarding the efficacy of CAP in cancer treatment has been made, much still needs to be done with respect to different treatment conditions and comparison of malignant and non-malignant cells of the same cell type and same donor. Furthermore, clinical pilot studies and the assessment of systemic effects will be of tremendous importance towards bringing this innovative technology into clinical practice.
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Affiliation(s)
- Marie Luise Semmler
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), 17489 Greifswald, Germany; (S.B.); (T.v.W.)
| | - Mirijam Schäfer
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Thoralf Bernhardt
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Tobias Fischer
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Katharina Witzke
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Christian Seebauer
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Henrike Rebl
- Department of Cell Biology, University Medical Center Rostock, 18057 Rostock, Germany; (H.R.); (J.B.N.)
| | - Eberhard Grambow
- Institute for Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (E.G.); (B.V.)
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, 18057 Rostock, Germany; (E.G.); (B.V.)
| | - J. Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, 18057 Rostock, Germany; (H.R.); (J.B.N.)
| | - Hans-Robert Metelmann
- Oral & Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, 17489 Greifswald, Germany; (K.W.); (C.S.)
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), 17489 Greifswald, Germany; (S.B.); (T.v.W.)
| | - Steffen Emmert
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
| | - Lars Boeckmann
- Clinic and Polyclinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany; (M.L.S.); (M.S.); (T.B.); (T.F.); (S.E.)
- Correspondence: ; Tel.: +49-381-494-9760
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167
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Zhu Z, Chang C, Shu Y, Song B. Transition to a Superpermeation Phase of Confined Water Induced by a Terahertz Electromagnetic Wave. J Phys Chem Lett 2020; 11:256-262. [PMID: 31855440 DOI: 10.1021/acs.jpclett.9b03228] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Excellent permeation of one-dimensional (1-D) confined water across membrane channels is implicated in physiological processes and widely inspires the design of novel nanodevices and materials. Here, through molecular dynamics simulations, we proposed a phase transition to superpermeation (approximately 1 order of magnitude enhancement) of confined water across a 1-D water channel caused by a terahertz electromagnetic stimulus with a limited thermal effect. The underlying mechanism is revealed to be a combination of strength matching and frequency resonance between a relatively weak stimulus and the hydrogen bond network of 1-D confined water, rather than the bulk water outside. This combination causes an anomalously structural phase transition of only the confined water while efficiently limiting the thermal effect of bulk water. Our findings are promising for promoting the developments of advanced nanofluidic systems and terahertz technology and even physiological research.
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Affiliation(s)
- Zhi Zhu
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab of Modern Optical System, Terahertz Science Cooperative Innovation Center, School of Optical-Electrical Computer Engineering , University of Shanghai for Science and Technology , Shanghai 200093 , China
| | - Chao Chang
- Innovation Laboratory of Terahertz Biophysics , National Innovation Institute of Defense Technology , Beijing 100071 , China
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education , Xi'an Jiaotong University , Xi'an 710049 , China
| | - Yousheng Shu
- State Key Laboratory of Medical Neurobiology, Institute for Translational Brain Research, MOE Frontier Center for Brain Science, Department of Neurology, Huashan Hospital , Fudan University , Shanghai 200032 , China
| | - Bo Song
- Terahertz Technology Innovation Research Institute, Shanghai Key Lab of Modern Optical System, Terahertz Science Cooperative Innovation Center, School of Optical-Electrical Computer Engineering , University of Shanghai for Science and Technology , Shanghai 200093 , China
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168
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Applegate LC, Forbes TZ. Controlling water structure and behavior: design principles from metal organic nanotubular materials. CrystEngComm 2020. [DOI: 10.1039/d0ce00331j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water exhibits unique and unexpected behavioral and structural changes when confined to the nanoscale, notably within the pores of metal–organic nanotubes.
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169
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Hussain A, Tanveer R, Mustafa G, Farooq M, Amin I, Mansoor S. Comparative phylogenetic analysis of aquaporins provides insight into the gene family expansion and evolution in plants and their role in drought tolerant and susceptible chickpea cultivars. Genomics 2020; 112:263-275. [DOI: 10.1016/j.ygeno.2019.02.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/21/2019] [Accepted: 02/07/2019] [Indexed: 12/16/2022]
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170
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Padhi S, Priyakumar UD. Selectivity and transport in aquaporins from molecular simulation studies. VITAMINS AND HORMONES 2020; 112:47-70. [DOI: 10.1016/bs.vh.2019.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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171
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172
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Yang CP, Tsai HY, Tseng CL, Hao PJ, Liu YC. Strategy on Persisting in Distinct Activity of Plasmon-Activated Water. ACS OMEGA 2019; 4:21197-21203. [PMID: 31867513 PMCID: PMC6921674 DOI: 10.1021/acsomega.9b02627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
The innovative plasmon-activated water (PAW) with reduced hydrogen bonds exhibits intrinsically distinct properties at room temperature, which are significantly different from the properties of untreated conventional deionized (DI) water. Examples of this are their ability to scavenge free radicals and higher vapor pressure. However, distinct properties of energetic PAW decay within the day after its creation in a metastable liquid state. In this work, we report a facile method for persisting its distinct activities by letting as-prepared PAW be quickly frozen in liquid nitrogen and letting the frozen PAW (for one month before further measurements) be quickly melted to room temperature in a warm-water bath (called treated PAW). Experimental results indicate that the activity of the higher evaporation rate of treated PAW compared to DI water can be maintained ca. 90% of magnitude, as compared to the as-prepared PAW. Also, its abilities to scavenge free hydroxyl and 2,2-diphenyl-1-picrylhydrazyl radicals can be maintained at ca. 70 and 80% of magnitudes, respectively. Moreover, this strategy of quickly freezing and melting treatments to PAW on persisting in distinct activity of PAW is effective in oxygen evolution reactions. This promises the stored energy and the distinct property of created liquid PAW being available in water-related fields after long-term storage.
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Affiliation(s)
- Chih-Ping Yang
- Department
of Biochemistry and Molecular Cell Biology, School of
Medicine, College of Medicine, Graduate Institute of Biomedical Materials
and Tissue Engineering, College of Biomedical Engineering, Graduate Institute
of Medical Science, College of Medicine, and Cell Physiology and Molecular Image
Research Center, Wan Fang Hospital, Taipei
Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Hui-Yen Tsai
- Department
of Biochemistry and Molecular Cell Biology, School of
Medicine, College of Medicine, Graduate Institute of Biomedical Materials
and Tissue Engineering, College of Biomedical Engineering, Graduate Institute
of Medical Science, College of Medicine, and Cell Physiology and Molecular Image
Research Center, Wan Fang Hospital, Taipei
Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Ching-Li Tseng
- Department
of Biochemistry and Molecular Cell Biology, School of
Medicine, College of Medicine, Graduate Institute of Biomedical Materials
and Tissue Engineering, College of Biomedical Engineering, Graduate Institute
of Medical Science, College of Medicine, and Cell Physiology and Molecular Image
Research Center, Wan Fang Hospital, Taipei
Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Pei-Jun Hao
- Department
of Biochemistry and Molecular Cell Biology, School of
Medicine, College of Medicine, Graduate Institute of Biomedical Materials
and Tissue Engineering, College of Biomedical Engineering, Graduate Institute
of Medical Science, College of Medicine, and Cell Physiology and Molecular Image
Research Center, Wan Fang Hospital, Taipei
Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Yu-Chuan Liu
- Department
of Biochemistry and Molecular Cell Biology, School of
Medicine, College of Medicine, Graduate Institute of Biomedical Materials
and Tissue Engineering, College of Biomedical Engineering, Graduate Institute
of Medical Science, College of Medicine, and Cell Physiology and Molecular Image
Research Center, Wan Fang Hospital, Taipei
Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
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173
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Chauvigné F, Yilmaz O, Ferré A, Fjelldal PG, Finn RN, Cerdà J. The vertebrate Aqp14 water channel is a neuropeptide-regulated polytransporter. Commun Biol 2019; 2:462. [PMID: 31840107 PMCID: PMC6906440 DOI: 10.1038/s42003-019-0713-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 11/26/2019] [Indexed: 12/18/2022] Open
Abstract
Water channels (aquaporins) were originally discovered in mammals with fourteen subfamilies now identified (AQP0-13). Here we show that a functional Aqp14 subfamily phylogenetically related to AQP4-type channels exists in all vertebrate lineages except hagfishes and eutherian mammals. In contrast to the water-selective classical aquaporins, which have four aromatic-arginine constriction residues, Aqp14 proteins present five non-aromatic constriction residues and facilitate the permeation of water, urea, ammonia, H2O2 and glycerol. Immunocytochemical assays suggest that Aqp14 channels play important osmoregulatory roles in piscine seawater adaptation. Our data indicate that Aqp14 intracellular trafficking is tightly regulated by the vasotocinergic/isotocinergic neuropeptide and receptor systems, whereby protein kinase C and A transduction pathways phosphorylate highly conserved C-terminal residues to control channel plasma membrane insertion. The neuropeptide regulation of Aqp14 channels thus predates the vasotocin/vasopressin regulation of AQP2-5-6 orthologs observed in tetrapods. These findings demonstrate that vertebrate Aqp14 channels represent an ancient subfamily of neuropeptide-regulated polytransporters.
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Affiliation(s)
- François Chauvigné
- IRTA-Institute of Biotechnology and Biomedicine (IBB), Universitat Autònoma de Barcelona, 08193 Bellaterra, (Cerdanyola del Vallès) Spain
| | - Ozlem Yilmaz
- Department of Biological Sciences, Bergen High Technology Centre, University of Bergen, 5020 Bergen, Norway
| | - Alba Ferré
- IRTA-Institute of Biotechnology and Biomedicine (IBB), Universitat Autònoma de Barcelona, 08193 Bellaterra, (Cerdanyola del Vallès) Spain
| | - Per Gunnar Fjelldal
- Institute of Marine Research, Matre Aquaculture Research Station, 5984 Matredal, Norway
| | - Roderick Nigel Finn
- IRTA-Institute of Biotechnology and Biomedicine (IBB), Universitat Autònoma de Barcelona, 08193 Bellaterra, (Cerdanyola del Vallès) Spain
- Department of Biological Sciences, Bergen High Technology Centre, University of Bergen, 5020 Bergen, Norway
| | - Joan Cerdà
- IRTA-Institute of Biotechnology and Biomedicine (IBB), Universitat Autònoma de Barcelona, 08193 Bellaterra, (Cerdanyola del Vallès) Spain
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174
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Chen F, Shen J, Li N, Roy A, Ye R, Ren C, Zeng H. Pyridine/Oxadiazole-Based Helical Foldamer Ion Channels with Exceptionally High K + /Na + Selectivity. Angew Chem Int Ed Engl 2019; 59:1440-1444. [PMID: 31584221 DOI: 10.1002/anie.201906341] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/18/2019] [Indexed: 01/12/2023]
Abstract
Protein channels are characterized by high transport selectivity, which is essential for maintaining cellular function. Efforts to reproduce such high selectivity over the past four decades have not been very successful. We report a novel series of aromatic foldamer-based polymeric channels where the backbone is stabilized by differential electrostatic repulsions among heteroatoms helically arrayed along the helical backbone. Nanotubes averaging 2.3 and 2.7 nm in length mediate highly efficient transport of K+ ions as a consequence of hydrophilic electron-rich hollow cavities that are 3 Å in diameter. Exceptionally high K+ and Na+ selectivity values of 16.3 and 12.6, respectively, are achieved.
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Affiliation(s)
- Feng Chen
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Jie Shen
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Ning Li
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Arundhati Roy
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Ruijuan Ye
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore
| | - Changliang Ren
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
| | - Huaqiang Zeng
- The NanoBio Lab, 31 Biopolis Way, The Nanos, Singapore, 138669, Singapore
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175
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Chen F, Shen J, Li N, Roy A, Ye R, Ren C, Zeng H. Pyridine/Oxadiazole‐Based Helical Foldamer Ion Channels with Exceptionally High K
+
/Na
+
Selectivity. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906341] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Feng Chen
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Jie Shen
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Ning Li
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Arundhati Roy
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Ruijuan Ye
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117585 Singapore
| | - Changliang Ren
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Huaqiang Zeng
- The NanoBio Lab 31 Biopolis Way, The Nanos Singapore 138669 Singapore
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176
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Active DNA unwinding and transport by a membrane-adapted helicase nanopore. Nat Commun 2019; 10:5083. [PMID: 31704937 PMCID: PMC6841704 DOI: 10.1038/s41467-019-13047-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 10/14/2019] [Indexed: 02/05/2023] Open
Abstract
Nanoscale transport through nanopores and live-cell membranes plays a vital role in both key biological processes as well as biosensing and DNA sequencing. Active translocation of DNA through these nanopores usually needs enzyme assistance. Here we present a nanopore derived from truncated helicase E1 of bovine papillomavirus (BPV) with a lumen diameter of c.a. 1.3 nm. Cryogenic electron microscopy (cryo-EM) imaging and single channel recording confirm its insertion into planar lipid bilayer (BLM). The helicase nanopore in BLM allows the passive single-stranded DNA (ssDNA) transport and retains the helicase activity in vitro. Furthermore, we incorporate this helicase nanopore into the live cell membrane of HEK293T cells, and monitor the ssDNA delivery into the cell real-time at single molecule level. This type of nanopore is expected to provide an interesting tool to study the biophysics of biomotors in vitro, with potential applications in biosensing, drug delivery and real-time single cell analysis. Active translocation of DNA through nanopores usually needs enzyme assistance. Here authors present a nanopore derived from helicase E1 of bovine papillomavirus (BPV) which acts as a conductive pore embedded in lipid membrane to allow the translocation of ssDNA and unwinding of dsDNA.
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177
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Temperature-dependent viscosity dominated transport control through AQP1 water channel. J Theor Biol 2019; 480:92-98. [PMID: 31400345 DOI: 10.1016/j.jtbi.2019.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 07/26/2019] [Accepted: 08/06/2019] [Indexed: 11/21/2022]
Abstract
We give a supplementary explanation for previous results about the exclusion of proton as well as hydronium (ion) transport through aquaporins (AQP1) via verified transition state theory by calculating the temperature-dependent viscosity for proton or hydronium (ion) transport through AQP1. We will demonstrate the temperature-dependent viscosity dominated transport control in AQP1 via the selected activation energy as well as the activation volume considering the presumed wavy-roughness along the sub-nano domains. Our numerical results show that once proton or hydronium (ion) transport through AQP1 at room temperature behaves like a molecular fluid with a relatively high viscosity, such as pitch, then proton or hydronium (ion) transport through AQP1 will be blocked (like a solid). Otherwise, proton or hydronium (ion) transport through AQP1 at room temperature manifests like a molecular fluid with a correspondingly lower viscosity, such as water (H2O), and then exclusion of proton or hydronium (ion) through AQP1 will not occur. We also demonstrate possible size effect in blocking proton or hydronium (ion) transport through AQP1. Our predicted results are new and novel as there are no temperature-dependent viscosity measurements relevant to AQP1 yet.
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178
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Wu X, Cui X, Wu W, Wang J, Li Y, Jiang Z. Elucidating Ultrafast Molecular Permeation through Well‐Defined 2D Nanochannels of Lamellar Membranes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912570] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xiaoli Wu
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Xulin Cui
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Wenjia Wu
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Jingtao Wang
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
- Henan Institutes of Advanced TechnologyZhengzhou University 97 Wenhua Road Zhengzhou 450003 P. R. China
| | - Yifan Li
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Zhongyi Jiang
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
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179
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Wu X, Cui X, Wu W, Wang J, Li Y, Jiang Z. Elucidating Ultrafast Molecular Permeation through Well‐Defined 2D Nanochannels of Lamellar Membranes. Angew Chem Int Ed Engl 2019; 58:18524-18529. [DOI: 10.1002/anie.201912570] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaoli Wu
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Xulin Cui
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Wenjia Wu
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Jingtao Wang
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
- Henan Institutes of Advanced TechnologyZhengzhou University 97 Wenhua Road Zhengzhou 450003 P. R. China
| | - Yifan Li
- School of Chemical EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Zhongyi Jiang
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
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180
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Pfeil-Gardiner O, Mills DJ, Vonck J, Kuehlbrandt W. A comparative study of single-particle cryo-EM with liquid-nitrogen and liquid-helium cooling. IUCRJ 2019; 6:1099-1105. [PMID: 31709065 PMCID: PMC6830223 DOI: 10.1107/s2052252519011503] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 08/16/2019] [Indexed: 05/06/2023]
Abstract
Radiation damage is the most fundamental limitation for achieving high resolution in electron cryo-microscopy (cryo-EM) of biological samples. The effects of radiation damage are reduced by liquid-helium cooling, although the use of liquid helium is more challenging than that of liquid nitrogen. To date, the benefits of liquid-nitrogen and liquid-helium cooling for single-particle cryo-EM have not been compared quantitatively. With recent technical and computational advances in cryo-EM image recording and processing, such a comparison now seems timely. This study aims to evaluate the relative merits of liquid-helium cooling in present-day single-particle analysis, taking advantage of direct electron detectors. Two data sets for recombinant mouse heavy-chain apoferritin cooled with liquid-nitrogen or liquid-helium to 85 or 17 K were collected, processed and compared. No improvement in terms of resolution or Coulomb potential map quality was found for liquid-helium cooling. Interestingly, beam-induced motion was found to be significantly higher with liquid-helium cooling, especially within the most valuable first few frames of an exposure, thus counteracting any potential benefit of better cryoprotection that liquid-helium cooling may offer for single-particle cryo-EM.
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Affiliation(s)
- Olivia Pfeil-Gardiner
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438 Frankfurt, Germany
| | - Deryck J. Mills
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438 Frankfurt, Germany
| | - Janet Vonck
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438 Frankfurt, Germany
| | - Werner Kuehlbrandt
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438 Frankfurt, Germany
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181
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Liu Y, Vashisth H. Conformational dynamics and interfacial interactions of peptide-appended pillar[5]arene water channels in biomimetic membranes. Phys Chem Chem Phys 2019; 21:22711-22721. [PMID: 31454001 DOI: 10.1039/c9cp04408f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Peptide appended pillar[5]arene (PAP) is an artificial water channel resembling biological water channel proteins, which has shown a significant potential for designing bioinspired water purification systems. Given that PAP channels need to be incorporated at a high density in membrane matrices, it is critical to examine the role of channel-channel and channel-membrane interactions in governing the structural and functional characteristics of channels. To resolve the atomic-scale details of these interactions, we have carried out atomistic molecular dynamics (MD) simulations of multiple PAP channels inserted in a lipid or a block-copolymer (BCP) membrane matrix. Classical MD simulations on a sub-microsecond timescale showed clustering of channels only in the lipid membrane, but enhanced sampling MD simulations showed thermodynamically-favorable dimerized states of channels in both lipid and BCP membranes. The dimerized configurations of channels, with an extensive buried surface area, were stabilized via interactions between the aromatic groups in the peptide arms of neighboring channels. The conformational metrics characterizing the orientational and structural changes in channels revealed a higher flexibility in the lipid membrane as opposed to the BCP membrane although hydrogen bonds between the channel and the membrane molecules were not a major contributor to the stability of channels in the BCP membrane. We also found that the channels undergo wetting/dewetting transitions in both lipid and BCP membranes with a marginally higher probability of undergoing a dewetting transition in the BCP membrane. Collectively, these results highlight the role of channel dynamics in governing channel-channel and channel-membrane interfacial interactions, and provide atomic-scale insights needed to design stable and functional biomimetic membranes for efficient separations.
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Affiliation(s)
- Yong Liu
- Department of Chemical Engineering, University of New Hampshire, 33 Academic Way, Durham, NH 03824, USA.
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182
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Abstract
Aquaporins are integral membrane proteins that facilitate the diffusion of water and other small, uncharged solutes across the cellular membrane and are widely distributed in organisms from humans to bacteria. However, the characteristics of prokaryotic aquaporins remain largely unknown. We investigated the distribution and sequence characterization of aquaporins in prokaryotic organisms and summarized the transport characteristics, physiological functions, and regulatory mechanisms of prokaryotic aquaporins. Aquaporin homologues were identified in 3315 prokaryotic genomes retrieved from the Kyoto Encyclopedia of Genes and Genomes (KEGG) database, but the protein clustering pattern is not completely congruent with the phylogeny of the species that carry them. Moreover, prokaryotic aquaporins display diversified aromatic/arginine constriction region (ar/R) amino acid compositions, implying multiple functions. The typical water and glycerol transport characterization, physiological functions, and regulations have been extensively studied in Escherichia coli AqpZ and GlpF. A Streptococcus aquaporin has recently been verified to facilitate the efflux of endogenous H2O2, which not only contributes to detoxification but also to species competitiveness, improving our understanding of prokaryotic aquaporins. Furthermore, recent studies revealed novel regulatory mechanisms of prokaryotic aquaporins at post-translational level. Thus, we propose that intensive investigation on prokaryotic aquaporins would extend the functional categories and working mechanisms of these ubiquitous, intrinsic membrane proteins.
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183
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Skowronska A, Tanski D, Jaskiewicz L, Skowronski MT. Modulation by steroid hormones and other factors on the expression of aquaporin-1 and aquaporin-5. VITAMINS AND HORMONES 2019; 112:209-242. [PMID: 32061342 DOI: 10.1016/bs.vh.2019.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- A Skowronska
- Department of Human Physiology, School of Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
| | - D Tanski
- Department of Anatomy and Animal Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - L Jaskiewicz
- Department of Human Physiology, School of Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - M T Skowronski
- Veterinary Center, University of Nicolaus Copernicus, Torun, Poland
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184
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Zhao Y, Chen J, Huang D, Su J. The Role of Interface Ions in the Control of Water Transport through a Carbon Nanotube. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13442-13451. [PMID: 31539260 DOI: 10.1021/acs.langmuir.9b01750] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Controlling the water transport toward a given direction is still challenging, particularly due to thermal fluctuations of water motion at the nanoscale. While most of the previous works focus on the symmetric hydrophobic membrane systems, the role of the membrane in affecting the water transport remains largely unexplored. In this work, by using extensive molecular dynamics simulations, we find an interesting electropumping phenomenon, that is, the flowing counterions on an asymmetric hydrophobic-hydrophilic membrane can significantly drive the single-file water transport through a carbon nanotube, suggesting a nanometer water pump in a highly controllable fashion. The ion-water coupling motion in electric fields on the charged surface provides an indirect driving force for this pumping phenomenon. The water dynamics and thermal dynamics demonstrate a unique behavior with the change in electric fields, surface charge density, and even charge species. Particularly, due to the ion flux bifurcation for the positive and negative surfaces, the water dynamics such as the water flow, flux, and translocation time also exhibit similar asymmetry. Surprisingly, the positive surface charge induces an abnormal three-peak dipole distribution for the confined water and subsequent high flipping frequency. This can be attributed to the competition between the surface charge and interface water orientation on it. Our results indicate a new strategy to pump water through a nanochannel, making use of the counterion flowing on an asymmetric charged membrane, which are promising for future studies.
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Affiliation(s)
- Yunzhen Zhao
- Department of Applied Physics , Nanjing University of Science and Technology , Nanjing , Jiangsu 210094 , China
| | - Jingyi Chen
- School of Material Science and Engineering , Zhejiang University of Technology , Hangzhou , Zhejiang 310014 , China
| | - Decai Huang
- Department of Applied Physics , Nanjing University of Science and Technology , Nanjing , Jiangsu 210094 , China
| | - Jiaye Su
- Department of Applied Physics , Nanjing University of Science and Technology , Nanjing , Jiangsu 210094 , China
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185
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Bezerra-Neto JP, de Araújo FC, Ferreira-Neto JRC, da Silva MD, Pandolfi V, Aburjaile FF, Sakamoto T, de Oliveira Silva RL, Kido EA, Barbosa Amorim LL, Ortega JM, Benko-Iseppon AM. Plant Aquaporins: Diversity, Evolution and Biotechnological Applications. Curr Protein Pept Sci 2019; 20:368-395. [PMID: 30387391 DOI: 10.2174/1389203720666181102095910] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 12/20/2022]
Abstract
The plasma membrane forms a permeable barrier that separates the cytoplasm from the external environment, defining the physical and chemical limits in each cell in all organisms. The movement of molecules and ions into and out of cells is controlled by the plasma membrane as a critical process for cell stability and survival, maintaining essential differences between the composition of the extracellular fluid and the cytosol. In this process aquaporins (AQPs) figure as important actors, comprising highly conserved membrane proteins that carry water, glycerol and other hydrophilic molecules through biomembranes, including the cell wall and membranes of cytoplasmic organelles. While mammals have 15 types of AQPs described so far (displaying 18 paralogs), a single plant species can present more than 120 isoforms, providing transport of different types of solutes. Such aquaporins may be present in the whole plant or can be associated with different tissues or situations, including biotic and especially abiotic stresses, such as drought, salinity or tolerance to soils rich in heavy metals, for instance. The present review addresses several aspects of plant aquaporins, from their structure, classification, and function, to in silico methodologies for their analysis and identification in transcriptomes and genomes. Aspects of evolution and diversification of AQPs (with a focus on plants) are approached for the first time with the aid of the LCA (Last Common Ancestor) analysis. Finally, the main practical applications involving the use of AQPs are discussed, including patents and future perspectives involving this important protein family.
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Affiliation(s)
- João P Bezerra-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flávia Czekalski de Araújo
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - José R C Ferreira-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Manassés D da Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Valesca Pandolfi
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flavia F Aburjaile
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Tetsu Sakamoto
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Roberta L de Oliveira Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Ederson A Kido
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Lidiane L Barbosa Amorim
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia do Piauí, Campus Oeiras, Avenida Projetada, s/n, 64.500-000, Oeiras, Piauí, Brazil
| | - José M Ortega
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Ana M Benko-Iseppon
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
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186
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Bestetti S, Galli M, Sorrentino I, Pinton P, Rimessi A, Sitia R, Medraño-Fernandez I. Human aquaporin-11 guarantees efficient transport of H 2O 2 across the endoplasmic reticulum membrane. Redox Biol 2019; 28:101326. [PMID: 31546170 PMCID: PMC6812059 DOI: 10.1016/j.redox.2019.101326] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/03/2019] [Accepted: 09/07/2019] [Indexed: 01/09/2023] Open
Abstract
Hydrogen peroxide (H2O2) is an essential second intracellular messenger. To reach its targets in the cytosol, H2O2 must cross a membrane, a feat that requires aquaporins (AQP) endowed with ‘peroxiporin’ activity (AQP3, AQP8, AQP9). Here, we exploit different organelle-targeted H2O2-sensitive probes to show that also AQP11 efficiently conduits H2O2. Unlike other peroxiporins, AQP11 is localized in the endoplasmic reticulum (ER), accumulating partly in mitochondrial-associated ER membranes (MAM). Its downregulation severely perturbs the flux of H2O2 through the ER, but not through the mitochondrial or plasma membranes. These properties make AQP11 a potential regulator of ER redox homeostasis and signaling. AQP11 is an endoplasmic reticulum (ER)-resident peroxiporin. AQP11 allows H2O2 fluxes across the ER membrane. Its levels impact ER redox homeostasis.
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Affiliation(s)
- Stefano Bestetti
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132, Milan, Italy
| | - Mauro Galli
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132, Milan, Italy
| | - Ilaria Sorrentino
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132, Milan, Italy
| | - Paolo Pinton
- Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121, Ferrara, Italy
| | - Alessandro Rimessi
- Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121, Ferrara, Italy
| | - Roberto Sitia
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132, Milan, Italy.
| | - Iria Medraño-Fernandez
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132, Milan, Italy.
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187
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Root water uptake and its pathways across the root: quantification at the cellular scale. Sci Rep 2019; 9:12979. [PMID: 31506538 PMCID: PMC6737181 DOI: 10.1038/s41598-019-49528-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/27/2019] [Indexed: 11/09/2022] Open
Abstract
The pathways of water across root tissues and their relative contribution to plant water uptake remain debated. This is mainly due to technical challenges in measuring water flux non-invasively at the cellular scale under realistic conditions. We developed a new method to quantify water fluxes inside roots growing in soils. The method combines spatiotemporal quantification of deuterated water distribution imaged by rapid neutron tomography with an inverse simulation of water transport across root tissues. Using this non-invasive technique, we estimated for the first time the in-situ radial water fluxes [m s−1] in apoplastic and cell-to-cell pathways. The water flux in the apoplast of twelve days-old lupins (Lupinus albus L. cv. Feodora) was seventeen times faster than in the cell-to-cell pathway. Hence, the overall contribution of the apoplast in water flow [m3 s−1] across the cortex is, despite its small volume of 5%, as large as 57 ± 8% (Mean ± SD for n = 3) of the total water flow. This method is suitable to non-invasively measure the response of cellular scale root hydraulics and water fluxes to varying soil and climate conditions.
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188
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Rivera MA, Fahey TD. Association Between aquaporin-1 and Endurance Performance: A Systematic Review. SPORTS MEDICINE-OPEN 2019; 5:40. [PMID: 31486928 PMCID: PMC6728102 DOI: 10.1186/s40798-019-0213-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 08/19/2019] [Indexed: 12/28/2022]
Abstract
Background There is abundant and mounting information related to the molecular and biological structure and function of the Aquaporin-1 (AQP1) gene and the AQP1-Aquaporin channel. Regulation of water flow across cell membranes is essential for supporting inter- and intracellular fluid balance, which is critical for health and exercise performance. The transmembrane water channel AQP1 is important for cardiorespiratory endurance (CE) because it influences fluid transfers in erythrocytes, endothelial, and pulmonary cells and is vital for transport of ammonium, bicarbonate, carbon dioxide, glycerol, nitric oxide, potassium ion, water, and trans-epithelial and renal water. Very recent publications suggest the association between a DNA sequence variant, rs1049305 (C > G), in the 3′-untranslated region of the AQP1 gene and CE performance. Other reports indicate further significant associations between AQP1 channel and CE phenotypes. The purposes of this systematic review were to examine the extent of the associations between the AQP1 rs1049305 genotype and CE exercise performance and body fluid loss in long-distance runners and AQP1 channel associations with other CE phenotypes. Methods Data sources: A comprehensive review was conducted using PubMed, EMBASE, CINAHL, and Cochrane electronic databases. The search ranged from January 1, 1988, to December 31, 2018. Studies reported in English, French, and Spanish were considered. Eligibility criteria: The criteria for inclusion in the review were (a) case-control study; (b) unequivocal definition of cases and controls; (c) CE was defined as performance in endurance events, laboratory tests, and/or maximal oxygen consumption; (d) exclusion criteria of known causes; (e) genotyping performed by PCR or sequencing; (f) genotype frequencies reported; and (g) no deviation of genotype frequencies from Hardy-Weinberg equilibrium in the control group. Study appraisal: The systematic review included studies examining the AQP1 gene and AQP1 channel structure and function, associations between the AQP1 gene sequence variant rs1049305 (C > G) and CE performance, body fluid loss in long-distance runners, and other studies reporting on the AQP1 gene and channel CE phenotype associations. Synthesis methods: For each selected study, the following data were extracted: authors, year of publication, sample size and number of cases and controls, CE definition, exclusion criteria, inclusion criteria for cases and controls, methods used for genotyping, genotype, allele frequencies and HWE for genotype frequencies in cases and control groups, and method of AQP1 gene and AQP1 channel analysis. Results The initial databases search found 172 pertinent studies. Of those, 46 studies were utilized in the final synthesis of the systematic review. The most relevant findings were (a) the identification of an independent replication of the association between AQP1 gene sequence variant rs1049305 (C > G) and CE performance; (b) the association of the rs1049305 C-allele with faster CE running performance; (c) in knockout model, using a linear regression analysis of distance run as a function of Aqp1 status (Aqp1-null vs. wild-type mice) and conditions of hypoxia (ambient [O2] = 16%), normoxia (21%), and hyperoxia (40%) indicated that the Aqp1 knockout ran less distance than the wild-type mice (p < 0.001); (d) in vitro, a reduced AQP1 expression was associated with the presence of the rs1049305 G-allele; (e) AQP1 null humans led normal lives and were entirely unaware of any physical limitations. However, they could not support fluid homeostasis when exposed to chronic fluid overload. The limited number of studies with “adequate sample sizes” in various racial and ethnic groups precluding to perform proper in-depth statistical analysis. Conclusions The AQP1 gene and AQP1 channel seems to support homeostatic mechanisms, yet to be totally understood, that are auxiliary in achieving an advantage during endurance exercise. AQP1 functions are vital during exercise and have a profound influence on endurance running performance. AQP1s are underappreciated structures that play vital roles in cellular homeostasis at rest and during CE endurance running exercise. The outcome of the present systematic review provide support to the statement of hypotheses and further research endeavors on the likely influence of AQP1 gene and AQP1 channel on CE performance. Registration: The protocol is not registered.
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Affiliation(s)
- Miguel A Rivera
- Department of Physical Medicine, Rehabilitation & Sports Medicine, School of Medicine, University of Puerto Rico, Main Building Office A204, San Juan, PR, 00936, USA.
| | - Thomas D Fahey
- Department of Kinesiology, California State University, Chico, 95929-0330, CA, USA
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189
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190
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Lohrasebi A, Koslowski T. Modeling water purification by an aquaporin-inspired graphene-based nano-channel. J Mol Model 2019; 25:280. [PMID: 31463758 DOI: 10.1007/s00894-019-4160-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 08/14/2019] [Indexed: 12/13/2022]
Abstract
Understanding the mechanism of water and particle transport through thin-film membranes is essential to improve the water permeability and the salt rejection rate of the purification progress. In this research, mimicking from the structure and operation of the aquaporin channel, graphene-based nano-channels were designed to be used as a water filter. The effects of variation of the channel's main elements, such as the width of the bottleneck and charges attached to the channel on its efficiency, were investigated via molecular dynamics simulations. We observe that the water flow through the channel decreases by increasing the charge, while the ion rejection rate of the channel is enhanced. Moreover, we find that the geometry and shape of the bottleneck part of the channel can affect the channel water flow and its selectivity. Finally, the pressure and the flow velocity in the channel were considered by using finite element models, and the results indicate that they are high at the entrance of the channel. The outcomes of this study can be used to improve the molecular knowledge of water desalination, which might be helpful in designing more efficient membranes. Graphical abstract As the piston pushed the solution to pass through the nano-channel, positive and negative ions are remained in the first box, by sensing electric field generated from the attached charges to the bottleneck part of the channel. Atomistic structure of channel is shown in the right part of the figure and the generated electric field is shown in the left part of the figure.
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Affiliation(s)
- A Lohrasebi
- Department of Physics, University of Isfahan, Isfahan, 8174673441, Iran. .,School of Nano-Science, Institute for Research in Fundamental Sciences (IPM), Tehran, 193955531, Iran.
| | - T Koslowski
- Institute for Physical Chemistry, University of Freiburg, Albertstrasse 23a, D-79104, Freiburg, Germany
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191
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Maurer M, Oostenbrink C. Water in protein hydration and ligand recognition. J Mol Recognit 2019; 32:e2810. [PMID: 31456282 PMCID: PMC6899928 DOI: 10.1002/jmr.2810] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 12/16/2022]
Abstract
This review describes selected basics of water in biomolecular recognition. We focus on a qualitative understanding of the most important physical aspects, how these change in magnitude between bulk water and protein environment, and how the roles that water plays for proteins arise from them. These roles include mechanical support, thermal coupling, dielectric screening, mass and charge transport, and the competition with a ligand for the occupation of a binding site. The presence or absence of water has ramifications that range from the thermodynamic binding signature of a single ligand up to cellular survival. The large inhomogeneity in water density, polarity and mobility around a solute is hard to assess in experiment. This is a source of many difficulties in the solvation of protein models and computational studies that attempt to elucidate or predict ligand recognition. The influence of water in a protein binding site on the experimental enthalpic and entropic signature of ligand binding is still a point of much debate. The strong water‐water interaction in enthalpic terms is counteracted by a water molecule's high mobility in entropic terms. The complete arrest of a water molecule's mobility sets a limit on the entropic contribution of a water displacement process, while the solvent environment sets limits on ligand reactivity.
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Affiliation(s)
- Manuela Maurer
- Institute of Molecular Modeling and Simulation, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Chris Oostenbrink
- Institute of Molecular Modeling and Simulation, University of Natural Resources and Life Sciences, Vienna, Austria
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192
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Mizuguchi T, Hagita K, Fujiwara S, Yamada T. Hydrogen bond analysis of confined water in mesoporous silica using the reactive force field. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1652740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tomoko Mizuguchi
- Faculty of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Katsumi Hagita
- Department of Applied Physics, National Defense Academy, Yokosuka, Japan
| | - Susumu Fujiwara
- Faculty of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Takeshi Yamada
- CROSS Neutron Science and Technology Center, Tokai Naka, Japan
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193
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Dingwell DA, Brown LS, Ladizhansky V. Structure of the Functionally Important Extracellular Loop C of Human Aquaporin 1 Obtained by Solid-State NMR under Nearly Physiological Conditions. J Phys Chem B 2019; 123:7700-7710. [DOI: 10.1021/acs.jpcb.9b06430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dylan Archer Dingwell
- Department of Physics and Biophysics Interdepartmental Group, University of Guelph, 50 Stone Road E, Guelph, Ontario N1G 2W1, Canada
| | - Leonid S. Brown
- Department of Physics and Biophysics Interdepartmental Group, University of Guelph, 50 Stone Road E, Guelph, Ontario N1G 2W1, Canada
| | - Vladimir Ladizhansky
- Department of Physics and Biophysics Interdepartmental Group, University of Guelph, 50 Stone Road E, Guelph, Ontario N1G 2W1, Canada
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194
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Fu D, Dai L, Gao H, Sun Y, Liu B, Chen H. Identification, Expression Patterns and RNA Interference of Aquaporins in Dendroctonus armandi (Coleoptera: Scolytinae) Larvae During Overwintering. Front Physiol 2019; 10:967. [PMID: 31427984 PMCID: PMC6688586 DOI: 10.3389/fphys.2019.00967] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 07/11/2019] [Indexed: 11/13/2022] Open
Abstract
The ability to survive annual temperature minima could be a key determinant of distribution limits for insects under global climate change. Recent studies have suggested that insect aquaporins are indispensable for cellular water management under conditions that lead to dehydration and cold stress. Aquaporins are integral membrane water channel proteins in the major intrinsic protein superfamily and promote selected solutes and the movement of water across biological membranes. We cloned and characterized nine full-length aquaporins from Dendroctonus armandi (DaAqps), the most destructive forest pest in the Qinling Mountains of Shaanxi Province, China. Eight of the DaAqps belong to three classical aquaporin grades, including the Drosophila integral protein, the Pyrocoelia rufa integral protein, the entomoglyceroporins and one that belongs to the unorthodox grade of aquaporin 12-like channels. The DaAqps were increasingly expressed during different developmental stages and in different larval tissues, and expression peaked in mid-winter. They were tested under cold conditions for different lengths of time, and the expression of almost all DaAqps was down regulated with decreasing temperatures and long-term exposure to cold conditions. However, when the lowest temperatures were reached, the levels were immediately upregulated. These genes indicate that cold tolerance can improve through mortality responses at low temperatures after RNA interference of DaAqps. In our study, we analyzed the molecular response, expression patterns, and RNA interference of DaAqps and clarified the crucial role of protective compounds (aquaporins) underlying D. armandi cold tolerance and provide a new pest control method.
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Affiliation(s)
- Danyang Fu
- College of Forestry, Northwest A&F University, Yangling, China
| | - Lulu Dai
- College of Forestry, Northwest A&F University, Yangling, China
| | - Haiming Gao
- College of Forestry, Northwest A&F University, Yangling, China
| | - Yaya Sun
- College of Forestry, Northwest A&F University, Yangling, China
| | - Bin Liu
- College of Forestry, Northwest A&F University, Yangling, China
| | - Hui Chen
- College of Forestry, Northwest A&F University, Yangling, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
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195
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Autzen HE, Julius D, Cheng Y. Membrane mimetic systems in CryoEM: keeping membrane proteins in their native environment. Curr Opin Struct Biol 2019; 58:259-268. [PMID: 31279500 DOI: 10.1016/j.sbi.2019.05.022] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 05/24/2019] [Accepted: 05/27/2019] [Indexed: 01/02/2023]
Abstract
Advances in electron microscopes, detectors and data processing algorithms have greatly facilitated the structural determination of many challenging integral membrane proteins that have been evasive to crystallization. These breakthroughs facilitate the application and development of various membrane protein solubilization approaches for structural studies, including reconstitution into lipid nanoparticles. In this review, we discuss various approaches for preparing transmembrane proteins for structural determination with single-particle electron cryo microscopy (cryoEM).
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Affiliation(s)
- Henriette E Autzen
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, USA; Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark
| | - David Julius
- Department of Physiology, University of California, San Francisco, CA 94143, USA.
| | - Yifan Cheng
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, USA; Howard Hughes Medical Institute, University of California, San Francisco, CA 94143, USA.
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196
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Wu K, Chen Z, Li J, Xu J, Wang K, Li R, Wang S, Dong X. Ultrahigh Water Flow Enhancement by Optimizing Nanopore Chemistry and Geometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8867-8873. [PMID: 31244258 DOI: 10.1021/acs.langmuir.9b01179] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The high permeability of nanoporous membranes is crucial for separation processes and energy conversions, especially for the world today that is facing growing water scarcity and energy demands. Unfortunately, further improving permeability, without sacrificing the required selectivity for specific applications, is still extremely challenging. Here, we shed light on the mechanisms of extremely high water permeability of artificial nanopores with the aquaporin-inspired pore geometry and propose a simple yet practical optimization strategy by using computational research to relate nanopore chemistry and geometry to permeability performance. We demonstrated that an ultrahigh water flow enhancement, up to 7 orders of magnitude, can be achieved by optimizing the combination of chemical and geometrical parameters of bioinspired artificial nanopores. Moreover, we addressed an existing debate over the water flow enhancement spanning over 10-1 to 105, attributed to the huge differences in chemical and geometrical properties. Our work provides a guideline to the design and optimization of nanofluidic devices with excellent performance.
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Affiliation(s)
- Keliu Wu
- State Key Laboratory of Petroleum Resources and Prospecting , China University of Petroleum (Beijing) , Beijing 102249 , China
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Zhangxin Chen
- State Key Laboratory of Petroleum Resources and Prospecting , China University of Petroleum (Beijing) , Beijing 102249 , China
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Jing Li
- State Key Laboratory of Petroleum Resources and Prospecting , China University of Petroleum (Beijing) , Beijing 102249 , China
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Jinze Xu
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Kun Wang
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Ran Li
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Shuhua Wang
- Department of Chemical and Petroleum Engineering , University of Calgary , Calgary , Alberta T2N 1N4 , Canada
| | - Xiaohu Dong
- State Key Laboratory of Petroleum Resources and Prospecting , China University of Petroleum (Beijing) , Beijing 102249 , China
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197
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Scalise M, Console L, Galluccio M, Pochini L, Tonazzi A, Giangregorio N, Indiveri C. Exploiting Cysteine Residues of SLC Membrane Transporters as Targets for Drugs. SLAS DISCOVERY 2019; 24:867-881. [PMID: 31251685 DOI: 10.1177/2472555219856601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The observation that cysteine is the top gainer amino acid during evolution attracted the attention of scientists dealing with protein chemistry. The thiol group of cysteine, indeed, is a potential site for several types of reactions with variable specificity and strength. This feature proved to be promising also in the field of membrane transporters that represent boundary proteins fundamental for cell homeostasis. These proteins are classified, according to the driving force for transport, in primary or secondary active transporters. Another frequently used classification is nowadays based on phylogenesis. Two major groups are identified that take into account both criteria: the ABC and the SLC transporters, the second being much more numerous. The cellular localization of the transporters makes them very attractive for drug design. Moreover, the presence of at least one cysteine residue in all the annotated SLC transporters, so far, highlights the possibility of using the thiol (SH) residue for covalent drug targeting. Even if a delay exists in this research field due to the scarce knowledge of structure/function relationships, the setup of novel experimental tools for studying SLC proteins of plasma and organelle membranes opens an important perspective in pharmacology.
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Affiliation(s)
- Mariafrancesca Scalise
- Department DiBEST (Biologia, Ecologia e Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Lara Console
- Department DiBEST (Biologia, Ecologia e Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Michele Galluccio
- Department DiBEST (Biologia, Ecologia e Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Lorena Pochini
- Department DiBEST (Biologia, Ecologia e Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
| | - Annamaria Tonazzi
- CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnology (IBIOM), Bari, Italy
| | - Nicola Giangregorio
- CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnology (IBIOM), Bari, Italy
| | - Cesare Indiveri
- Department DiBEST (Biologia, Ecologia e Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Arcavacata di Rende, Italy
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198
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Darnall SM, Li C, Dunbar M, Alsina M, Keten S, Helms BA, Xu T. Organic Nanotube with Subnanometer, pH-Responsive Lumen. J Am Chem Soc 2019; 141:10953-10957. [DOI: 10.1021/jacs.9b03732] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shawn M. Darnall
- Department of Materials Science & Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Changyi Li
- The Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Martha Dunbar
- Department of Civil & Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Marco Alsina
- Department of Civil & Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Sinan Keten
- Department of Civil & Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Brett A. Helms
- The Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Ting Xu
- Department of Materials Science & Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- The Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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199
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Lussier Y, Fürst O, Fortea E, Leclerc M, Priolo D, Moeller L, Bichet DG, Blunck R, D'Avanzo N. Disease-linked mutations alter the stoichiometries of HCN-KCNE2 complexes. Sci Rep 2019; 9:9113. [PMID: 31235733 PMCID: PMC6591248 DOI: 10.1038/s41598-019-45592-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 06/11/2019] [Indexed: 12/21/2022] Open
Abstract
The four hyperpolarization-activated cylic-nucleotide gated (HCN) channel isoforms and their auxiliary subunit KCNE2 are important in the regulation of peripheral and central neuronal firing and the heartbeat. Disruption of their normal function has been implicated in cardiac arrhythmias, peripheral pain, and epilepsy. However, molecular details of the HCN-KCNE2 complexes are unknown. Using single-molecule subunit counting, we determined that the number of KCNE2 subunits in complex with the pore-forming subunits of human HCN channels differs with each HCN isoform and is dynamic with respect to concentration. These interactions can be altered by KCNE2 gene-variants with functional implications. The results provide an additional consideration necessary to understand heart rhythm, pain, and epileptic disorders.
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Affiliation(s)
- Yoann Lussier
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada
| | - Oliver Fürst
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada
| | - Eva Fortea
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada
| | - Marc Leclerc
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada
| | - Dimitri Priolo
- Department of Physics, Université de Montréal, Montréal, Canada
| | - Lena Moeller
- Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, Canada
| | - Daniel G Bichet
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada
| | - Rikard Blunck
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada.,Department of Physics, Université de Montréal, Montréal, Canada
| | - Nazzareno D'Avanzo
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, Canada. .,Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, Canada.
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200
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Transport of Reactive Oxygen and Nitrogen Species across Aquaporin: A Molecular Level Picture. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2930504. [PMID: 31316715 PMCID: PMC6604302 DOI: 10.1155/2019/2930504] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 05/22/2019] [Indexed: 12/28/2022]
Abstract
Aquaporins (AQPs) are transmembrane proteins that conduct not only water molecules across the cell membrane but also other solutes, such as reactive oxygen and nitrogen species (RONS), produced (among others) by cold atmospheric plasma (CAP). These RONS may induce oxidative stress in the cell interior, which plays a role in cancer treatment. The underlying mechanisms of the transport of RONS across AQPs, however, still remain obscure. We apply molecular dynamics simulations to investigate the permeation of both hydrophilic (H2O2 and OH) and hydrophobic (NO2 and NO) RONS through AQP1. Our simulations show that these RONS can all penetrate across the pores of AQP1. The permeation free energy barrier of OH and NO is lower than that of H2O2 and NO2, indicating that these radicals may have easier access to the pore interior and interact with the amino acid residues of AQP1. We also study the effect of RONS-induced oxidation of both the phospholipids and AQP1 (i.e., sulfenylation of Cys191) on the transport of the above-mentioned RONS across AQP1. Both lipid and protein oxidation seem to slightly increase the free energy barrier for H2O2 and NO2 permeation, while for OH and NO, we do not observe a strong effect of oxidation. The simulation results help to gain insight in the underlying mechanisms of the noticeable rise of CAP-induced RONS in cancer cells, thereby improving our understanding on the role of AQPs in the selective anticancer capacity of CAP.
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