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Domoney C, Knox M, Moreau C, Ambrose M, Palmer S, Smith P, Christodoulou V, Isaac PG, Hegarty M, Blackmore T, Swain M, Ellis N. Exploiting a fast neutron mutant genetic resource in Pisum sativum (pea) for functional genomics. FUNCTIONAL PLANT BIOLOGY : FPB 2013; 40:1261-1270. [PMID: 32481193 DOI: 10.1071/fp13147] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 07/18/2013] [Indexed: 06/11/2023]
Abstract
A fast neutron (FN)-mutagenised population was generated in Pisum sativum L. (pea) to enable the identification and isolation of genes underlying traits and processes. Studies of several phenotypic traits have clearly demonstrated the utility of the resource by associating gene deletions with phenotype followed by functional tests exploiting additional mutant sources, from both induced and natural variant germplasm. For forward genetic screens, next generation sequencing methodologies provide an opportunity for identifying genes associated with deletions rapidly and systematically. The application of rapid reverse genetic screens of the fast neutron mutant pea population supports conclusions on the frequency of deletions based on phenotype alone. These studies also suggest that large deletions affecting one or more loci can be non-deleterious to the pea genome, yielding mutants that could not be obtained by other means. Deletion mutants affecting genes associated with seed metabolism and storage are providing unique opportunities to identify the products of complex and related gene families, and to study the downstream consequences of such deletions.
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Affiliation(s)
- Claire Domoney
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Maggie Knox
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Carol Moreau
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Mike Ambrose
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Sarah Palmer
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Peter Smith
- Wherry and Sons Ltd, The Old School, High Street, Rippingale, Bourne, Lincolnshire PE10 0SR, UK
| | | | - Peter G Isaac
- IDna Genetics Ltd, Norwich Research Park, Norwich NR4 7UH, UK
| | - Matthew Hegarty
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Ceredigion SY23 3EB, UK
| | - Tina Blackmore
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Ceredigion SY23 3EB, UK
| | - Martin Swain
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Ceredigion SY23 3EB, UK
| | - Noel Ellis
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Ceredigion SY23 3EB, UK
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Quiroga A, Martínez EN, Rogniaux H, Geairon A, Añón MC. Amaranth (Amaranthus hypochondriacus) vicilin subunit structure. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:12957-12963. [PMID: 21117690 DOI: 10.1021/jf103296n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The 7S-globulin fraction is a minor component of the amaranth storage proteins. The present work provides new information about this protein. The amaranth 7S-globulin or vicilin presented a sedimentation coefficient of 8.6 ± 0.6 S and was composed of main subunits of 66, 52, 38, and 16 kDa. On the basis of mass spectrometry (MS) analysis of tryptic fragments, the 52, 38, and 16 kDa subunits presented sequence homology with sesame vicilin, whereas the 66 kDa subunit showed sequence similarity with a putative vicilin. Several characteristics of the 66 kDa subunit were similar to members of the convicilin family. Results support the hypothesis that the 7S-globulin molecules are composed of subunits coming from at least two gene families with primary products of 66 and 52 kDa, respectively. According to the present information, amaranth vicilin may be classified into the vicilin group that includes pea, broad bean, and sesame vicilins, among others.
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Affiliation(s)
- Alejandra Quiroga
- Facultad de Ciencias Exactas, Centro de Investigación y Desarrollo en Criotecnología de Alimentos, Universidad Nacional de La Plata y Consejo Nacional de Investigaciones Científicas y Técnicas, calle 47 y 116, 1900 La Plata, Argentina
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O'Kane FE, Happe RP, Vereijken JM, Gruppen H, van Boekel MAJS. Characterization of pea vicilin. 1. Denoting convicilin as the alpha-subunit of the Pisum vicilin family. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2004; 52:3141-8. [PMID: 15137866 DOI: 10.1021/jf035104i] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Vicilin, a major globulin protein of pea that has been described as "extremely heterogeneous in terms of its polypeptide composition", was extracted from pea flour under alkaline conditions and subsequently fractionated by salt under acid conditions. This procedure induced the separation of vicilin into two fractions, which, after purification, were called vicilin 1 degrees and vicilin 2 degrees. Vicilin 2 degrees was seen on SDS-PAGE to contain the third globulin protein of pea, convicilin (a band at approximately 70 kDa). Vicilin fractions were thus characterized using gel electrophoresis, differential scanning calorimetry, circular dichroism, and pH-dependent solubility in order to determine whether the convicilin should in fact be considered as a third separate globulin protein of pea. On the basis of the results obtained it was concluded that this distinct polypeptide of the Pisum vicilin gene family should be further denoted as a subunit of the salt extractable protein vicilin. The definition of vicilin heterogeneity should therefore be extended to acknowledge the possible oligomeric inclusion of the 70 kDa polypeptide that is here denoted as the alpha-subunit.
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Affiliation(s)
- Francesca E O'Kane
- Product Design and Quality Management Group, Centre for Protein Technology TNO-WU, and Laboratory of Food Chemistry, Wageningen University, Wageningen, The Netherlands
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Bezerra IC, Castro LA, Neshich G, de Almeida ER, de Sá MF, Mello LV, Monte-Neshich DC. A corm-specific gene encodes tarin, a major globulin of taro (Colocasia esculenta L. Schott). PLANT MOLECULAR BIOLOGY 1995; 28:137-144. [PMID: 7787178 DOI: 10.1007/bf00042045] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A gene encoding a globulin from a major taro (Colocasia esculenta L. Schott) corm protein family, tarin (G1, ca. 28 kDa) was isolated from a lambda Charon 35 library, using a cDNA derived from a highly abundant corm-specific mRNA, as probe. The gene, named tar1, and the corresponding cDNA were characterized and compared. No introns were found. The major transcription start site was determined by primer extension analysis. The gene has an open reading frame (ORF) of 765 bp, and the deduced amino acid sequence indicated a precursor polypeptide of 255 residues that is post-translationally processed into two subunits of about 12.5 kDa each. The deduced protein is 45% homologous to curculin, a sweet-tasting protein found in the fruit pulp of Curculigo latifolia and 40% homologous to a mannose-binding lectin from Galanthus nivalis. Significant similarity was also found at the nucleic acid sequence level with genes encoding lectins from plant species of the Amaryllidaceae and Lilliaceae families.
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Affiliation(s)
- I C Bezerra
- EMBRAPA/National Center of Genetic Resource and Biotechnology, SAIN Parque Rural, Brasília, DF, Brazil
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