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Friudenberg AD, Anne S, Peterson RL. Characterization of a High-Affinity Copper Transporter in the White-Nose Syndrome Causing Fungal Pathogen Pseudogymnoascus destructans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.28.610057. [PMID: 39253504 PMCID: PMC11383314 DOI: 10.1101/2024.08.28.610057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
Copper is an essential micronutrient and the ability to scavenge tightly bound or trace levels of copper ions at the host-pathogen interface is vital for fungal proliferation in animal hosts. Recent studies suggest that trace metal ion acquisition is critical for the establishment and propagation of Pseudogymnoascus destructans, the fungal pathogen responsible for white-nose syndrome (WNS), on their bat host. However, little is known about these metal acquisition pathways in P. destructans. In this study, we report the characterization of the P. destructans high-affinity copper transporter VC83_00191 (PdCTR1a), which is implicated as a virulence factor associated with the WNS disease state. Using Saccharomyces cerevisiae as a recombinant expression host, we find that PdCTR1a localizes to the cell surface plasma membrane and can efficiently traffic Cu-ions into the yeast cytoplasm. Complementary studies in the native P. destructans fungus provide evidence that PdCTR1a transcripts and protein levels are dictated by Cu-bioavailability in the growth media. Our study demonstrates that PdCTR1a is a functional high-affinity copper transporter and is relevant to Cu-homeostasis pathways in P. destructans.
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Affiliation(s)
- Alyssa D Friudenberg
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, Texas, United States, 78666
| | - Saika Anne
- Department of Biology, Texas State University, 601 University Drive, San Marcos, Texas, United States, 78666
| | - Ryan L Peterson
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, Texas, United States, 78666
- Department of Biology, Texas State University, 601 University Drive, San Marcos, Texas, United States, 78666
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2
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Errichiello F, Picariello L, Forino M, Blaiotta G, Petruzziello E, Moio L, Gambuti A. Copper (II) Level in Musts Affects Acetaldehyde Concentration, Phenolic Composition, and Chromatic Characteristics of Red and White Wines. Molecules 2024; 29:2907. [PMID: 38930972 PMCID: PMC11206618 DOI: 10.3390/molecules29122907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/06/2024] [Accepted: 06/15/2024] [Indexed: 06/28/2024] Open
Abstract
Copper (II), a vital fungicide in organic viticulture, also acts as a wine oxidation catalyst. However, limited data are currently available on the impact that maximum allowed copper (II) ion doses in wine grapes at harvest can have on aged wine quality. This was the focus of the present study. We investigated the copper (II) effects by producing both white and red wines from musts containing three initial metal concentrations according to the limits set for organic farming. In detail, the influence of copper (II) on fermentation evolution, chromatic characteristics, and phenolic compounds was evaluated. Interestingly, the white wine obtained with the highest permitted copper (II) dose initially exceeded the concentration of 1.0 mg/L at fermentation completion. However, after one year of storage, the copper (II) content fell below 0.2 ± 0.01 mg/L. Conversely, red wines showed copper (II) levels below 1.0 mg/L at the end of fermentation, but the initial copper (II) level in musts significantly affected total native anthocyanins, color intensity, hue, and acetaldehyde concentration. After 12-month aging, significant differences were observed in polymeric pigments, thus suggesting a potential long-term effect of copper (II) on red wine color stability.
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Affiliation(s)
| | | | - Martino Forino
- Department of Agricultural Sciences, Grape and Wine Science Division, University of Naples “Federico II”, 83100 Avellino, Italy; (F.E.); (L.P.); (G.B.); (E.P.); (L.M.); (A.G.)
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3
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Zhang X, Kebaara BW. Nonsense-mediated mRNA decay of metal-binding activator MAC1 is dependent on copper levels and 3'-UTR length in Saccharomyces cerevisiae. Curr Genet 2024; 70:5. [PMID: 38709348 DOI: 10.1007/s00294-024-01291-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 04/12/2024] [Accepted: 04/22/2024] [Indexed: 05/07/2024]
Abstract
The nonsense-mediated mRNA decay (NMD) pathway was initially identified as a surveillance pathway that degrades mRNAs containing premature termination codons (PTCs). NMD is now also recognized as a post-transcriptional regulatory pathway that regulates the expression of natural mRNAs. Earlier studies demonstrated that regulation of functionally related natural mRNAs by NMD can be differential and condition-specific in Saccharomyces cerevisiae. Here, we investigated the regulation of MAC1 mRNAs by NMD in response to copper as well as the role the MAC1 3'-UTR plays in this regulation. MAC1 is a copper-sensing transcription factor that regulates the high-affinity copper uptake system. MAC1 expression is activated upon copper deprivation. We found that MAC1 mRNAs are regulated by NMD under complete minimal (CM) but escaped NMD under low and high copper conditions. Mac1 protein regulated gene, CTR1 is not regulated by NMD in conditions where MAC1 mRNAs are NMD sensitive. We also found that the MAC1 3'-UTR is the NMD targeting feature on the mRNAs, and that MAC1 mRNAs lacking 3'-UTRs were stabilized during copper deprivation. Our results demonstrate a mechanism of regulation for a metal-sensing transcription factor, at both the post-transcriptional and post-translational levels, where MAC1 mRNA levels are regulated by NMD and copper, while the activity of Mac1p is controlled by copper levels.
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Affiliation(s)
- Xinyi Zhang
- Department of Biology, Baylor University, One Bear Place #97388, Waco, TX, 76798, USA
| | - Bessie W Kebaara
- Department of Biology, Baylor University, One Bear Place #97388, Waco, TX, 76798, USA.
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4
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De Guidi I, Galeote V, Blondin B, Legras JL. Copper-based grape pest management has impacted wine aroma. Sci Rep 2024; 14:10124. [PMID: 38698114 PMCID: PMC11066116 DOI: 10.1038/s41598-024-60335-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 04/22/2024] [Indexed: 05/05/2024] Open
Abstract
Despite the high energetic cost of the reduction of sulfate to H2S, required for the synthesis of sulfur-containing amino acids, some wine Saccharomyces cerevisiae strains have been reported to produce excessive amounts of H2S during alcoholic fermentation, which is detrimental to wine quality. Surprisingly, in the presence of sulfite, used as a preservative, wine strains produce more H2S than wild (oak) or wine velum (flor) isolates during fermentation. Since copper resistance caused by the amplification of the sulfur rich protein Cup1p is a specific adaptation trait of wine strains, we analyzed the link between copper resistance mechanism, sulfur metabolism and H2S production. We show that a higher content of copper in the must increases the production of H2S, and that SO2 increases the resistance to copper. Using a set of 51 strains we observed a positive and then negative relation between the number of copies of CUP1 and H2S production during fermentation. This complex pattern could be mimicked using a multicopy plasmid carrying CUP1, confirming the relation between copper resistance and H2S production. The massive use of copper for vine sanitary management has led to the selection of resistant strains at the cost of a metabolic tradeoff: the overproduction of H2S, resulting in a decrease in wine quality.
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Affiliation(s)
- Irene De Guidi
- SPO, INRAE, Institut Agro, Université de Montpellier, 34060, Montpellier, France
| | - Virginie Galeote
- SPO, INRAE, Institut Agro, Université de Montpellier, 34060, Montpellier, France
| | - Bruno Blondin
- SPO, INRAE, Institut Agro, Université de Montpellier, 34060, Montpellier, France
| | - Jean-Luc Legras
- SPO, INRAE, Institut Agro, Université de Montpellier, 34060, Montpellier, France.
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5
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Kim JE, Jeon S, Lindahl PA. Discovery of an unusual copper homeostatic mechanism in yeast cells respiring on minimal medium and an unexpectedly diverse labile copper pool. J Biol Chem 2023; 299:105435. [PMID: 37944620 PMCID: PMC10704325 DOI: 10.1016/j.jbc.2023.105435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023] Open
Abstract
Copper is essential for all eukaryotic cells but many details of how it is trafficked within the cell and how it is homeostatically regulated remain uncertain. Here, we characterized the copper content of cytosol and mitochondria using liquid chromatography with ICP-MS detection. Chromatograms of cytosol exhibited over two dozen peaks due to copper proteins and coordination complexes. Yeast cells respiring on minimal media did not regulate copper import as media copper concentration increased; rather, they imported copper at increasing rates while simultaneously increasing the expression of metallothionein CUP1 which then sequestered most of the excessive imported copper. Peak intensities due to superoxide dismutase SOD1, other copper proteins, and numerous coordination complexes also increased, but not as drastically. The labile copper pool was unexpectedly diverse and divided into two groups. One group approximately comigrated with copper-glutathione, -cysteine, and -histidine standards; the other developed only at high media copper concentrations and at greater elution volumes. Most cytosolic copper arose from copper-bound proteins, especially CUP1. Cytosol contained an unexpectedly high percentage of apo-copper proteins and apo-coordination complexes. Copper-bound forms of non-CUP1 proteins and complexes coexisted with apo-CUP1 and with the chelator BCS. Both experiments suggest unexpectedly stable-binding copper proteins and coordination complexes in cytosol. COX17Δ cytosol chromatograms were like those of WT cells. Chromatograms of soluble mitochondrial extracts were obtained, and mitoplasting helped distinguish copper species in the intermembrane space versus in the matrix/inner membrane. Issues involving the yeast copperome, copper homeostasis, labile copper pool, and copper trafficking are discussed.
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Affiliation(s)
- Joshua E Kim
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | - Seoyoung Jeon
- Department of Chemistry, Texas A&M University, College Station, Texas, USA
| | - Paul A Lindahl
- Department of Chemistry, Texas A&M University, College Station, Texas, USA; Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, USA.
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Yoshikawa Y, Nasuno R, Takaya N, Takagi H. Metallothionein Cup1 attenuates nitrosative stress in the yeast Saccharomyces cerevisiae. MICROBIAL CELL (GRAZ, AUSTRIA) 2023; 10:170-177. [PMID: 37545644 PMCID: PMC10399457 DOI: 10.15698/mic2023.08.802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 08/08/2023]
Abstract
Metallothionein (MT), which is a small metal-binding protein with cysteine-rich motifs, functions in the detoxification of heavy metals in a variety of organisms. Even though previous studies suggest that MT is involved in the tolerance mechanisms against nitrosative stress induced by toxic levels of nitric oxide (NO) in mammalian cells, the physiological functions of MT in relation to NO have not been fully understood. In this study, we analyzed the functions of MT in nitrosative stress tolerance in the yeast Saccharomyces cerevisiae. Our phenotypic analyses showed that deletion or overexpression of the MT-encoding gene, CUP1, led to higher sensitivity or tolerance to nitrosative stress in S. cerevisiae cells, respectively. We further examined whether the yeast MT Cup1 in the cell-free lysate scavenges NO. These results showed that the cell-free lysate containing a higher level of Cup1 degraded NO more efficiently. On the other hand, the transcription level of CUP1 was not affected by nitrosative stress treatment. Our findings suggest that the yeast MT Cup1 contributes to nitrosative stress tolerance, possibly as a constitutive rather than an inducible defense mechanism.
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Affiliation(s)
- Yuki Yoshikawa
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
- Present address: Department of Biotechnology, Faculty of Bioresource Science, Akita Prefectural University, 241-438 Kaidoubata-Nishi, Shimoshinjo-Nakano, Akita, Akita 010-0195, Japan
| | - Ryo Nasuno
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
- Present address: Engineering Biology Research Center, Kobe University, 7-1-48, Minatojima Minami-machi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Naoki Takaya
- Faculty of Life and Environmental Sciences, Microbiology Research Center for Sustainability, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Hiroshi Takagi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
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7
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Junejo B, Eryilmaz M, Rizvanoglu SS, Palabiyik IM, Ghumro T, Mallah A, Solangi AR, Hyder SI, Maleh HK, Dragoi EN. Pharmacological assessment of Co 3O 4, CuO, NiO and ZnO nanoparticles via antibacterial, anti-biofilm and anti-quorum sensing activities. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:2840-2851. [PMID: 37318927 PMCID: wst_2023_150 DOI: 10.2166/wst.2023.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Infectious diseases have risen dramatically as a result of the resistance of many common antibiotics. Nanotechnology provides a new avenue of investigation for the development of antimicrobial agents that effectively combat infection. The combined effects of metal-based nanoparticles (NPs) are known to have intense antibacterial activities. However, a comprehensive analysis of some NPs regarding these activities is still unavailable. This study uses the aqueous chemical growth method to synthesize Co3O4, CuO, NiO and ZnO NPs. The prepared materials were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction techniques. The antibacterial activities of NPs were tested against Gram-positive and Gram-negative bacteria using the microdilution method, such as the minimum inhibitory concentration (MIC) method. The best MIC value among all the metal oxide NPs was 0.63 against Staphylococcus epidermidis ATCC12228 through ZnO NPs. The other metal oxide NPs also showed satisfactory MIC values against different test bacteria. In addition, the biofilm inhibition and antiquorum sensing activities of NPs were also examined. The present study presents a novel approach for the relative analysis of metal-based NPs in antimicrobial studies, demonstrating their potential for bacteria removal from water and wastewater.
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Affiliation(s)
- Bindia Junejo
- National Centre of Excellence in Analytical Chemistry, University of Sindh Jamshoro, Sindh 76080, Pakistan
| | - Mujde Eryilmaz
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ankara University, Ankara 06100, Turkey
| | - Suna Sibel Rizvanoglu
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ankara University, Ankara 06100, Turkey
| | - Ismail Murat Palabiyik
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara 06100, Turkey
| | - Tania Ghumro
- National Centre of Excellence in Analytical Chemistry, University of Sindh Jamshoro, Sindh 76080, Pakistan
| | - Arfana Mallah
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway; M. A. Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan
| | - Amber R Solangi
- National Centre of Excellence in Analytical Chemistry, University of Sindh Jamshoro, Sindh 76080, Pakistan
| | - Syed Iqleem Hyder
- Department of Chemistry, Government College University, Hyderabad, Sindh, Pakistan
| | - Hassan Karimi Maleh
- School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave., Chengdu, China
| | - Elena Niculina Dragoi
- Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, 'Gheorghe Asachi' Technical University, Bld D. Mangeron no. 73, Iasi 700050, Romania E-mail:
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8
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Dialynaki D, Stavropoulou A, Laskou M, Alexandraki D. The essential liaison of two copper proteins: the Cu-sensing transcription factor Mac1 and the Cu/Zn superoxide dismutase Sod1 in Saccharomyces cerevisiae. Curr Genet 2023; 69:41-53. [PMID: 36456733 DOI: 10.1007/s00294-022-01258-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/30/2022] [Accepted: 11/07/2022] [Indexed: 12/04/2022]
Abstract
Although copper is an essential trace element for cell function and viability, its excess can lead to protein oxidation, DNA cleavage, and ultimate cell damage. Cells have established a variety of regulatory mechanisms to ensure copper ion homeostasis. In Saccharomyces cerevisiae, copper sensing and response to copper deficiency are regulated by the transcription factor Mac1. Our group has previously reported that in addition to copper, several chromatin proteins modulate Mac1 functionality. In this study, based on a synthetic growth deficiency phenotype, we showed that the Cu/Zn superoxide dismutase Sod1 plays an important role in Mac1 transcriptional activity, in unchallenged nutrient-rich growth conditions. Sod1 is a multipotent cytoplasmic and mitochondrial enzyme, whose main known function is to detoxify the cell from superoxide ions. It has been previously reported that Sod1 also enters the nucleus and affects the transcription of several genes, some of which are involved in copper homeostasis under Cu-depleted (Wood and Thiele in J Biol Chem 284:404-413, 2009) or only under specific oxidative stress conditions (Dong et al. Mol Cell Biol 33:4041-4050, 2013; Tsang et al. Nar Commun 8:3446, 2014). We have shown that Sod1 physically interacts with Mac1 transcription factor and is important for the transactivation as well as its DNA-binding activities. On the other hand, a constitutively active mutant of Mac1 is not affected functionally by the Sod1 ablation, pointing out that Sod1 contributes to the maintenance of the copper-unchelated state of Mac1. In conclusion, we showed that Sod1-Mac1 interaction is vital for Mac1 functionality, regardless of copper medium deficiency, in unchallenged growth conditions, and we suggest that Sod1 enzymatic activity may modify the redox state of the cysteine-rich motifs in the Mac1 DNA-binding and transactivation domains.
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Affiliation(s)
- Dimitra Dialynaki
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece
| | - Athanasia Stavropoulou
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece.,Computational Genomics Group, Biomedical Sciences Research Center "Alexander Fleming", 16672, Athens, Greece
| | - Maria Laskou
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece.,NYU Langone Health, NYU Grossman School of Medicine, 435 E 30th Street, Science Building 1305, New York, NY, 10016, USA
| | - Despina Alexandraki
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece. .,Institute of Molecular Biology & Biotechnology, Foundation for Research and Technology-Hellas, N. Plastira 100, 70013, Heraklion, Crete, Greece.
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9
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Fan C, Zhang D, Mo Q, Yuan J. Engineering Saccharomyces cerevisiae-based biosensors for copper detection. Microb Biotechnol 2022; 15:2854-2860. [PMID: 35829650 PMCID: PMC9618319 DOI: 10.1111/1751-7915.14105] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 12/02/2022] Open
Abstract
Heavy metals, that is Cu(II), are harmful to the environment. There is an increasing demand to develop inexpensive detection methods for heavy metals. Here, we developed a yeast biosensor with reduced‐noise and improved signal output for potential on‐site copper ion detection. The copper‐sensing circuit was achieved by employing a secondary genetic layer to control the galactose‐inducible (GAL) system in Saccharomyces cerevisiae. The reciprocal control of the Gal4 activator and Gal80 repressor under copper‐responsive promoters resulted in a low‐noise and sensitive yeast biosensor for copper ion detection. Furthermore, we developed a betaxanthin‐based colorimetric assay, as well as 2‐phenylethanol and styrene‐based olfactory outputs for the copper ion detection. Notably, our engineered yeast sensor confers a narrow range switch‐like behaviour, which can give a ‘yes/no’ response when coupled with a betaxanthin‐based visual phenotype. Taken together, we envision that the design principle established here might be applicable to develop other sensing systems for various chemical detections. A low‐noise yeast biosensor was developed for copper detection. The yeast biosensor confers a switch‐like behavior with a “yes/no” response. The olfactory outputs for copper detection were also developed.
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Affiliation(s)
- Cong Fan
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian, China
| | - Danli Zhang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian, China
| | - Qiwen Mo
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian, China
| | - Jifeng Yuan
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian, China
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10
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Küçükosman R, Isik Z, Özdemir S, Gonca S, Ocakoglu K, Dizge N. Synthesis of Rhombic Dodecahedral Cuprous Oxide Nanoparticles and Investigation of Biological Activity. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-022-00995-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Enhanced squalene production by modulation of pathways consuming squalene and its precursor. J Biosci Bioeng 2022; 134:1-6. [DOI: 10.1016/j.jbiosc.2022.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 03/31/2022] [Accepted: 04/10/2022] [Indexed: 11/21/2022]
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12
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Zhang X, Kebaara BW. Nonsense-mediated mRNA decay and metal ion homeostasis and detoxification in Saccharomyces cerevisiae. Biometals 2022; 35:1145-1156. [PMID: 36255607 PMCID: PMC9674712 DOI: 10.1007/s10534-022-00450-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 09/21/2022] [Indexed: 12/14/2022]
Abstract
The highly conserved Nonsense-mediated mRNA decay (NMD) pathway is a translation dependent mRNA degradation pathway. Although NMD is best known for its role in degrading mRNAs with premature termination codons (PTCs) generated during transcription, splicing, or damage to the mRNAs, NMD is now also recognized as a pathway with additional important functions. Notably, NMD precisely regulates protein coding natural mRNAs, hence controlling gene expression within several physiologically significant pathways. Such pathways affected by NMD include nutritional bio-metal homeostasis and metal ion detoxification, as well as crosstalk between these pathways. Here, we focus on the relationships between NMD and various metal homeostasis and detoxification pathways. We review the described role that the NMD pathway plays in magnesium, zinc, iron, and copper homeostasis, as well as cadmium detoxification.
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Affiliation(s)
- Xinyi Zhang
- grid.252890.40000 0001 2111 2894Department of Biology, Baylor University, One Bear Place #97388, Waco, TX 76798 USA
| | - Bessie W. Kebaara
- grid.252890.40000 0001 2111 2894Department of Biology, Baylor University, One Bear Place #97388, Waco, TX 76798 USA
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13
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Ozimek J, Pielichowski K. Recent Advances in Polyurethane/POSS Hybrids for Biomedical Applications. Molecules 2021; 27:molecules27010040. [PMID: 35011280 PMCID: PMC8746980 DOI: 10.3390/molecules27010040] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 11/16/2022] Open
Abstract
Advanced organic-inorganic materials-composites, nanocomposites, and hybrids with various compositions offer unique properties required for biomedical applications. One of the most promising inorganic (nano)additives are polyhedral oligomeric silsesquioxanes (POSS); their biocompatibility, non-toxicity, and phase separation ability that modifies the material porosity are fundamental properties required in modern biomedical applications. When incorporated, chemically or physically, into polyurethane matrices, they substantially change polymer properties, including mechanical properties, surface characteristics, and bioactivity. Hence, this review is dedicated to POSS-PU composites that have recently been developed for applications in the biomedical field. First, different modes of POSS incorporation into PU structure have been presented, then recent developments of PU/POSS hybrids as bio-active composites for scaffolds, cardiovascular stents, valves, and membranes, as well as in bio-imaging and cancer treatment, have been described. Finally, characterization and methods of modification routes of polyurethane-based materials with silsesquioxanes were presented.
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14
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Zhou P, Fang X, Xu N, Yao Z, Xie W, Ye L. Development of a Highly Efficient Copper-Inducible GAL Regulation System (CuIGR) in Saccharomyces cerevisiae. ACS Synth Biol 2021; 10:3435-3444. [PMID: 34874147 DOI: 10.1021/acssynbio.1c00378] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Dynamic regulation of gene expression to decouple growth and production has been proven to be effective for improving the biosynthetic efficiency of microbial cell factories. However, the number of efficient regulatory systems available for regulation of Saccharomyces cerevisiae is limited. In the present study, a novel copper-inducible gene expression system (CuIGR) composed of the copper-induced transcriptional activator Gal4 and the copper-inhibited repressor Gal80 was constructed in S. cerevisiae. When Gal80 was fused with a N-degron tag (K15), the resulting CuIGR4 system exhibited the most stringent regulation of gene expression driven by GAL1/2/7/10 promoters. As compared to the native Cu2+-inducible CUP1 promoter, the CuIGR4 system amplified the response to copper by as much as 2.7 folds, resulting in 72-fold induction of EGFP expression and a 33-fold change in lycopene production (3-100 mg/L) with addition of 20 μM copper. This newly developed copper-inducible system provides a powerful tool for gene expression control in S. cerevisiae, which is expected to be widely applicable in the regulation of yeast cell factories for enhanced biosynthesis of valuable products.
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Affiliation(s)
- Pingping Zhou
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, PR China
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, Jiangsu 225009, PR China
| | - Xin Fang
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, Jiangsu 225009, PR China
| | - Nannan Xu
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, Jiangsu 225009, PR China
| | - Zhen Yao
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Wenping Xie
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, PR China
- Zhejiang NHU Company Limited, Shaoxing 312521, PR China
| | - Lidan Ye
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, PR China
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15
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Lee JW, Ong TG, Samian MR, Teh AH, Watanabe N, Osada H, Ong EBB. Screening of selected ageing-related proteins that extend chronological life span in yeast Saccharomyces cerevisiae. Sci Rep 2021; 11:24148. [PMID: 34921163 PMCID: PMC8683414 DOI: 10.1038/s41598-021-03490-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 12/03/2021] [Indexed: 12/27/2022] Open
Abstract
Ageing-related proteins play various roles such as regulating cellular ageing, countering oxidative stress, and modulating signal transduction pathways amongst many others. Hundreds of ageing-related proteins have been identified, however the functions of most of these ageing-related proteins are not known. Here, we report the identification of proteins that extended yeast chronological life span (CLS) from a screen of ageing-related proteins. Three of the CLS-extending proteins, Ptc4, Zwf1, and Sme1, contributed to an overall higher survival percentage and shorter doubling time of yeast growth compared to the control. The CLS-extending proteins contributed to thermal and oxidative stress responses differently, suggesting different mechanisms of actions. The overexpression of Ptc4 or Zwf1 also promoted rapid cell proliferation during yeast growth, suggesting their involvement in cell division or growth pathways.
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Affiliation(s)
- Jee Whu Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
| | - Tee Gee Ong
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
| | - Mohammed Razip Samian
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
- School of Biological Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Aik-Hong Teh
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
- Centre for Chemical Biology, Universiti Sains Malaysia, 11900 Bayan Lepas, Penang, Malaysia
| | - Nobumoto Watanabe
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
- Bioprobe Application Research Unit, RIKEN Centre for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Hiroyuki Osada
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang
- Chemical Biology Research Group, RIKEN Centre for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Eugene Boon Beng Ong
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia, 11800 USM, Malaysia, Penang.
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16
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Singh S, Sahu RK, Sugathan A, Tomar RS. The H2A N-terminal tail is required to alleviate copper-induced stress in Saccharomyces cerevisiae. FEMS Yeast Res 2021; 21:6459723. [PMID: 34894216 DOI: 10.1093/femsyr/foab061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 12/09/2021] [Indexed: 11/13/2022] Open
Abstract
Histone tail residues drive many biological processes by regulating genome-wide transcription. Functions of histone H3 and H4 tail residues in stress-responsive gene transcriptional programs have been extensively studied. The H2A tail residues have been shown to regulate DNA damage repair and oxidative stress response, but the involvement of N-terminal tail of H2A (H2ANtT) in proteostasis regulation is unknown. The unfolded protein response pathway (UPR) is an essential mechanism adopted by cells to prevent protein toxicity in response to ER stress. The disturbance in ER can occur by various factors such as heat stress, redox imbalance, exposure to xenobiotics and metals. Copper is utilized as a cofactor by cellular enzymes, but excessive copper affects ER homeostasis. We found that cells lacking 1-20 residues of H2ANtT are intolerant to copper stress, owing to the accumulation of misfolded proteins in the mutant cells. H2A 1-20 truncation also reduces the physiological UPR, and copper exposure further aggravates this effect. Furthermore, the expression of a spliced version of HAC1 mRNA in H2A∆(1-20) cells, encoding the downstream transcription factor of UPR signalling, rescues their growth under copper stress. Altogether these results provide evidence that H2ANtT reduces copper-induced ER stress by regulating UPR signalling.
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Affiliation(s)
- Sakshi Singh
- Laboratory of Chromatin Biology, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Rd, Bhauri, Madhya Pradesh 462066, India
| | - Rakesh Kumar Sahu
- Laboratory of Chromatin Biology, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Rd, Bhauri, Madhya Pradesh 462066, India
| | - Anaswara Sugathan
- Laboratory of Chromatin Biology, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Rd, Bhauri, Madhya Pradesh 462066, India
| | - Raghuvir Singh Tomar
- Laboratory of Chromatin Biology, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Rd, Bhauri, Madhya Pradesh 462066, India
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17
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Guzman M, Arcos M, Dille J, Rousse C, Godet S, Malet L. Effect of the Concentration and the Type of Dispersant on the Synthesis of Copper Oxide Nanoparticles and Their Potential Antimicrobial Applications. ACS OMEGA 2021; 6:18576-18590. [PMID: 34337198 PMCID: PMC8319940 DOI: 10.1021/acsomega.1c00818] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 06/24/2021] [Indexed: 06/01/2023]
Abstract
The bactericidal properties of copper oxide nanoparticles have growing interest due to potential application in the medical area. The present research investigates the influence of sodium dodecyl sulfate (SDS) and poly(vinylpyrrolidone) (PVP) on the production of copper oxide nanoparticles prepared from copper sulfate (CuSO4) and sodium borohydride (NaBH4) solutions. Different analytical techniques were used to determine the crystal nature, mean size diameter, and surface morphology of the copper oxide nanoparticles. The X-ray diffraction (XRD) patterns showed formation of nanoparticles of cuprite (Cu2O) and tenorite (CuO) when PVP and SDS were added at the beginning of the reaction. In fact, when the Cu/PVP ratio was 1.62, Cu2O nanoparticles were obtained. In addition, nanoparticles of CuO were synthesized when the Cu/PVP ratios were 0.54 and 0.81. On the other hand, a mixture of copper oxides (CuO and Cu2O) and cuprite (Cu2O) was obtained when PVP (Cu/PVP = 0.81 and 1.62) and SDS (Cu/SDS = 0.90) were added 30 min after the beginning of the reaction. Transmission electron microscopy (TEM) images show agglomerated nanoparticles with a size distribution ranging from 2 to 60 nm, while individual particles have sizes between 4.1 ± 1.9 and 41.6 ± 12.8 nm. The Kirby-Bauer method for the determination of antibacterial activity shows that small CuO (4.1 ± 1.9 nm) and Cu2O (8.5 ± 5.3 nm) nanoparticles inhibit the growth of Escherichia coli, Staphylococcus aureus MRSA, S. aureus and Pseudomonas aeruginosa bacteria. The antibacterial test of cotton fabric impregnated with nanoparticles shows positive results. The determination of the optimal ratio of copper oxide nanoparticles per cm2 of fabric that are able to exhibit a good antibacterial activity is ongoing.
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Affiliation(s)
- Maribel Guzman
- Engineering
Department, Pontifical Catholic University
of Peru, Av. Universitaria 1801, Lima 32, Peru
| | - Mariella Arcos
- Sciences
Department, Pontifical Catholic University
of Peru, Av. Universitaria
1801, Lima 32, Peru
| | - Jean Dille
- 4MAT,
Université Libre de Bruxelles, CP 194/03, 50 Avenue Roosevelt, B-1050 Brussels, Belgium
| | - Céline Rousse
- LISM,
EA 4695, UFR Sciences Exactes et Naturelles, Université de
Reims Champagne-Ardenne, BP 1039, 51687 Reims cedex 2, France
| | - Stéphane Godet
- 4MAT,
Université Libre de Bruxelles, CP 194/03, 50 Avenue Roosevelt, B-1050 Brussels, Belgium
| | - Loïc Malet
- 4MAT,
Université Libre de Bruxelles, CP 194/03, 50 Avenue Roosevelt, B-1050 Brussels, Belgium
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18
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Molecular characterization of the COPT/Ctr-type copper transporter family under heavy metal stress in alfalfa. Int J Biol Macromol 2021; 181:644-652. [PMID: 33798576 DOI: 10.1016/j.ijbiomac.2021.03.173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 03/17/2021] [Accepted: 03/25/2021] [Indexed: 11/21/2022]
Abstract
In nature, heavy metals significantly affect crop growth and quality. Among various heavy metals, copper (Cu) is both essential and toxic to plants depending on the concentration and complex homeostatic networks. The Cu transporter family (COPT) plays important roles in Cu homeostasis, including absorption, transportation, and growth in plants; however, this gene family is still poorly understood in alfalfa (Medicago sativa L.). In this study, a total of 12 MsCOPTs were identified and characterized. Based on the conserved motif and phylogenetic analysis, MsCOPTs could be divided into four subgroups (A1, A2, A3, and B). Gene structure, chromosomal location, and synteny analyses of MsCOPTs showed that segmental and tandem duplications likely contributed to their evolution. Tissue-specific expression analysis of MsCOPT genes indicated diverse spatiotemporal expression patterns. Most MsCOPT genes had high transcription levels in roots and nodules, indicating that these genes may play vital roles in the absorption and transport of Cu through root. The complementary heterologous expression function of yeast once again indicates that root-specific COPT can supplement the growth of defective yeast strains on YPEG medium, suggesting that these genes are Cu transporters. In summary, for the first time, our research identified COPT family genes at the whole-genome level to provide guidance for effectively improving the problem of Cu deficiency in the grass-livestock chain and provide theoretical support for the subsequent development of grass and animal husbandry.
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19
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Robinson JR, Isikhuemhen OS, Anike FN. Fungal-Metal Interactions: A Review of Toxicity and Homeostasis. J Fungi (Basel) 2021; 7:225. [PMID: 33803838 PMCID: PMC8003315 DOI: 10.3390/jof7030225] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 12/18/2022] Open
Abstract
Metal nanoparticles used as antifungals have increased the occurrence of fungal-metal interactions. However, there is a lack of knowledge about how these interactions cause genomic and physiological changes, which can produce fungal superbugs. Despite interest in these interactions, there is limited understanding of resistance mechanisms in most fungi studied until now. We highlight the current knowledge of fungal homeostasis of zinc, copper, iron, manganese, and silver to comprehensively examine associated mechanisms of resistance. Such mechanisms have been widely studied in Saccharomyces cerevisiae, but limited reports exist in filamentous fungi, though they are frequently the subject of nanoparticle biosynthesis and targets of antifungal metals. In most cases, microarray analyses uncovered resistance mechanisms as a response to metal exposure. In yeast, metal resistance is mainly due to the down-regulation of metal ion importers, utilization of metallothionein and metallothionein-like structures, and ion sequestration to the vacuole. In contrast, metal resistance in filamentous fungi heavily relies upon cellular ion export. However, there are instances of resistance that utilized vacuole sequestration, ion metallothionein, and chelator binding, deleting a metal ion importer, and ion storage in hyphal cell walls. In general, resistance to zinc, copper, iron, and manganese is extensively reported in yeast and partially known in filamentous fungi; and silver resistance lacks comprehensive understanding in both.
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Affiliation(s)
| | - Omoanghe S. Isikhuemhen
- Department of Natural Resources and Environmental Design, North Carolina Agricultural and Technical State University, 1601 East Market Street, Greensboro, NC 27411, USA; (J.R.R.); (F.N.A.)
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20
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Obaid MA, Hellal Harbi K, Abd AN. Study the effect of antibacterial on the chemically prepared copper oxide. MATERIALS TODAY: PROCEEDINGS 2021; 47:6006-6010. [DOI: 10.1016/j.matpr.2021.04.554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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21
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Antsotegi-Uskola M, Markina-Iñarrairaegui A, Ugalde U. Copper Homeostasis in Aspergillus nidulans Involves Coordinated Transporter Function, Expression and Cellular Dynamics. Front Microbiol 2020; 11:555306. [PMID: 33281756 PMCID: PMC7705104 DOI: 10.3389/fmicb.2020.555306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 10/14/2020] [Indexed: 01/06/2023] Open
Abstract
Copper ion homeostasis involves a finely tuned and complex multi-level response system. This study expands on various aspects of the system in the model filamentous fungus Aspergillus nidulans. An RNA-seq screen in standard growth and copper toxicity conditions revealed expression changes in key copper response elements, providing an insight into their coordinated functions. The same study allowed for the deeper characterization of the two high-affinity copper transporters: AnCtrA and AnCtrC. In mild copper deficiency conditions, the null mutant of AnctrC resulted in secondary level copper limitation effects, while deletion of AnctrA resulted in primary level copper limitation effects under extreme copper scarcity conditions. Each transporter followed a characteristic expression and cellular localization pattern. Although both proteins partially localized at the plasma membrane, AnCtrC was visible at membranes that resembled the ER, whilst a substantial pool of AnCtrA accumulated in vesicular structures resembling endosomes. Altogether, our results support the view that AnCtrC plays a major role in covering the nutritional copper requirements and AnCtrA acts as a specific transporter for extreme copper deficiency scenarios.
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Affiliation(s)
- Martzel Antsotegi-Uskola
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country, San Sebastian, Spain
| | - Ane Markina-Iñarrairaegui
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country, San Sebastian, Spain
| | - Unai Ugalde
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country, San Sebastian, Spain
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22
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Petito G, de Curcio JS, Pereira M, Bailão AM, Paccez JD, Tristão GB, de Morais COB, de Souza MV, de Castro Moreira Santos A, Fontes W, Ricart CAO, de Almeida Soares CM. Metabolic Adaptation of Paracoccidioides brasiliensis in Response to in vitro Copper Deprivation. Front Microbiol 2020; 11:1834. [PMID: 32849434 PMCID: PMC7430155 DOI: 10.3389/fmicb.2020.01834] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/13/2020] [Indexed: 02/06/2023] Open
Abstract
Copper is an essential micronutrient for the performance of important biochemical processes such as respiration detoxification, and uptake of metals like iron. Studies have shown that copper deprivation is a strategy used by the host against pathogenic fungi such as Cryptoccocus neoformans and Candida albicans during growth and development of infections in the lungs and kidneys. Although there are some studies, little is known about the impact of copper deprivation in members of the Paracoccidioides genus. Therefore, using isobaric tag labeling (iTRAQ)-Based proteomic approach and LC-MS/MS, we analyzed the impact of in vitro copper deprivation in the metabolism of Paracoccidioides brasiliensis. One hundred and sixty-four (164) differentially abundant proteins were identified when yeast cells were deprived of copper, which affected cellular respiration and detoxification processes. Changes in cellular metabolism such as increased beta oxidation and cell wall remodeling were described.
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Affiliation(s)
- Guilherme Petito
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
- Programa de Pós-graduação em Genética e Biologia Molecular, Universidade Federal de Goiás, Goiânia, Brazil
| | - Juliana Santana de Curcio
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Maristela Pereira
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Alexandre Melo Bailão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Juliano Domiraci Paccez
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Gabriel Brum Tristão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Marcelo Valle de Souza
- Departamento de Biologia Celular, Instituto de Biologia, Universidade de Brasília, Brasília, Brazil
| | | | - Wagner Fontes
- Departamento de Biologia Celular, Instituto de Biologia, Universidade de Brasília, Brasília, Brazil
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23
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Adaptation to Industrial Stressors Through Genomic and Transcriptional Plasticity in a Bioethanol Producing Fission Yeast Isolate. G3-GENES GENOMES GENETICS 2020; 10:1375-1391. [PMID: 32086247 PMCID: PMC7144085 DOI: 10.1534/g3.119.400986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Schizosaccharomyces pombe is a model unicellular eukaryote with ties to the basic research, oenology and industrial biotechnology sectors. While most investigations into S. pombe cell biology utilize Leupold’s 972h- laboratory strain background, recent studies have described a wealth of genetic and phenotypic diversity within wild populations of S. pombe including stress resistance phenotypes which may be of interest to industry. Here we describe the genomic and transcriptomic characterization of Wilmar-P, an S. pombe isolate used for bioethanol production from sugarcane molasses at industrial scale. Novel sequences present in Wilmar-P but not in the laboratory S. pombe genome included multiple coding sequences with near-perfect nucleotide identity to Schizosaccharomyces octosporus sequences. Wilmar-P also contained a ∼100kb duplication in the right arm of chromosome III, a region harboring ght5+, the predominant hexose transporter encoding gene. Transcriptomic analysis of Wilmar-P grown in molasses revealed strong downregulation of core environmental stress response genes and upregulation of hexose transporters and drug efflux pumps compared to laboratory S. pombe. Finally, examination of the regulatory network of Scr1, which is involved in the regulation of several genes differentially expressed on molasses, revealed expanded binding of this transcription factor in Wilmar-P compared to laboratory S. pombe in the molasses condition. Together our results point to both genomic plasticity and transcriptomic adaptation as mechanisms driving phenotypic adaptation of Wilmar-P to the molasses environment and therefore adds to our understanding of genetic diversity within industrial fission yeast strains and the capacity of this strain for commercial scale bioethanol production.
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24
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Ryu H, Su D, Wilson‐Eisele NR, Zhao D, López‐Giráldez F, Hochstrasser M. The Ulp2 SUMO protease promotes transcription elongation through regulation of histone sumoylation. EMBO J 2019; 38:e102003. [PMID: 31313851 PMCID: PMC6694223 DOI: 10.15252/embj.2019102003] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/22/2019] [Accepted: 06/26/2019] [Indexed: 01/07/2023] Open
Abstract
Many eukaryotic proteins are regulated by modification with the ubiquitin-like protein small ubiquitin-like modifier (SUMO). This linkage is reversed by SUMO proteases, of which there are two in Saccharomyces cerevisiae, Ulp1 and Ulp2. SUMO-protein conjugation regulates transcription, but the roles of SUMO proteases in transcription remain unclear. We report that Ulp2 is recruited to transcriptionally active genes to control local polysumoylation. Mutant ulp2 cells show impaired association of RNA polymerase II (RNAPII) with, and diminished expression of, constitutively active genes and the inducible CUP1 gene. Ulp2 loss sensitizes cells to 6-azauracil, a hallmark of transcriptional elongation defects. We also describe a novel chromatin regulatory mechanism whereby histone-H2B ubiquitylation stimulates histone sumoylation, which in turn appears to inhibit nucleosome association of the Ctk1 kinase. Ctk1 phosphorylates serine-2 (S2) in the RNAPII C-terminal domain (CTD) and promotes transcript elongation. Removal of both ubiquitin and SUMO from histones is needed to overcome the impediment to S2 phosphorylation. These results suggest sequential ubiquitin-histone and SUMO-histone modifications recruit Ulp2, which removes polySUMO chains and promotes RNAPII transcription elongation.
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Affiliation(s)
- Hong‐Yeoul Ryu
- Department of Molecular Biophysics and BiochemistryYale UniversityNew HavenCTUSA
| | - Dan Su
- Department of Molecular Biophysics and BiochemistryYale UniversityNew HavenCTUSA
- Present address:
Protein Science Corp.MeridenCTUSA
| | - Nicole R Wilson‐Eisele
- Department of Molecular Biophysics and BiochemistryYale UniversityNew HavenCTUSA
- Present address:
Max Planck Institute of BiochemistryMartinsriedGermany
| | - Dejian Zhao
- Yale Center for Genome AnalysisYale UniversityNew HavenCTUSA
| | | | - Mark Hochstrasser
- Department of Molecular Biophysics and BiochemistryYale UniversityNew HavenCTUSA
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25
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Gómez-Gallego T, Benabdellah K, Merlos MA, Jiménez-Jiménez AM, Alcon C, Berthomieu P, Ferrol N. The Rhizophagus irregularis Genome Encodes Two CTR Copper Transporters That Mediate Cu Import Into the Cytosol and a CTR-Like Protein Likely Involved in Copper Tolerance. FRONTIERS IN PLANT SCIENCE 2019; 10:604. [PMID: 31156674 PMCID: PMC6531763 DOI: 10.3389/fpls.2019.00604] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/24/2019] [Indexed: 05/31/2023]
Abstract
Arbuscular mycorrhizal fungi increase fitness of their host plants under Cu deficient and toxic conditions. In this study, we have characterized two Cu transporters of the CTR family (RiCTR1 and RiCTR2) and a CTR-like protein (RiCTR3A) of Rhizophagus irregularis. Functional analyses in yeast revealed that RiCTR1 encodes a plasma membrane Cu transporter, RiCTR2 a vacuolar Cu transporter and RiCTR3A a plasma membrane protein involved in Cu tolerance. RiCTR1 was more highly expressed in the extraradical mycelia (ERM) and RiCTR2 in the intraradical mycelia (IRM). In the ERM, RiCTR1 expression was up-regulated by Cu deficiency and down-regulated by Cu toxicity. RiCTR2 expression increased only in the ERM grown under severe Cu-deficient conditions. These data suggest that RiCTR1 is involved in Cu uptake by the ERM and RiCTR2 in mobilization of vacuolar Cu stores. Cu deficiency decreased mycorrhizal colonization and arbuscule frequency, but increased RiCTR1 and RiCTR2 expression in the IRM, which suggest that the IRM has a high Cu demand. The two alternatively spliced products of RiCTR3, RiCTR3A and RiCTR3B, were more highly expressed in the ERM. Up-regulation of RiCTR3A by Cu toxicity and the yeast complementation assays suggest that RiCTR3A might function as a Cu receptor involved in Cu tolerance.
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Affiliation(s)
- Tamara Gómez-Gallego
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Karim Benabdellah
- Genomic Medicine Department, GENYO, Centre for Genomics and Oncological Research, Pfizer-University of Granada-Andalusian Regional Government, Granada, Spain
| | - Miguel A. Merlos
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Ana M. Jiménez-Jiménez
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Carine Alcon
- Biochimie et Physiologie Moléculaire des Plantes, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, Université de Montpellier, Montpellier SupAgro, Montpellier, France
| | - Pierre Berthomieu
- Biochimie et Physiologie Moléculaire des Plantes, Institut National de la Recherche Agronomique, Centre National de la Recherche Scientifique, Université de Montpellier, Montpellier SupAgro, Montpellier, France
| | - Nuria Ferrol
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
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26
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Ren F, Logeman BL, Zhang X, Liu Y, Thiele DJ, Yuan P. X-ray structures of the high-affinity copper transporter Ctr1. Nat Commun 2019; 10:1386. [PMID: 30918258 PMCID: PMC6437178 DOI: 10.1038/s41467-019-09376-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 03/06/2019] [Indexed: 02/02/2023] Open
Abstract
Copper (Cu) is an essential trace element for growth and development and abnormal Cu levels are associated with anemia, metabolic disease and cancer. Evolutionarily conserved from fungi to humans, the high-affinity Cu+ transporter Ctr1 is crucial for both dietary Cu uptake and peripheral distribution, yet the mechanisms for selective permeation of potentially toxic Cu+ ions across cell membranes are unknown. Here we present X-ray crystal structures of Ctr1 from Salmo salar in both Cu+-free and Cu+-bound states, revealing a homo-trimeric Cu+-selective ion channel-like architecture. Two layers of methionine triads form a selectivity filter, coordinating two bound Cu+ ions close to the extracellular entrance. These structures, together with Ctr1 functional characterization, provide a high resolution picture to understand Cu+ import across cellular membranes and suggest therapeutic opportunities for intervention in diseases characterized by inappropriate Cu accumulation. Copper (Cu) is an essential trace element for growth and development and the Cu+ transporter Ctr1 is crucial for both dietary Cu uptake and peripheral distribution. Here authors solve Cu+ -free and Cu+ -bound Ctr1 structures which adopt a homo-trimeric Cu+ -selective ion channel-like architecture
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Affiliation(s)
- Feifei Ren
- Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA.,Center for the Investigation of Membrane Excitability Diseases, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Brandon L Logeman
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, 27710, USA.,Department of Molecular and Cellular Biology, Harvard University, 52 Oxford Street, Cambridge, MA, 02138, USA
| | - Xiaohui Zhang
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Yongjian Liu
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Dennis J Thiele
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, 27710, USA.,Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA.,Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Peng Yuan
- Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA. .,Center for the Investigation of Membrane Excitability Diseases, Washington University School of Medicine, Saint Louis, MO, 63110, USA.
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27
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Jiao Y, Wan C, Zhang W, Bao W, Li J. Carbon Fibers Encapsulated with Nano-Copper: A Core‒Shell Structured Composite for Antibacterial and Electromagnetic Interference Shielding Applications. NANOMATERIALS 2019; 9:nano9030460. [PMID: 30893932 PMCID: PMC6474105 DOI: 10.3390/nano9030460] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/07/2019] [Accepted: 03/12/2019] [Indexed: 01/11/2023]
Abstract
A facile and scalable two-step method (including pyrolysis and magnetron sputtering) is created to prepare a core–shell structured composite consisting of cotton-derived carbon fibers (CDCFs) and nano-copper. Excellent hydrophobicity (water contact angle = 144°) and outstanding antibacterial activity against Escherichia coli and Staphylococcus aureus (antibacterial ratios of >92%) are achieved for the composite owing to the composition transformation from cellulose to carbon and nano-size effects as well as strong oxidizing ability of oxygen reactive radicals from interactions of nano-Cu with sulfhydryl groups of enzymes. Moreover, the core–shell material with high electrical conductivity induces the interfacial polarization loss and conduction loss, contributing to a high electromagnetic interference (EMI) shielding effectiveness of 29.3 dB. Consequently, this flexible and multi-purpose hybrid of nano-copper/CDCFs may be useful for numerous applications like self-cleaning wall cladding, EMI shielding layer and antibacterial products.
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Affiliation(s)
- Yue Jiao
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Caichao Wan
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Wenbo Zhang
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Wenhui Bao
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Jian Li
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
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28
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Mehta GD, Ball DA, Eriksson PR, Chereji RV, Clark DJ, McNally JG, Karpova TS. Single-Molecule Analysis Reveals Linked Cycles of RSC Chromatin Remodeling and Ace1p Transcription Factor Binding in Yeast. Mol Cell 2018; 72:875-887.e9. [PMID: 30318444 DOI: 10.1016/j.molcel.2018.09.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 08/08/2018] [Accepted: 09/07/2018] [Indexed: 12/12/2022]
Abstract
It is unknown how the dynamic binding of transcription factors (TFs) is molecularly linked to chromatin remodeling and transcription. Using single-molecule tracking (SMT), we show that the chromatin remodeler RSC speeds up the search process of the TF Ace1p for its response elements (REs) at the CUP1 promoter. We quantified smFISH mRNA data using a gene bursting model and demonstrated that RSC regulates transcription bursts of CUP1 only by modulating TF occupancy but does not affect initiation and elongation rates. We show by SMT that RSC binds to activated promoters transiently, and based on MNase-seq data, that RSC does not affect the nucleosomal occupancy at CUP1. Therefore, transient binding of Ace1p and rapid bursts of transcription at CUP1 may be dependent on short repetitive cycles of nucleosome mobilization. This type of regulation reduces the transcriptional noise and ensures a homogeneous response of the cell population to heavy metal stress.
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Affiliation(s)
- Gunjan D Mehta
- CCR/LRBGE Optical Microscopy Core, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - David A Ball
- CCR/LRBGE Optical Microscopy Core, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Peter R Eriksson
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute for Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Razvan V Chereji
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute for Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - David J Clark
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute for Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - James G McNally
- Institute for Soft Matter and Functional Materials, Helmholtz Center Berlin, Berlin 12489, Germany
| | - Tatiana S Karpova
- CCR/LRBGE Optical Microscopy Core, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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29
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Logeman BL, Thiele DJ. Reconstitution of a thermophilic Cu + importer in vitro reveals intrinsic high-affinity slow transport driving accumulation of an essential metal ion. J Biol Chem 2018; 293:15497-15512. [PMID: 30131336 PMCID: PMC6177576 DOI: 10.1074/jbc.ra118.004802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/09/2018] [Indexed: 01/01/2023] Open
Abstract
Acquisition of the trace element copper (Cu) is critical to drive essential eukaryotic processes such as oxidative phosphorylation, iron mobilization, peptide hormone biogenesis, and connective tissue maturation. The Ctr1/Ctr3 family of Cu importers, first discovered in fungi and conserved in mammals, are critical for Cu+ movement across the plasma membrane or mobilization from endosomal compartments. Whereas ablation of Ctr1 in mammals is embryonic lethal, and Ctr1 is critical for dietary Cu absorption, cardiac function, and systemic iron distribution, little is known about the intrinsic contribution of Ctr1 for Cu+ permeation through membranes or its mechanism of action. Here, we identify three members of a Cu+ importer family from the thermophilic fungus Chaetomium thermophilum: Ctr3a and Ctr3b, which function on the plasma membrane, and Ctr2, which likely functions in endosomal Cu mobilization. All three proteins drive Cu and isoelectronic silver (Ag) uptake in cells devoid of Cu+ importers. Transport activity depends on signature amino acid motifs that are conserved and essential for all Ctr1/3 transporters. Ctr3a is stable and amenable to purification and was incorporated into liposomes to reconstitute an in vitro Ag+ transport assay characterized by stopped-flow spectroscopy. Ctr3a has intrinsic high-affinity metal ion transport activity that closely reflects values determined in vivo, with slow turnover kinetics. Given structural models for mammalian Ctr1, Ctr3a likely functions as a low-efficiency Cu+ ion channel. The Ctr1/Ctr3 family may be tuned to import essential yet potentially toxic Cu+ ions at a slow rate to meet cellular needs, while minimizing labile intracellular Cu+ pools.
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Affiliation(s)
| | - Dennis J Thiele
- From the Departments of Pharmacology and Cancer Biology,
- Biochemistry, and
- Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina 27710
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30
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A copper transcription factor, AfMac1, regulates both iron and copper homeostasis in the opportunistic fungal pathogen Aspergillus fumigatus. Biochem J 2018; 475:2831-2845. [PMID: 30072493 DOI: 10.1042/bcj20180399] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/26/2018] [Accepted: 08/01/2018] [Indexed: 11/17/2022]
Abstract
Although iron and copper are co-ordinately regulated in living cells, the homeostatic effects of each of these metals on the other remain unknown. Here, we show the function of AfMac1, a transcriptional activator of the copper and iron regulons of Aspergillus fumigatus, on the interaction between iron and copper. In addition to the copper-specific AfMac1-binding motif 5'-TGTGCTCA-3' found in the promoter region of ctrC, the iron-specific AfMac1-binding motif 5'-AT(C/G)NN(A/T)T(A/C)-3' was identified in the iron regulon but not in the copper regulon by ChIP sequence analysis. Furthermore, mutation of the AfMac1-binding motif of sit1 eliminated AfMac1-mediated sit1 up-regulation. Interestingly, the regulation of gene expression in the iron regulon by AfMac1 was not affected by copper and vice versa AfMac1 localized to the nucleus under iron- or copper-depleted conditions, and AfMac1 was mostly detected in the cytoplasm under iron- or copper-replete conditions. Taken together, these results suggest that A. fumigatus independently regulates iron and copper homeostasis in a manner that involves AfMac1 and mutual interactions.
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31
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Wang H, Du H, Li H, Huang Y, Ding J, Liu C, Wang N, Lan H, Zhang S. Identification and functional characterization of the ZmCOPT copper transporter family in maize. PLoS One 2018; 13:e0199081. [PMID: 30036360 PMCID: PMC6056030 DOI: 10.1371/journal.pone.0199081] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 05/31/2018] [Indexed: 12/11/2022] Open
Abstract
Copper (Cu) is an essential micronutrient for plant growth and development; Cu homeostasis in plant is maintained by the important functions of Ctr/COPT-type Cu transporters. Although the COPT genes have been identified in Arabidopsis thaliana and rice, little is known about Cu transporters in maize. In this study, three-members of putative maize Cu transporters (ZmCOPT 1, 2 and 3) are identified. ZmCOPT genes have expression in all of the tested tissues, including roots, stems, leaves and flowers (male and female), and their expression levels vary responding to stress due to Cu-deficiency and excess. Functional complementation and overexpression together with Cu uptake measurements in ZmCOPTs-transformed ctr1⊿ctr2⊿mutant strain or the wild type strain of Saccharomyces cerevisiae show that the three ZmCOPT members possess the ability to be Cu transporters. Among these, ZmCOPT1 and ZmCOPT2 have high-affinity while ZmCOPT3 has low-affinity. In addition, ZmCOPT2 tend to specifically transport Cu (I) but no other bivalent metal ions.
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Affiliation(s)
- Hongling Wang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Hanmei Du
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Hongyou Li
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Ying Huang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Jianzhou Ding
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Chan Liu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Ning Wang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Hai Lan
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Suzhi Zhang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, China
- * E-mail:
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32
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Buß I, Hamacher A, Sarin N, Kassack MU, Kalayda GV. Relevance of copper transporter 1 and organic cation transporters 1-3 for oxaliplatin uptake and drug resistance in colorectal cancer cells. Metallomics 2018; 10:414-425. [PMID: 29417972 DOI: 10.1039/c7mt00334j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Oxaliplatin is a routinely used drug in the treatment of colorectal cancer. However, development of resistance is a major hurdle of the chemotherapy success. Defects in cellular accumulation represent a frequently reported feature of cells with acquired resistance to platinum drugs. Nevertheless, the mechanisms of oxaliplatin uptake and their role in oxaliplatin resistance remain poorly elucidated. The aim of this study was to investigate the relevance of copper transporter 1 (CTR1) and organic cation transporters 1-3 (OCT1-3) for oxaliplatin uptake and resistance to the drug in sensitive and oxaliplatin-resistant ileocecal colorectal adenocarcinoma cells. Co-incubation with copper(ii) sulfate, a CTR1 substrate, significantly decreased oxaliplatin accumulation but not cytotoxicity in both cell lines. Pre- as well as co-incubation with the OCT1 inhibitor atropine led to a significant reduction in oxaliplatin accumulation in sensitive but not in resistant cells. However, oxaliplatin cytotoxicity was also decreased in the presence of atropine in both cell lines. Cimetidine, an inhibitor of OCT2, induced a significant reduction in the cellular accumulation and potency of oxaliplatin in sensitive and resistant cells. An inhibitor of OCT3, decynium-22, had no influence on oxaliplatin accumulation and cytotoxicity in either cell line. No differences in the transporter expressions were observed between the cell lines, drug-treated or not, either at the mRNA or protein levels. A fluorescent oxaliplatin derivative CFDA-oxPt co-localized with CTR1, OCT1 and OCT2 in sensitive cells, but only with CTR1 and OCT2 in the resistant cell line. Our results suggest that oxaliplatin is transported into the cell by CTR1 in both cell lines. However, contribution of CTR1-mediated uptake to resistance seems unlikely. Uptake of oxaliplatin via OCT1 appears to take place in the sensitive but not in the resistant cell line underscoring the transporter relevance for oxaliplatin resistance. OCT2 is likely to be involved in the uptake of oxaliplatin to a similar extent in both cell lines suggesting no major contribution of this transporter to resistance. In contrast, OCT3 appears to be irrelevant for oxaliplatin transport into the cell and resistance.
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Affiliation(s)
- I Buß
- Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany.
| | - A Hamacher
- Institute of Pharmaceutical and Medicinal Chemistry, University of Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - N Sarin
- Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany.
| | - M U Kassack
- Institute of Pharmaceutical and Medicinal Chemistry, University of Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - G V Kalayda
- Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany.
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33
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Zanzen U, Bovenkamp-Langlois L, Klysubun W, Hormes J, Prange A. The interaction of copper ions with Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli: an X-ray absorption near-edge structure (XANES) spectroscopy study. Arch Microbiol 2017; 200:401-412. [PMID: 29181710 DOI: 10.1007/s00203-017-1454-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/13/2017] [Accepted: 11/14/2017] [Indexed: 01/26/2023]
Abstract
The antimicrobial properties of copper ions have been known for a long time. However, the exact mechanism of action of the transition metal on microorganisms has long been unclear. X-ray absorption near-edge structure (XANES) spectroscopy at the Cu K edge allows the determination of copper speciation in Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa that have been treated with Cu(II) and Cu(I) solutions. The death/inactivation of the bacteria was observed using plate counting and light microscopy. The Cu K-XANES spectra of the two Gram-negative bacteria are different than those of the Gram-positive strain. The results clearly show that the Cu+-S bond contributes to the antibacterial activity of copper, as in the case of silver. The detailed evaluation of the differentiated absorption spectra shows that Cu+ (not Cu2+) is the dominant ion that binds to the bacteria. Because Cu+ is not the most common copper ion, copper is not as effective an antibacterial agent as silver, whose common valency is actually + 1. Any reaction of copper with phosphorus from the bacteria can be excluded after the evaluation of the absorption spectra.
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Affiliation(s)
- Ulrike Zanzen
- Microbiology and Food Hygiene, Department of Food Sciences, Niederrhein University of Applied Sciences, Rheydter Strasse 277, 41065, Mönchengladbach, Germany.,Institute for Virology and Microbiology, University of Witten/Herdecke, 58448, Witten, Germany
| | - Lisa Bovenkamp-Langlois
- Center for Advanced Microstructures and Devices (CAMD), Louisiana State University, 6980 Jefferson Hwy, Baton Rouge, LA, 70806, USA
| | - Wantana Klysubun
- SIAM Photon Source, Synchrotron Light Research Institute, 111 University Avenue, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Josef Hormes
- Center for Advanced Microstructures and Devices (CAMD), Louisiana State University, 6980 Jefferson Hwy, Baton Rouge, LA, 70806, USA.,Institute of Physics, University of Bonn, 53115, Bonn, Germany
| | - Alexander Prange
- Microbiology and Food Hygiene, Department of Food Sciences, Niederrhein University of Applied Sciences, Rheydter Strasse 277, 41065, Mönchengladbach, Germany. .,Institute for Virology and Microbiology, University of Witten/Herdecke, 58448, Witten, Germany. .,Center for Advanced Microstructures and Devices (CAMD), Louisiana State University, 6980 Jefferson Hwy, Baton Rouge, LA, 70806, USA.
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34
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Rong-Mullins X, Winans MJ, Lee JB, Lonergan ZR, Pilolli VA, Weatherly LM, Carmenzind TW, Jiang L, Cumming JR, Oporto GS, Gallagher JEG. Proteomic and genetic analysis of the response of S. cerevisiae to soluble copper leads to improvement of the antimicrobial function of cellulosic copper nanoparticles. Metallomics 2017; 9:1304-1315. [PMID: 28869270 PMCID: PMC5741080 DOI: 10.1039/c7mt00147a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Copper (Cu) was used in antiquity to prevent waterborne and food diseases because, as a broad-spectrum antimicrobial agent, it generates reactive oxygen species, ROS. New technologies incorporating Cu into low-cost biodegradable nanomaterials built on cellulose, known as cellulosic cupric nanoparticles or c-CuNPs, present novel approaches to deliver Cu in a controlled manner to control microbial growth. We challenged strains of Saccharomyces cerevisiae with soluble Cu and c-CuNPs to evaluate the potential of c-CuNPs as antifungal agents. Cells exposed to c-CuNPs demonstrated greater sensitivity to Cu than cells exposed to soluble Cu, although Cu-resistant strains were more tolerant than Cu-sensitive strains of c-CuNP exposure. At the same level of growth inhibition, 157 μM c-CuNPs led to the same internal Cu levels as did 400 μM CuSO4, offering evidence for alternative mechanisms of toxicity, perhaps through β-arrestin dependent endocytosis, which was supported by flow cytometry and fluorescence microscopy of c-CuNPs distributed both on the cell surface and within the cytoplasm. Genes responsible for genetic variation in response to copper were mapped to the ZRT2 and the CUP1 loci. Through proteomic analyses, we found that the expression of other zinc (Zn) transporters increased in Cu-tolerant yeast compared to Cu-sensitive strains. Further, the addition of Zn at low levels increased the potency of c-CuNPs to inhibit even the most Cu-tolerant yeast. Through unbiased systems biological approaches, we identified Zn as a critical component of the yeast response to Cu and the addition of Zn increased the potency of the c-CuNPs.
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Affiliation(s)
| | - Matthew J Winans
- Department of Biology, West Virginia University, Morgantown, WV, USA.
| | - Justin B Lee
- Department of Biology, West Virginia University, Morgantown, WV, USA.
| | | | - Vincent A Pilolli
- Department of Biology, West Virginia University, Morgantown, WV, USA.
| | | | | | - Lihua Jiang
- Department of Genetics, Stanford University, Stanford University, Stanford, CA, USA
| | | | - Gloria S Oporto
- Division of Forestry and Natural Resources, West Virginia University, Morgantown, WV, USA
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35
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Functional characterization of the copper transcription factor AfMac1 from Aspergillus fumigatus. Biochem J 2017; 474:2365-2378. [PMID: 28515264 DOI: 10.1042/bcj20170191] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/14/2017] [Accepted: 05/16/2017] [Indexed: 01/20/2023]
Abstract
Although copper functions as a cofactor in many physiological processes, copper overload leads to harmful effects in living cells. Thus, copper homeostasis is tightly regulated. However, detailed copper metabolic pathways have not yet been identified in filamentous fungi. In this report, we investigated the copper transcription factor AfMac1 ( Aspergillus fumigatusMac1 homolog) and identified its regulatory mechanism in A. fumigatus AfMac1 has domains homologous to the DNA-binding and copper-binding domains of Mac1 from Saccharomyces cerevisiae, and AfMac1 efficiently complemented Mac1 in S. cerevisiae Expression of Afmac1 resulted in CTR1 up-regulation, and mutation of the DNA-binding domain of Afmac1 failed to activate CTR1 expression in S. cerevisiae The Afmac1 deletion strain of A. fumigatus failed to grow in copper-limited media, and its growth was restored by introducing ctrC We found that AfMac1 specifically bound to the promoter region of ctrC based on EMSA. The AfMac1-binding motif 5'-TGTGCTCA-3' was identified from the promoter region of ctrC, and the addition of mutant ctrC lacking the AfMac1-binding motif failed to up-regulate ctrC in A. fumigatus Furthermore, deletion of Afmac1 significantly reduced strain virulence and activated conidial killing activity by neutrophils and macrophages. Taken together, these results suggest that AfMac1 is a copper transcription factor that regulates cellular copper homeostasis in A. fumigatus.
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36
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Antsotegi-Uskola M, Markina-Iñarrairaegui A, Ugalde U. Copper Resistance in Aspergillus nidulans Relies on the P I-Type ATPase CrpA, Regulated by the Transcription Factor AceA. Front Microbiol 2017; 8:912. [PMID: 28611736 PMCID: PMC5447758 DOI: 10.3389/fmicb.2017.00912] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 05/04/2017] [Indexed: 01/17/2023] Open
Abstract
Copper homeostasis has been extensively studied in mammals, bacteria, and yeast, but it has not been well-documented in filamentous fungi. In this report, we investigated the basis of copper tolerance in the model fungus Aspergillus nidulans. Three genes involved in copper homeostasis have been characterized. First, crpA the A. nidulans ortholog of Candida albicans CaCRP1 gene encoding a PI-type ATPase was identified. The phenotype of crpA deletion led to a severe sensitivity to Cu+2 toxicity and a characteristic morphological growth defect in the presence of high copper concentration. CrpA displayed some promiscuity regarding metal species response. The expression pattern of crpA showed an initial strong elevation of mRNA and a low continuous gene expression in response to long term toxic copper levels. Coinciding with maximum protein expression level, CrpA was localized close to the cellular surface, however protein distribution across diverse organelles suggests a complex regulated trafficking process. Secondly, aceA gene, encoding a transcription factor was identified and deleted, resulting in an even more extreme copper sensitivity than the ΔcrpA mutant. Protein expression assays corroborated that AceA was necessary for metal inducible expression of CrpA, but not CrdA, a putative metallothionein the function of which has yet to be elucidated.
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Affiliation(s)
- Martzel Antsotegi-Uskola
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque CountrySan Sebastian, Spain
| | - Ane Markina-Iñarrairaegui
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque CountrySan Sebastian, Spain
| | - Unai Ugalde
- Microbial Biochemistry Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of the Basque CountrySan Sebastian, Spain
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37
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Cadiou JL, Pichat S, Bondanese VP, Soulard A, Fujii T, Albarède F, Oger P. Copper transporters are responsible for copper isotopic fractionation in eukaryotic cells. Sci Rep 2017; 7:44533. [PMID: 28303916 PMCID: PMC5356015 DOI: 10.1038/srep44533] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 02/06/2017] [Indexed: 12/14/2022] Open
Abstract
Copper isotopic composition is altered in cancerous compared to healthy tissues. However, the rationale for this difference is yet unknown. As a model of Cu isotopic fractionation, we monitored Cu uptake in Saccharomyces cerevisiae, whose Cu import is similar to human. Wild type cells are enriched in 63Cu relative to 65Cu. Likewise, 63Cu isotope enrichment in cells without high-affinity Cu transporters is of slightly lower magnitude. In cells with compromised Cu reductase activity, however, no isotope fractionation is observed and when Cu is provided solely in reduced form for this strain, copper is enriched in 63Cu like in the case of the wild type. Our results demonstrate that Cu isotope fractionation is generated by membrane importers and that its amplitude is modulated by Cu reduction. Based on ab initio calculations, we propose that the fractionation may be due to Cu binding with sulfur-rich amino acids: methionine and cysteine. In hepatocellular carcinoma (HCC), lower expression of the STEAP3 copper reductase and heavy Cu isotope enrichment have been reported for the tumor mass, relative to the surrounding tissue. Our study suggests that copper isotope fractionation observed in HCC could be due to lower reductase activity in the tumor.
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Affiliation(s)
- Jean-Loup Cadiou
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5276, Lyon, France
| | - Sylvain Pichat
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5276, Lyon, France
| | - Victor P. Bondanese
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5276, Lyon, France
| | - Alexandre Soulard
- Univ Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, CNRS, UMR5240, Villeurbanne, France
| | - Toshiyuki Fujii
- Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Francis Albarède
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5276, Lyon, France
| | - Philippe Oger
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5276, Lyon, France
- Univ Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, CNRS, UMR5240, Villeurbanne, France
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38
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Kusuya Y, Hagiwara D, Sakai K, Yaguchi T, Gonoi T, Takahashi H. Transcription factor Afmac1 controls copper import machinery in Aspergillus fumigatus. Curr Genet 2017; 63:777-789. [PMID: 28215034 DOI: 10.1007/s00294-017-0681-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/30/2017] [Accepted: 01/30/2017] [Indexed: 12/11/2022]
Abstract
Copper (Cu) is an essential metal for all living organisms, although it is toxic in excess. Filamentous fungus must acquire copper from its environment for growth. Despite its essentiality for growth, the mechanisms that maintain copper homeostasis are not fully understood in filamentous fungus. To gain insights into copper homeostasis, we investigated the roles of a copper transcription factor Afmac1 in the life-threatening fungus Aspergillus fumigatus, a homolog of the yeast MAC1. We observed that the Afmac1 deletion mutant exhibited not only significantly slower growth, but also incomplete conidiation including a short chain of conidia and defective melanin. Moreover, the expressions of the copper transporters, ctrA1, ctrA2, and ctrC, and metalloreductases, Afu8g01310 and fre7, were repressed in ∆Afmac1 cells, while those expressions were induced under copper depletion conditions in wild-type. The expressions of pksP and wetA, which are, respectively, involved in biosynthesis of conidia-specific melanin and the late stage of conidiogenesis, were decreased in the ∆Afmac1 strain under minimal media condition. Taken together, these results indicate that copper acquisition through AfMac1 functions in growth as well as conidiation.
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Affiliation(s)
- Yoko Kusuya
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Daisuke Hagiwara
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Kanae Sakai
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Takashi Yaguchi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Tohru Gonoi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Hiroki Takahashi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Chiba, Japan.
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Rezaie AB, Montazer M. Amidohydroxylated polyester with biophotoactivity along with retarding alkali hydrolysis throughin situsynthesis of Cu/Cu2O nanoparticles using diethanolamine. J Appl Polym Sci 2017. [DOI: 10.1002/app.44856] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ali Bashiri Rezaie
- Department of Textile Engineering; Amirkabir University of Technology, Functional Fibrous Structures and Environmental Enhancement (FFSEE); Tehran Iran
| | - Majid Montazer
- Department of Textile Engineering; Amirkabir University of Technology, Functional Fibrous Structures and Environmental Enhancement (FFSEE); Tehran Iran
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Kasavi C, Eraslan S, Oner ET, Kirdar B. An integrative analysis of transcriptomic response of ethanol tolerant strains to ethanol in Saccharomyces cerevisiae. MOLECULAR BIOSYSTEMS 2016; 12:464-76. [PMID: 26661334 DOI: 10.1039/c5mb00622h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The accumulation of ethanol is one of the main environmental stresses that Saccharomyces cerevisiae cells are exposed to in industrial alcoholic beverage and bioethanol production processes. Despite the known impacts of ethanol, the molecular mechanisms underlying ethanol tolerance are still not fully understood. Novel gene targets leading to ethanol tolerance were previously identified via a network approach and the investigations of the deletions of these genes resulted in the improved ethanol tolerance of pmt7Δ/pmt7Δ and yhl042wΔ/yhl042wΔ strains. In the present study, an integrative system based approach was used to investigate the global transcriptional changes in these two ethanol tolerant strains in response to ethanol and hence to elucidate the mechanisms leading to the observed tolerant phenotypes. In addition to strain specific biological processes, a number of common and already reported biological processes were found to be affected in the reference and both ethanol tolerant strains. However, the integrative analysis of the transcriptome with the transcriptional regulatory network and the ethanol tolerance network revealed that each ethanol tolerant strain had a specific organization of the transcriptomic response. Transcription factors around which most important changes occur were determined and active subnetworks in response to ethanol and functional clusters were identified in all strains.
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Affiliation(s)
- Ceyda Kasavi
- Department of Chemical Engineering, Boğaziçi University, Istanbul, Turkey.
| | - Serpil Eraslan
- Department of Chemical Engineering, Boğaziçi University, Istanbul, Turkey.
| | - Ebru Toksoy Oner
- Department of Bioengineering, Marmara University, Istanbul, Turkey
| | - Betul Kirdar
- Department of Chemical Engineering, Boğaziçi University, Istanbul, Turkey.
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Calvano CD, Picca RA, Bonerba E, Tantillo G, Cioffi N, Palmisano F. MALDI-TOF mass spectrometry analysis of proteins and lipids in Escherichia coli exposed to copper ions and nanoparticles. JOURNAL OF MASS SPECTROMETRY : JMS 2016; 51:828-840. [PMID: 27476478 DOI: 10.1002/jms.3823] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 07/16/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
Escherichia coli (E. coli) is one of the most important foodborne pathogens to the food industry responsible for diseases as bloody diarrhea, hemorrhagic colitis and life-threatening hemolytic-uremic syndrome. For controlling and eliminating E. coli, metal nano-antimicrobials (NAMs) are frequently used as bioactive systems for applications in food treatments. Most NAMs provide controlled release of metal ions, eventually slowing down or completely inhibiting the growth of undesired microorganisms. Nonetheless, their antimicrobial action is not totally unraveled and is strongly dependent on metal properties and environmental conditions. In this work, we propose the use of matrix-assisted laser desorption ionization time-of-flight (MALDI TOF) mass spectrometry as a powerful tool for direct, time efficient, plausible identification of the cell membrane damage in bacterial strains exposed to copper-based antimicrobial agents, such as soluble salts (chosen as simplified AM material) and copper nanoparticles. E. coli ATCC 25922 strain was selected as 'training bacterium' to set up some critical experimental parameters (i.e. cell concentration, selection of the MALDI matrix, optimal solvent composition, sample preparation method) for the MS analyses. The resulting procedure was then used to attain both protein and lipid fingerprints from E. coli after exposure to different loadings of Cu salts and NPs. Interestingly, bacteria exposed to copper showed over-expression of copper binding proteins and degradation of lipids when treated with soluble salt. These findings were completed with other investigations, such as microbiological experiments. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- C D Calvano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
| | - R A Picca
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
| | - E Bonerba
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Strada provinciale per Casamassima Km 3, 70100, Valenzano (BA), Italy
| | - G Tantillo
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Strada provinciale per Casamassima Km 3, 70100, Valenzano (BA), Italy
| | - N Cioffi
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
| | - F Palmisano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, Bari, 70126, Italy
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Organelle acidification negatively regulates vacuole membrane fusion in vivo. Sci Rep 2016; 6:29045. [PMID: 27363625 PMCID: PMC4929563 DOI: 10.1038/srep29045] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 06/10/2016] [Indexed: 12/13/2022] Open
Abstract
The V-ATPase is a proton pump consisting of a membrane-integral V0 sector and a peripheral V1 sector, which carries the ATPase activity. In vitro studies of yeast vacuole fusion and evidence from worms, flies, zebrafish and mice suggested that V0 interacts with the SNARE machinery for membrane fusion, that it promotes the induction of hemifusion and that this activity requires physical presence of V0 rather than its proton pump activity. A recent in vivo study in yeast has challenged these interpretations, concluding that fusion required solely lumenal acidification but not the V0 sector itself. Here, we identify the reasons for this discrepancy and reconcile it. We find that acute pharmacological or physiological inhibition of V-ATPase pump activity de-acidifies the vacuole lumen in living yeast cells within minutes. Time-lapse microscopy revealed that de-acidification induces vacuole fusion rather than inhibiting it. Cells expressing mutated V0 subunits that maintain vacuolar acidity were blocked in this fusion. Thus, proton pump activity of the V-ATPase negatively regulates vacuole fusion in vivo. Vacuole fusion in vivo does, however, require physical presence of a fusion-competent V0 sector.
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Balakumaran PA, Förster J, Zimmermann M, Charumathi J, Schmitz A, Czarnotta E, Lehnen M, Sudarsan S, Ebert BE, Blank LM, Meenakshisundaram S. The trade-off of availability and growth inhibition through copper for the production of copper-dependent enzymes by Pichia pastoris. BMC Biotechnol 2016; 16:20. [PMID: 26897180 PMCID: PMC4761204 DOI: 10.1186/s12896-016-0251-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 02/11/2016] [Indexed: 01/28/2023] Open
Abstract
Background Copper is an essential chemical element for life as it is a part of prosthetic groups of enzymes including super oxide dismutase and cytochrome c oxidase; however, it is also toxic at high concentrations. Here, we present the trade-off of copper availability and growth inhibition of a common host used for copper-dependent protein production, Pichia pastoris. Results At copper concentrations ranging from 0.1 mM (6.35 mg/L) to 2 mM (127 mg/L), growth rates of 0.25 h−1 to 0.16 h−1 were observed with copper uptake of as high as 20 mgcopper/gCDW. The intracellular copper content was estimated by subtracting the copper adsorbed on the cell wall from the total copper concentration in the biomass. Higher copper concentrations led to stronger cell growth retardation and, at 10 mM (635 mg/L) and above, to growth inhibition. To test the determined copper concentration range for optimal recombinant protein production, a laccase gene from Aspergillus clavatus [EMBL: EAW07265.1] was cloned under the control of the constitutive glyceraldehyde-3-phosphate (GAP) dehydrogenase promoter for expression in P. pastoris. Notably, in the presence of copper, laccase expression improved the specific growth rate of P. pastoris. Although copper concentrations of 0.1 mM and 0.2 mM augmented laccase expression 4 times up to 3 U/mL compared to the control (0.75 U/mL), while higher copper concentrations resulted in reduced laccase production. An intracellular copper content between 1 and 2 mgcopper/gCDW was sufficient for increased laccase activity. The physiology of the yeast could be excluded as a reason for the stop of laccase production at moderate copper concentrations as no flux redistribution could be observed by 13C-metabolic flux analysis. Conclusion Copper and its pivotal role to sustain cellular functions is noteworthy. However, knowledge on its cellular accumulation, availability and distribution for recombinant protein production is limited. This study attempts to address one such challenge, which revealed the fact that intracellular copper accumulation influenced laccase production and should be considered for high protein expression of copper-dependent enzymes when using P. pastoris. The results are discussed in the context of P. pastoris as a general host for copper -dependent enzyme production. Electronic supplementary material The online version of this article (doi:10.1186/s12896-016-0251-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Jan Förster
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Martin Zimmermann
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Jayachandran Charumathi
- Centre for Biotechnology, Anna University, Sardar Patel Road, Guindy, Chennai, 600025, India.
| | - Andreas Schmitz
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Eik Czarnotta
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Mathias Lehnen
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Suresh Sudarsan
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Birgitta E Ebert
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Lars Mathias Blank
- iAMB - Institute of Applied Microbiology, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
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Liu P, Sun L, Sun Y, Shang F, Yan G. Decreased fluidity of cell membranes causes a metal ion deficiency in recombinant Saccharomyces cerevisiae producing carotenoids. J Ind Microbiol Biotechnol 2016; 43:525-35. [PMID: 26749524 DOI: 10.1007/s10295-015-1728-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 12/24/2015] [Indexed: 01/07/2023]
Abstract
The genome-wide transcriptional responses of S. cerevisiae to heterologous carotenoid biosynthesis were investigated using DNA microarray analysis. The results show that the genes involved in metal ion transport were specifically up-regulated in the recombinant strain, and metal ions, including Cu(2+), Fe(2+), Mn(2+), and Mg(2+), were deficient in the recombinant strain compared to the ion content of the parent strain. The decrease in metal ions was ascribed to a decrease in cell membrane (CM) fluidity caused by lower levels of unsaturated fatty acids and ergosterol. This was confirmed by the observation that metal ion levels were restored when CM fluidity was increased by supplying linoleic acid. In addition, a 24.3 % increase in the β-carotene concentration was observed. Collectively, our results suggest that heterologous production of carotenoids in S. cerevisiae can induce cellular stress by rigidifying the CM, which can lead to a deficiency in metal ions. Due to the importance of CM fluidity in cellular physiology, maintaining normal CM fluidity might be a potential approach to improving carotenoid production in genetically engineered S. cerevisiae.
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Affiliation(s)
- Peitong Liu
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, People's Republic of China
| | - Liang Sun
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, People's Republic of China
| | - Yuxia Sun
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, People's Republic of China
| | - Fei Shang
- College of Biology Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Guoliang Yan
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, People's Republic of China.
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Jia B, Liu X, Zhan J, Li J, Huang W. The Effect of Proanthocyanidins on Growth and Alcoholic Fermentation of Wine Yeast under Copper Stress. J Food Sci 2015; 80:M1319-24. [PMID: 25943145 DOI: 10.1111/1750-3841.12897] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 04/03/2015] [Indexed: 11/28/2022]
Abstract
Proanthocyanidins (PAs) derived from the grape skin, as well as from grape seeds, grape stems, are an important group of polyphenols in wine. The aim of this study was to understand the effect of PAs (0.1, 1.0 g/L) on growth and alcoholic fermentation of 2 strains of Saccharomyces cerevisiae (commercial strain FREDDO and newly selected strain BH8) during copper-stress fermentation, using a simple model fermentation system. Our results showed that both PAs and Cu(2+) could pose significant inhibition effects on the growth of yeast cells, CO2 release, sugar consumption, and ethanol production during the initial phase of the fermentation. Compared to PAs, Cu(2+) performed more obvious inhibition on the yeast growth and fermentation. However, adding 1.0 g/L PAs increased in the vitality and metabolism activity of yeast cells at the mid-exponential phase of fermentation in the mediums with no copper and 0.1 mM Cu(2+) added, shortened the period of wine fermentation, and decreased the copper residues. It indicated that PAs could improve the ability of wine yeast to resist detrimental effects under copper-stress fermentation condition, maintaining cells metabolic activity, and fermentation could be controlled by manipulating PAs supplementation.
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Affiliation(s)
- Bo Jia
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural Univ, Beijing, 100083, P.R. China
| | - Xingyan Liu
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural Univ, Beijing, 100083, P.R. China.,College of Food Science, Sichuan Agricultural Univ, Sichuan Ya'an, 625000, China
| | - Jicheng Zhan
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural Univ, Beijing, 100083, P.R. China
| | - Jingyuan Li
- College of Food Science and Engineering, Qingdao Agricultural Univ, Qingdao, China
| | - Weidong Huang
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Viticulture and Enology, China Agricultural Univ, Beijing, 100083, P.R. China
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Allensworth JL, Evans MK, Bertucci F, Aldrich AJ, Festa RA, Finetti P, Ueno NT, Safi R, McDonnell DP, Thiele DJ, Van Laere S, Devi GR. Disulfiram (DSF) acts as a copper ionophore to induce copper-dependent oxidative stress and mediate anti-tumor efficacy in inflammatory breast cancer. Mol Oncol 2015; 9:1155-68. [PMID: 25769405 DOI: 10.1016/j.molonc.2015.02.007] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 02/11/2015] [Accepted: 02/12/2015] [Indexed: 12/20/2022] Open
Abstract
Cancer cells often have increased levels of reactive oxygen species (ROS); however, acquisition of redox adaptive mechanisms allows for evasion of ROS-mediated death. Inflammatory breast cancer (IBC) is a distinct, advanced BC subtype characterized by high rates of residual disease and recurrence despite advances in multimodality treatment. Using a cellular model of IBC, we identified an oxidative stress response (OSR) signature in surviving IBC cells after administration of an acute dose of an ROS inducer. Metagene analysis of patient samples revealed significantly higher OSR scores in IBC tumor samples compared to normal or non-IBC tissues, which may contribute to the poor response of IBC tumors to common treatment strategies, which often rely heavily on ROS induction. To combat this adaptation, we utilized a potent redox modulator, the FDA-approved small molecule Disulfiram (DSF), alone and in combination with copper. DSF forms a complex with copper (DSF-Cu) increasing intracellular copper concentration both in vitro and in vivo, bypassing the need for membrane transporters. DSF-Cu antagonized NFκB signaling, aldehyde dehydrogenase activity and antioxidant levels, inducing oxidative stress-mediated apoptosis in multiple IBC cellular models. In vivo, DSF-Cu significantly inhibited tumor growth without significant toxicity, causing apoptosis only in tumor cells. These results indicate that IBC tumors are highly redox adapted, which may render them resistant to ROS-inducing therapies. DSF, through redox modulation, may be a useful approach to enhance chemo- and/or radio-sensitivity for advanced BC subtypes where therapeutic resistance is an impediment to durable responses to current standard of care.
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Affiliation(s)
- Jennifer L Allensworth
- Department of Surgery, Duke University Medical Center, Durham, NC, USA; Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Myron K Evans
- Department of Surgery, Duke University Medical Center, Durham, NC, USA; Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - François Bertucci
- Department of Medical Oncology and Molecular Oncology, Institut Paoli-Calmettes, Marseille, France
| | - Amy J Aldrich
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Richard A Festa
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Pascal Finetti
- Department of Medical Oncology and Molecular Oncology, Institut Paoli-Calmettes, Marseille, France
| | - Naoto T Ueno
- Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, USA
| | - Rachid Safi
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Donald P McDonnell
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA; Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Dennis J Thiele
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Steven Van Laere
- Translational Cancer Research Unit, Oncology Center, General Hospital Sint-Augustinus, Antwerp, Wilrijk, Belgium
| | - Gayathri R Devi
- Department of Surgery, Duke University Medical Center, Durham, NC, USA; Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA; Department of Pathology, Duke University Medical Center, Durham, NC, USA.
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Sedighi A, Montazer M, Samadi N. Synthesis of nano Cu2O on cotton: Morphological, physical, biological and optical sensing characterizations. Carbohydr Polym 2014; 110:489-98. [DOI: 10.1016/j.carbpol.2014.04.030] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Revised: 03/09/2014] [Accepted: 04/07/2014] [Indexed: 11/16/2022]
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Sun XH, Yu G, Li JT, Jia P, Zhang JC, Jia CG, Zhang YH, Pan HY. A heavy metal-associated protein (AcHMA1) from the halophyte, Atriplex canescens (Pursh) Nutt., confers tolerance to iron and other abiotic stresses when expressed in Saccharomyces cerevisiae. Int J Mol Sci 2014; 15:14891-906. [PMID: 25153638 PMCID: PMC4159888 DOI: 10.3390/ijms150814891] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/15/2014] [Accepted: 08/18/2014] [Indexed: 11/16/2022] Open
Abstract
Many heavy metals are essential for metabolic processes, but are toxic at elevated levels. Metal tolerance proteins provide resistance to this toxicity. In this study, we identified and characterized a heavy metal-associated protein, AcHMA1, from the halophyte, Atriplex canescens. Sequence analysis has revealed that AcHMA1 contains two heavy metal binding domains. Treatments with metals (Fe, Cu, Ni, Cd or Pb), PEG6000 and NaHCO3 highly induced AcHMA1 expression in A. canescens, whereas NaCl and low temperature decreased its expression. The role of AcHMA1 in metal stress tolerance was examined using a yeast expression system. Expression of the AcHMA1 gene significantly increased the ability of yeast cells to adapt to and recover from exposure to excess iron. AcHMA1 expression also provided salt, alkaline, osmotic and oxidant stress tolerance in yeast cells. Finally, subcellular localization of an AcHMA1/GFP fusion protein expressed in tobacco cells showed that AcHMA1 was localized in the plasma membrane. Thus, our results suggest that AcHMA1 encodes a membrane-localized metal tolerance protein that mediates the detoxification of iron in eukaryotes. Furthermore, AcHMA1 also participates in the response to abiotic stress.
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Affiliation(s)
- Xin-Hua Sun
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Gang Yu
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Jing-Tao Li
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Pan Jia
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Ji-Chao Zhang
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Cheng-Guo Jia
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Yan-Hua Zhang
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Hong-Yu Pan
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
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Martins V, Bassil E, Hanana M, Blumwald E, Gerós H. Copper homeostasis in grapevine: functional characterization of the Vitis vinifera copper transporter 1. PLANTA 2014; 240:91-101. [PMID: 24691572 DOI: 10.1007/s00425-014-2067-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 03/13/2014] [Indexed: 06/03/2023]
Abstract
MAIN CONCLUSION The Vitis vinifera copper transporter 1 is capable of self-interaction and mediates intracellular copper transport. An understanding of copper homeostasis in grapevine (Vitis vinifera L.) is particularly relevant to viticulture in which copper-based fungicides are intensively used. In the present study, the Vitis vinifera copper transporter 1 (VvCTr1), belonging to the Ctr family of copper transporters, was cloned and functionally characterized. Amino acid sequence analysis showed that VvCTr1 monomers are small peptides composed of 148 amino acids with 3 transmembrane domains and several amino acid residues typical of Ctr transporters. Bimolecular fluorescence complementation (BiFC) demonstrated that Ctr monomers are self-interacting and subcellular localization studies revealed that VvCTr1 is mobilized via the trans-Golgi network, through the pre-vacuolar compartment and located to the vacuolar membrane. The heterologous expression of VvCTr1 in a yeast strain lacking all Ctr transporters fully rescued the phenotype, while a deficient complementation was observed in a strain lacking only plasma membrane-bound Ctrs. Given the common subcellular localization of VvCTr1 and AtCOPT5 and the highest amino acid sequence similarity in comparison to the remaining AtCOPT proteins, Arabidopsis copt5 plants were stably transformed with VvCTr1. The impairment in root growth observed in copt5 seedlings in copper-deficient conditions was fully rescued by VvCTr1, further supporting its involvement in intracellular copper transport. Expression studies in V. vinifera showed that VvCTr1 is mostly expressed in the root system, but transcripts were also present in leaves and stems. The functional characterization of VvCTr-mediated copper transport provides the first step towards understanding the physiological and molecular responses of grapevines to copper-based fungicides.
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Affiliation(s)
- Viviana Martins
- Centro de Investigação e de Tecnologias Agro-Ambientais e Biológicas (CITAB), Vila Real, Portugal
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Ding C, Hu G, Jung WH, Kronstad JW. Essential Metals in Cryptococcus neoformans: Acquisition and Regulation. CURRENT FUNGAL INFECTION REPORTS 2014. [DOI: 10.1007/s12281-014-0180-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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