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Ullah A, Aldakheel FM, Anjum SI, Raza G, Khan SA, Tlak Gajger I. Pharmacological properties and therapeutic potential of honey bee venom. Saudi Pharm J 2023; 31:96-109. [PMID: 36685303 PMCID: PMC9845117 DOI: 10.1016/j.jsps.2022.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 11/09/2022] [Indexed: 11/17/2022] Open
Abstract
Honey bee venom (BV) is a valuable product, and has a wide range of biological effects, and its use is rapidly increasing in apitherapy. Therefore, the current study, we reviewed the existing knowledge about BV composition and its numerous pharmacological properties for future research and use. Honey bee venom or apitoxin is produced in the venom gland in the honey bee abdomen. Adult bees use it as a primary colony defense mechanism. It is composed of many biologically active substances including peptides, enzymes, amines, amino acids, phospholipids, minerals, carbohydrates as well as some volatile components. Melittin and phospholipase A2 are the most important components of BV, having anti-cancer, antimicrobial, anti-inflammatory, anti-arthritis, anti-nociceptive and other curative potentials. Therefore, in medicine, BV has been used for centuries against different diseases like arthritis, rheumatism, back pain, and various inflammatory infections. Nowadays, BV or its components separately, are used for the treatment of various diseases in different countries as a natural medicine with limited side effects. Consequently, scientists as well as several pharmaceutical companies are trying to get a new understanding about BV, its substances and its activity for more effective use of this natural remedy in modern medicine.
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Affiliation(s)
- Amjad Ullah
- Department of Zoology, Kohat University of Science and Technology, Kohat 26000, Khyber Pakhtunkhwa, Pakistan
| | - Fahad Mohammed Aldakheel
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia,Prince Sattam bin Abdulaziz Research Chair for Epidemiology and Public Health, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia
| | - Syed Ishtiaq Anjum
- Department of Zoology, Kohat University of Science and Technology, Kohat 26000, Khyber Pakhtunkhwa, Pakistan,Corresponding author.
| | - Ghulam Raza
- Department of Biological Sciences, University of Baltistan, Skardu, Pakistan
| | - Saeed Ahmad Khan
- Department of Pharmacy, Institute of Chemical and Pharmaceutical Sciences, Kohat University of Science and Technology, Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Ivana Tlak Gajger
- Department for Biology and Pathology of Fish and Bees, Faculty of Veterinary Medicine University of Zagreb, Zagreb, Croatia
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Mansour AM, Khaled RM, Khaled E, Ahmed SK, Ismael OS, Zeinhom A, Magdy H, Ibrahim SS, Abdelfatah M. Ruthenium(II) carbon monoxide releasing molecules: Structural perspective, antimicrobial and anti-inflammatory properties. Biochem Pharmacol 2022; 199:114991. [DOI: 10.1016/j.bcp.2022.114991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/05/2022] [Accepted: 03/07/2022] [Indexed: 01/12/2023]
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Markovic M, Abramov-Harpaz K, Regev C, Ben-Shabat S, Aponick A, Zimmermann EM, Miller Y, Dahan A. Prodrug-Based Targeting Approach for Inflammatory Bowel Diseases Therapy: Mechanistic Study of Phospholipid-Linker-Cyclosporine PLA 2-Mediated Activation. Int J Mol Sci 2022; 23:ijms23052673. [PMID: 35269813 PMCID: PMC8910962 DOI: 10.3390/ijms23052673] [Citation(s) in RCA: 3] [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: 12/29/2021] [Revised: 02/14/2022] [Accepted: 02/24/2022] [Indexed: 02/04/2023] Open
Abstract
Therapeutics with activity specifically at the inflamed sites throughout the gastrointestinal tract (GIT) would be a major advance in our therapeutic approach to inflammatory bowel disease (IBD). We aimed to develop the prodrug approach that can allow such site-specific drug delivery. Currently, using cyclosporine as a drug of choice in IBD is limited to the most severe cases due to substantial systemic toxicities and narrow therapeutic index of this drug. Previously, we synthesized a series of a phospholipid-linker-cyclosporine (PLC) prodrugs designed to exploit the overexpression of phospholipase A2 (PLA2) in the inflamed intestinal tissues, as the prodrug-activating enzyme. Nevertheless, the extent and rate of prodrug activation differed significantly. In this study we applied in-vitro and modern in-silico tools based on molecular dynamics (MD) simulation, to gain insight into the dynamics and mechanisms of the PLC prodrug activation. We aimed to elucidate the reason for the significant activation change between different linker lengths in our prodrug design. Our work reveals that the PLC conjugate with the 12-carbon linker length yields the optimal prodrug activation by PLA2 in comparison to shorter linker length (6-carbons). This optimized length efficiently allows cyclosporine to be released from the prodrug to the active pocket of PLA2. This newly developed mechanistic approach, presented in this study, can be applied for future prodrug optimization to accomplish optimal prodrug activation and drug targeting in various conditions that include overexpression of PLA2.
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Affiliation(s)
- Milica Markovic
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (M.M.); (S.B.-S.)
| | - Karina Abramov-Harpaz
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (K.A.-H.); (C.R.)
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Clil Regev
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (K.A.-H.); (C.R.)
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Shimon Ben-Shabat
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (M.M.); (S.B.-S.)
| | - Aaron Aponick
- Department of Chemistry, University of Florida, Gainesville, FL 32603, USA;
| | - Ellen M. Zimmermann
- Department of Medicine, Division of Gastroenterology, University of Florida, Gainesville, FL 32610, USA;
| | - Yifat Miller
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (K.A.-H.); (C.R.)
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Correspondence: (Y.M.); (A.D.)
| | - Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (M.M.); (S.B.-S.)
- Correspondence: (Y.M.); (A.D.)
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The anticoagulant effect of Apis mellifera phospholipase A 2 is inhibited by CORM-2 via a carbon monoxide-independent mechanism. J Thromb Thrombolysis 2020; 49:100-107. [PMID: 31679116 DOI: 10.1007/s11239-019-01980-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Bee venom phospholipase A2 (PLA2) has potential for significant morbidity. Ruthenium (Ru)-based carbon monoxide releasing molecules (CORM) inhibit snake venoms that are anticoagulant and contain PLA2. In addition to modulating heme-bearing proteins with carbon monoxide, these CORM generate reactive Ru species that form adducts with histamine residues resulting in changes in protein function. This study sought to identify anticoagulant properties of bee venom PLA2 via catalysis of plasma phospholipids required for thrombin generation. Another goal was to determine if Ru-based CORM inhibit bee venom PLA2 via carbon monoxide release or via potential binding of reactive Ru species to a key histidine residue in the catalytic site of the enzyme. Anticoagulant activity of bee venom PLA2 was assessed via thrombelastography with normal plasma. Bee venom PLA2 was then exposed to different CORM and a metheme forming agent and anticoagulant activity was reassessed. Using Ru, boron and manganese-based CORM and a metheme forming agent, it was demonstrated that it was unlikely that carbon monoxide interaction with a heme group attached to PLA2 was responsible for inhibition of anticoagulant activity by Ru-based CORM. Exposure of PLA2 to a Ru-based CORM in the presence of histidine-rich human albumin resulted in loss of inhibition of PLA2. Ru-based CORM likely inhibit bee venom PLA2 anticoagulant activity via formation of reactive Ru species that bind to histidine residues of the enzyme.
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Khan MI, Hariprasad G. Human Secretary Phospholipase A2 Mutations and Their Clinical Implications. J Inflamm Res 2020; 13:551-561. [PMID: 32982370 PMCID: PMC7502393 DOI: 10.2147/jir.s269557] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 08/13/2020] [Indexed: 01/05/2023] Open
Abstract
Phospholipases A2 (PLA2s) belong to a superfamily of enzymes responsible for hydrolysis of the sn-2 fatty acids of membrane phospholipids to release arachidonic acid. PLA2s are the rate limiting enzyme for the downstream synthesis of prostaglandins and leukotrienes that are the main mediators of inflammation. The extracellular forms of this enzyme are also called the secretary phospholipase A2 (sPLA2) and are distributed extensively in most of the tissues in the human body. Their integral role in inflammatory pathways has been the primary reason for the extensive research on this molecule. The catalytic mechanism of sPLA2 is initiated by a histidine/aspartic acid/calcium complex within the active site. Though they are known to have certain housekeeping functions, certain mutations of sPLA2 are known to be implicated in causation of certain pathologies leading to diseases such as atherosclerosis, cardiovascular diseases, benign fleck retina, neurodegeneration, and asthma. We present an overview of human sPLA2 and a comprehensive compilation of the mutations that result in various disease phenotypes. The study not only helps to have a holistic understanding of human sPLA2 mutations and their clinical implications, but is also a useful platform to initiate research pertaining to structure–function relationship of the mutations to develop effective therapies for management of these diseases.
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Affiliation(s)
- Mohd Imran Khan
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Gururao Hariprasad
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India
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Becchimanzi A, Avolio M, Bostan H, Colantuono C, Cozzolino F, Mancini D, Chiusano ML, Pucci P, Caccia S, Pennacchio F. Venomics of the ectoparasitoid wasp Bracon nigricans. BMC Genomics 2020; 21:34. [PMID: 31924169 PMCID: PMC6954513 DOI: 10.1186/s12864-019-6396-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 12/12/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Venom is one of the most important sources of regulation factors used by parasitic Hymenoptera to redirect host physiology in favour of the developing offspring. This has stimulated a number of studies, both at functional and "omics" level, which, however, are still quite limited for ectophagous parasitoids that permanently paralyze and suppress their victims (i.e., idiobiont parasitoids). RESULTS Here we present a combined transcriptomic and proteomic study of the venom of the generalist idiobiont wasp Bracon nigricans, an ectophagous larval parasitoid of different lepidopteran species, for which we recently described the host regulation strategy and the functional role of the venom in the induction of physiological changes in parasitized hosts. The experimental approach used led to the identification of the main components of B. nigricans venom involved in host regulation. Enzymes degrading lipids, proteins and carbohydrates are likely involved in the mobilization of storage nutrients from the fat body and may concurrently be responsible for the release of neurotoxic fatty acids inducing paralysis, and for the modulation of host immune responses. CONCLUSION The present work contributes to fill the gap of knowledge on venom composition in ectoparasitoid wasps, and, along with our previous physiological study on this species, provides the foundation on which to develop a functional model of host regulation, based both on physiological and molecular data. This paves the way towards a better understanding of parasitism evolution in the basal lineages of Hymenoptera and to the possible exploitation of venom as source of bioinsecticidal molecules.
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Affiliation(s)
- Andrea Becchimanzi
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
| | - Maddalena Avolio
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
| | - Hamed Bostan
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
- Present address: Plants for Human Health Institute, North Carolina State University, Kannapolis, NC USA
| | - Chiara Colantuono
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
- Present address: Infrastrutture di Ricerca per le Risorse Biologiche Marine, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Flora Cozzolino
- Department of Chemical Sciences and CEINGE Biotecnologie Avanzate, University of Napoli Federico II, Napoli, Italy
| | - Donato Mancini
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
| | - Maria Luisa Chiusano
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
| | - Pietro Pucci
- Department of Chemical Sciences and CEINGE Biotecnologie Avanzate, University of Napoli Federico II, Napoli, Italy
| | - Silvia Caccia
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
| | - Francesco Pennacchio
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA Italy
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Mariani ME, Fidelio GD. Secretory Phospholipases A 2 in Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:861. [PMID: 31354755 PMCID: PMC6635587 DOI: 10.3389/fpls.2019.00861] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 06/14/2019] [Indexed: 05/17/2023]
Abstract
Secreted phospholipases (sPLA2s) in plants are a growing group of enzymes that catalyze the hydrolysis of sn-2 glycerophospholipids to lysophospholipids and free fatty acids. Until today, around only 20 sPLA2s were reported from plants. This review discusses the newly acquired information on plant sPLA2s including molecular, biochemical, catalytic, and functional aspects. The comparative analysis also includes phylogenetic, evolutionary, and tridimensional structure. The observations with emphasis in Glycine max sPLA2 are compared with the available data reported for all plants sPLA2s and with those described for animals (mainly from pancreatic juice and venoms sources).
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Affiliation(s)
- María Elisa Mariani
- Departamento de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigaciones Biológicas y Tecnológicas, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Departamento de Fundamentación Biológica, Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Gerardo Daniel Fidelio
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Química Biológica de Córdoba, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Perez-Riverol A, Lasa AM, Dos Santos-Pinto JRA, Palma MS. Insect venom phospholipases A1 and A2: Roles in the envenoming process and allergy. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 105:10-24. [PMID: 30582958 DOI: 10.1016/j.ibmb.2018.12.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 12/10/2018] [Accepted: 12/18/2018] [Indexed: 06/09/2023]
Abstract
Insect venom phospholipases have been identified in nearly all clinically relevant social Hymenoptera, including bees, wasps and ants. Among other biological roles, during the envenoming process these enzymes cause the disruption of cellular membranes and induce hypersensitive reactions, including life threatening anaphylaxis. While phospholipase A2 (PLA2) is a predominant component of bee venoms, phospholipase A1 (PLA1) is highly abundant in wasps and ants. The pronounced prevalence of IgE-mediated reactivity to these allergens in sensitized patients emphasizes their important role as major elicitors of Hymenoptera venom allergy (HVA). PLA1 and -A2 represent valuable marker allergens for differentiation of genuine sensitizations to bee and/or wasp venoms from cross-reactivity. Moreover, in massive attacks, insect venom phospholipases often cause several pathologies that can lead to fatalities. This review summarizes the available data related to structure, model of enzymatic activity and pathophysiological roles during envenoming process of insect venom phospholipases A1 and -A2.
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Affiliation(s)
- Amilcar Perez-Riverol
- Center of the Study of Social Insects, Department of Biology, Institute of Biosciences of Rio Claro, São Paulo State University (UNESP), Rio Claro, SP, 13500, Brazil
| | - Alexis Musacchio Lasa
- Center for Genetic Engineering and Biotechnology, Biomedical Research Division, Department of System Biology, Ave. 31, e/158 and 190, P.O. Box 6162, Cubanacan, Playa, Havana, 10600, Cuba
| | - José Roberto Aparecido Dos Santos-Pinto
- Center of the Study of Social Insects, Department of Biology, Institute of Biosciences of Rio Claro, São Paulo State University (UNESP), Rio Claro, SP, 13500, Brazil
| | - Mario Sergio Palma
- Center of the Study of Social Insects, Department of Biology, Institute of Biosciences of Rio Claro, São Paulo State University (UNESP), Rio Claro, SP, 13500, Brazil.
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Kawakami H, Goto SG, Murata K, Matsuda H, Shigeri Y, Imura T, Inagaki H, Shinada T. Isolation of biologically active peptides from the venom of Japanese carpenter bee, Xylocopa appendiculata. J Venom Anim Toxins Incl Trop Dis 2017; 23:29. [PMID: 28546807 PMCID: PMC5442655 DOI: 10.1186/s40409-017-0119-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/09/2017] [Indexed: 12/29/2022] Open
Abstract
Background Mass spectrometry-guided venom peptide profiling is a powerful tool to explore novel substances from venomous animals in a highly sensitive manner. In this study, this peptide profiling approach is successfully applied to explore the venom peptides of a Japanese solitary carpenter bee, Xylocopa appendiculata (Hymenoptera: Apoidea: Apidae: Anthophila: Xylocopinae: Xylocopini). Although interesting biological effects of the crude venom of carpenter bees have been reported, the structure and biological function of the venom peptides have not been elucidated yet. Methods The venom peptide profiling of the crude venom of X. appendiculata was performed by matrix-assisted laser desorption/ionization-time of flight mass spectroscopy. The venom was purified by a reverse-phase HPLC. The purified peptides were subjected to the Edman degradation, MS/MS analysis, and/or molecular cloning methods for peptide sequencing. Biological and functional characterization was performed by circular dichroism analysis, liposome leakage assay, and antimicrobial, histamine releasing and hemolytic activity tests. Results Three novel peptides with m/z 16508, 1939.3, and 1900.3 were isolated from the venom of X. appendiculata. The peptide with m/z 16508 was characterized as a secretory phospholipase A2 (PLA2) homolog in which the characteristic cysteine residues as well as the active site residues found in bee PLA2s are highly conserved. Two novel peptides with m/z 1939.3 and m/z 1900.3 were named as Xac-1 and Xac-2, respectively. These peptides are found to be amphiphilic and displayed antimicrobial and hemolytic activities. The potency was almost the same as that of mastoparan isolated from the wasp venom. Conclusion We found three novel biologically active peptides in the venom of X. appendiculata and analyzed their molecular functions, and compared their sequential homology to discuss their molecular diversity. Highly sensitive mass analysis plays an important role in this study. Electronic supplementary material The online version of this article (doi:10.1186/s40409-017-0119-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hiroko Kawakami
- Graduate School of Material Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan
| | - Shin G Goto
- Graduate School of Science, Department of Biology & Geosciences, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan
| | - Kazuya Murata
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502 Japan
| | - Hideaki Matsuda
- Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502 Japan
| | - Yasushi Shigeri
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Osaka, Japan
| | - Tomohiro Imura
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan
| | - Hidetoshi Inagaki
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan
| | - Tetsuro Shinada
- Graduate School of Material Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan
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The Molecular Basis of Toxins' Interactions with Intracellular Signaling via Discrete Portals. Toxins (Basel) 2017; 9:toxins9030107. [PMID: 28300784 PMCID: PMC5371862 DOI: 10.3390/toxins9030107] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/02/2017] [Accepted: 03/04/2017] [Indexed: 12/20/2022] Open
Abstract
An understanding of the molecular mechanisms by which microbial, plant or animal-secreted toxins exert their action provides the most important element for assessment of human health risks and opens new insights into therapies addressing a plethora of pathologies, ranging from neurological disorders to cancer, using toxinomimetic agents. Recently, molecular and cellular biology dissecting tools have provided a wealth of information on the action of these diverse toxins, yet, an integrated framework to explain their selective toxicity is still lacking. In this review, specific examples of different toxins are emphasized to illustrate the fundamental mechanisms of toxicity at different biochemical, molecular and cellular- levels with particular consideration for the nervous system. The target of primary action has been highlighted and operationally classified into 13 sub-categories. Selected examples of toxins were assigned to each target category, denominated as portal, and the modulation of the different portal’s signaling was featured. The first portal encompasses the plasma membrane lipid domains, which give rise to pores when challenged for example with pardaxin, a fish toxin, or is subject to degradation when enzymes of lipid metabolism such as phospholipases A2 (PLA2) or phospholipase C (PLC) act upon it. Several major portals consist of ion channels, pumps, transporters and ligand gated ionotropic receptors which many toxins act on, disturbing the intracellular ion homeostasis. Another group of portals consists of G-protein-coupled and tyrosine kinase receptors that, upon interaction with discrete toxins, alter second messengers towards pathological levels. Lastly, subcellular organelles such as mitochondria, nucleus, protein- and RNA-synthesis machineries, cytoskeletal networks and exocytic vesicles are also portals targeted and deregulated by other diverse group of toxins. A fundamental concept can be drawn from these seemingly different toxins with respect to the site of action and the secondary messengers and signaling cascades they trigger in the host. While the interaction with the initial portal is largely determined by the chemical nature of the toxin, once inside the cell, several ubiquitous second messengers and protein kinases/ phosphatases pathways are impaired, to attain toxicity. Therefore, toxins represent one of the most promising natural molecules for developing novel therapeutics that selectively target the major cellular portals involved in human physiology and diseases.
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Molecular modeling of Gly80 and Ser80 variants of human group IID phospholipase A2 and their receptor complexes: potential basis for weight loss in chronic obstructive pulmonary disease. J Mol Model 2016; 22:232. [PMID: 27585677 DOI: 10.1007/s00894-016-3095-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 08/08/2016] [Indexed: 10/21/2022]
Abstract
Weight loss is a well known systemic manifestation of chronic obstructive pulmonary disease (COPD). A Gly80Ser mutation on human group IID secretory phospholipase A2 (sPLA2) enhances expression of the cytokines that are responsible for weight loss. In this study, we seek to establish a structural correlation of wild type sPLA2 and the Gly80Ser mutation with function. sPLA2 with glycine and serine at the 80th positions and the M-type receptor were modelled. The enzymes were docked to the receptor and molecular dynamics was carried out to 70 ns. Structural analysis revealed the enzymes to comprise three helices (H1-H3), two short helices (SH1 and SH2), and five loops including a calcium binding loop (L1-L5), and to be stabilized by seven disulfide bonds. The overall backbone folds of the two models are very similar, with main chain RMSD of less than 1 Å. The active site within the substrate binding channel shows a catalytic triad of water-His67-Asp112, showing a hydrogen bonded network. Major structural differences between wild type and mutant enzymes were observed locally at the site of the mutation and in their global conformations. These differences include: (1) loop-L3 between H2 and H3, which bears residue Gly80 in the wild type, is in a closed conformation with respect to the channel opening, while in the mutant enzyme it adopts a relatively open conformation; (2) the mutant enzyme is less compact and has higher solvent accessible surface area; and (3) interfacial binding contact surface area is greater, and the quality of interactions with the receptor is better in the mutant enzyme as compared to the wild type. Therefore, the structural differences delineated in this study are potential biophysical factors that could determine the increased potency of the mutant enzyme with macrophage receptor for cytokine secreting function, resulting in exacerbation of cachexia in COPD.
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Babon A, Wurceldorf T, Almunia C, Pichard S, Chenal A, Buhot C, Beaumelle B, Gillet D. Bee venom phospholipase A2 as a membrane-binding vector for cell surface display or internalization of soluble proteins. Toxicon 2016; 116:56-62. [PMID: 26253725 DOI: 10.1016/j.toxicon.2015.07.338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 11/30/2022]
Abstract
We showed that bee venom phospholipase A2 can be used as a membrane-binding vector to anchor to the surface of cells a soluble protein fused to its C-terminus. ZZ, a two-domain derivative of staphylococcal protein A capable of binding constant regions of antibodies was fused to the C-terminus of the phospholipase or to a mutant devoid of enzymatic activity. The fusion proteins bound to the surface of cells and could themselves bind IgGs. Their fate depended on the cell type to which they bound. On the A431 carcinoma cell line the proteins remained exposed on the cell surface. In contrast, on human dendritic cells the proteins were internalized into early endosomes.
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Affiliation(s)
- Aurélie Babon
- CEA, iBiTecS, SIMOPRO, LabEx LERMIT, Gif sur Yvette F-91191, France
| | | | | | - Sylvain Pichard
- CEA, iBiTecS, SIMOPRO, LabEx LERMIT, Gif sur Yvette F-91191, France
| | - Alexandre Chenal
- CEA, iBiTecS, SIMOPRO, LabEx LERMIT, Gif sur Yvette F-91191, France
| | - Cécile Buhot
- CEA, iBiTecS, SIMOPRO, LabEx LERMIT, Gif sur Yvette F-91191, France
| | - Bruno Beaumelle
- FRE 3689 CNRS-UM, 1919 Route de Mende, 34293 Montpellier Cedex 05, France
| | - Daniel Gillet
- CEA, iBiTecS, SIMOPRO, LabEx LERMIT, Gif sur Yvette F-91191, France.
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Shin D, Lee G, Sohn SH, Park S, Jung KH, Lee JM, Yang J, Cho J, Bae H. Regulatory T Cells Contribute to the Inhibition of Radiation-Induced Acute Lung Inflammation via Bee Venom Phospholipase A₂ in Mice. Toxins (Basel) 2016; 8:toxins8050131. [PMID: 27144583 PMCID: PMC4885046 DOI: 10.3390/toxins8050131] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 04/23/2016] [Accepted: 04/26/2016] [Indexed: 01/30/2023] Open
Abstract
Bee venom has long been used to treat various inflammatory diseases, such as rheumatoid arthritis and multiple sclerosis. Previously, we reported that bee venom phospholipase A₂ (bvPLA₂) has an anti-inflammatory effect through the induction of regulatory T cells. Radiotherapy is a common anti-cancer method, but often causes adverse effects, such as inflammation. This study was conducted to evaluate the protective effects of bvPLA₂ in radiation-induced acute lung inflammation. Mice were focally irradiated with 75 Gy of X-rays in the lung and administered bvPLA₂ six times after radiation. To evaluate the level of inflammation, the number of immune cells, mRNA level of inflammatory cytokine, and histological changes in the lung were measured. BvPLA₂ treatment reduced the accumulation of immune cells, such as macrophages, neutrophils, lymphocytes, and eosinophils. In addition, bvPLA₂ treatment decreased inflammasome-, chemokine-, cytokine- and fibrosis-related genes' mRNA expression. The histological results also demonstrated the attenuating effect of bvPLA₂ on radiation-induced lung inflammation. Furthermore, regulatory T cell depletion abolished the therapeutic effects of bvPLA₂ in radiation-induced pneumonitis, implicating the anti-inflammatory effects of bvPLA₂ are dependent upon regulatory T cells. These results support the therapeutic potential of bvPLA₂ in radiation pneumonitis and fibrosis treatments.
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Affiliation(s)
- Dasom Shin
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
| | - Gihyun Lee
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
| | - Sung-Hwa Sohn
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul 120-752, South Korea.
| | - Soojin Park
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
| | - Kyung-Hwa Jung
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
| | - Ji Min Lee
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul 120-752, South Korea.
| | - Jieun Yang
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
| | - Jaeho Cho
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul 120-752, South Korea.
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 130-701, South Korea.
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Lee G, Bae H. Bee Venom Phospholipase A2: Yesterday's Enemy Becomes Today's Friend. Toxins (Basel) 2016; 8:48. [PMID: 26907347 PMCID: PMC4773801 DOI: 10.3390/toxins8020048] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/26/2016] [Accepted: 02/14/2016] [Indexed: 01/09/2023] Open
Abstract
Bee venom therapy has been used to treat immune-related diseases such as arthritis for a long time. Recently, it has revealed that group III secretory phospholipase A2 from bee venom (bee venom group III sPLA2) has in vitro and in vivo immunomodulatory effects. A growing number of reports have demonstrated the therapeutic effects of bee venom group III sPLA2. Notably, new experimental data have shown protective immune responses of bee venom group III sPLA2 against a wide range of diseases including asthma, Parkinson’s disease, and drug-induced organ inflammation. It is critical to evaluate the beneficial and adverse effects of bee venom group III sPLA2 because this enzyme is known to be the major allergen of bee venom that can cause anaphylactic shock. For many decades, efforts have been made to avoid its adverse effects. At high concentrations, exposure to bee venom group III sPLA2 can result in damage to cellular membranes and necrotic cell death. In this review, we summarized the current knowledge about the therapeutic effects of bee venom group III sPLA2 on several immunological diseases and described the detailed mechanisms of bee venom group III sPLA2 in regulating various immune responses and physiopathological changes.
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Affiliation(s)
- Gihyun Lee
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 1 Hoeki-Dong, Dongdaemoon-gu, Seoul 130-701, Korea.
| | - Hyunsu Bae
- Department of Physiology, College of Korean Medicine, Kyung Hee University, 1 Hoeki-Dong, Dongdaemoon-gu, Seoul 130-701, Korea.
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15
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Structural and phylogenetic basis for the classification of group III phospholipase A2. J Mol Model 2013; 19:3779-91. [DOI: 10.1007/s00894-013-1913-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 06/06/2013] [Indexed: 10/26/2022]
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16
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Almunia C, Bretaudeau M, Held G, Babon A, Marchetti C, Castelli FA, Ménez A, Maillere B, Gillet D. Bee Venom Phospholipase A2, a Good "Chauffeur" for Delivering Tumor Antigen to the MHC I and MHC II Peptide-Loading Compartments of the Dendritic Cells: The Case of NY-ESO-1. PLoS One 2013; 8:e67645. [PMID: 23825678 PMCID: PMC3688974 DOI: 10.1371/journal.pone.0067645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 05/20/2013] [Indexed: 12/23/2022] Open
Abstract
Bee venom phospholipase A2 (bvPLA2) is a small, 15kDa enzyme which hydrolyses many phospholipids through interfacial binding. The mutated bvPLA2H34Q (bvPLA2m), in which histidine-34 is replaced by glutamine, is not catalytically active. This protein has been shown to be a suitable membrane anchor and has been suggested as a suitable tumor-antigen vector for the development of novel dendritic cell-based vaccines. To confirm this feature, in this study the fusion protein PNY, composed of NY-ESO-1(NY(s)) fused to the C-terminus of bvPLA2m, was engineered. bvPLA2m enhanced the binding of NY(s) to the membrane of human monocyte-derived dendritic cells (DCs) and, once taken up by the cells, the antigen fused to the vector was directed to both MHC I and MHC II peptide-loading compartments. bvPLA2m was shown to increase the cross-presentation of the NY(s)-derived, restricted HLA-A*02 peptide, NY-ESO-1157-165(NY157-165), at the T1 cell surface. DCs loaded with the fusion protein induced cross-priming of NY(s)-specific CD8 + T-cells with greater efficiency than DCs loaded with NY(s). Sixty-five percent of these NY(s)-specific CD8+ T-cell lines could also be activated with the DCs pulsed with the peptide, NY157-165. Of these CD8+ T-cell lines, two were able to recognize the human melanoma cell line, SK-MEL-37, in a context of HLA-A*02. Only a small number of bvPLA2m CD8+ T-cell lines were induced, indicating the low immunogenicity of the protein. It was concluded that bvPLA2m can be used as a membrane-binding vector to promote MHC class II peptide presentation and MHC class I peptide cross-presentation. Such a system can, therefore, be tested for the preparation of cell-based vaccines.
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Affiliation(s)
- Christine Almunia
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
- Service de Biochimie et de Toxicologie nucléaire, Institut de Biologie Environnementale et Biotechnologie, Commissariat à l'énergie atomique et aux énergies alternatives, Bagnols sur Cèze, France
| | - Marie Bretaudeau
- Service de Biochimie et de Toxicologie nucléaire, Institut de Biologie Environnementale et Biotechnologie, Commissariat à l'énergie atomique et aux énergies alternatives, Bagnols sur Cèze, France
| | - Gerhard Held
- Medizinische Klinik I, Universitaetsklinik des Saarlandes, Homburg, Germany
| | - Aurélie Babon
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
| | - Charles Marchetti
- Service de Biochimie et de Toxicologie nucléaire, Institut de Biologie Environnementale et Biotechnologie, Commissariat à l'énergie atomique et aux énergies alternatives, Bagnols sur Cèze, France
| | - Florence Anne Castelli
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
| | - André Ménez
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
- Museum National d'Histoire Naturelle, Paris, France
| | - Bernard Maillere
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
| | - Daniel Gillet
- Service d’Ingénierie Moléculaire des Protéines, Institut de Biologie et Technologies de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives, Gif Sur Yvette, France
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17
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Mariani ME, Villarreal MA, Cheung F, Leiva EPM, Madoery RR, Fidelio GD. In silico and in vitro characterization of phospholipase A₂ isoforms from soybean (Glycine max). Biochimie 2012; 94:2608-19. [PMID: 23281487 DOI: 10.1016/j.biochi.2012.07.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
At the present, no secreted phospholipase A₂ (sPLA₂) from soybean (Glycine max) was investigated in detail. In this work we identified five sequences of putative secreted sPLA₂ from soybean after a BLAST search in G. max database. Sequence analysis showed a conserved PA2c domain bearing the Ca²⁺ binding loop and the active site motif. All the five mature proteins contain 12 cysteine residues, which are commonly conserved in plant sPLA₂s. We propose a phylogenetic tree based on sequence alignment of reported plant sPLA₂s including the novel enzymes from G. max. According to PLA₂ superfamily, two of G. max sPLA₂s are grouped as XIA and the rest of sequences as XIB, on the basis of differences found in their molecular weights and deviating sequences especially in the N- and C-terminal regions of the isoenzymes. Furthermore, we report the cloning, expression and purification of one of the putative isoenzyme denoted as GmsPLA₂-XIA-1. We demonstrate that this mature sPLA₂ of 114 residues had PLA₂ activity on Triton:phospholipid mixed micelles and determine the kinetic parameters for this system. We generate a model based on the known crystal structure of sPLA₂ from rice (isoform II), giving first insights into the three-dimensional structure of folded GmsPLA₂-XIA-1. Besides describing the spatial arrangement of highly conserved pair HIS-49/ASP-50 and the Ca⁺² loop domains, we propose the putative amino acids involved in the interfacial recognition surface. Additionally, molecular dynamics simulations indicate that calcium ion, besides its key function in the catalytic cycle, plays an important role in the overall stability of GmsPLA₂-XIA-1 structure.
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Affiliation(s)
- María Elisa Mariani
- Centro de Investigaciones en Química Biológica de Córdoba, (CIQUIBIC, UNCeCONICET), Departamento de Química Biológica, Fac. de Cs. Químicas, Universidad Nacional de Córdoba, Haya de Torre y Medina Allende, Ciudad Universitaria, X5000HUA Córdoba, Argentina
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18
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Hariprasad G, Kaur P, Srinivasan A, Singh TP, Kumar M. Structural analysis of secretory phospholipase A2 from Clonorchis sinensis: therapeutic implications for hepatic fibrosis. J Mol Model 2012; 18:3139-45. [PMID: 22215060 DOI: 10.1007/s00894-011-1333-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 12/12/2011] [Indexed: 11/25/2022]
Abstract
Hepatic fibrosis is a common complication of the infection by the parasite, Clonorchis sinensis. There is a high incidence of this disease in the Asian countries with an increased risk of conversion to cancer. A secretory phospholipase A(2) (PLA(2)) enzyme from the parasite is implicated in the pathology. This is an attractive drug target in the light of extensive structural characterization of this class of enzyme. In this study, the structure of the enzyme was modeled based on its sequence homology to the group III bee venom PLA(2). On analysis, the overall structure essentially is comprised of three helices, two sets of β-wings and an elongated C-terminal extension. The structure is stabilized by four disulfide bonds. The structure is comprised of a calcium binding loop, active site and a substrate binding hydrophobic channel. The active site of the enzyme shows the classical features of PLA(2) with the participation of the three residues: histidine-aspartic acid-tyrosine in hydrogen bond formation. This is an interesting variation from the house keeping group III PLA(2) enzyme of human which has a histidine-aspartic acid and phenylalanine arrangement at the active site. This difference is therefore an important structural parameter that can be exploited to design specific inhibitor molecules against the pathogen PLA(2). Likewise, there are certain unique structural features in the hydrophobic channel and the putative membrane binding surface of the PLA(2) from Clonorchis sinensis that not only help understand the mechanism of action but also provide knowledge for a targeted therapy of liver fibrosis caused by the parasite.
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Affiliation(s)
- Gururao Hariprasad
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India.
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19
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Structural analysis of a group III Glu62-phospholipase A2 from the scorpion, Mesobuthus tamulus: Targeting and reversible inhibition by native peptides. Int J Biol Macromol 2011; 48:423-31. [PMID: 21238479 DOI: 10.1016/j.ijbiomac.2011.01.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 12/22/2010] [Accepted: 01/04/2011] [Indexed: 11/22/2022]
Abstract
Group III phospholipase A(2) enzyme transcript from the Mesobuthus tamulus (Indian red scorpion) codes for three distinct products that include a large enzymatic subunit, a pentameric peptide and a small non-enzymatic subunit. The structures of these two subunits were modeled based on their sequence identity to bee venom PLA(2) and the partial sequence of MU2 adaptin subunit of AP2 clathrin adaptor, respectively. The enzymatic subunit comprises of three helices, the calcium binding loop and a substrate binding hydrophobic channel where the structure is stabilized by four disulfide bonds. The active site of the enzyme shows a catalytic histidine residue. Interestingly, there is a conservative mutation of the conserved aspartic acid, a classical participant of catalysis in this enzyme family, to glutamic acid. However, the side chain oxygen atoms of this glutamate are oriented away from the catalytic histidine implicating the non-participation of this residue in stabilizing the tautomeric conformation of the histidine. The acidic non-enzymatic subunit comprises of extensive hydrophobic residues with a conformation of an anti-parallel β-sheets making it ideal for tissue specific targeting. The native pentapeptide with the sequence Alanine-Arginine-Serine-Alanine-Arginine was docked to the enzymatic subunit. The peptide ligand occupies the hydrophobic cavity and makes a plethora of interactions with the residues in the channel, including a hydrogen bond with the crucial catalytic histidine and coordinate bond with the calcium ion. This ligand has a binding constant (K(D)) of 1.5μM. This makes the ligand a potential reversible inhibitor, ideal to prevent the enzyme from interacting with non-specific molecules enroute to the target. The enzyme-ligand complex also provides a model to understand the stereochemistry required for the design of more potent drug molecules against such enzyme drug targets.
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20
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Florea A, Crăciun C. Abnormal mitochondrial cristae were experimentally generated by high doses of Apis mellifera venom in the rat adrenal cortex. Micron 2010; 42:434-42. [PMID: 21247771 DOI: 10.1016/j.micron.2010.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Revised: 12/17/2010] [Accepted: 12/21/2010] [Indexed: 11/29/2022]
Abstract
In the present study, Apis mellifera venom (AmV) was tested for its ability to cause ultrastructural changes in mitochondria of rat adrenal cortex in vivo. In order to achieve this goal, different AmV treatments were performed and the effects were quantified on transmission electron micrographs. In a first experimental group, AmV injected for 30 days in low daily doses (700 μg/kg) generated important ultrastructural changes in zona fasciculata. The mitochondrial ultrastructure was not affected, but the diameters of mitochondrial cristae (MC) were reduced (57.066 ± 7.795 nm) as compared to the MC diameters in the corresponding control groups (58.596 ± 6.603 nm, and 58.503 ± 5.708 nm). In adrenal glands collected from rats injected with a single, high dose of AmV (62 mg/kg), many ultrastructural changes were described. Mitochondria with normal, tubular MC (with diameter of 58.711 ± 5.907 nm) were observed in many cells, very close to the values calculated for the corresponding control group (58.639 ± 6.117 nm). However, the striking data reported herein concerned the ability of AmV high doses to promote dramatic alterations in the ultrastructure of these particular mitochondria, similar to those described in certain severe diseases. Thus, several types of abnormal mitochondria were observed, including mitochondria displaying lamellar and/or circular, concentric cristae and mitochondria devoid of cristae. The abnormal circular, concentric MC, with large inner (281.904 ± 158.588 nm) and outer (432.076 ± 230.372 nm) diameters, appeared to be the most stable form of MC in the adrenal cortex after the acute treatment with AmV. Among other ultrastructural aspects, these important changes indicated a high level of cytotoxicity of AmV in adrenocortical cells following in vivo experimental poisoning.
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Affiliation(s)
- Adrian Florea
- Laboratory of Electron Microscopy, Department of Cell and Molecular Biology, Iuliu Haţieganu University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania.
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21
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Shen LR, Ding MH, Zhang LW, Zhang WG, Liu L, Li D. Expression of a bee venom phospholipase A2 from Apis cerana cerana in the baculovirus-insect cell. J Zhejiang Univ Sci B 2010; 11:342-9. [PMID: 20443212 DOI: 10.1631/jzus.b0900254] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bee venom phospholipase A(2) (BvPLA(2)) is a lipolytic enzyme that catalyzes the hydrolysis of the sn-2 acyl bond of glycerophospholipids to liberate free fatty acids and lysophospholipids. In this work, a new BvPLA(2) (AccPLA(2)) gene from the Chinese honeybee (Apis cerana cerana) venom glands was inserted into bacmid to construct a recombinant transfer vector. Tn-5B-4 (Tn) cells were transfected with the recombinant bacmid DNA for expression. Sodium dodecylsulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis revealed a double band with molecular weights of 16 and 18 kDa. Products of hexahistidine AccPLA(2) fusion protein accumulated up to 5.32% of the total cellular proteins. The AccPLA(2) fusion protein was cross reactive with the anti-AmPLA(2) (BvPLA(2) of the European honeybee, Apis mellifera) polyclonal serum. The reaction resulted in a double glycosylation band, which agrees with the band generated by the native AmPLA(2) in Western blot analysis. The PLA(2) activity of the total extracted cellular protein in the hydrolyzing egg yolk is about 3.16 micromol/(min.mg). In summary, the recombinant AccPLA(2) protein, a native BvPLA(2)-like structure with corresponding biological activities, can be glycosylated in Tn cells. These findings provided fundamental knowledge for potential genetic engineering to produce AccPLA(2) in the pharmaceutical industry.
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Affiliation(s)
- Li-Rong Shen
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310029, China.
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22
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Leopoldini M, Russo N, Toscano M. Favored Reaction Mechanism of Calcium-Dependent Phospholipase A2. Insights from Density Functional Exploration. J Phys Chem B 2010; 114:11584-93. [DOI: 10.1021/jp1003819] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Monica Leopoldini
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Nino Russo
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Marirosa Toscano
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
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23
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Xin Y, Choo YM, Hu Z, Lee KS, Yoon HJ, Cui Z, Sohn HD, Jin BR. Molecular cloning and characterization of a venom phospholipase A2 from the bumblebee Bombus ignitus. Comp Biochem Physiol B Biochem Mol Biol 2009; 154:195-202. [DOI: 10.1016/j.cbpb.2009.06.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 06/08/2009] [Accepted: 06/08/2009] [Indexed: 10/20/2022]
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Silva TC, De Paula Moura S, Ramos HR, De Araujo PS, Bueno Da Costa MH. Design of a Modern Liposome and Bee Venom Formulation for the Traditional VIT-Venom Immunotherapy. J Liposome Res 2008; 18:353-68. [DOI: 10.1080/08982100802518046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tatiana C. Silva
- Laboratório de Microesferas e Lipossomas
- Departamento de Medicina, Disciplina de Clínica Médica-UNIFESP, São Paulo, Brasil
| | | | - Henrique R. Ramos
- Laboratório de Biotecnologia Molecular, (Centro de Biotecnologia), Instituto Butantan, São Paulo, Brasil
- Departamento de Bioquímica-Instituto de Química-USP, São Paulo, Brasil
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25
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Hariprasad G, Singh B, Das U, Ethayathulla AS, Kaur P, Singh TP, Srinivasan A. Cloning, sequence analysis and homology modeling of a novel phospholipase A2 from Heterometrus fulvipes (Indian black scorpion). ACTA ACUST UNITED AC 2007; 18:242-6. [PMID: 17454010 DOI: 10.1080/10425170701243294] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
We report the cloning and sequencing of group III phospholipaseA(2) from Heterometrus fulvipes (HfPLA(2)), Indian black scorpion. The cDNA sequence codes for the mature portion of the group PLA(2) of 103 amino acids. The sequence has 85% identity with Mesobuthus tamulus (Indian red scorpion) PLA(2) and a 40% identity with bee venom PLA(2) and human group III PLA(2). Most of the essential features of group III PLA(2) like Ca(2+) binding loop and catalytic residues are conserved. Homology modeling was done with the known structure of group III bee venom PLA(2). All the secondary structural motifs and the disulfide bridges are as predicted. The variation like the replacement of aspartic acid residue with glutamic acid in the well known histidine-aspartic acid dyad is a rare feature. This is the first structural model report of an Indian black scorpion PLA(2).
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Affiliation(s)
- Gururao Hariprasad
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029, India.
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26
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Li JH, Zhang CX, Shen LR, Tang ZH, Cheng JA. Expression and regulation of phospholipase A2 in venom gland of the chinese honeybee, Apis cerana cerana. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2005; 60:1-12. [PMID: 16116618 DOI: 10.1002/arch.20075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Phospholipase A(2) (PLA(2)) is one of the components of bee venom with a wide range of pharmacological functions. It operates as a major allergen working with other venom components to defend the colony from intruder. In the present study, the cDNA sequence of the Ac-pla(2) gene from cDNA library of the venom gland of Apis cerana was compared with the amplified corresponding region of genomic DNA. The result showed that the Ac-pla(2) gene consisted of four exons and three introns. Southern blot showed that the Ac-pla(2) gene was a single copy per haploid genome. The most active transcription period was during the first 8 days of adults, which correspondingly was the period of sharp increase of PLA(2) protein. ELISA analysis revealed that the PLA(2) was undetectable in pupal stage and the newly eclosed adult, but increased sharply to a maximum of 10-12 mug per honeybee by 8-10 days of adult life, followed by a gradual decrease to 8 mug for the rest of adult life. Transcriptional or post transcriptional regulation is the key step for Ac-pla(2) expression. The early secreted Ac-PLA(2) showed a low degree of post-translational modification; with increasing age, glycosylation was detected by Western blot and glycoprotein staining analysis. Different post-translational modifications were found among different individuals in A. cerana when compared to A. mellifera.
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Affiliation(s)
- Jiang-Hong Li
- Institute of Applied Entomology, Zhejiang University, Hangzhou, China
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27
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Sher D, Knebel A, Bsor T, Nesher N, Tal T, Morgenstern D, Cohen E, Fishman Y, Zlotkin E. Toxic polypeptides of the hydra—a bioinformatic approach to cnidarian allomones. Toxicon 2005; 45:865-79. [PMID: 15904682 DOI: 10.1016/j.toxicon.2005.02.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2005] [Revised: 02/14/2005] [Accepted: 02/15/2005] [Indexed: 02/02/2023]
Abstract
Cnidarians such as hydrae and sea anemones are sessile, predatory, soft bodied animals which depend on offensive and defensive allomones for prey capture and survival. These allomones are distributed throughout the entire organism both in specialized stinging cells (nematocytes) and in the body tissues. The cnidarian allomonal system is composed of neurotoxins, cytolysins and toxic phospholipapses. The present bioinformatic survey was motivated by the fact that while hydrae are the most studied model cnidarian, little is known about their allomones. A large-scale EST database from Hydra magnipapillata was searched for orthologs of known cnidarian allomones, as well as for allomones found in other venomous organisms. We show that the hydrae express orthologs of cnidarian phospholipase A2 toxins and cytolysins belonging to the actinoporin family, but could not find orthologs of the 'classic' short chain neurotoxins affecting sodium and potassium conductance. Hydrae also express proteins similar to elapid-like phospholipases, CRISP proteins, Prokineticin-like polypeptides and toxic deoxyribonucleases. Our results illustrate a high level of complexity in the hydra allomonal system, suggest that several toxins represent a basal component of all cnidarian allomones, and raise the intriguing possibility that similar proteins may fulfill both endogenous and allomonal roles in cnidaria.
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Affiliation(s)
- Daniel Sher
- Department of Cell and Animal Biology, Silberman Institute of Life Sciences, Hebrew University, Jerusalem, Israel.
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28
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Babon A, Almunia C, Boccaccio C, Beaumelle B, Gelb MH, Ménez A, Maillère B, Abastado JP, Salcedo M, Gillet D. Cross-presentation of a CMV pp65 epitope by human dendritic cells using bee venom PLA2 as a membrane-binding vector. FEBS Lett 2005; 579:1658-64. [PMID: 15757657 DOI: 10.1016/j.febslet.2005.02.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Revised: 01/27/2005] [Accepted: 02/04/2005] [Indexed: 10/25/2022]
Abstract
We have used bee venom phospholipase A2 as a vector to load human dendritic cells ex vivo with a major histocompatibility complex (MHC) class I-restricted epitope fused to its C-terminus. The fusion protein bound to human monocyte-derived dendritic cells and was internalized into early endosomes. In vitro immunization experiments showed that these dendritic cells were able to generate specific CD8 T cell lines against the epitope carried by the fusion protein. Cross-presentation did not require proteasome, transporter associated with antigen processing, or endosome proteases, but required newly synthesized MHC molecules. Comparison of the antigen presentation pathway observed in this study to that followed by other toxins used as vectors is discussed.
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Affiliation(s)
- Aurélie Babon
- Protein Engineering and Research Department (DIEP), bat 152, CEA-Saclay, 91191 Gif sur Yvette cedex, France
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29
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Poi MJ, Tomaszewski JW, Yuan C, Dunlap CA, Andersen NH, Gelb MH, Tsai MD. A low-barrier hydrogen bond between histidine of secreted phospholipase A2 and a transition state analog inhibitor. J Mol Biol 2003; 329:997-1009. [PMID: 12798689 DOI: 10.1016/s0022-2836(03)00512-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work describes in-depth NMR characterization of a unique low-barrier hydrogen bond (LBHB) between an active site residue from the enzyme and a bound inhibitor: the complex between secreted phospholipase A(2) (sPLA(2), from bee venom and bovine pancreas) and a transition-state analog inhibitor HK32. A downfield proton NMR resonance, at 17-18 ppm, was observed in the complex but not in the free enzyme. On the basis of site-specific mutagenesis and specific 15N-decoupling, this downfield resonance was assigned to the active site H48, which is part of the catalytic dyad D99-H48. These results led to a hypothesis that the downfield resonance represents the proton (H(epsilon 2) of H48) involved in the H-bonding between D99 and H48, in analogy with serine proteases. However, this was shown not to be the case by use of the bovine enzyme labeled with specific [15N(epsilon 2)]His. Instead, the downfield resonance arises from H(delta1) of H48, which forms a hydrogen bond with a non-bridging phosphonate oxygen of the inhibitor. Further studies showed that this proton displays a fractionation factor of 0.62(+/-0.06), and an exchange rate protection factor of >100 at 285 K and >40 at 298 K, which are characteristic of a LBHB. The pK(a) of the imidazole ring of H48 was shown to be shifted from 5.7 for the free enzyme to an apparent value of 9.0 in the presence of the inhibitor. These properties are very similar to those of the Asp em leader His LBHBs in serine proteases. Possible structural bases and functional consequences for the different locations of the LBHB between these two types of enzymes are discussed. The results also underscore the importance of using specific isotope labeling, rather than extrapolation of NMR results from other enzyme systems, to assign the downfield proton resonance to a specific hydrogen bond. Although our studies did not permit the strength of the LBHB to be accurately measured, the data do not provide support for an unusually strong hydrogen bond strength (i.e. >10 kcal/mol).
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Affiliation(s)
- Ming Jye Poi
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH 43210, USA
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30
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Berg OG, Gelb MH, Tsai MD, Jain MK. Interfacial enzymology: the secreted phospholipase A(2)-paradigm. Chem Rev 2001; 101:2613-54. [PMID: 11749391 DOI: 10.1021/cr990139w] [Citation(s) in RCA: 266] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- O G Berg
- Evolutionary Biology Center, Uppsala University, Uppsala, Sweden
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31
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Baek HJ, Kwon SY, Kim S, Kim SS, Oh U, Hwang S, Chang HW, Lee BJ. Ligand binding inhibitors of A1 adenosine receptor from Rana rugosa are phospholipase A2s. EUROPEAN JOURNAL OF BIOCHEMISTRY 2000; 267:1340-6. [PMID: 10691971 DOI: 10.1046/j.1432-1327.2000.01102.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Inhibitors of the A1 adenosine receptor were isolated from the skin extract of Korean frog, Rana rugosa. The frog-skin extract was prepared by an electrical shock and fractionated with C4 followed by C18 reverse-phase HPLC. Two A1 receptor inhibitors were isolated using a filter binding assay and the molecular masses of the proteins were estimated by matrix-assisted laser desorption ionization time-of-flight mass spectrometry to be 15 347 and 15 404 Da, respectively. The inhibitory activity was also measured against other membrane receptors, such as the A2 adenosine receptor, muscarinic acetylcholine receptor and capsaicin receptor. Ligand binding to the A2 and muscarinic receptors was also severely inhibited by these proteins. However, they did not inhibit the functional activation of the capsaicin receptor by its ligand, capsaicin, suggesting that inhibition of ligand-receptor binding occurs specifically. Their N-terminal sequences were determined by Edman degradation. Surprisingly, they showed sequence similarity to the secretory protein, phospholipase A2 from various organisms. The phospholipase A2 activity of both proteins was tested using Dole's assay technique. Both proteins showed phospholipase A2 activity, and therefore, they were designated as PLA2-R1 and PLA2-R2, respectively. In addition, their ligand-binding inhibitory activity depended on their phospholipase A2 activity. This is the first finding that the frog secretes a phospholipase A2 similar to that of snake venoms, which posess inhibitory activity against the adenosine A1, adenosine A2 and muscarinic receptors.
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Affiliation(s)
- H J Baek
- Institute of Molecular Biology, Sensory Research Group, Seoul National University, Korea
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32
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Gelb MH, Cho W, Wilton DC. Interfacial binding of secreted phospholipases A(2): more than electrostatics and a major role for tryptophan. Curr Opin Struct Biol 1999; 9:428-32. [PMID: 10449366 DOI: 10.1016/s0959-440x(99)80059-1] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Secreted phospholipases A(2) have similar catalytic sites, but vastly different interfacial binding surfaces that modulate their binding affinity for different kinds of phospholipid vesicles by several orders of magnitude. The structure/function principles that dictate both the differential interfacial binding and the physiological function of these enzymes are beginning to be unraveled.
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Affiliation(s)
- M H Gelb
- Departments of Chemistry and Biochemistry, University of Washington, 351700, Seattle, WA 98195, USA.
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33
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Lin Y, Nielsen R, Murray D, Hubbell WL, Mailer C, Robinson BH, Gelb MH. Docking phospholipase A2 on membranes using electrostatic potential-modulated spin relaxation magnetic resonance. Science 1998; 279:1925-9. [PMID: 9506941 PMCID: PMC3443684 DOI: 10.1126/science.279.5358.1925] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
A method involving electron paramagnetic resonance spectroscopy of a site-selectively spin-labeled peripheral membrane protein in the presence and absence of membranes and of a water-soluble spin relaxant (chromium oxalate) has been developed to determine how bee venom phospholipase A2 sits on the membrane. Theory based on the Poisson-Boltzmann equation shows that the rate of spin relaxation of a protein-bound nitroxide by a membrane-impermeant spin relaxant depends on the distance (up to tens of angstroms) from the spin probe to the membrane. The measurements define the interfacial binding surface of this secreted phospholipase A2.
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Affiliation(s)
- Ying Lin
- Department of Chemistry and Department of Biochemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
| | - Robert Nielsen
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
| | - Diana Murray
- Department of Physiology, State University of New York at Stony Brook, Health Science Center, Stony Brook, NY, 11794-8661, USA
| | - Wayne L. Hubbell
- Jules Stein Eye Institute, Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90024-7008, USA
| | - Colin Mailer
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
| | - Bruce H. Robinson
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
| | - Michael H. Gelb
- Department of Chemistry and Department of Biochemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA
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34
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Nicolas JP, Lin Y, Lambeau G, Ghomashchi F, Lazdunski M, Gelb MH. Localization of structural elements of bee venom phospholipase A2 involved in N-type receptor binding and neurotoxicity. J Biol Chem 1997; 272:7173-81. [PMID: 9054413 DOI: 10.1074/jbc.272.11.7173] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We have shown previously that neurotoxic venom secretory phospholipases A2 (sPLA2s) have specific receptors in brain membranes called N-type receptors that are likely to play a role in the molecular events leading to neurotoxicity of these proteins. The sPLA2 found in honey bee venom is neurotoxic and binds to this receptor with high affinity. In this paper, we have used a number of mutants of bee venom sPLA2 produced in Escherichia coli to determine the structural elements of this protein that are involved in its binding to N-type receptors. Mutations in the interfacial binding surface, in the Ca2+-binding loop and in the hydrophobic channel lead to a dramatic decrease in binding to N-type receptors, whereas mutations of surface residues localized in other parts of the sPLA2 structure do not significantly modify the binding properties. Neurotoxicity experiments show that mutants with low affinity for N-type receptors are devoid of neurotoxic properties, even though some of them retain high enzymatic activity. These results provide further evidence for the involvement of N-type receptors in neurotoxic processes associated with venom sPLA2s and identify the surface region surrounding the hydrophobic channel of bee venom sPLA2 as the N-type receptor recognition domain.
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Affiliation(s)
- J P Nicolas
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, 660 Route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
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