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Holopainen URM, Wilhelmson A, Home S, Poutanen K, Shewry PR. Day-length effects on protein localisation affect water absorption in barley (Hordeum vulgare) grains. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2012; 92:2944-2951. [PMID: 22549917 DOI: 10.1002/jsfa.5706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 03/16/2012] [Accepted: 03/19/2012] [Indexed: 05/31/2023]
Abstract
BACKGROUND Hordeins are major storage proteins of barley (Hordeum vulgare L.) grains and are considered to influence malting and brewing by forming a matrix surrounding the starch granules which affects the release of fermentable sugars. However, the extent to which environmental factors affect hordein location, and the impact of this on malting performance, have not so far been studied. Therefore the relationship of hordein location to water uptake and malting quality were studied by growing barley cv. Barke under different daylengths (14 h and 18 h of light) in controlled environment conditions. RESULTS Differences in the locations of hordein storage proteins were observed, with C hordein being located more deeply within the endosperm of both developing grains at 35 days after anthesis and in mature grains under long-day conditions. This deeper location of C hordein was correlated positively with water uptake during the steeping phase of malting. CONCLUSION An effect of environment (daylength) on the localisation of C hordein was demonstrated. This difference in hordein localisation was also associated with differences in malting quality with water uptake in the steeping phase being associated positively with the deeper location of C hordein. These results indicate that environmental effects on protein location may affect malting performance of barley grains.
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Rumbo M, Chirdo FG, Fossati CA, Anon MC. Analysis of Anti-Prolamin Monoclonal Antibody Reactivity Using Prolamin Fractions Purified by Preparative Electrophoresis. FOOD AGR IMMUNOL 2010. [DOI: 10.1080/09540100099616] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Lambourne J, Tosi P, Marsh J, Bhandari D, Green R, Frazier R, Shewry PR. Characterisation of an s-type low molecular weight glutenin subunit of wheat and its proline and glutamine-rich repetitive domain. J Cereal Sci 2010. [DOI: 10.1016/j.jcs.2009.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chirdo FG, Añón MC, Fossati CA. Development of high‐sensitive enzyme immunoassays for gliadin quantification using the streptavidin‐biotin amplification system. FOOD AGR IMMUNOL 2008. [DOI: 10.1080/09540109809354977] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Brett GM, Mills ENC, Bacon J, Wellner N, Husain RD, Tatham AS, Shewry PR, Morgan MRA. Temperature-dependent binding of monoclonal antibodies to C hordein. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1594:17-26. [PMID: 11825605 DOI: 10.1016/s0167-4838(01)00269-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The consensus octapeptide repeat motif of the barley seed storage protein C hordein, Pro-Gln-Gln-Pro-Phe-Pro-Gln-Gln, forms the epitope of two anti-prolamin monoclonal antibodies (Mabs), IFRN 0061 and 0614. The Mabs were found to exhibit unusual temperature-dependent binding characteristics, recognising C hordein and a peptide corresponding to the consensus repeat at 5 degrees C but not at 37 degrees C, as determined by enzyme-linked immunosorbent assay (ELISA). The K(d) of IFRN 0614 for the consensus peptide was found to be 1.2x10(12) mol(-1) at 12 degrees C, but no constant could be calculated at 37 degrees C due to a lack of binding. Similar ELISA binding characteristics were observed with an anti-C hordein polyclonal antiserum and a Mab raised to the consensus peptide. Circular dichroism (CD) and Fourier-transform infrared (FTIR) spectroscopy showed that the protein and the consensus peptide exist in a temperature-dependent equilibrium of poly-L-proline II type structures and beta-turn conformations. Whilst thermodynamic and kinetic effects may reduce antibody binding at higher temperatures, they cannot account for the complete loss of Mab recognition at higher temperatures. It seems likely that the Mabs preferentially recognise the Pro-Gln-Gln-Pro-Phe-Pro-Gln-Gln motif when presented in a conformation which may correspond to the poly-L-proline II type conformation which dominates the CD and FTIR spectra at 4-12 degrees C.
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Affiliation(s)
- Gary M Brett
- of Food Research, Norwich Laboratory, Norwich Research Park, Colney, Norwich NR4 7UA, UK
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Haasnoot W, Olieman K, Cazemier G, Verheijen R. Direct biosensor immunoassays for the detection of nonmilk proteins in milk powder. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:5201-5206. [PMID: 11714303 DOI: 10.1021/jf010440p] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The low prices of some nonmilk proteins make them attractive as potential adulterants in dairy products. An optical biosensor (BIACORE 3000) was used to develop a direct and combined biosensor immunoassay (BIA) for the simultaneous detection of soy, pea, and soluble wheat proteins in milk powders. Affinity-purified polyclonal antibodies raised against the three protein sources were immobilized in different flow channels (Fcs) on the biosensor chip (CM5). Dissolved milk powders were injected (20 microL injections at 20 microL min(-1)) through the serially connected Fcs, and the antibody-bound plant proteins were detected directly. The total run time between samples, including a regeneration step with 5 microL of 10 mM HCl, was 5 min. The limits of detection in milk powder were below 0.1% of plant protein in the total milk protein content. The antibodies also recognized some proteins from other plant sources, which made this BIA even more suitable as a broad screening assay for nonmilk proteins.
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Affiliation(s)
- W Haasnoot
- State Institute for Quality Control of Agricultural Products (RIKILT), P.O. Box 230, 6700 AE Wageningen, The Netherlands.
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Chambers SJ, Brett GM, Clare Mills EN, Morgan MR. Multiantigenic peptides as standards in immunoassays for complex proteins: use of LGQQQPFPPQQPY in an enzyme-linked immunosorbent assay for gluten. Anal Biochem 2001; 292:301-5. [PMID: 11355866 DOI: 10.1006/abio.2001.5037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- S J Chambers
- Nutrition, Health and Consumer Sciences Division, Food Materials Division, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, United Kingdom.
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Antigenicity of Wheat Prolamins: Detailed Epitope Analysis using a Panel of Monoclonal Antibodies. J Cereal Sci 2000. [DOI: 10.1006/jcrs.2000.0316] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rumbo M, Chirdo FG, Añón MC, Añón MC, Fossati CA. Immunoblotting of gliadins separated by acid PAGE: Analysis of electrotransference conditions. FOOD AGR IMMUNOL 1997. [DOI: 10.1080/09540109709354943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Mills ENC, Brett GM, Holden S, Kauffman JA, Tatton MJ, Morgan MRA. Production of monoclonal antibodies to gluten proteins and their use in developing tests for gluten quality. FOOD AGR IMMUNOL 1995. [DOI: 10.1080/09540109509354877] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Brett GM, Mills EN, Tatham AS, Fido RJ, Shewry PR, Morgan MR. Immunochemical identification of LMW subunits of glutenin associated with bread-making quality of wheat flours. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1993; 86:442-8. [PMID: 24193591 DOI: 10.1007/bf00838559] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/1992] [Accepted: 10/20/1992] [Indexed: 05/10/2023]
Abstract
A murine monoclonal antibody (IFRN 0067), one of a library developed against prolamin fractions fromTriticum aestivum, has been characterised using a combination of immunoassay and immunoblotting techniques. The antibody was specific for two glutenin polypeptides which appeared by 2-dimensional electrophoresis to belong to the B group of LMW subunits. From results of antibody-binding studies with material extracted from genetic stocks, it was deduced that the target polypeptides were encoded on the short arm of chromosome 1D. The antibody was used in an immunoassay of bread wheats with a range of anticipated baking scores and for flours of known baking performance. Significant correlations were found between immunoassay and test-bake results. Indeed, correlation of IFRN 0067 binding with loaf volume was equal or better than that provided by alveograph parameters. The results provide evidence that LMW subunits contribute to the bread-making properties of wheat glutenin, as identified by the use of immunological techniques. The use of particular monoclonal antibodies, such as IFRN 0067, in the further development of simple, rapid diagnostic tests for flour quality predictions is discussed.
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Affiliation(s)
- G M Brett
- Department of Food Molecular Biochemistry, AFRC Institute of Food Research, Norwich Laboratory, Norwich Research Park, NR4 7UA, Colney, Norwich, UK
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Rechinger KB, Bougri OV, Cameron-Mills V. Evolutionary relationship of the members of the sulphur-rich hordein family revealed by common antigenic determinants. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1993; 85:829-840. [PMID: 24196057 DOI: 10.1007/bf00225026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/1992] [Accepted: 07/08/1992] [Indexed: 06/02/2023]
Abstract
Five monoclonal antibodies raised against an enriched C hordein fraction have been characterized in detail and were found to be specific for the members of the sulphur-rich hordein family. Two antibodies specific for B hordein polypeptides were identified, one of which reacted predominantly with CNBr cleavage class III polypeptides. γ1 hordein was recognized by two antibodies, of which one also reacted with γ2 hordein and several members of the CNBr cleavage class II B hordein polypeptides. One antibody recognized γ3 hordein but cross-reacted at higher antibody concentration with almost all of the B and C hordein polypeptides. The specificity of the monoclonal antibodies was confirmed by Western blotting of one- or two-dimensionally separated hordein from the B hordein-deficient mutant hor2ca and its wild-type Carlsberg II and the γ3 hordein-deficient genotype Nevsky. The identification of the γ hordein-specific monoclonal antibodies was further supported by immune precipitation of in-vitro transcribed and translated γ2 hordein, and hor2ca and Carlsberg II mRNA translation products. The monoclonal antibodies were used to screen for mutants in γ hordein synthesis. Two mutants, one deficient in γ 1 hordein synthesis and a second in γ 2 or closely related B hordein polypeptides were identified. A model is proposed for the evolution of the sulphur-rich hordein loci Hor5 and Hor2.
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Affiliation(s)
- K B Rechinger
- Department of Physiology, Carlsberg Laboratory, Gamle Carlsbergvej 10, DK-2500, Copenhagen Valby, Denmark
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Gupta RB, Shepherd KW. Production of multiple wheat-rye 1RS translocation stocks and genetic analysis of LMW subunits of glutenin and gliadins in wheats using these stocks. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1993; 85:719-728. [PMID: 24196042 DOI: 10.1007/bf00225011] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/1992] [Accepted: 05/20/1992] [Indexed: 06/02/2023]
Abstract
A triple (1AL.1RS/1BL.1RS/1DL.1RS) and three double (1AL.1RS/1BL.1RS, 1AL.1RS/1DL.1RS, 1BL.1RS/1DL.1RS) wheat-rye 1RS translocation stocks were isolated from a segregating population using the Gli-1, Tri-1 and Sec-1 seed proteins as genetic markers. These stocks carried 42 chromosomes and formed the expected multivalents (frequency of 14-25%) at metaphase 1. They gave floret fertility ranging from 40-60%. These stocks were subsequently used to determine the genetic control of low-molecular-weight (LMW) glutenin subunits in 'Chinese Spring' and 'Gabo' by means of two-step one-dimensional SDS-PAGE. All of the B subunits and most of the C subunits of glutenin were shown to be controlled by genes on the short arms of group-1 chromosomes in these wheats. The other C subunits were not controlled by group-1 chromosomes. The triple translocation line served as a suitable third parent in producing test-cross seeds for studying the inheritance of the LMW glutenin subunits and gliadins in wheat cultivars, e.g. 'Chinese Spring' and 'Orca'. The segregation patterns of the LMW glutenin subunits in these cultivars revealed that the subunits were inherited in clusters and that their controlling genes (Glu-3) were tightly linked with those controlling gliadins (Gli-1). The LMW glutenin patterns d, d and e in 'Orca' segregated as alternatives to the patterns a, a and a in 'Chinese Spring' controlled by Glu-A3, Glu-B3 and Glu-D3 loci on chromosome arms 1AS, 1BS and 1DS, respectively, thus indicating that these patterns were controlled by allelic genes at these loci.
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Affiliation(s)
- R B Gupta
- Department of Plant Science, Waite campus, University of Adelaide, 5064, Glen Osmond, S.A., Australia
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