Malus xiaojinensis MxVHA-c protein and coding gene thereof, and application thereof
A technology that encodes genes and proteins, applied in applications, genetic engineering, plant genetic improvement, etc., can solve problems such as photosynthesis decline, crop yield and quality decline, premature aging, etc.
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Embodiment 1
[0047] Example 1, the acquisition of the protein MxVHA-c related to plant resistance to iron deficiency and its coding gene
[0048] 1. Obtaining the full length of the MxVHA-c gene
[0049] Take Malus xiaojinensis (Malus xiaojinensis) (the public can obtain from China Agricultural University, the non-patent literature that has recorded this Malus xiaojinensis is: Cheng Minghao, Li Xiaolin, Zhang Yungui, Excellent rootstock resources for apples-Malus xiaojinensis, Journal of Southwest Agricultural University, 2000 October, 22 (5): 383-386) was used as the experimental material, the total RNA of the leaves was extracted, and it was reverse transcribed into cDNA. Using this cDNA as a template, using primer F1 (sequence 3 in the sequence listing) and primer R1 (sequence 4 in the sequence listing) as a primer pair:
[0050] Primer F1: AAA GAATTC ATGTCTTTCTTCAACCTTC, the underlined part indicates the enzyme cutting site EcoRI,
[0051] Primer R1: AAA GTC GAC CCCTCAGCTCTTGACTG...
experiment example 2
[0089] Experimental example 2, the acquisition of transgenic yeast and the analysis of its resistance to heavy metal toxicity
[0090] 1. Transform yeast with the cloned MxVHA-c gene
[0091] The plasmids of pEZS-MxVHA-c, pEZS-NL and yeast expression vector pYES2.0 (Beijing Dingguo Changsheng Biotechnology Co., Ltd.) were digested with EcoRI and XbaI respectively, and the 1218bp MxVHA-c-GFP was obtained respectively. and 720bp GFP were connected to pYES2.0 after enzyme digestion to obtain recombinant expression vectors pYES2.0-MxVHA-c-GFP and pYES2.0-GFP, the latter can be used as a positive control.
[0092] The recombinant expression vectors pYES2.0-MxVHA-c-GFP and pYES2.0-GFP were transformed into Escherichia coli competent cells, the plasmids were extracted, digested with EcoRI and XbaI, and detected by agarose gel electrophoresis to obtain MxVHA-c of about 498bp Gene fragment. The result is as Figure 5As shown, the lane M is the DNA molecular weight standard of DL1500...
Embodiment 3
[0100] Embodiment 3, the acquisition and identification of transgenic plants
[0101] 1. Construction of recombinant expression vector
[0102] 1. Digest the transient expression vector pEZS-MxVHA-c with restriction endonucleases EcoRI and XbaI, and recover the digested product (about 1218bp).
[0103] 2. Design primers F3 and R3 with EcoRI and KpnI at both ends according to the sequence of the 35S promoter. The enzyme-cut transient expression vector pEZS-MxVHA-c was used as a template, and the primer pair composed of F3 and R3 was used for PCR amplification, and about 1000bp PCR amplification product was recovered.
[0104] F3: 5'-CCGGAATTCCAATCCCCACCAAAACCTGA-3';
[0105] R3: 5'-TTCGAGCTCCGTGTCCTTCCAAATGAAA-3'.
[0106] 3. Digest the PCR amplified product of step 2 with restriction endonucleases EcoRI and KpnI, and recover the digested product.
[0107] 4. Digest pCAMBIA2300 plasmid (Beijing Dingguo Changsheng Biotechnology Co., Ltd.) with restriction enzymes EcoRI and K...
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