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Cao D, Ye F, Zhao C, Shen J, Liu R, Zhang B, Shen Y, Zhang H, Liu B, Chen W. Molecular characterization and functional properties of avenin-like b gene TuALPb7As in Triticum urartu. BIOTECHNOL BIOTEC EQ 2021. [DOI: 10.1080/13102818.2020.1868332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Dong Cao
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Fahui Ye
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
- Department of Genetics and Developmental Biology, School of Life Sciences, University of Chinese Academy of Sciences, Beijing, PR China
| | - Caixia Zhao
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
- Department of Genetics and Developmental Biology, School of Life Sciences, University of Chinese Academy of Sciences, Beijing, PR China
| | - Jicheng Shen
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Ruijuan Liu
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Bo Zhang
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Yuhu Shen
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Huaigang Zhang
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
- Department of Genetics and Developmental Biology, School of Life Sciences, University of Chinese Academy of Sciences, Beijing, PR China
| | - Baolong Liu
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
| | - Wenjie Chen
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, PR China
- Laboratory of Wheat Quality Improvement, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, PR China
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6
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Jiang P, Wang K, Gao J, Zheng X, Feng J, Ma W, Yan Y, Li X. High-level expression of LMW-GS and α-gliadin genes promoted by the expressed tag sequence of 5' end in Escherichia coli. Protein Expr Purif 2014; 105:54-60. [PMID: 25281897 DOI: 10.1016/j.pep.2014.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 09/12/2014] [Accepted: 09/23/2014] [Indexed: 11/19/2022]
Abstract
Wheat storage protein genes, especially low molecular weight glutenin subunit (LMW-GS) and gliadin genes are difficult to be expressed in Escherichiacoli, mainly due to the presence of highly repetitive sequences. In order to establish a high efficiency expression system for these genes, five different expression plasmids combining with 9 genes, viz. 6 LMW-GS and 3 α-gliadin genes isolated from common wheat and related species, were studied for heterologous expression in E. coli. In this study, when an expressed tag sequence encoding signal peptide, His-S or GST-tag was fused to the 5' end of LMW-GS or gliadin gene as the leading sequence, all recombination genes could be stably expressed at a high level. On the contrast, as expected, the inserted genes encoding mature protein failed without an expressed tag sequence. This result indicated that using expressed tag sequences as leading sequences could promote LMW-GS and gliadin genes to be well expressed in E. coli. Further transcriptional analysis by quantitative real-time PCR (qRT-PCR) showed transcription levels of recombination genes (e.g. GST-Glutenin, His-S-Glutenin and SP(∗)-His-Glutenin) were 4-fold to 33-fold higher than those of the LMW-GS genes, which suggested these expressed tag sequences might play an important role in stimulating transcription. The possible molecular mechanism under this phenomenon was discussed.
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Affiliation(s)
- Peihong Jiang
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Ke Wang
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Jiansheng Gao
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Xiaoran Zheng
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Jianing Feng
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Wujun Ma
- School of Veterinary & Life Sciences, Murdoch University and Australian Export Grains Innovation Centre, Perth, Australia
| | - Yueming Yan
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Xiaohui Li
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China.
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7
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Shen X, Chen MR, Li L, Hu SQ. Expression, Purification, and Functional Analysis of Three Low-Molecular-Weight Glutenin Subunits from Wheat Cultivar Cheyenne. Cereal Chem 2014. [DOI: 10.1094/cchem-11-13-0232-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Xing Shen
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Mei-Rong Chen
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Lin Li
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Song-Qing Hu
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, 510640, China
- Corresponding author. Phone/Fax: +86-20-87113252. E-mail:
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9
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Li J, Wang SL, Cao M, Lv DW, Subburaj S, Li XH, Zeller FJ, Hsam SLK, Yan YM. Cloning, expression, and evolutionary analysis of α-gliadin genes from Triticum and Aegilops genomes. J Appl Genet 2013; 54:157-67. [PMID: 23456845 DOI: 10.1007/s13353-013-0139-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 01/24/2013] [Accepted: 01/25/2013] [Indexed: 01/19/2023]
Abstract
Fifteen novel α-gliadin genes were cloned and sequenced from Triticum and related Aegilops genomes by allele-specific polymerase chain reaction (AS-PCR). Sequence comparison displayed high diversities in the α-gliadin gene family. Four toxic epitopes and glutamine residues in the two polyglutamine domains facilitated these α-gliadins to be assigned to specific chromosomes. Five representative α-gliadin genes were successfully expressed in Escherichia coli, and their amount reached a maximum after 4 h induced by isopropyl-β-D-thiogalactoside (IPTG), indicating a high level of expression under the control of T7 promoter. The transcriptional expression of α-gliadin genes during grain development detected by quantitative real-time polymerase chain reaction (qRT-PCR) showed a similar up-down regulation pattern in different genotypes. A neighbor-joining tree constructed with both full-open reading frame (ORF) α-gliadin genes and pseudogenes further revealed the origin and phylogenetic relationships among Triticum and related Aegilops genomes. The evolutionary analysis demonstrated that α-gliadin genes evolved mainly by synonymous substitutions under strong purifying selection during the evolutionary process.
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Affiliation(s)
- J Li
- College of Life Science, Capital Normal University, 100048, Beijing, China
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11
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Xie Z, Wang C, Wang K, Wang S, Li X, Zhang Z, Ma W, Yan Y. Molecular characterization of the celiac disease epitope domains in α-gliadin genes in Aegilops tauschii and hexaploid wheats (Triticum aestivum L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2010; 121:1239-51. [PMID: 20556595 DOI: 10.1007/s00122-010-1384-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2010] [Accepted: 06/03/2010] [Indexed: 05/24/2023]
Abstract
Nineteen novel full-ORF α-gliadin genes and 32 pseudogenes containing at least one stop codon were cloned and sequenced from three Aegilops tauschii accessions (T15, T43 and T26) and two bread wheat cultivars (Gaocheng 8901 and Zhongyou 9507). Analysis of three typical α-gliadin genes (Gli-At4, Gli-G1 and Gli-Z4) revealed some InDels and a considerable number of SNPs among them. Most of the pseudogenes were resulted from C to T change, leading to the generation of TAG or TAA in-frame stop codon. The putative proteins of both Gli-At3 and Gli-Z7 genes contained an extra cysteine residue in the unique domain II. Analysis of toxic epitodes among 19 deduced α-gliadins demonstrated that 14 of these contained 1-5 T cell stimulatory toxic epitopes while the other 5 did not contain any toxic epitopes. The glutamine residues in two specific ployglutamine domains ranged from 7 to 27, indicating a high variation in length. According to the numbers of 4 T cell stimulatory toxic epitopes and glutamine residues in the two ployglutamine domains among the 19 α-gliadin genes, 2 were assigned to chromosome 6A, 5 to chromosome 6B and 12 to chromosome 6D. These results were consistent with those from wheat cv. Chinese Spring nulli-tetrasomic and phylogenetic analysis. Secondary structure prediction showed that all α-gliadins had high content of β-strands and most of the α-helixes and β-strands were present in two unique domains. Phylogenetic analysis demonstrated that α-gliadin genes had a high homology with γ-gliadin, B-hordein, and LMW-GS genes and they diverged at approximate 39 MYA. Finally, the five α-gliadin genes were successfully expressed in E. coli, and their expression amount reached to the maximum after 4 h induced by IPTG, indicating that the α-gliadin genes can express in a high level under the control of T(7) promoter.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Celiac Disease/genetics
- Celiac Disease/immunology
- Chromosome Mapping
- Cloning, Molecular
- DNA, Plant/genetics
- Epitopes, T-Lymphocyte/chemistry
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Escherichia coli
- Genes, Plant/genetics
- Genes, Plant/immunology
- Gliadin/chemistry
- Gliadin/genetics
- Gliadin/immunology
- Humans
- INDEL Mutation
- Open Reading Frames
- Peptides
- Phylogeny
- Polymorphism, Single Nucleotide
- Protein Structure, Secondary
- Pseudogenes
- Sequence Alignment
- Sequence Analysis, DNA
- Triticum/genetics
- Triticum/immunology
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Affiliation(s)
- Zhenze Xie
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
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12
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Gao L, Wang A, Li X, Dong K, Wang K, Appels R, Ma W, Yan Y. Wheat quality related differential expressions of albumins and globulins revealed by two-dimensional difference gel electrophoresis (2-D DIGE). J Proteomics 2009; 73:279-96. [PMID: 19815103 DOI: 10.1016/j.jprot.2009.09.014] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2009] [Revised: 09/15/2009] [Accepted: 09/16/2009] [Indexed: 11/28/2022]
Abstract
Comparative proteomics analysis offers a new approach to identify differential proteins among different wheat genotypes and developmental stages. In this study, the non-prolamin expression profiles during grain development of two common or bread wheat cultivars (Triticum aestivum L.), Jing 411 and Sunstate, with different quality properties were analyzed using two-dimensional difference gel electrophoresis (2-D DIGE). Five grain developmental stages during the post-anthesis period were sampled corresponding to the cumulative averages of daily temperatures ( degrees C: 156 degrees C, 250 degrees C, 354 degrees C, 447 degrees C and 749.5 degrees C). More than 400 differential protein spots detected at one or more of the developmental stages of the two cultivars were monitored, among which 230 proteins were identified by MS. Of the identified proteins, more than 85% were enzymes possessing different physiological functions. A total of 36 differential proteins were characterized between the two varieties, which are likely to be related to wheat quality attributes. About one quarter of the proteins identified expressed in multiple spots with different pIs and molecular masses, implying certain post-translational modifications (PTMs) of proteins such as phosphorylations and glycosylations. The results provide new insights into biochemical mechanisms for grain development and quality.
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Affiliation(s)
- Liyan Gao
- Capital Normal University, Beijing, China
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14
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Abstract
Gluten proteins play a key role in determining the unique baking quality of wheat by conferring water absorption capacity, cohesivity, viscosity and elasticity on dough. Gluten proteins can be divided into two main fractions according to their solubility in aqueous alcohols: the soluble gliadins and the insoluble glutenins. Both fractions consist of numerous, partially closely related protein components characterized by high glutamine and proline contents. Gliadins are mainly monomeric proteins with molecular weights (MWs) around 28,000-55,000 and can be classified according to their different primary structures into the alpha/beta-, gamma- and omega-type. Disulphide bonds are either absent or present as intrachain crosslinks. The glutenin fraction comprises aggregated proteins linked by interchain disulphide bonds; they have a varying size ranging from about 500,000 to more than 10 million. After reduction of disulphide bonds, the resulting glutenin subunits show a solubility in aqueous alcohols similar to gliadins. Based on primary structure, glutenin subunits have been divided into the high-molecular-weight (HMW) subunits (MW=67,000-88,000) and low-molecular-weight (LMW) subunits (MW=32,000-35,000). Each gluten protein type consists or two or three different structural domains; one of them contains unique repetitive sequences rich in glutamine and proline. Native glutenins are composed of a backbone formed by HMW subunit polymers and of LMW subunit polymers branched off from HMW subunits. Non-covalent bonds such as hydrogen bonds, ionic bonds and hydrophobic bonds are important for the aggregation of gliadins and glutenins and implicate structure and physical properties of dough.
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Affiliation(s)
- Herbert Wieser
- German Research Centre of Food Chemistry and Hans-Dieter-Belitz-Institute for Cereal Grain Research, D-85748 Garching, Germany.
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