1
|
Zheng L, Zhao DG. Cloning and functional characterization of the legumin A gene (EuLEGA) from Eucommia ulmoides Oliver. Sci Rep 2024; 14:14111. [PMID: 38898092 PMCID: PMC11187137 DOI: 10.1038/s41598-024-65020-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 06/16/2024] [Indexed: 06/21/2024] Open
Abstract
Legumin A is a seed storage protein that provides nutrients for seed germination. The purpose of this study was to describe the structure and expression pattern of the EuLEGA gene in Eucommia ulmoides Oliver (E. ulmoides) and to infer its functional role. The 1287 bp coding sequence of the EuLEGA CDS of the EuLEGA gene, encoding a protein containing 428 amino acid residues, was cloned. The structure predicted that the protein belonged to the RmlC (deoxythymidine diphosphates, dTDP)-4-dehydrorhamnose 3,5-epimerase)-like cupin conserved domain family, which contains both RmlC, a key enzyme for the synthesis of rhamnose and legumin A. The overexpression (OE) vector of the EuLEGA gene was constructed and genetically transformed into tobacco and E. ulmoides; the RNA interference (RNAi) vector of the EuLEGA gene was constructed and genetically transformed into E. ulmoides; and the contents of legumin A and rhamnose were detected. The results showed that the EuLEGA gene could significantly increase the content of legumin A in transgenic tobacco leaves and transgenic E. ulmoides regenerative buds, and the OE of this gene in E. ulmoides could promote an increase in rhamnose content. RNAi caused a significant decrease in the legumin A content in the regenerated buds of E. ulmoides. These was a significant increase in legumin A in the transgenic tobacco seeds, and these results indicate that the expression of the EuLEGA gene is closely related to the accumulation of legumin A. Subcellular localization studies revealed that EuLEGA is localized to the cytoplasm with the vacuolar membrane. Analysis of the EuLEGA gene expression data revealed that the expression level of the EuLEGA gene in the samaras was significantly greater than that in the leaves and stems. In addition, the study also demonstrated that GA3 can upregulate the expression levels of the EuLEGA gene, while ABA and MeJA can downregulate its expression levels.
Collapse
Affiliation(s)
- Lina Zheng
- The Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, 550025, Guizhou Province, China
| | - De-Gang Zhao
- The Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, 550025, Guizhou Province, China.
- Guizhou Plant Conservation Technology Center, Biotechnology Institute of Guizhou, Guizhou Academy of Agricultural Sciences, Guiyang, 550006, Guizhou Province, China.
| |
Collapse
|
2
|
Liu S, Liu Z, Hou X, Li X. Genetic mapping and functional genomics of soybean seed protein. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2023; 43:29. [PMID: 37313523 PMCID: PMC10248706 DOI: 10.1007/s11032-023-01373-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/25/2023] [Indexed: 06/15/2023]
Abstract
Soybean is an utterly important crop for high-quality meal protein and vegetative oil. Soybean seed protein content has become a key factor in nutrients for livestock feed as well as human dietary consumption. Genetic improvement of soybean seed protein is highly desired to meet the demands of rapidly growing world population. Molecular mapping and genomic analysis in soybean have identified many quantitative trait loci (QTL) underlying seed protein content control. Exploring the mechanisms of seed storage protein regulation will be helpful to achieve the improvement of protein content. However, the practice of breeding higher protein soybean is challenging because soybean seed protein is negatively correlated with seed oil content and yield. To overcome the limitation of such inverse relationship, deeper insights into the property and genetic control of seed protein are required. Recent advances of soybean genomics have strongly enhanced the understandings for molecular mechanisms of soybean with better seed quality. Here, we review the research progress in the genetic characteristics of soybean storage protein, and up-to-date advances of molecular mappings and genomics of soybean protein. The key factors underlying the mechanisms of the negative correlation between protein and oil in soybean seeds are elaborated. We also briefly discuss the future prospects of breaking the bottleneck of the negative correlation to develop high protein soybean without penalty of oil and yield. Supplementary Information The online version contains supplementary material available at 10.1007/s11032-023-01373-5.
Collapse
Affiliation(s)
- Shu Liu
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Zhaojun Liu
- Heilongjiang Academy of Agricultural Sciences, Harbin, 150086 China
| | - Xingliang Hou
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650 China
- Hainan Yazhou Bay Seed Laboratory, Sanya, 572025 China
| | - Xiaoming Li
- Guangdong Provincial Key Laboratory of Applied Botany & Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650 China
- Hainan Yazhou Bay Seed Laboratory, Sanya, 572025 China
| |
Collapse
|
3
|
Yang J, Xun H, Niu L, He H, Cheng Y, Zhong X, Zhao Q, Xing G, Liu J, Yang X. Elastin-like polypeptide and γ-zein fusions significantly increase recombinant protein accumulation in soybean seeds. Transgenic Res 2021; 30:675-686. [PMID: 33963986 DOI: 10.1007/s11248-021-00258-7] [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: 10/09/2020] [Accepted: 05/03/2021] [Indexed: 11/30/2022]
Abstract
Soybean seeds are an ideal host for the production of recombinant proteins because of their high content of proteins, long-term stability of seed proteins under ambient conditions, and easy establishment of efficient purification protocols. In this study, a polypeptide fusion strategy was applied to explore the capacity of elastin-like polypeptide (ELP) and γ-zein fusions in increasing the accumulation of the recombinant protein in soybean seeds. Transgenic soybean plants were generated to express the γ-zein- or ELP-fused green fluorescent protein (GFP) under the control of the soybean seed-specific promoter of β-conglycinin alpha subunit (BCSP). Significant differences were observed in the accumulation of zein-GFP and GFP-ELP from that of the unfused GFP in transgenic soybean seeds based on the total soluble protein (TSP), despite the low-copy of T-DNA insertions and similar expression at the mRNA levels in selected transgenic lines. The average levels of zein-GFP and GFP-ELP accumulated in immature seeds of these transgenic lines were 0.99% and 0.29% TSP, respectively, compared with 0.07% TSP of the unfused GFP. In mature soybean seeds, the accumulation of zein-GFP and GFP-ELP proteins was 1.8% and 0.84% TSP, an increase of 3.91- and 1.82-fold, respectively, in comparison with that of the unfused GFP (0.46% TSP). Confocal laser scanning analysis showed that both zein-GFP and GFP-ELP were abundantly deposited in many small spherical particles of transgenic seeds, while there were fewer such florescence signals in the same cellular compartments of the unfused GFP-expressing seeds. Despite increased recombinant protein accumulation, there were no significant changes in the total protein and oil content in seeds between the transgenic and non-transformed plants, suggesting the possible presence of threshold limits of total protein accumulation in transgenic soybean seeds. Overall, our results indicate that γ-zein and ELP fusions significantly increased the accumulation of the recombinant protein, but exhibited no significant influence on the total protein and oil content in soybean seeds.
Collapse
Affiliation(s)
- Jing Yang
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - HongWei Xun
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Lu Niu
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Hongli He
- Jilin Normal University, Siping, 136000, China
| | | | - Xiaofang Zhong
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Qianqian Zhao
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Guojie Xing
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | | | - Xiangdong Yang
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, 130033, China.
| |
Collapse
|
4
|
Yang J, Xing G, Niu L, He H, Guo D, Du Q, Qian X, Yao Y, Li H, Zhong X, Yang X. Improved oil quality in transgenic soybean seeds by RNAi-mediated knockdown of GmFAD2-1B. Transgenic Res 2018; 27:155-166. [PMID: 29476327 DOI: 10.1007/s11248-018-0063-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 02/01/2018] [Indexed: 10/18/2022]
Abstract
Soybean oil contains approximately 20% oleic acid and 63% polyunsaturated fatty acids, which limits its uses in food products and industrial applications because of its poor oxidative stability. Increasing the oleic acid content in soybean seeds provides improved oxidative stability and is also beneficial to human health. Endoplasmic reticulum-associated delta-12 fatty acid desaturase 2 (FAD2) is the key enzyme responsible for converting oleic acid (18:1) precursors to linoleic acid (18:2) in the lipid biosynthetic pathway. In this study, a 390-bp conserved sequence of GmFAD2-1B was used to trigger a fragment of RNAi-mediated gene knockdown, and a seed-specific promoter of the β-conglycinin alpha subunit gene was employed to downregulate the expression of this gene in soybean seeds to increase the oleic acid content. PCR and Southern blot analysis showed that the T-DNA had inserted into the soybean genome and was stably inherited by the progeny. In addition, the expression analysis indicated that GmFAD2-1B was significantly downregulated in the seeds by RNAi-mediated post-transcription gene knockdown driven by the seed-specific promoter. The oleic acid content significantly increased from 20 to ~ 80% in the transgenic seeds, and the linoleic and linolenic acid content decreased concomitantly in the transgenic lines compared with that in the wild types. The fatty acid profiles also exhibited steady changes in three consecutive generations. However, the total protein and oil contents and agronomic traits of the transgenic lines did not show a significant difference compared with the wild types.
Collapse
Affiliation(s)
- Jing Yang
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Guojie Xing
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Lu Niu
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Hongli He
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Dongquan Guo
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Qian Du
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Xueyan Qian
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Yao Yao
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Haiyun Li
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Xiaofang Zhong
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China.
| | - Xiangdong Yang
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China.
| |
Collapse
|
5
|
O'Keefe BR, Murad AM, Vianna GR, Ramessar K, Saucedo CJ, Wilson J, Buckheit KW, da Cunha NB, Araújo ACG, Lacorte CC, Madeira L, McMahon JB, Rech EL. Engineering soya bean seeds as a scalable platform to produce cyanovirin-N, a non-ARV microbicide against HIV. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:884-92. [PMID: 25572960 PMCID: PMC4529388 DOI: 10.1111/pbi.12309] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 10/04/2014] [Accepted: 11/06/2014] [Indexed: 05/03/2023]
Abstract
There is an urgent need to provide effective anti-HIV microbicides to resource-poor areas worldwide. Some of the most promising microbicide candidates are biotherapeutics targeting viral entry. To provide biotherapeutics to poorer areas, it is vital to reduce the cost. Here, we report the production of biologically active recombinant cyanovirin-N (rCV-N), an antiviral protein, in genetically engineered soya bean seeds. Pure, biologically active rCV-N was isolated with a yield of 350 μg/g of dry seed weight. The observed amino acid sequence of rCV-N matched the expected sequence of native CV-N, as did the mass of rCV-N (11 009 Da). Purified rCV-N from soya is active in anti-HIV assays with an EC50 of 0.82-2.7 nM (compared to 0.45-1.8 nM for E. coli-produced CV-N). Standard industrial processing of soya bean seeds to harvest soya bean oil does not diminish the antiviral activity of recovered rCV-N, allowing the use of industrial soya bean processing to generate both soya bean oil and a recombinant protein for anti-HIV microbicide development.
Collapse
Affiliation(s)
- Barry R O'Keefe
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, USA
| | - André M Murad
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| | - Giovanni R Vianna
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| | - Koreen Ramessar
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, USA
| | - Carrie J Saucedo
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, USA
- Leidos, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Jennifer Wilson
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, USA
| | | | - Nicolau B da Cunha
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| | - Ana Claudia G Araújo
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| | - Cristiano C Lacorte
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| | - Luisa Madeira
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
- Division of Clinical Sciences, St. George's, University of London, London, UK
| | - James B McMahon
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, USA
| | - Elibio L Rech
- EMBRAPA Genetic Resources and Biotechnology, Laboratory of Synthetic Biology, Brasília, DF, Brazil
| |
Collapse
|
6
|
Yoshino M, Tsutsumi K, Kanazawa A. Profiles of embryonic nuclear protein binding to the proximal promoter region of the soybean β-conglycinin α subunit gene. PLANT BIOLOGY (STUTTGART, GERMANY) 2015; 17:147-52. [PMID: 24943483 DOI: 10.1111/plb.12218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 05/02/2014] [Indexed: 06/03/2023]
Abstract
β-Conglycinin, a major component of seed storage protein in soybean, comprises three subunits: α, α' and β. The expression of genes for these subunits is strictly controlled during embryogenesis. The proximal promoter region up to 245 bp upstream of the transcription start site of the α subunit gene sufficiently confers spatial and temporal control of transcription in embryos. Here, the binding profile of nuclear proteins in the proximal promoter region of the α subunit gene was analysed. DNase I footprinting analysis indicated binding of proteins to the RY element and DNA regions including box I, a region conserved in cognate gene promoters. An electrophoretic mobility shift assay (EMSA) using different portions of box I as a probe revealed that multiple portions of box I bind to nuclear proteins. In addition, an EMSA using nuclear proteins extracted from embryos at different developmental stages indicated that the levels of major DNA-protein complexes on box I increased during embryo maturation. These results are consistent with the notion that box I is important for the transcriptional control of seed storage protein genes. Furthermore, the present data suggest that nuclear proteins bind to novel motifs in box I including 5'-TCAATT-3' rather than to predicted cis-regulatory elements.
Collapse
Affiliation(s)
- M Yoshino
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | | | | |
Collapse
|
7
|
Changes in oleic Acid content of transgenic soybeans by antisense RNA mediated posttranscriptional gene silencing. Int J Genomics 2014; 2014:921950. [PMID: 25197629 PMCID: PMC4147191 DOI: 10.1155/2014/921950] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/10/2014] [Accepted: 07/21/2014] [Indexed: 11/22/2022] Open
Abstract
The Delta-12 oleate desaturase gene (FAD2-1), which converts oleic acid into linoleic acid, is the key enzyme determining the fatty acid composition of seed oil. In this study, we inhibited the expression of endogenous Delta-12 oleate desaturase GmFad2-1b gene by using antisense RNA in soybean Williams 82. By employing the soybean cotyledonary-node method, a part of the cDNA of soybean GmFad2-1b 801 bp was cloned for the construction of a pCAMBIA3300 vector under the soybean seed promoter BCSP. Leaf painting, LibertyLink strip, PCR, Southern blot, qRT-PCR, and fatty acid analysis were used to detect the insertion and expression of GmFad2-1b in the transgenic soybean lines. The results indicate that the metabolically engineered plants exhibited a significant increase in oleic acid (up to 51.71%) and a reduction in palmitic acid (to <3%) in their seed oil content. No structural differences were observed between the fatty acids of the transgenic and the nontransgenic oil extracts.
Collapse
|
8
|
Zhang Y, Schernthaner J, Labbé N, Hefford MA, Zhao J, Simmonds DH. Improved protein quality in transgenic soybean expressing a de novo synthetic protein, MB-16. Transgenic Res 2014; 23:455-67. [PMID: 24435987 DOI: 10.1007/s11248-013-9777-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 12/16/2013] [Indexed: 11/28/2022]
Abstract
To improve soybean [Glycine max (L.) Merrill] seed nutritional quality, a synthetic gene, MB-16 was introduced into the soybean genome to boost seed methionine content. MB-16, an 11 kDa de novo protein enriched in the essential amino acids (EAAs) methionine, threonine, lysine and leucine, was originally developed for expression in rumen bacteria. For efficient seed expression, constructs were designed using the soybean codon bias, with and without the KDEL ER retention sequence, and β-conglycinin or cruciferin seed specific protein storage promoters. Homozygous lines, with single locus integrations, were identified for several transgenic events. Transgene transmission and MB-16 protein expression were confirmed to the T5 and T7 generations, respectively. Quantitative RT-PCR analysis of developing seed showed that the transcript peaked in growing seed, 5-6 mm long, remained at this peak level to the full-sized green seed and then was significantly reduced in maturing yellow seed. Transformed events carrying constructs with the rumen bacteria codon preference showed the same transcription pattern as those with the soybean codon preference, but the transcript levels were lower at each developmental stage. MB-16 protein levels, as determined by immunoblots, were highest in full-sized green seed but the protein virtually disappeared in mature seed. However, amino acid analysis of mature seed, in the best transgenic line, showed a significant increase of 16.2 and 65.9 % in methionine and cysteine, respectively, as compared to the parent. This indicates that MB-16 elevated the sulfur amino acids, improved the EAA seed profile and confirms that a de novo synthetic gene can enhance the nutritional quality of soybean.
Collapse
Affiliation(s)
- Yunfang Zhang
- Eastern Cereals and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, ON, K1A0C6, Canada
| | | | | | | | | | | |
Collapse
|
9
|
Cunha NB, Murad AM, Cipriano TM, Araújo ACG, Aragão FJL, Leite A, Vianna GR, McPhee TR, Souza GHMF, Waters MJ, Rech EL. Expression of functional recombinant human growth hormone in transgenic soybean seeds. Transgenic Res 2011; 20:811-26. [PMID: 21069461 DOI: 10.1007/s11248-010-9460-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 10/24/2010] [Indexed: 10/18/2022]
Abstract
We produced human growth hormone (hGH), a protein that stimulates growth and cell reproduction, in genetically engineered soybean [Glycine max (L.) Merrill] seeds. Utilising the alpha prime (α') subunit of β-conglycinin tissue-specific promoter from soybean and the α-Coixin signal peptide from Coix lacryma-jobi, we obtained transgenic soybean lines that expressed the mature form of hGH in their seeds. Expression levels of bioactive hGH up to 2.9% of the total soluble seed protein content (corresponding to approximately 9 g kg(-1)) were measured in mature dry soybean seeds. The results of ultrastructural immunocytochemistry assays indicated that the recombinant hGH in seed cotyledonary cells was efficiently directed to protein storage vacuoles. Specific bioassays demonstrated that the hGH expressed in the soybean seeds was fully active. The recombinant hGH protein sequence was confirmed by mass spectrometry characterisation. These results demonstrate that the utilisation of tissue-specific regulatory sequences is an attractive and viable option for achieving high-yield production of recombinant proteins in stable transgenic soybean seeds.
Collapse
Affiliation(s)
- Nicolau B Cunha
- Embrapa Genetic Resources and Biotechnology, Parque Estação Biológica (PqEB), Av. W5 Norte, Brasília, DF, 70770-917, Brazil
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
HIDAYAT MEILINAH, SUJATNO MUCHTAN, SUTADIPURA NUGRAHA, SETIAWAN, FARIED AHMAD. β-Conglycinin Content Obtained from Two Soybean Varieties Using Different Preparation and Extraction Methods. HAYATI JOURNAL OF BIOSCIENCES 2011. [DOI: 10.4308/hjb.18.1.37] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|