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de Oliveira TA, Silva WD, da Rocha Torres N, Badaró de Moraes JV, Senra RL, de Oliveira Mendes TA, Júnior AS, Bressan GC, Fietto JLR. Application of the LEXSY Leishmania tarentolae system as a recombinant protein expression platform: A review. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.08.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Doukas A, Karena E, Botou M, Papakostas K, Papadaki A, Tziouvara O, Xingi E, Frillingos S, Boleti H. Heterologous expression of the mammalian sodium-nucleobase transporter rSNBT1 in Leishmania tarentolae. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:1546-1557. [PMID: 31283918 DOI: 10.1016/j.bbamem.2019.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 12/13/2022]
Abstract
Recombinant expression systems for mammalian membrane transport proteins are often limited by insufficient yields to support structural studies, inadequate post-translational processing and problems related with improper membrane targeting or cytotoxicity. Use of alternative expression systems and optimization of expression/purification protocols are constantly needed. In this work, we explore the applicability of the laboratory strain LEXSY of the ancient eukaryotic microorganism Leishmania tarentolae as a new expression system for mammalian nucleobase permeases of the NAT/NCS2 (Nucleobase-Ascorbate Transporter/Nucleobase-Cation Symporter-2) family. We achieved the heterologous expression of the purine-pyrimidine permease rSNBT1 from Rattus norvegicus (tagged at C-terminus with a red fluorescent protein), as confirmed by confocal microscopy and biochemical analysis of the subcellular fractions enriched in membrane proteins. The cDNA of rSNBT1 has been subcloned in a pLEXSY-sat-mrfp1vector and used to generate transgenic L. tarentolae-rsnbt1-mrfp1 strains carrying the pLEXSY-sat-rsnbt1-mrfp1 plasmid either episomally or integrated in the chromosomal DNA. The chimeric transporter rSNBT1-mRFP1 is targeted to the ER and the plasma membrane of the L. tarentolae promastigotes. The transgenic strains are capable of transporting nucleobases that are substrates of rSNBT1 but also of the endogenous L. tarentolae nucleoside/nucleobase transporters. A dipyridamole-resistant Na+-dependent fraction of uptake is attributed to the exogenously expressed rSNBT1.
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Affiliation(s)
- Anargyros Doukas
- Intracellular Parasitism Group, Microbiology Department, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece
| | - Ekaterini Karena
- Laboratory of Biological Chemistry, Department of Medicine, University of Ioannina, Greece
| | - Maria Botou
- Laboratory of Biological Chemistry, Department of Medicine, University of Ioannina, Greece
| | | | - Amalia Papadaki
- Intracellular Parasitism Group, Microbiology Department, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece
| | - Olympia Tziouvara
- Intracellular Parasitism Group, Microbiology Department, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece
| | - Evaggelia Xingi
- Light Microscopy Unit, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece
| | - Stathis Frillingos
- Laboratory of Biological Chemistry, Department of Medicine, University of Ioannina, Greece.
| | - Haralabia Boleti
- Intracellular Parasitism Group, Microbiology Department, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece; Light Microscopy Unit, Hellenic Pasteur Institute, Vas. Sofias 127, Athens 11521, Greece.
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Bergam P, Reisecker JM, Rakvács Z, Kucsma N, Raposo G, Szakacs G, van Niel G. ABCB6 Resides in Melanosomes and Regulates Early Steps of Melanogenesis Required for PMEL Amyloid Matrix Formation. J Mol Biol 2018; 430:3802-3818. [PMID: 29940187 DOI: 10.1016/j.jmb.2018.06.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/11/2018] [Accepted: 06/15/2018] [Indexed: 01/08/2023]
Abstract
Genetically inheritable pigmentation defects provide a unique opportunity to reveal the function of proteins contributing to melanogenesis. Dyschromatosis universalis hereditaria (DUH) is a rare pigmentary genodermatosis associated with mutations in the ABCB6 gene. Here we use optical and electron microscopy imaging combined with biochemical tools to investigate the localization and function of ABCB6 in pigment cells. We show that ABCB6 localizes to the membrane of early melanosomes and lysosomes of the human melanocytic cell line MNT-1. Depletion of ABCB6 by siRNA impaired PMEL amyloidogenesis in early melanosomes and induced aberrant accumulation of multilamellar aggregates in pigmented melanosomes. PMEL fibril formation and normal maturation of pigmented melanosomes could be restored by the overexpression of wild-type ABCB6 but not by variants containing an inactivating catalytic mutation (K629M) or the G579E DUH mutation. In line with the impairment of PMEL matrix formation in the absence of ABCB6, morphological analysis of the retinal pigment epithelium of ABCB6 knockout mice revealed a significant decrease of melanosome numbers. Our study extends the localization of ABCB6 to melanosomes, suggesting a potential link between the function of ABCB6 and the etiology of DUH to amyloid formation in pigment cells.
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Affiliation(s)
- Ptissam Bergam
- Institut Curie, PSL Research University, UMR144, Centre de Recherche, 26 rue d'Ulm, 75231 Paris, France; Centre National de la Recherche Scientifique, UMR144, Paris F-75248, France; Cell and Tissue Imaging Core Facility PICT-IBiSA, Institut Curie, Paris, France
| | | | - Zsófia Rakvács
- Institute of Enzymology, Research Centre for National Sciences, HAS, Budapest 1117, Hungary
| | - Nóra Kucsma
- Institute of Enzymology, Research Centre for National Sciences, HAS, Budapest 1117, Hungary
| | - Graça Raposo
- Institut Curie, PSL Research University, UMR144, Centre de Recherche, 26 rue d'Ulm, 75231 Paris, France; Centre National de la Recherche Scientifique, UMR144, Paris F-75248, France; Cell and Tissue Imaging Core Facility PICT-IBiSA, Institut Curie, Paris, France
| | - Gergely Szakacs
- Institute of Cancer Research, Medical University Vienna, Vienna, Austria; Institute of Enzymology, Research Centre for National Sciences, HAS, Budapest 1117, Hungary.
| | - Guillaume van Niel
- Institut Curie, PSL Research University, UMR144, Centre de Recherche, 26 rue d'Ulm, 75231 Paris, France; Centre National de la Recherche Scientifique, UMR144, Paris F-75248, France; Cell and Tissue Imaging Core Facility PICT-IBiSA, Institut Curie, Paris, France; Center for Psychiatry and Neuroscience, Hopital Saint-Anne, Université Descartes, INSERM U894, Paris, France.
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El-Awady R, Saleh E, Hashim A, Soliman N, Dallah A, Elrasheed A, Elakraa G. The Role of Eukaryotic and Prokaryotic ABC Transporter Family in Failure of Chemotherapy. Front Pharmacol 2017; 7:535. [PMID: 28119610 PMCID: PMC5223437 DOI: 10.3389/fphar.2016.00535] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 12/23/2016] [Indexed: 12/13/2022] Open
Abstract
Over the years chemotherapy failure has been a vital research topic as researchers have been striving to discover reasons behind it. The extensive studies carried out on chemotherapeutic agents confirm that resistance to chemotherapy is a major reason for treatment failure. “Resistance to chemotherapy,” however, is a comprehensive phrase that refers to a variety of different mechanisms in which ATP-binding cassette (ABC) mediated efflux dominates. The ABC is one of the largest gene superfamily of transporters among both eukaryotes and prokaryotes; it represents a variety of genes that code for proteins, which perform countless functions, including drug efflux – a natural process that protects cells from foreign chemicals. Up to date, chemotherapy failure due to ABC drug efflux is an active research topic that continuously provides further evidence on multiple drug resistance (MDR), aiding scientists in tackling and overcoming this issue. This review focuses on drug resistance by ABC efflux transporters in human, viral, parasitic, fungal and bacterial cells and highlights the importance of the MDR permeability glycoprotein being the mutual ABC transporter among all studied organisms. Current developments and future directions to overcome this problem are also discussed.
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Affiliation(s)
- Raafat El-Awady
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
| | - Ekram Saleh
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of SharjahSharjah, United Arab Emirates; National Cancer Institute - Cancer Biology Department, Cairo UniversityCairo, Egypt
| | - Amna Hashim
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
| | - Nehal Soliman
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
| | - Alaa Dallah
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
| | - Azza Elrasheed
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
| | - Ghada Elakraa
- Department of Pharmacy Practice and Pharmacotherapeutics, Sharjah Institute for Medical Research and College of Pharmacy, University of Sharjah Sharjah, United Arab Emirates
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