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Sultan A, Andersen B, Christensen JB, Poulsen HD, Svensson B, Finnie C. Quantitative Proteomics Analysis of Barley-Based Liquid Feed and the Effect of Protease Inhibitors and NADPH-Dependent Thioredoxin Reductase/Thioredoxin (NTR/Trx) System. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:6432-6444. [PMID: 31095381 DOI: 10.1021/acs.jafc.9b01708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Liquid feeding strategies have been devised with the aim of enhancing grain nutrient availability for livestock. It is characterized by a steeping/soaking period that softens the grains and initiates mobilization of seed storage reserves. The present study uses 2D gel-based proteomics to investigate the role of proteolysis and reduction by thioredoxins over a 48 h steeping period by monitoring protein abundance dynamics in barley-based liquid feed samples supplemented with either protease inhibitors or NADPH-dependent thioredoxin reductase/thioredoxin (NTR/Trx). Several full-length storage proteins were only identified in the water-extractable fraction of feed containing protease inhibitors, illustrating significant inhibition of proteolytic activities arising during the steeping period. Application of functional NTR/Trx to liquid feed reductively increased the solubility of known and potentially new Trx-target proteins, e.g., outer membrane protein X, and their susceptibility to proteolysis. Thus, the NTR/Trx system exhibits important potential as a feed additive to enhance nutrient digestibility in monogastric animals.
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Affiliation(s)
- Abida Sultan
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine , Technical University of Denmark , Søltofts Plads, Building 224 , DK-2800 Kgs. Lyngby , Denmark
| | - Birgit Andersen
- Agricultural and Environmental Proteomics, Department of Systems Biology , Technical University of Denmark , Søltofts Plads, Building 224 , DK-2800 Kgs. Lyngby , Denmark
| | - Jesper Bjerg Christensen
- Department of Animal Science, Animal Nutrition and Physiology , Aarhus University , Blichers Allé 20, Building S20 , DK-8830 Tjele , Denmark
| | - Hanne Damgaard Poulsen
- Department of Animal Science, Animal Nutrition and Physiology , Aarhus University , Blichers Allé 20, Building S20 , DK-8830 Tjele , Denmark
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine , Technical University of Denmark , Søltofts Plads, Building 224 , DK-2800 Kgs. Lyngby , Denmark
| | - Christine Finnie
- Agricultural and Environmental Proteomics, Department of Systems Biology , Technical University of Denmark , Søltofts Plads, Building 224 , DK-2800 Kgs. Lyngby , Denmark
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2
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Lau BYC, Othman A, Ramli US. Application of Proteomics Technologies in Oil Palm Research. Protein J 2018; 37:473-499. [DOI: 10.1007/s10930-018-9802-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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3
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Cohen M, Fluhr R. Noncanonical interactions between serpin and β-amylase in barley grain improve β-amylase activity in vitro. PLANT DIRECT 2018; 2:e00054. [PMID: 31245723 PMCID: PMC6508567 DOI: 10.1002/pld3.54] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 05/31/2023]
Abstract
Serpin protease inhibitors and β-amylase starch hydrolases are very abundant seed proteins in the endosperm of grasses. β-amylase is a crucial enzyme in the beer industry providing maltose for fermenting yeast. In animals and plants, inhibitory serpins form covalent linkages that inactivate their cognate proteases. Additionally, in animals, noninhibitory functions for serpins are observed such as metabolite carriers and chaperones. The function of serpins in seeds has yet to be unveiled. In developing endosperm, serpin Z4 and β-amylase showed similar in vivo spatio-temporal accumulation properties and colocalize in the cytosol of transformed tobacco leaves. A molecular interaction between recombinant proteins of serpin Z4 and β-amylase was revealed by surface plasmon resonance and microscale thermophoresis yielding a dissociation constant of 10-7 M. Importantly, the addition of serpin Z4 significantly changes β-amylase enzymatic properties by increasing its maximal catalytic velocity. The presence of serpin Z4 stabilizes β-amylase activity during heat treatment without affecting its critical denaturing temperature. Oxidative stress, simulated by the addition of CuCl2, leads to the formation of high molecular weight polymers of β-amylase similar to those detected in vivo. The polymers were cross-linked through disulfide bonds, the formation of which was repressed when serpin Z4 was present. The results suggest an unprecedented function for a plant seed serpin as a β-amylase-specific chaperone-like partner that could optimize β-amylase activity upon germination. This report is the first to describe a noninhibitory function for a serpin in plants.
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Affiliation(s)
- Maja Cohen
- Department of Plant SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Robert Fluhr
- Department of Plant SciencesWeizmann Institute of ScienceRehovotIsrael
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Murmann AN, Hägglund P, Svensson B, Lund MN. The Reducing Capacity of Thioredoxin on Oxidized Thiols in Boiled Wort. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10101-10106. [PMID: 29087194 DOI: 10.1021/acs.jafc.7b04179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Free thiol-containing proteins are suggested to work as antioxidants in beer, but the majority of thiols in wort are present in their oxidized form as disulfides and are therefore not active as antioxidants. Thioredoxin, a disulfide-reducing protein, is released into the wort from some yeast strains during fermentation. The capacity of the thioredoxin enzyme system (thioredoxin, thioredoxin reductase, NADPH) to reduce oxidized thiols in boiled wort under fermentation-like conditions was studied. Free thiols were quantitated in boiled wort samples by derivatization with ThioGlo1 and fluorescence detection of thiol-derivatives. When boiled wort was incubated with all components of the thioredoxin system at pH 7.0 and 25 °C for 60 min under anaerobic conditions, the free thiol concentration increased from 25 to 224 μM. At pH values similar to wort (pH 5.7) and beer (pH 4.5), the thioredoxin system was also capable of increasing the free thiol concentration, although with lower efficiency to 187 and 170 μM, respectively. The presence of sulfite, an important antioxidant in beer secreted by the yeast during fermentation, was found to inactivate thioredoxin by sulfitolysis. Reduction of oxidized thiols by the thioredoxin system was therefore only found to be efficient in the absence of sulfite.
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Affiliation(s)
- Anne N Murmann
- Department of Food Science, Faculty of Science, University of Copenhagen , Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Per Hägglund
- Department of Biotechnology and Biomedicine, Technical University of Denmark , Søltofts Plads, Building 224, DK-2800 Kongens Lyngby, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen , Blegdamsvej 3, DK-2200 Copenhagen N, Denmark
| | - Birte Svensson
- Department of Biotechnology and Biomedicine, Technical University of Denmark , Søltofts Plads, Building 224, DK-2800 Kongens Lyngby, Denmark
| | - Marianne N Lund
- Department of Food Science, Faculty of Science, University of Copenhagen , Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen , Blegdamsvej 3, DK-2200 Copenhagen N, Denmark
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5
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Hägglund P, Finnie C, Yano H, Shahpiri A, Buchanan BB, Henriksen A, Svensson B. Seed thioredoxin h. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:974-82. [PMID: 26876537 DOI: 10.1016/j.bbapap.2016.02.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/20/2016] [Accepted: 02/09/2016] [Indexed: 12/30/2022]
Abstract
Thioredoxins are nearly ubiquitous disulfide reductases involved in a wide range of biochemical pathways in various biological systems, and also implicated in numerous biotechnological applications. Plants uniquely synthesize an array of thioredoxins targeted to different cell compartments, for example chloroplastic f- and m-type thioredoxins involved in regulation of the Calvin-Benson cycle. The cytosolic h-type thioredoxins act as key regulators of seed germination and are recycled by NADPH-dependent thioredoxin reductase. The present review on thioredoxin h systems in plant seeds focuses on occurrence, reaction mechanisms, specificity, target protein identification, three-dimensional structure and various applications. The aim is to provide a general background as well as an update covering the most recent findings. This article is part of a Special Issue entitled: Plant Proteomics--a bridge between fundamental processes and crop production, edited by Dr. Hans-Peter Mock.
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Affiliation(s)
- Per Hägglund
- Protein and Immune Systems Biology, Department of Systems Biology, Matematiktorvet, Building 301, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Christine Finnie
- Carlsberg Research Laboratory, Gamle Carlsberg Vej 4, DK-1799 Copenhagen V, Denmark
| | - Hiroyuki Yano
- National Food Research Institute, National Agriculture and Food Research Organization, Kannondai 2-1-12, Tsukuba, Ibaraki 305-8642, Japan
| | - Azar Shahpiri
- Department of Agricultural Biotechnology, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Bob B Buchanan
- Department of Plant and Microbial Biology, Koshland Hall 111, Berkeley, CA 94720-3102, USA
| | - Anette Henriksen
- Department of Large Protein Biophysics and Formulation, Global Research Unit, Novo Nordisk A/S, Novo Nordisk Park, DK-2760 Måløv, Denmark
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department of Systems Biology, Elektrovej, Building 375, DK-2800 Kgs. Lyngby, Denmark.
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Hu J, Rampitsch C, Bykova NV. Advances in plant proteomics toward improvement of crop productivity and stress resistancex. FRONTIERS IN PLANT SCIENCE 2015; 6:209. [PMID: 25926838 PMCID: PMC4396383 DOI: 10.3389/fpls.2015.00209] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 03/16/2015] [Indexed: 05/14/2023]
Abstract
Abiotic and biotic stresses constrain plant growth and development negatively impacting crop production. Plants have developed stress-specific adaptations as well as simultaneous responses to a combination of various abiotic stresses with pathogen infection. The efficiency of stress-induced adaptive responses is dependent on activation of molecular signaling pathways and intracellular networks by modulating expression, or abundance, and/or post-translational modification (PTM) of proteins primarily associated with defense mechanisms. In this review, we summarize and evaluate the contribution of proteomic studies to our understanding of stress response mechanisms in different plant organs and tissues. Advanced quantitative proteomic techniques have improved the coverage of total proteomes and sub-proteomes from small amounts of starting material, and characterized PTMs as well as protein-protein interactions at the cellular level, providing detailed information on organ- and tissue-specific regulatory mechanisms responding to a variety of individual stresses or stress combinations during plant life cycle. In particular, we address the tissue-specific signaling networks localized to various organelles that participate in stress-related physiological plasticity and adaptive mechanisms, such as photosynthetic efficiency, symbiotic nitrogen fixation, plant growth, tolerance and common responses to environmental stresses. We also provide an update on the progress of proteomics with major crop species and discuss the current challenges and limitations inherent to proteomics techniques and data interpretation for non-model organisms. Future directions in proteomics research toward crop improvement are further discussed.
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Affiliation(s)
- Junjie Hu
- Department of Biology, Memorial University of Newfoundland, St. John’sNL, Canada
- Cereal Proteomics, Cereal Research Centre, Agriculture and Agri-Food Canada, MordenMB, Canada
| | - Christof Rampitsch
- Cereal Proteomics, Cereal Research Centre, Agriculture and Agri-Food Canada, MordenMB, Canada
| | - Natalia V. Bykova
- Cereal Proteomics, Cereal Research Centre, Agriculture and Agri-Food Canada, MordenMB, Canada
- *Correspondence: Natalia V. Bykova, Cereal Proteomics, Cereal Research Centre, Agriculture and Agri-Food Canada, 101 Route 100, Morden, MB R6M 1Y5, Canada
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Barba-Espín G, Dedvisitsakul P, Hägglund P, Svensson B, Finnie C. Gibberellic acid-induced aleurone layers responding to heat shock or tunicamycin provide insight into the N-glycoproteome, protein secretion, and endoplasmic reticulum stress. PLANT PHYSIOLOGY 2014; 164:951-65. [PMID: 24344171 PMCID: PMC3912118 DOI: 10.1104/pp.113.233163] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The growing relevance of plants for the production of recombinant proteins makes understanding the secretory machinery, including the identification of glycosylation sites in secreted proteins, an important goal of plant proteomics. Barley (Hordeum vulgare) aleurone layers maintained in vitro respond to gibberellic acid by secreting an array of proteins and provide a unique system for the analysis of plant protein secretion. Perturbation of protein secretion in gibberellic acid-induced aleurone layers by two independent mechanisms, heat shock and tunicamycin treatment, demonstrated overlapping effects on both the intracellular and secreted proteomes. Proteins in a total of 22 and 178 two-dimensional gel spots changing in intensity in extracellular and intracellular fractions, respectively, were identified by mass spectrometry. Among these are proteins with key roles in protein processing and secretion, such as calreticulin, protein disulfide isomerase, proteasome subunits, and isopentenyl diphosphate isomerase. Sixteen heat shock proteins in 29 spots showed diverse responses to the treatments, with only a minority increasing in response to heat shock. The majority, all of which were small heat shock proteins, decreased in heat-shocked aleurone layers. Additionally, glycopeptide enrichment and N-glycosylation analysis identified 73 glycosylation sites in 65 aleurone layer proteins, with 53 of the glycoproteins found in extracellular fractions and 36 found in intracellular fractions. This represents major progress in characterization of the barley N-glycoproteome, since only four of these sites were previously described. Overall, these findings considerably advance knowledge of the plant protein secretion system in general and emphasize the versatility of the aleurone layer as a model system for studying plant protein secretion.
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Affiliation(s)
- Gregorio Barba-Espín
- Agricultural and Environmental Proteomics , Department of Systems Biology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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8
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Hägglund P, Bunkenborg J, Maeda K, Finnie C, Svensson B. Identification of thioredoxin target disulfides using isotope-coded affinity tags. Methods Mol Biol 2014; 1072:677-685. [PMID: 24136556 DOI: 10.1007/978-1-62703-631-3_47] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Thioredoxins (Trx) are small redox proteins that reduce disulfide bonds in various target proteins and maintain cellular thiol redox control. Here, a thiol-specific labeling and affinity enrichment approach for identification and relative quantification of Trx target disulfides in complex protein extracts is described. The procedure utilizes the isotope-coded affinity tag (ICAT) reagents containing a thiol reactive iodoacetamide group and a biotin affinity tag to target peptides containing reduced cysteine residues. The identification of substrates for Trx and the extent of target disulfide reduction is determined by LC-MS/MS-based quantification of tryptic peptides labeled with "light" ((12)C) and "heavy" ((13)C) ICAT reagents. The methodology can be adapted to monitor the effect of different reductants or oxidants on the redox status of thiol/disulfide proteomes in biological systems.
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Affiliation(s)
- Per Hägglund
- Enzyme and Protein Chemistry, Department of Systems Biology, Technical University of Denmark, Kongens Lyngby, Denmark
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9
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Guo H, Wang S, Xu F, Li Y, Ren J, Wang X, Niu H, Yin J. The role of thioredoxin h in protein metabolism during wheat (Triticum aestivum L.) seed germination. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 67:137-143. [PMID: 23562797 DOI: 10.1016/j.plaphy.2013.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Accepted: 03/05/2013] [Indexed: 06/02/2023]
Abstract
Thioredoxin h can regulate the redox environment in the cell and play an important role in the germination of cereals. In the present study, the thioredoxin s antisense transgenic wheat with down-regulation of thioredoxin h was used to study the role of thioredoxin h in protein metabolism during germination of wheat seeds, and to explore the mechanism of the thioredoxin s antisense transgenic wheat seeds having high resistance to pre-harvest sprouting. The qRT-PCR results showed that the expression of protein disulfide isomerase in the thioredoxin s antisense transgenic wheat was up-regulated, which induced easily forming glutenin macropolymers and the resistance of storage proteins to degradation. The expression of serine protease inhibitor was also up-regulated in transgenic wheat, which might be responsible for the decreased activity of thiocalsin during the germination. The expression of WRKY6 in transgenic wheat was down-regulated, which was consistent with the decreased activity of glutamine oxoglutarate aminotransferase. In transgenic wheat, the activities of glutamate dehydrogenase, glutamic pyruvic transaminase and glutamic oxaloacetic transaminase were down-regulated, indicating that the metabolism of amino acid was lower than that in wild-type wheat during seed germination. A putative model for the role of thioredoxin h in protein metabolism during wheat seed germination was proposed and discussed.
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Affiliation(s)
- Hongxiang Guo
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China; College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Shaoxin Wang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Fangfang Xu
- College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Yongchun Li
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jiangping Ren
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xiang Wang
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hongbin Niu
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jun Yin
- National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, 450002, China.
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10
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Björnberg O, Maeda K, Svensson B, Hägglund P. Dissecting Molecular Interactions Involved in Recognition of Target Disulfides by the Barley Thioredoxin System. Biochemistry 2012; 51:9930-9. [DOI: 10.1021/bi301051b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Olof Björnberg
- Enzyme and Protein Chemistry, Department
of Systems Biology,
Søltofts Plads, Building 224, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Kenji Maeda
- Enzyme and Protein Chemistry, Department
of Systems Biology,
Søltofts Plads, Building 224, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department
of Systems Biology,
Søltofts Plads, Building 224, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Per Hägglund
- Enzyme and Protein Chemistry, Department
of Systems Biology,
Søltofts Plads, Building 224, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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11
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Jensen JM, Hägglund P, Christensen HEM, Svensson B. Inactivation of barley limit dextrinase inhibitor by thioredoxin-catalysed disulfide reduction. FEBS Lett 2012; 586:2479-82. [DOI: 10.1016/j.febslet.2012.06.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 05/31/2012] [Accepted: 06/01/2012] [Indexed: 11/29/2022]
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12
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Abdallah C, Dumas-Gaudot E, Renaut J, Sergeant K. Gel-based and gel-free quantitative proteomics approaches at a glance. INTERNATIONAL JOURNAL OF PLANT GENOMICS 2012; 2012:494572. [PMID: 23213324 PMCID: PMC3508552 DOI: 10.1155/2012/494572] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 10/12/2012] [Indexed: 05/06/2023]
Abstract
Two-dimensional gel electrophoresis (2-DE) is widely applied and remains the method of choice in proteomics; however, pervasive 2-DE-related concerns undermine its prospects as a dominant separation technique in proteome research. Consequently, the state-of-the-art shotgun techniques are slowly taking over and utilising the rapid expansion and advancement of mass spectrometry (MS) to provide a new toolbox of gel-free quantitative techniques. When coupled to MS, the shotgun proteomic pipeline can fuel new routes in sensitive and high-throughput profiling of proteins, leading to a high accuracy in quantification. Although label-based approaches, either chemical or metabolic, gained popularity in quantitative proteomics because of the multiplexing capacity, these approaches are not without drawbacks. The burgeoning label-free methods are tag independent and suitable for all kinds of samples. The challenges in quantitative proteomics are more prominent in plants due to difficulties in protein extraction, some protein abundance in green tissue, and the absence of well-annotated and completed genome sequences. The goal of this perspective assay is to present the balance between the strengths and weaknesses of the available gel-based and -free methods and their application to plants. The latest trends in peptide fractionation amenable to MS analysis are as well discussed.
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Affiliation(s)
- Cosette Abdallah
- Environment and Agro-Biotechnologies Department, Centre de Recherche Public-Gabriel Lippmann, 41 rue du Brill, 4422 Belvaux, Luxembourg
- UMR Agroécologie INRA 1347/Agrosup/Université de Bourgogne, Pôle Interactions Plantes Microorganismes ERL 6300 CNRS, Boite Postal 86510, 21065 Dijon Cedex, France
| | - Eliane Dumas-Gaudot
- UMR Agroécologie INRA 1347/Agrosup/Université de Bourgogne, Pôle Interactions Plantes Microorganismes ERL 6300 CNRS, Boite Postal 86510, 21065 Dijon Cedex, France
| | - Jenny Renaut
- Environment and Agro-Biotechnologies Department, Centre de Recherche Public-Gabriel Lippmann, 41 rue du Brill, 4422 Belvaux, Luxembourg
| | - Kjell Sergeant
- Environment and Agro-Biotechnologies Department, Centre de Recherche Public-Gabriel Lippmann, 41 rue du Brill, 4422 Belvaux, Luxembourg
- *Kjell Sergeant:
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13
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Hameed M. S. S, Sarma SP. The Structure of the Thioredoxin–Triosephosphate Isomerase Complex Provides Insights into the Reversible Glutathione-Mediated Regulation of Triosephosphate Isomerase. Biochemistry 2011; 51:533-44. [DOI: 10.1021/bi201224s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shahul Hameed M. S.
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, Karnataka, India
| | - Siddhartha P. Sarma
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, Karnataka, India
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Finnie C, Sultan A, Grasser KD. From protein catalogues towards targeted proteomics approaches in cereal grains. PHYTOCHEMISTRY 2011; 72:1145-1153. [PMID: 21134685 DOI: 10.1016/j.phytochem.2010.11.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 11/09/2010] [Accepted: 11/11/2010] [Indexed: 05/27/2023]
Abstract
Due to their importance for human nutrition, the protein content of cereal grains has been a subject of intense study for over a century and cereal grains were not surprisingly one of the earliest subjects for 2D-gel-based proteome analysis. Over the last two decades, countless cereal grain proteomes, mostly derived using 2D-gel based technologies, have been described and hundreds of proteins identified. However, very little is still known about post-translational modifications, subcellular proteomes, and protein-protein interactions in cereal grains. Development of techniques for improved extraction, separation and identification of proteins and peptides is facilitating functional proteomics and analysis of sub-proteomes from small amounts of starting material, such as seed tissues. The combination of proteomics with structural and functional analysis is increasingly applied to target subsets of proteins. These "next-generation" proteomics studies will vastly increase our depth of knowledge about the processes controlling cereal grain development, nutritional and processing characteristics.
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Affiliation(s)
- Christine Finnie
- Enzyme and Protein Chemistry, Department of Systems Biology, Technical University of Denmark, Søltofts Plads, Bldg 224, DK-2800 Kgs. Lyngby, Denmark.
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15
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Finnie C, Andersen B, Shahpiri A, Svensson B. Proteomes of the barley aleurone layer: A model system for plant signalling and protein secretion. Proteomics 2011; 11:1595-605. [DOI: 10.1002/pmic.201000656] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 11/26/2010] [Accepted: 12/29/2010] [Indexed: 11/08/2022]
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16
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Quantitative plant proteomics. Proteomics 2011; 11:756-75. [DOI: 10.1002/pmic.201000426] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 09/10/2010] [Accepted: 10/13/2010] [Indexed: 01/18/2023]
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