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Garrido-Huarte JL, Fita-Torró J, Viana R, Pascual-Ahuir A, Proft M. Severe acute respiratory syndrome coronavirus-2 accessory proteins ORF3a and ORF7a modulate autophagic flux and Ca2+ homeostasis in yeast. Front Microbiol 2023; 14:1152249. [PMID: 37077240 PMCID: PMC10106705 DOI: 10.3389/fmicb.2023.1152249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023] Open
Abstract
Virus infection involves the manipulation of key host cell functions by specialized virulence proteins. The Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) small accessory proteins ORF3a and ORF7a have been implicated in favoring virus replication and spreading by inhibiting the autophagic flux within the host cell. Here, we apply yeast models to gain insights into the physiological functions of both SARS-CoV-2 small open reading frames (ORFs). ORF3a and ORF7a can be stably overexpressed in yeast cells, producing a decrease in cellular fitness. Both proteins show a distinguishable intracellular localization. ORF3a localizes to the vacuolar membrane, whereas ORF7a targets the endoplasmic reticulum. Overexpression of ORF3a and ORF7a leads to the accumulation of Atg8 specific autophagosomes. However, the underlying mechanism is different for each viral protein as assessed by the quantification of the autophagic degradation of Atg8-GFP fusion proteins, which is inhibited by ORF3a and stimulated by ORF7a. Overexpression of both SARS-CoV-2 ORFs decreases cellular fitness upon starvation conditions, where autophagic processes become essential. These data confirm previous findings on SARS-CoV-2 ORF3a and ORF7a manipulating autophagic flux in mammalian cell models and are in agreement with a model where both small ORFs have synergistic functions in stimulating intracellular autophagosome accumulation, ORF3a by inhibiting autophagosome processing at the vacuole and ORF7a by promoting autophagosome formation at the ER. ORF3a has an additional function in Ca2+ homeostasis. The overexpression of ORF3a confers calcineurin-dependent Ca2+ tolerance and activates a Ca2+ sensitive FKS2-luciferase reporter, suggesting a possible ORF3a-mediated Ca2+ efflux from the vacuole. Taken together, we show that viral accessory proteins can be functionally investigated in yeast cells and that SARS-CoV-2 ORF3a and ORF7a proteins interfere with autophagosome formation and processing as well as with Ca2+ homeostasis from distinct cellular targets.
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Affiliation(s)
- José Luis Garrido-Huarte
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Josep Fita-Torró
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Rosa Viana
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Amparo Pascual-Ahuir
- Department of Biotechnology, Instituto de Biología Molecular y Celular de Plantas, Universitat Politècnica de València UPV, Valencia, Spain
- *Correspondence: Amparo Pascual-Ahuir,
| | - Markus Proft
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
- Markus Proft,
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2
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Liu C, Shi K, Lyu K, Liu D, Wang X. The toxicity of neodymium and genome-scale genetic screen of neodymium-sensitive gene deletion mutations in the yeast Saccharomyces cerevisiae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:41439-41454. [PMID: 35088271 DOI: 10.1007/s11356-021-18100-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
The wide usage of neodymium (Nd) in industry, agriculture, and medicine has made it become an emerging pollutant in the environment. Increasing Nd pollution has potential hazards to plants, animals, and microorganisms. Thus, it is necessary to study the toxicity of Nd and the mechanism of Nd transportation and detoxification in microorganisms. Through genome-scale screening, we identified 70 yeast monogene deletion mutations sensitive to Nd ions. These genes are mainly involved in metabolism, transcription, protein synthesis, cell cycle, DNA processing, protein folding, modification, and cell transport processes. Furthermore, the regulatory networks of Nd toxicity were identified by using the protein interaction group analysis. These networks are associated with various signal pathways, including calcium ion transport, phosphate pathways, vesicular transport, and cell autophagy. In addition, the content of Nd ions in yeast was detected by an inductively coupled plasma mass spectrometry, and most of these Nd-sensitive mutants showed an increased intracellular Nd content. In all, our results provide the basis for understanding the molecular mechanisms of detoxifying Nd ions in yeast cells, which will be useful for future studies on Nd-related issues in the environment, agriculture, and human health.
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Affiliation(s)
- Chengkun Liu
- School of Life Sciences, Shandong University of Technology, Zibo, 255049, Shandong, China
| | - Kailun Shi
- School of Life Sciences, Shandong University of Technology, Zibo, 255049, Shandong, China
| | - Keliang Lyu
- School of Life Sciences, Shandong University of Technology, Zibo, 255049, Shandong, China
| | - Dongwu Liu
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255049, China
| | - Xue Wang
- School of Life Sciences, Shandong University of Technology, Zibo, 255049, Shandong, China
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3
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Palm D, Uzoni A, Simon F, Fischer M, Coogan A, Tucha O, Thome J, Faltraco F. Evolutionary conservations, changes of circadian rhythms and their effect on circadian disturbances and therapeutic approaches. Neurosci Biobehav Rev 2021; 128:21-34. [PMID: 34102148 DOI: 10.1016/j.neubiorev.2021.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 02/04/2021] [Accepted: 06/01/2021] [Indexed: 12/21/2022]
Abstract
The circadian rhythm is essential for the interaction of all living organisms with their environments. Several processes, such as thermoregulation, metabolism, cognition and memory, are regulated by the internal clock. Disturbances in the circadian rhythm have been shown to lead to the development of neuropsychiatric disorders, including attention-deficit hyperactivity disorder (ADHD). Interestingly, the mechanism of the circadian rhythms has been conserved in many different species, and misalignment between circadian rhythms and the environment results in evolutionary regression and lifespan reduction. This review summarises the conserved mechanism of the internal clock and its major interspecies differences. In addition, it focuses on effects the circadian rhythm disturbances, especially in cases of ADHD, and describes the possibility of recombinant proteins generated by eukaryotic expression systems as therapeutic agents as well as CRISPR/Cas9 technology as a potential tool for research and therapy. The aim is to give an overview about the evolutionary conserved mechanism as well as the changes of the circadian clock. Furthermore, current knowledge about circadian rhythm disturbances and therapeutic approaches is discussed.
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Affiliation(s)
- Denise Palm
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Adriana Uzoni
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Frederick Simon
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Matthias Fischer
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Andrew Coogan
- Department of Psychology, Maynooth University, National University of Ireland, Ireland
| | - Oliver Tucha
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Johannes Thome
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany
| | - Frank Faltraco
- Department of Psychiatry and Psychotherapy, University Medical Center Rostock, Rostock, Gehlsheimer Str. 20, 18147, Rostock, Germany.
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4
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Rapid transient expression of functional human vascular endothelial growth factor in Nicotiana benthamiana and characterization of its biological activity. ACTA ACUST UNITED AC 2020; 27:e00514. [PMID: 32884911 PMCID: PMC7453061 DOI: 10.1016/j.btre.2020.e00514] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/31/2020] [Accepted: 07/31/2020] [Indexed: 12/18/2022]
Abstract
Growth factors play a crucial role in wound healing. Plant-produced human vascular endothelial growth factor (hVEGF) induces the keratinocyte cells migration. The plant-produced hVEGF has shown potential as a wound healing agent in drug and cosmetic industry.
Human vascular endothelial growth factor (VEGF) is a potent pro-angiogenic growth factor essential for wound healing. Due to its potential applications, many expression strategies have been developed to produce high levels of VEGF. Here, we have optimized the expression conditions for the production of recombinant VEGF in Nicotiana benthamiana by using a geminiviral vector. Four different expression constructs that differ by the location of a C- or N-terminal histidine tag and SEKDEL sequence were developed and utilized for plant transient expression. The recombinant VEGF was further purified by using affinity chromatography and confirmed by SDS-PAGE and Western blotting probed with anti-VEGF antibody. Furthermore, our results showed that the recombinant VEGF in all tested concentrations did not exhibit any cytotoxic effect on HaCaT cells and induced cell migration in vitro. These findings show that the plant-produced VEGF has the potential to be used in regenerative medicine and cosmetic industry.
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5
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Baghban R, Farajnia S, Rajabibazl M, Ghasemi Y, Mafi A, Hoseinpoor R, Rahbarnia L, Aria M. Yeast Expression Systems: Overview and Recent Advances. Mol Biotechnol 2019; 61:365-384. [PMID: 30805909 DOI: 10.1007/s12033-019-00164-8] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Yeasts are outstanding hosts for the production of functional recombinant proteins with industrial or medical applications. Great attention has been emerged on yeast due to the inherent advantages and new developments in this host cell. For the production of each specific product, the most appropriate expression system should be identified and optimized both on the genetic and fermentation levels, considering the features of the host, vector and expression strategies. Currently, several new systems are commercially available; some of them are private and need licensing. The potential for secretory expression of heterologous proteins in yeast proposed this system as a candidate for the production of complex eukaryotic proteins. The common yeast expression hosts used for recombinant proteins' expression include Saccharomyces cerevisiae, Pichia pastoris, Hansenula polymorpha, Yarrowia lipolytica, Arxula adeninivorans, Kluyveromyces lactis, and Schizosaccharomyces pombe. This review is dedicated to discuss on significant characteristics of the most common methylotrophic and non-methylotrophic yeast expression systems with an emphasis on their advantages and new developments.
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Affiliation(s)
- Roghayyeh Baghban
- Medical Biotechnology Department, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran.,Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Biotechnology Research Center, Tabriz University of Medical Sciences, Daneshgah Ave, Tabriz, Iran
| | - Safar Farajnia
- Biotechnology Research Center, Tabriz University of Medical Sciences, Daneshgah Ave, Tabriz, Iran. .,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Masoumeh Rajabibazl
- Department of Clinical Biochemistry, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak, Arabi Ave, Tehran, Iran. .,Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Younes Ghasemi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - AmirAli Mafi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reyhaneh Hoseinpoor
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Rahbarnia
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Aria
- Biotechnology Research Center, Tabriz University of Medical Sciences, Daneshgah Ave, Tabriz, Iran
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6
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Ouyang X, Cha Y, Li W, Zhu C, Zhu M, Li S, Zhuo M, Huang S, Li J. Stepwise engineering of Saccharomyces cerevisiae to produce (+)-valencene and its related sesquiterpenes. RSC Adv 2019; 9:30171-30181. [PMID: 35530214 PMCID: PMC9072130 DOI: 10.1039/c9ra05558d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 09/09/2019] [Indexed: 12/12/2022] Open
Abstract
(+)-Valencene and (+)-nootkatone are high value-added sesquiterpenoids found in grapefruit. The synthesis of (+)-nootkatone by chemical oxidation from (+)-valencene cannot meet the increasing demand in natural aromatics markets. Development of a viable bioprocess using microorganisms is attractive. According to the yields of β-nootkatol and (+)-nootkatone by strains harboring different expression cassettes in the resting cell assay, premnaspirodiene oxygenase from Hyoscyamus muticus (HPO), cytochrome P450 reductase from Arabidopsis thaliana (AtCPR) and alcohol dehydrogenase (ADH1) from Saccharomyces cerevisiae were finally selected and overexpressed in CEN·PK2-1Ca, yielding β-nootkatol and (+)-nootkatone with 170.5 and 45.6 mg L−1 ethyl acetate, respectively. A combinational engineering strategy including promoter change, regulator ROX1 knockout, squalene pathway inhibition, and tHMGR overexpression was performed to achieve de novo (+)-valencene production. Subsequent culture investigations found that galactose as the induced carbon source and a lower temperature (25 °C) were beneficial to target accumulation. Also, replacing the inducible promoters (GAL1) of HPO and AtCPR with constitutive promoters (HXT7 and CYC1) dramatically increased the β-nootkatol accumulation from 108.2 to 327.8 mg L−1 ethyl acetate in resting-cell experiments using (+)-valencene as a substrate. Finally, the total terpenoid titer of the engineered strain of PK2-25 using glucose as a carbon source was improved to 157.8 mg L−1 cell culture, which was 56 times the initial value. We present a new candidate for production of (+)-valencene and its related sesquiterpenoids with attraction for industry. A new yeast-based platform for the biosynthesis of (+)-valencene and its related sesquiterpenes found in grapefruit.![]()
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Affiliation(s)
- Xiaodan Ouyang
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Yaping Cha
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Wen Li
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Chaoyi Zhu
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Muzi Zhu
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Institute of Microbiology
- Guangzhou 510070
- China
| | - Shuang Li
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Min Zhuo
- School of Biology and Biological Engineering
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Shaobin Huang
- School of Environment and Energy
- South China University of Technology
- Higher Education Mega Center
- Guangzhou 510006
- China
| | - Jianjun Li
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Institute of Microbiology
- Guangzhou 510070
- China
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7
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Asencio C, Chatterjee A, Hentze MW. Silica-based solid-phase extraction of cross-linked nucleic acid-bound proteins. Life Sci Alliance 2018; 1:e201800088. [PMID: 30035255 PMCID: PMC6054301 DOI: 10.26508/lsa.201800088] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The 2C method allows the rapid and straightforward isolation of nucleic acid–protein complexes, greatly simplifying downstream applications for the study of DNA– and RNA–protein interactions. Proteins interact with nucleic acids to regulate cellular functions. The study of these regulatory interactions is often hampered by the limited efficiency of current protocols to isolate the relevant nucleic acid–protein complexes. In this report, we describe a rapid and simple procedure to highly enrich cross-linked nucleic acid–bound proteins, referred to as “2C” for “complex capture.” This method is based on the observation that silica matrix–based columns used for nucleic acid purification also effectively retain UV cross-linked nucleic acid–protein complexes. As a proof of principle, 2C was used to isolate RNA-bound proteins from yeast and mammalian Huh7 cells. The 2C method makes RNA labelling redundant, and specific RNA–protein interactions can be observed and validated by Western blotting. RNA–protein complexes isolated by 2C can subsequently be immunoprecipitated, showing that 2C is in principle compatible with sensitive downstream applications. We suggest that 2C can dramatically simplify the study of nucleic acid–protein interactions and benefit researchers in the fields of DNA and RNA biology.
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Affiliation(s)
- Claudio Asencio
- European Molecular Biology Laboratory, Heidelberg, Germany.,Centro Andaluz de Biología del Desarrollo, Universidad Pablo Olavide, Sevilla, Spain
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8
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Shao Y, Li M, Wu M, Shi K, Fang B, Wang J. FAD-linked Presenilin-1 V97L mutation impede tranport regulation and intracellular Ca(2+) homeostasis under ER stress. Int J Clin Exp Med 2015; 8:20742-20750. [PMID: 26884997 PMCID: PMC4723842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 10/16/2015] [Indexed: 06/05/2023]
Abstract
We report a PS1 gene mutation (Val 97Leu) in a Chinese familial Alzheimer's disease (FAD) pedigree and a cell model of FAD built by transfecting PS1 v97L mutants into human neuroblastoma SH-SY5Y cells. To test our hypothesis that the PS1 v97L mutation is pathogenic, we investigated possible alterations in transport regulation and intracellular Ca(2+) homeostasis in endoplasmic reticulum (ER). Grp78 is an ER-resident chaperone mediating the unfolded protein response (UPR) and is a key regulator of ER stress transducers. KDEL is a 4-amino-acid retention sequence made of Lys-Asp-Glu-Leu-COO. KDEL is a "resident" sequence as protein residence in ER is consistently associated with KDEL at the C-extremity. Our group used KDEL recognizing anti-Grp78 monoclonal antibody to detect the level of Grp78. We found increased KDEL level in all the transfected cells including cells transfected with PS1 V97L genes, wild-type and the mock. However cells with PS1 V97L mutation expressed a relatively lower KDEL compared with the wild-type and the mock, and a significantly lower Grp78 level compared with the wild-type, the mock and control. These results suggest that PS1 V97L mutation impedes intracellular transport regulation in ER. PS1 V97L mutation mediates increased ER Ca(2+) content in human neuroblastoma SH-SY5Y cells. The increased intracellular Ca(2+) release is due to depleted Ca(2+) storing content of ER but not due to extracellular environment as capacitative Ca(2+) entry (CCE) is invariant. PS1 V97L mutation interferes with intracellular Ca(2+) homeostasis. Abnormal transport regulation and Ca(2+) homeostasis attributed to PS1 V97L mutation may be associated with the pathology of Chinese familial FAD.
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Affiliation(s)
- Yankun Shao
- Department of Neurology, The China-Japan Union Hospital of Jilin University130033, China
| | - Miao Li
- Department of Neurosurgery, The China-Japan Union Hospital of Jilin University130033, China
| | - Miao Wu
- Department of Neurology, The China-Japan Union Hospital of Jilin University130033, China
| | - Kai Shi
- Department of Neurology, The China-Japan Union Hospital of Jilin University130033, China
| | - Boyan Fang
- Department of Neurology, Xuan Wu Hospital of The Capital University of Medical Sciences, Neurodegenerative Lab of Ministry of Education of The People’s Republic of ChinaBeijing 100053, China
| | - Jie Wang
- Department of Neurology, The China-Japan Union Hospital of Jilin University130033, China
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9
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Markowska K, Maciaszczyk‐Dziubinska E, Migocka M, Wawrzycka D, Wysocki R. Identification of critical residues for transport activity of
A
cr3p, the
S
accharomyces cerevisiae
A
s(
III
)/
H
+
antiporter. Mol Microbiol 2015; 98:162-74. [DOI: 10.1111/mmi.13113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Katarzyna Markowska
- Institute of Experimental Biology University of Wroclaw 50‐328 Wroclaw Poland
| | | | - Magdalena Migocka
- Institute of Experimental Biology University of Wroclaw 50‐328 Wroclaw Poland
| | - Donata Wawrzycka
- Institute of Experimental Biology University of Wroclaw 50‐328 Wroclaw Poland
| | - Robert Wysocki
- Institute of Experimental Biology University of Wroclaw 50‐328 Wroclaw Poland
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10
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Mith O, Benhamdi A, Castillo T, Bergé M, MacDiarmid CW, Steffen J, Eide DJ, Perrier V, Subileau M, Gosti F, Berthomieu P, Marquès L. The antifungal plant defensin AhPDF1.1b is a beneficial factor involved in adaptive response to zinc overload when it is expressed in yeast cells. Microbiologyopen 2015; 4:409-22. [PMID: 25755096 PMCID: PMC4475384 DOI: 10.1002/mbo3.248] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 01/06/2015] [Accepted: 02/02/2015] [Indexed: 11/17/2022] Open
Abstract
Antimicrobial peptides represent an expanding family of peptides involved in innate immunity of many living organisms. They show an amazing diversity in their sequence, structure, and mechanism of action. Among them, plant defensins are renowned for their antifungal activity but various side activities have also been described. Usually, a new biological role is reported along with the discovery of a new defensin and it is thus not clear if this multifunctionality exists at the family level or at the peptide level. We previously showed that the plant defensin AhPDF1.1b exhibits an unexpected role by conferring zinc tolerance to yeast and plant cells. In this paper, we further explored this activity using different yeast genetic backgrounds: especially the zrc1 mutant and an UPRE-GFP reporter yeast strain. We showed that AhPDF1.1b interferes with adaptive cell response in the endoplasmic reticulum to confer cellular zinc tolerance. We thus highlighted that, depending on its cellular localization, AhPDF1.1b exerts quite separate activities: when it is applied exogenously, it is a toxin against fungal and also root cells, but when it is expressed in yeast cells, it is a peptide that modulates the cellular adaptive response to zinc overload.
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Affiliation(s)
- Oriane Mith
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Asma Benhamdi
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Teddy Castillo
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Muriel Bergé
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Colin W MacDiarmid
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, Wisconsin, 53706
| | - Janet Steffen
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, Wisconsin, 53706
| | - David J Eide
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, Wisconsin, 53706
| | - Véronique Perrier
- INRA/CIRAD UMR 1028 IATE Ingénierie des Agropolymères et Technologies Emergentes, Montpellier SupAgro/Université Montpellier 2, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Maeva Subileau
- INRA/CIRAD UMR 1028 IATE Ingénierie des Agropolymères et Technologies Emergentes, Montpellier SupAgro/Université Montpellier 2, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Françoise Gosti
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Pierre Berthomieu
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
| | - Laurence Marquès
- INRA/CNRS UMR B&PMP, Biochimie et Physiologie Moléculaire des Plantes, Montpellier SupAgro/Université Montpellier 2, Campus Montpellier SupAgro, 2 Place Viala, F-34060, Montpellier Cedex 2, France
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11
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Blocker KM, Britton ZT, Naranjo AN, McNeely PM, Young CL, Robinson AS. Recombinant G Protein-Coupled Receptor Expression in Saccharomyces cerevisiae for Protein Characterization. Methods Enzymol 2015; 556:165-83. [DOI: 10.1016/bs.mie.2014.12.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Young CL, Robinson AS. Protein folding and secretion: mechanistic insights advancing recombinant protein production in S. cerevisiae. Curr Opin Biotechnol 2014; 30:168-77. [PMID: 25032908 DOI: 10.1016/j.copbio.2014.06.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 06/19/2014] [Accepted: 06/22/2014] [Indexed: 10/25/2022]
Abstract
The emergence of genomic approaches coupled to recombinant DNA technologies have identified the quality control systems that regulate proteostasis - biological pathways that modulate protein biogenesis, maturation, trafficking, and degradation. The elucidation of these pathways has become of growing importance in therapeutics as loss of proteostasis has been suggested to lead to a number of human diseases including Alzheimer's, Parkinson's Disease and Type II Diabetes. We anticipate that the most successful strategies for protein expression and therapeutics development may involve integration of protein engineering strategies with host manipulation, to exploit the cell's native stress response pathways and trafficking mechanisms. This review will highlight recent findings and mechanistic detail correlated to quality control in the early secretory pathway of Saccharomyces cerevisiae.
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Affiliation(s)
- Carissa L Young
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Anne S Robinson
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, LA 70118, United States.
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Griesemer M, Young C, Robinson AS, Petzold L. BiP clustering facilitates protein folding in the endoplasmic reticulum. PLoS Comput Biol 2014; 10:e1003675. [PMID: 24991821 PMCID: PMC4081015 DOI: 10.1371/journal.pcbi.1003675] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 05/03/2014] [Indexed: 12/26/2022] Open
Abstract
The chaperone BiP participates in several regulatory processes within the endoplasmic reticulum (ER): translocation, protein folding, and ER-associated degradation. To facilitate protein folding, a cooperative mechanism known as entropic pulling has been proposed to demonstrate the molecular-level understanding of how multiple BiP molecules bind to nascent and unfolded proteins. Recently, experimental evidence revealed the spatial heterogeneity of BiP within the nuclear and peripheral ER of S. cerevisiae (commonly referred to as 'clusters'). Here, we developed a model to evaluate the potential advantages of accounting for multiple BiP molecules binding to peptides, while proposing that BiP's spatial heterogeneity may enhance protein folding and maturation. Scenarios were simulated to gauge the effectiveness of binding multiple chaperone molecules to peptides. Using two metrics: folding efficiency and chaperone cost, we determined that the single binding site model achieves a higher efficiency than models characterized by multiple binding sites, in the absence of cooperativity. Due to entropic pulling, however, multiple chaperones perform in concert to facilitate the resolubilization and ultimate yield of folded proteins. As a result of cooperativity, multiple binding site models used fewer BiP molecules and maintained a higher folding efficiency than the single binding site model. These insilico investigations reveal that clusters of BiP molecules bound to unfolded proteins may enhance folding efficiency through cooperative action via entropic pulling.
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Affiliation(s)
- Marc Griesemer
- Department of Applied Mathematics, University of California, Merced, Merced, California, United States of America
- * E-mail:
| | - Carissa Young
- Department of Chemical Engineering, University of Delaware, Newark, Delaware, United States of America
| | - Anne S. Robinson
- Department of Chemical Engineering, University of Delaware, Newark, Delaware, United States of America
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana, United States of America
| | - Linda Petzold
- Department of Computer Science, University of California, Santa Barbara, Santa Barbara, California, United States of America
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Approaches to imaging unfolded secretory protein stress in living cells. ENDOPLASMIC RETICULUM STRESS IN DISEASES 2014; 1:27-39. [PMID: 25419521 DOI: 10.2478/ersc-2014-0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The endoplasmic reticulum (ER) is the point of entry of proteins into the secretory pathway. Nascent peptides interact with the ER quality control machinery that ensures correct folding of the nascent proteins. Failure to properly fold proteins can lead to loss of protein function and cytotoxic aggregation of misfolded proteins that can lead to cell death. To cope with increases in the ER unfolded secretory protein burden, cells have evolved the Unfolded Protein Response (UPR). The UPR is the primary signaling pathway that monitors the state of the ER folding environment. When the unfolded protein burden overwhelms the capacity of the ER quality control machinery, a state termed ER stress, sensor proteins detect accumulation of misfolded peptides and trigger the UPR transcriptional response. The UPR, which is conserved from yeast to mammals, consists of an ensemble of complex signaling pathways that aims at adapting the ER to the new misfolded protein load. To determine how different factors impact the ER folding environment, various tools and assays have been developed. In this review, we discuss recent advances in live cell imaging reporters and model systems that enable researchers to monitor changes in the unfolded secretory protein burden and activation of the UPR and its associated signaling pathways.
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15
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Multiple cysteine residues are necessary for sorting and transport activity of the arsenite permease Acr3p from Saccharomyces cerevisiae. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1838:747-55. [PMID: 24291645 DOI: 10.1016/j.bbamem.2013.11.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 11/13/2013] [Accepted: 11/20/2013] [Indexed: 11/21/2022]
Abstract
The yeast transporter Acr3p is a low affinity As(III)/H(+) and Sb(III)/H(+) antiporter located in the plasma membrane. It has been shown for bacterial Acr3 proteins that just a single cysteine residue, which is located in the middle of the fourth transmembrane region and conserved in all members of the Acr3 family, is essential for As(III) transport activity. Here, we report a systematic mutational analysis of all nine cysteine residues present in the Saccharomyces cerevisiae Acr3p. We found that mutagenesis of highly conserved Cys151 resulted in a complete loss of metalloid transport function. In addition, lack of Cys90 and Cys169, which are conserved in eukaryotic members of Acr3 family, impaired Acr3p trafficking to the plasma membrane and greatly reduced As(III) efflux, respectively. Mutagenesis of five other cysteines in Acr3p resulted in moderate reduction of As(III) transport capacities and sorting perturbations. Our data suggest that interaction of As(III) with multiple thiol groups in the yeast Acr3p may facilitate As(III) translocation across the plasma membrane.
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