Fusion protein of human epidermal growth factor and metallothionein and preparation method and application thereof
A technology of epidermal growth factor and metallothionein, which is applied in the direction of microorganism-based methods, biochemical equipment and methods, chemical instruments and methods, etc., can solve problems such as poor results, reduce the frequency of medication, reduce the amount of medication, and stabilize sex increasing effect
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Embodiment 1
[0040] Synthesis and assembly of embodiment 1 human epidermal growth factor gene
[0041] The entire sequence of the novel human epidermal growth factor fusion protein is artificially designed according to the customary codons of Escherichia coli, and is divided into six oligonucleotides for synthesis (respectively named as EU1, EU2, EU3, ED1, ED2, ED3) (such as figure 1 shown), the base sequence of oligonucleotide EU1 is shown in SEQ ID No: 5, the base sequence of oligonucleotide EU2 is shown in SEQ ID No: 6, and the base sequence of oligonucleotide EU3 is shown in Shown in SEQ ID No: 7, the base sequence of oligonucleotide ED1 is shown in SEQ ID No: 8, the base sequence of oligonucleotide ED2 is shown in SEQ ID No: 9, the base sequence of oligonucleotide ED3 is shown in The base sequence is shown as SEQ ID No: 10, which was synthesized by Shanghai Yingjun Biotechnology Co., Ltd., in which EU1 and ED1 two oligonucleotide chains form a sticky end of EcoR I after annealing, whi...
Embodiment 2
[0043] Example 2 Synthesis and assembly of human metallothionein gene
[0044] According to the human metallothionein (MT1M) sequence (as shown in SEQ ID No: 4) that has been published, its coding gene (as shown in SEQ ID No: 11) is designed using Escherichia coli customary codons, and in the encoding gene An XbaI site was designed at the 5' end, and a Hind III site was designed at its 3' end for cloning. The human metallothionein coding gene entrusted Shanghai Yingjun Biotechnology Company to carry out the whole gene synthesis.
[0045] Shanghai Yingjun Biotechnology Co., Ltd. provided the cloning plasmid with the above-mentioned synthetic human metallothionein coding gene verified by sequencing, and named it pGM01.
Embodiment 3
[0046] The construction of embodiment 3 fusion protein Escherichia coli expression vector
[0047] Inoculate the Escherichia coli strain containing the recombinant plasmid named pGE04, the Escherichia coli strain containing the recombinant plasmid named pGM01, and the Escherichia coli strain containing the Escherichia coli expression vector pBV220 into 10ml LB medium containing ampicillin 50mg / L Medium, 37°C shaking culture overnight, the next day according to Qiagen company plasmid extraction kit manual instructions, respectively, to extract the plasmid. The recombinant plasmid pGE04 was digested with EcoR I and Xba I, the recombinant plasmid containing pGM01 was digested with Xba I and Hind III, and the expression vector pBV220 was digested with EcoR I and Hind III. Specific conditions: 10 μl reaction system, in the system Add 2 μl of plasmid, use 10 activity units of each restriction enzyme (NewEngland Biolabs Company), add 1 μl of 10× buffer, make up with deionized water, ...
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