Larimichthys crocea interferon regulatory factor IRF3 starter, nucleic acid builder, cell and preparing method and application of larimichthys crocea interferon regulatory factor IRF3 starter
A technology of nucleic acid constructs and regulatory factors, applied in the field of genetic engineering, can solve problems such as lack of research
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Embodiment 1
[0035] Embodiment 1: the cloning of large yellow croaker interferon regulatory factor IRF3 gene promoter
[0036] Based on the following figure 1 process steps.
[0037] Using the large yellow croaker genome (extract the large yellow croaker genome DNA from the large yellow croaker on the market according to the normal genome extraction process) as a template, design primers, and the primer sequence is as follows;
[0038] Forward primer: SEQ ID NO:2; where the underlined line is the KpnI restriction site, and the underlined dotted line is SEQ ID NO:4;
[0039] Reverse primer: SEQ ID NO:3; where the underlined line is the Bgl II restriction site, and the underlined dotted line is SEQ ID NO:5.
[0040] Using TaKaRa ExTaq enzyme, PCR amplifies the promoter of the large yellow croaker interferon regulatory factor IRF3 gene, and the PCR reaction system is as follows:
[0041]
[0042] The PCR reaction conditions are as follows:
[0043]
[0044] The PCR product was det...
Embodiment 2
[0046] Example 2: Construction of the large yellow croaker interferon regulatory factor IRF3 gene promoter recombinant vector pGL4-IRF3-pro
[0047] 1) Expand and cultivate the Top10 strain of the above-mentioned pMD19-T-IRF3-pro recombinant vector, extract the plasmid, and digest the recombinant plasmid with Kpn I / Bgl II, perform agarose gel electrophoresis, and cut the gel for recovery. After the IRF3 promoter;
[0048] 2) Digest the pGL4.17 luciferase reporter vector (promega company) with Kpn I / Bgl II double enzymes and recover the digested vector with a gel recovery kit;
[0049] 3) Use T4 DNA ligase from TaKaRa Company to connect the double-digested IRF3 promoter sequence fragment and the vector pGL4.17 to construct the recombinant vector pGL4-IRF3-pro. The connection system is as follows:
[0050]
[0051] Reaction conditions: Incubate overnight at 16°C;
[0052] 4) Transform the above ligation product into Escherichia coli Top10 competent cells, screen positive cl...
Embodiment 3
[0054] Example 3: Dual-luciferase reporter gene detection system analyzes the activity of the large yellow croaker interferon regulatory factor IRF3 gene promoter
[0055] 1. Inoculate EPC cells in a 24-well cell culture plate, 2×10 per well 5 Add 500 μl of MEM medium to each cell, and culture overnight in a biochemical incubator at 25°C;
[0056] 2. Use Invitrogen’s Lipofectamine for each well of EPC cells TM 3000 transfection reagent co-transfect 100ng of recombinant vector pGL4-IRF3-pro obtained in Example 2 and 10ng Renilla luciferase control reporter gene vector pRL-TK; at the same time, co-transfect 100ng empty vector pGL4.17 and 10ng sea Renal luciferase control The EPC cells of the reporter gene carrier pRL-TK were used as the control; 3 replicates were set for each treatment. The specific steps of cell transfection are as follows:
[0057] a) Mix the vector to be transfected (100ng pGL4-IRF3-pro+10ng pRL-TK or 100ng pGL4.17+10ng pRL-TK) with 25μl Opti-MEM medium (p...
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