N-acetylneuraminic acid specific biosensor and application thereof
An acetylneuraminic acid and biosensor technology, which is applied in the field of genetic engineering, can solve the problem of lack of key genes of N-acetylneuraminic acid, etc., and achieves the effects of simple construction method, good application prospect and easy use.
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Embodiment 1
[0033] The construction of embodiment 1 recombinant plasmid
[0034]According to the plasmid p43NMK-AGE-NeuB (Zhang XL, Liu YF, Liu L, Wang M, Li JH, Du GC, ChenJ. Modular pathway engineering of key carbon-precursor supply-pathways for improved N-acetylneuraminic acid production in Bacillus subtilis. Biotechnology and bioengineering.2018; 115(9):2217-2231) sequence information, designed primers AGE-NeuB-F: 5'-CCGGGATCCATGGGCAAAAACTTACAAGCTCTGGCCCAGCTTTATAAAAATGCCC-3', AGE-NeuB-R: 5'-TCCCTGGTTTTTAAATTCGCTATGGATGATAAGTTCATCCGGGCAAGTCTT' Plasmid p43NMK-AGE-NeuB is used as a template to amplify N-acetylglucosamine isomerase (AGE) shown in SEQ ID NO.5 and N-acetylneuraminic acid synthase (NeuB) shown in SEQ ID NO.6 ; According to the plasmid pSTOP1622 sequence (SEQ ID NO.8), design vector reverse amplification primers: pSTOP1622-F:5'-GCGAATTTAAAAACCAGGGAGAATAAGGTACCGGCCGCATGCCG-3', pSTOP1622-R:5'-TTTTTGCCCATGGATCCCGGGAGCTCCGGAGATCTTCGAACTAGTTTGGACC-3', use the above primers to plas...
Embodiment 2
[0035] Embodiment 2 Construction of recombinant Bacillus subtilis strain B6S
[0036] The constructed recombinant plasmid pSTOP16220AGE-NeuB was transformed into Bacillus subtilis (Bacillus subtilis 168ΔnagPΔnagPΔgamPΔgamAΔnagAΔnagBΔ1dhΔpta::lox72; Δctc::Gna1). AGE-NeuB-F and AGE-NeuB-R were used for colony PCR, and a 2233bp band appeared, verifying that the recombinant Bacillus subtilis B6S was successfully constructed.
Embodiment 3
[0037] Example 3 Construction of Biosensor Plasmids
[0038] According to the sequence information of E. coli (Escherichia coli K12), design primers NanR-F: 5'-CGCAGGCGTTTTGTAATAAATTATTTCTTTTTGTTGGTGGTCTGACCGAAAGCGT-3', NanR-R: 5'-TGGGATTGATAGAATATGACATGGGCCTTATGAACGC-3', use the above primers to amplify NanR with E. coli K12 as a template Gene; according to the sequence of Bacillus subtilis (Bacillus subtilis) 168, primers were designed rapH-F: 5'-GTCATATTCTATCAATCCCAAATTTTGAAAACAATATAGAAGGAAG-3', rapH-R: 5'-TCATCCTATTCCTTGATCCTGTTTAAGGGG-3', phbs-F: 5'-AGGATCAAGGAATAGGATGAAAAAAGGAAAAAAAGGAATATTCGTTCG , phbs-R: 5'-AGTTCTTCTCCCTTACCCATCCCAAAAGGATACATTCAGTTCGTTTTATTATCATTTCTTCACAGTTCAG-3', using Bacillus subtilis (Bacillus subtilis) 168 as a template to amplify the above promoter; design primers according to the GFP gene sequence, GFP-F: 5'-ATGGGTAAGGGAGAAGAACTTTTCACTGGAGTTGT-3', GFP -R:5'-CCGGCAGTCTGACAAGTTATTTATTTGTATAGTTCATCCATGCCATGTGTAATCCCAGC-3',使用GFP基因为模板扩增后,根据pHT01质粒序列设...
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