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Root transcriptome reveals efficient cell signaling and energy conservation key to aluminum toxicity tolerance in acidic soil adapted rice genotype. Sci Rep 2020; 10:4580. [PMID: 32165659 PMCID: PMC7067865 DOI: 10.1038/s41598-020-61305-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 02/25/2020] [Indexed: 11/24/2022] Open
Abstract
Aluminium (Al) toxicity is the single most important contributing factor constraining crop productivity in acidic soils. Hydroponics based screening of three rice genotypes, a tolerant (ARR09, AR), a susceptible (IR 1552, IR) and an acid soil adapted landrace (Theruvii, TH) revealed that AR accumulates less Al and shows minimum decrease in shoot and root biomass under Al toxicity conditions when compared with IR. Transcriptome data generated on roots (grown in presence or absence of Al) led to identification of ~1500 transcripts per genotype with percentage annotation ranging from 21.94% (AR) to 29.94% (TH). A total of 511, 804 and 912 DEGs were identified in genotypes AR, IR and TH, respectively. IR showed upregulation of transcripts involved in exergonic processes. AR appears to conserve energy by downregulating key genes of glycolysis pathway and maintaining transcript levels of key exergonic step enzymes under Al stress. The tolerance in AR appears to be as a result of novel mechanism as none of the reported Al toxicity genes or QTLs overlap with significant DEGs. Components of signal transduction and regulatory machinery like transcripts encoding zinc finger protein, calcieurin binding protein and cell wall associated transcripts are among the highly upregulated DEGs in AR, suggesting increased and better signal transduction in response to Al stress in tolerant rice. Sequencing of NRAT1 and glycine-rich protein A3 revealed distinct haplotype for indica type AR. The newly identified components of Al tolerance will help in designing molecular breeding tools to enhance rice productivity in acidic soils.
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Gardiner LJ, Joynson R, Omony J, Rusholme-Pilcher R, Olohan L, Lang D, Bai C, Hawkesford M, Salt D, Spannagl M, Mayer KFX, Kenny J, Bevan M, Hall N, Hall A. Hidden variation in polyploid wheat drives local adaptation. Genome Res 2018; 28:1319-1332. [PMID: 30093548 PMCID: PMC6120627 DOI: 10.1101/gr.233551.117] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 07/16/2018] [Indexed: 12/20/2022]
Abstract
Wheat has been domesticated into a large number of agricultural environments and has the ability to adapt to diverse environments. To understand this process, we survey genotype, repeat content, and DNA methylation across a bread wheat landrace collection representing global genetic diversity. We identify independent variation in methylation, genotype, and transposon copy number. We show that these, so far unexploited, sources of variation have had a significant impact on the wheat genome and that ancestral methylation states become preferentially "hard coded" as single nucleotide polymorphisms (SNPs) via 5-methylcytosine deamination. These mechanisms also drive local adaption, impacting important traits such as heading date and salt tolerance. Methylation and transposon diversity could therefore be used alongside SNP-based markers for breeding.
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Affiliation(s)
| | - Ryan Joynson
- Earlham Institute, Norwich, NR4 7UZ, United Kingdom
| | - Jimmy Omony
- HelmholtzZentrum München, German Research Center for Environmental Health, Munich, 85764, Germany
| | | | - Lisa Olohan
- Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, United Kingdom
| | - Daniel Lang
- HelmholtzZentrum München, German Research Center for Environmental Health, Munich, 85764, Germany
| | - Caihong Bai
- Rothamsted Research, Harpenden, AL5 2JQ, United Kingdom
| | | | - David Salt
- University of Nottingham, Sutton Bonington Campus, Sutton Bonington, LE12 5RD, United Kingdom
| | - Manuel Spannagl
- HelmholtzZentrum München, German Research Center for Environmental Health, Munich, 85764, Germany
| | - Klaus F X Mayer
- HelmholtzZentrum München, German Research Center for Environmental Health, Munich, 85764, Germany.,Wissenschaftszentrum Weihenstephan (WZW), Technical University Munich, Freising, 85354, Germany
| | - John Kenny
- Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, United Kingdom
| | | | - Neil Hall
- Earlham Institute, Norwich, NR4 7UZ, United Kingdom.,School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Anthony Hall
- Earlham Institute, Norwich, NR4 7UZ, United Kingdom.,School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
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A quantitative approach for Cd, Cu, Fe and Mn through laser ablation imaging for evaluating the translocation and accumulation of metals in sunflower seeds. Talanta 2017; 167:317-324. [DOI: 10.1016/j.talanta.2017.02.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/10/2017] [Accepted: 02/12/2017] [Indexed: 12/20/2022]
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4
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Bai J, Qin Y, Liu J, Wang Y, Sa R, Zhang N, Jia R. Proteomic response of oat leaves to long-term salinity stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:3387-3399. [PMID: 27866362 DOI: 10.1007/s11356-016-8092-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 11/11/2016] [Indexed: 05/23/2023]
Abstract
Salinity adversely affects plant growth and production. Oat is a moderately salt-tolerant crop and can contribute to improving saline soil. The physiological and molecular responses of the oat plant to long-term salinity were studied. After a 16-day salt treatment (150 mmol L-1NaCl in Hoagland's solution), photosynthetic rate, maximum photosystem II photochemical efficiency, and actual efficiency of photosystem II decreased. The activities of superoxide dismutase, peroxidase, and catalase significantly increased. We also investigated the protein profiles of oat leaves in response to salinity and detected 30 reproducible protein spots by two-dimensional gel electrophoresis that were differentially abundant. Specifically, one protein was up-regulated and 29 proteins were down-regulated compared with the control. These 29 proteins were identified using MALDI-TOF mass spectrometry, and 19 corresponding genes were further investigated by quantitative real-time PCR. These proteins were involved in four types of biological processes: photosynthesis, carbohydrate metabolism and energy, protein biosynthesis, and folding and detoxification. This study indicates that the lower levels of Calvin cycle-related proteins, 50S ribosomal protein L10 and adenosine-triphosphate regulation-related proteins, and the high levels of antioxidant enzymes play important roles in the response of oat to long-term salinity stress.
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Affiliation(s)
- Jianhui Bai
- Institute of Grassland Research of Chinese Academy of Agricultural Sciences, Hohhot, 010010, People's Republic of China
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, 010019, People's Republic of China
| | - Yan Qin
- Institute of Grassland Research of Chinese Academy of Agricultural Sciences, Hohhot, 010010, People's Republic of China
| | - Jinghui Liu
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, 010019, People's Republic of China.
| | - Yuqing Wang
- Institute of Grassland Research of Chinese Academy of Agricultural Sciences, Hohhot, 010010, People's Republic of China.
| | - Rula Sa
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, 010019, People's Republic of China
| | - Na Zhang
- Science Innovation Team of Oats, Inner Mongolia Agricultural University, Hohhot, 010019, People's Republic of China
| | - Ruizong Jia
- Hawaii Agriculture Research Center, Kunia, HI, 96759, USA
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Sulfur alleviates arsenic toxicity by reducing its accumulation and modulating proteome, amino acids and thiol metabolism in rice leaves. Sci Rep 2015; 5:16205. [PMID: 26552588 PMCID: PMC4639781 DOI: 10.1038/srep16205] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 10/12/2015] [Indexed: 11/09/2022] Open
Abstract
Arsenic (As) contamination of water is a global concern and rice consumption is the biggest dietary exposure to human posing carcinogenic risks, predominantly in Asia. Sulfur (S) is involved in di-sulfide linkage in many proteins and plays crucial role in As detoxification. Present study explores role of variable S supply on rice leaf proteome, its inclination towards amino acids (AA) profile and non protein thiols under arsenite exposure. Analysis of 282 detected proteins on 2-DE gel revealed 113 differentially expressed proteins, out of which 80 were identified by MALDI-TOF-TOF. The identified proteins were mostly involved in glycolysis, TCA cycle, AA biosynthesis, photosynthesis, protein metabolism, stress and energy metabolism. Among these, glycolytic enzymes play a major role in AA biosynthesis that leads to change in AAs profiling. Proteins of glycolytic pathway, photosynthesis and energy metabolism were also validated by western blot analysis. Conclusively S supplementation reduced the As accumulation in shoot positively skewed thiol metabolism and glycolysis towards AA accumulation under AsIII stress.
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6
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Lopes Júnior CA, Barbosa HDS, Moretto Galazzi R, Ferreira Koolen HH, Gozzo FC, Arruda MAZ. Evaluation of proteome alterations induced by cadmium stress in sunflower (Helianthus annuus L.) cultures. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 119:170-7. [PMID: 26004357 DOI: 10.1016/j.ecoenv.2015.05.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 05/15/2023]
Abstract
The present study evaluates, at a proteomic level, changes in protein abundance in sunflower leaves in the absence or presence (at 50 or 700mg) of cadmium (as CdCl2). At the end of the cultivation period (45 days), proteins are extracted from leaves with phenol, separated by two-dimensional difference gel electrophoresis (2-D DIGE), and excised from the gels. The differential protein abundances (for proteins differing by more than 1.8 fold, which corresponds to 90% variation) are characterized using nESI-LC-MS/MS. The protein content decreases by approximately 41% in plants treated with 700mg Cd compared with control plants. By comparing all groups of plants evaluated in this study (Control vs. Cd-lower, Control vs. Cd-higher and Cd-lower vs. Cd-higher), 39 proteins are found differential and 18 accurately identified; the control vs. Cd-higher treatment is that presenting the most differential proteins. From identified proteins, those involved in energy and disease/defense (including stress), are the ribulose bisphosphate carboxylase large chain, transketolase, and heat shock proteins are the most differential abundant proteins. Thus, at the present study, photosynthesis is the main process affected by Cd in sunflowers, although these plants are highly tolerant to Cd.
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Affiliation(s)
- Cícero Alves Lopes Júnior
- Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Herbert de Sousa Barbosa
- Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; Department of Chemistry, Federal University of Piauí - UFPI, P.O. Box 6154, 64049-550 Teresina, PI, Brazil
| | - Rodrigo Moretto Galazzi
- Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Hector Henrique Ferreira Koolen
- National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; Dalton Mass Spectrometry Group, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Fábio Cesar Gozzo
- National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; Dalton Mass Spectrometry Group, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Marco Aurélio Zezzi Arruda
- Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil.
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Mercury fractionation in dourada (Brachyplatystoma rousseauxii) of the Madeira River in Brazil using metalloproteomic strategies. Talanta 2015; 132:239-44. [DOI: 10.1016/j.talanta.2014.09.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 09/09/2014] [Accepted: 09/11/2014] [Indexed: 11/22/2022]
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8
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9
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de Abreu FCP, da Costa PNM, Brondi AM, Pilau EJ, Gozzo FC, Eberlin MN, Trevisan MG, Garcia JS. Effects of cadmium and copper biosorption on Chlorella vulgaris. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 93:405-409. [PMID: 25151280 DOI: 10.1007/s00128-014-1363-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 08/16/2014] [Indexed: 06/03/2023]
Abstract
Changes in protein levels and lipid compositions in algal cells indicate the severity of stress related to toxic concentrations of heavy metals. In this study, the effects of exposure to cadmium and copper on Chlorella vulgaris and its capacity to remove metals were evaluated. The data revealed ion removal activity by microalgae under all treatments and different levels of protein expression after 48 h of exposure. Furthermore, we analyzed lipids contents to characterize them.
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Affiliation(s)
- Fabiano C P de Abreu
- LACFar, Institute of Chemistry, Federal University of Alfenas - UNIFAL-MG, Alfenas, Minas Gerais, 37130-000, Brazil
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Lefèvre I, Vogel-Mikuš K, Jeromel L, Vavpetič P, Planchon S, Arčon I, Van Elteren JT, Lepoint G, Gobert S, Renaut J, Pelicon P, Lutts S. Differential cadmium and zinc distribution in relation to their physiological impact in the leaves of the accumulating Zygophyllum fabago L. PLANT, CELL & ENVIRONMENT 2014; 37:1299-320. [PMID: 24237383 DOI: 10.1111/pce.12234] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 10/20/2013] [Accepted: 10/21/2013] [Indexed: 05/12/2023]
Abstract
Cadmium and zinc share many similar physiochemical properties, but their compartmentation, complexation and impact on other mineral element distribution in plant tissues may drastically differ. In this study, we address the impact of 10 μm Cd or 50 μm Zn treatments on ion distribution in leaves of a metallicolous population of the non-hyperaccumulating species Zygophyllum fabago at tissue and cell level, and the consequences on the plant response through a combined physiological, proteomic and metabolite approach. Micro-proton-induced X-ray emission and laser ablation inductively coupled mass spectrometry analyses indicated hot spots of Cd concentrations in the vicinity of vascular bundles in response to Cd treatment, essentially bound to S-containing compounds as revealed by extended X-ray absorption fine structure and non-protein thiol compounds analyses. A preferential accumulation of Zn occurred in vascular bundle and spongy mesophyll in response to Zn treatment, and was mainly bound to O/N-ligands. Leaf proteomics and physiological status evidenced a protection of photosynthetically active tissues and the maintenance of cell turgor through specific distribution and complexation of toxic ions, reallocation of some essential elements, synthesis of proteins involved in photosynthetic apparatus or C-metabolism, and metabolite synthesis with some specificities regarding the considered heavy metal treatment.
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Affiliation(s)
- Isabelle Lefèvre
- Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.13, 1348, Louvain-la-Neuve, Belgium
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11
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Lopes MS, Iglesia-Turiño S, Cabrera-Bosquet L, Serret MD, Bort J, Febrero A, Araus JL. Molecular and physiological mechanisms associated with root exposure to mercury in barley. Metallomics 2014; 5:1305-15. [PMID: 23925371 DOI: 10.1039/c3mt00084b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mercury (Hg) is a toxic metal that affects plant growth. Here the effect of Hg exposure on plant growth and leaf gas-exchange together with gene expression in roots is reported for barley. Hg was mainly accumulated in roots and only very small amounts were found in the shoots. Chlorophyll fluorescence and net photosynthesis were not affected by Hg. Nevertheless exposure to Hg reduced shoot and root growth, the shoot to root ratio, stomatal conductance, carbon isotope discrimination and expression of an aquaporin transcript, whereas abscisic acid related transcripts were over-expressed. These results suggested some degree of limitation to water uptake causing a moderate water stress when plants are exposed to Hg. Microarray (MapMan) analysis revealed changes in the transcription of genes involved in nitrogen metabolism, which were accompanied by decreased nitrogen concentrations in the shoots, together with an increase in transcripts associated with secondary metabolism, stress, inhibition of DNA synthesis/chromatin structure and cell organization elements. Moreover, Hg induced the expression of many transcripts known to be involved in the uptake, accumulation, transport and general responses to other heavy metals. It is concluded that barley is able to accumulate high amounts of Hg in roots through several transcriptional, metabolic and physiological adjustments.
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Affiliation(s)
- Marta S Lopes
- CIMMYT, Apdo. Postal 6-641, 06600 México, D.F., Mexico.
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12
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Vogiatzis C, Zachariadis G. Tandem mass spectrometry in metallomics and the involving role of ICP-MS detection: A review. Anal Chim Acta 2014; 819:1-14. [DOI: 10.1016/j.aca.2014.01.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 01/05/2014] [Accepted: 01/10/2014] [Indexed: 01/02/2023]
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13
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14
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Selenium fractionation from plasma, muscle and liver of Nile tilapia (Oreochromis niloticus). JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2013. [DOI: 10.1007/s11694-013-9151-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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16
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Fulda S, Mikkat S, Stegmann H, Horn R. Physiology and proteomics of drought stress acclimation in sunflower (Helianthus annuus L.). PLANT BIOLOGY (STUTTGART, GERMANY) 2011; 13:632-42. [PMID: 21668604 DOI: 10.1111/j.1438-8677.2010.00426.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
An easy and manageable in vitro screening system for drought tolerance of sunflower seedlings based on MS media supplemented with polyethylene glycol 6000 was evaluated. Morphological and physiological parameters were compared between control (-0.05 MPa) and drought-stressed (-0.6 MPa) seedlings of Helianthus annuus L. cv. Peredovick. There was a significant growth deficit in drought-stressed plants compared to control plants in terms of hypocotyl length, and shoot and root fresh mass. Shoot growth was more restricted than root growth, resulting in an increased root/shoot ratio of drought-stressed plants. Accumulation of osmolytes such as inositol (65-fold), glucose (58-fold), proline (55-fold), fructose (11-fold) and sucrose (eightfold), in leaves of drought-stressed plants could be demonstrated by gas-liquid chromatography. Soluble protein patterns of leaves were analysed with two-dimensional gel electrophoresis (2D-PAGE) and MALDI-TOF mass spectrometry. A set of 46 protein spots allowed identification of 19 marker proteins. Quantitative changes in protein expression of drought-stressed versus control plants were detected. In leaves of drought-stressed sunflower seedlings six proteins were significantly up-regulated more than twofold: a putative caffeoyl-CoA 3-O-methyltransferase (4.5-fold), a fructokinase 3 (3.3-fold), a vegetative storage protein (2.5-fold), a glycine-rich RNA binding protein (2.2-fold), a CuZn-superoxide dismutase (2.1-fold) and an unknown low molecular weight protein (2.3-fold). These proteins represent general stress proteins induced under drought conditions or proteins contributing to basic carbon metabolism. The up-regulated proteins are interesting candidates for further physiological and molecular investigations regarding drought tolerance in sunflower.
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Affiliation(s)
- S Fulda
- Institut für Biowissenschaften, Pflanzengenetik, Universität Rostock, Albert-Einstein-Strasse 3, Rostock, Germany
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17
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Metallomic study on plasma samples from Nile tilapia using SR-XRF and GFAAS after separation by 2D PAGE: initial results. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0522-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Brandão AR, Barbosa HS, Arruda MAZ. Image analysis of two-dimensional gel electrophoresis for comparative proteomics of transgenic and non-transgenic soybean seeds. J Proteomics 2010; 73:1433-40. [PMID: 20123049 DOI: 10.1016/j.jprot.2010.01.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 01/08/2010] [Accepted: 01/16/2010] [Indexed: 11/28/2022]
Abstract
Considering the importance of bidimensional electrophoresis and image analysis in comparative proteomics, the parameters that influence the analysis of protein expression of transgenic and non-transgenic soybean seeds were evaluated. The loaded mass of the proteins (150-500 microg), the pH separation range (3-10 or 4-7), and manual/automatic image editing were evaluated. Additionally, after optimizing the conditions, histograms and matchings were obtained in order to accurately analyze the variations (90%) in protein expression. From this, 10 proteins displayed significant differences in expression, and eight of them were characterized and identified by mass spectrometry.
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Affiliation(s)
- A R Brandão
- Spectrometry, Sample Preparation and Mechanization Group-GEPAM, Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP, Brazil
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19
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Evaluation of sample preparation protocols for proteomic analysis of sunflower leaves. Talanta 2010; 80:1545-51. [DOI: 10.1016/j.talanta.2009.06.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 05/28/2009] [Accepted: 06/02/2009] [Indexed: 11/17/2022]
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Poleti MD, Tesch AC, Crepaldi CR, Souza GHMF, Eberlin MN, de Cerqueira César M. Relationship between expression of voltage-dependent anion channel (VDAC) isoforms and type of hexokinase binding sites on brain mitochondria. J Mol Neurosci 2009; 41:48-54. [PMID: 19688190 DOI: 10.1007/s12031-009-9278-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Accepted: 07/27/2009] [Indexed: 11/30/2022]
Abstract
Voltage-dependent anion channels (VDAC) are pore-forming proteins found in the outer mitochondrial membrane of eukaryotes. VDACs are known to play an essential role in cellular metabolism and in early stages of apoptosis. In mammals, three VDAC isoforms have been identified. A proteomic approach was exploited to study the expression of VDAC isoforms in rat, bovine, and chicken brain mitochondria. Given the importance of mitochondrially bound hexokinase in regulation of aerobic glycolysis in brain, we studied the possibility that differences in the relative expression of VDAC isoforms may be a factor in determining the species-dependent ratio of type A/type B hexokinase binding sites on brain mitochondria. The spots were characterized, and the signal intensities among spots were compared. VDAC1 was the most abundantly expressed of the three isoforms. Moreover the expression of VDAC1 plus VDAC2 was significantly higher in bovine than in rat brain. Chicken brain mitochondria showed the highest VDAC1 expression and the lowest of VDAC2. Bovine brain mitochondria had the highest VDAC2 levels. We concluded that the nature of hexokinase binding site is not determined by the expression of a single VDAC isoform.
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Affiliation(s)
- Mirele Daiana Poleti
- Laboratory of Neuroscience and Proteomics, School of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte 225, 13635-900, Pirassununga, SP, Brazil
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Shanker AK, Djanaguiraman M, Venkateswarlu B. Chromium interactions in plants: current status and future strategies. Metallomics 2009; 1:375-83. [DOI: 10.1039/b904571f] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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