Plant glutelin transportation and storage related protein OsNHX5 as well as encoding gene and application of protein
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A technology of gluten and gene, applied in the field of genetic engineering
Active Publication Date: 2017-11-10
NANJING AGRICULTURAL UNIVERSITY
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[0005] NHX proteins play an important role in organisms, and there is no
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Embodiment 1
[0046] Example 1. Discovery of glutenin transport and storage-related proteins and their encoding genes in plant seeds
[0047] 1. Distribution analysis and genetic analysis of mature glutenin content of rice mature glutenin-reducing mutant K67
[0048] In the indica rice variety N22 mutant library, using protein electrophoresis analysis, a strain with reduced mature glutenin content in seeds was screened, and its glutenin precursor was significantly increased compared with the normal type, named K67.
[0049] Compared with N22, the main characteristics of K67 are: the content of mature gluten in the seeds decreased (see figure 1 ), with massive accumulation of proglutenin and a seed opaque phenotype, see figure 2 .
[0050] Transmission electron microscopy of developing endosperm reveals that the type II protein bodies storing mature glutenin in K67 are relatively N22( image 3 A) The size is significantly smaller, and the shape of the type II protein body has also chang...
Embodiment 2
[0086] Embodiment 2, the acquisition and identification of transgenic plants
[0087] 1. Construction of recombinant expression vector
[0088] The OsVps9a gene was obtained by PCR amplification using the genomic DNA of Nipponbare (from the germplasm resource bank of the Rice Institute of Nanjing Agricultural University) as a template. The PCR primer sequences are as follows:
[0095] The above primers are located at 2.2kb upstream and 1.2kb downstream of the gene shown in SEQ ID NO.2, the amplified product contains the promoter part of the gene, and the PCR product is recovered and purified. The PCR product was cloned into the vector pCAMBIA1305 using the INFUSION recombination kit (Takara, Japan).
[0096] INFUSION recombination reaction system (10 μL): 1.0 μL of PCR ...
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Abstract
The invention belongs to the field of genetic engineering and relates to plant glutelin transportation and storage related protein OsNHX5 as well as an encoding gene and an application of the protein. The protein is protein shown in (a) or (b), wherein (a) is protein comprising an amino acid sequence shown in SEQ ID NO.1; (b) is plant glutelin transportation and storage related protein derived from SEQ ID NO.1 through substitution and/or deletion and/or addition of one or several amino acid residues of an amino acid sequence in SEQ ID NO.1. The plant glutelin transportation and storage related protein affects transportation and storage of glutelin precursors in plant endosperm. The encoding gene of the protein is introduced to plants which are abnormal in glutelin transportation and storage, and transgenic plants which are normal in glutelin transportation and storage can be cultured. The protein and the encoding gene thereof can be applied to genetic improvement of plants.
Description
technical field [0001] The invention belongs to the field of genetic engineering and relates to a plant gluten protein transport and storage related protein OsNHX5 and its coding gene and application. Background technique [0002] Rice is one of the most important food crops in the world. The successful application of hybrid rice has largely solved the food problem caused by the rapid increase in the world's population. However, with the continuous improvement of people's living standards, the cultivation of high-quality, high-nutrition and various functional rice is becoming an urgent problem. As the second largest nutrient in rice, rice seed storage protein determines the nutritional value of rice to a large extent. Therefore, the in-depth study of its synthetic transport pathway will help us improve rice through genetic engineering. [0003] Rice glutenin is first synthesized in the endoplasmic reticulum in the form of a 57kDa precursor, correctly folded with the assist...
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