Rodriguez?A,Saiz?JC,Novella?IS,Andreu?D,Sobrino?F.Antigenic?specificity?ofporcine?T?cell?response?against?foot-and-mouth?disease?virus?structural?proteins:identification?of?T?helper?epitopes?in?VP1.Virology.1994?Nov?15;205(1):24-33.Strohmaier?K,Franze?R,Adam?KH.Location?and?characterization?of?the?antigenicportion?of?the?FMDV?immunizing?protein.J?Gen?Virol.1982Apr;59(Pt?2):295-306.
The specific embodiment
In the context of the present invention, employed term generally has the implication of those of ordinary skill in the art's common sense unless otherwise indicated.Especially, following term has following implication:
Recombinant protein vaccine: be to utilize molecule clone technology, the gene clone that coding is had immunogenic albumen or polypeptide is on protokaryon or eukaryotic expression vector, have immunogenic protein or polypeptide with this carrier what antibacterial or eukaryotic cell (yeast cells or mammalian cell) were produced, this protein or polypeptide can stimulate body (human or animal) that specific humoral immunoresponse(HI) and/or cellullar immunologic response take place after being applied to body.If on protokaryon or eukaryotic expression vector, is recombinant protein vaccine with antiviral such as hoof-and-mouth disease toxic action in antibacterial or eukaryotic cell (yeast cells or mammalian cell) production by viral gene encoded protein matter or polypeptide with it with the gene clone with immunogenic albumen or polypeptide of virus as foot-and-mouth disease virus gene coding.This vaccine can induce body that specific humoral immunoresponse(HI) and/or cellullar immunologic response take place after being applied to animal, prevents the infection that virus causes as foot and mouth disease virus.
The foot and mouth disease virus of animal (FMDV) infects: be the contagious disease of being suffered from altogether by the cloven-hoofed animal that FMDV causes.FMDV is a kind of RNA viruses, and its genome comprises 7500-8000 base approximately.FMDV mainly propagates in the mode of saliva, and the speed of propagation is very fast, easily causes large-area popular.Cattle, pig, sheep, deer etc. are the infection animal of foot and mouth disease virus.
Foot and mouth disease virus VP1 antigen: be the part of FMD virus coat protein, it can induce body to produce the foot and mouth disease virus neutralizing antibody with protective effect.
Foot and mouth disease virus VP1 peptide section comprises foot and mouth disease virus VP1BT1 fusogenic peptide and foot and mouth disease virus VP1BT2 fusogenic peptide
Foot and mouth disease virus VP1BT1 fusogenic peptide is meant the polypeptide with aminoacid sequence shown in SEQ ID NO 2.
GGVSNVRGDLQVLAQKAERALPGGEENYGGETQVQRRQHTDISFILDRFVKVTP(SEQ?ID?NO?2)。
Foot and mouth disease virus VP1 BT2 fusogenic peptide is meant to have and is meant the polypeptide with aminoacid sequence shown in SEQ ID NO 4.
The peptide section of GGVSNVRGDLQVLAQKAKRALPGGPSDARHKQKIVAPAKQLLNFDL (SEQ ID NO4) aminoacid sequence.
2 peptides that 2 polyglycines are made up of 2 adjacent glycine.
Foot and mouth disease virus VP1 peptide section fusion rotein encoding gene is meant the DNA with the nucleotide sequence shown in SEQ ID NO5, and its encoded protein matter is foot and mouth disease virus VP1 peptide section fusion rotein.
Recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine encoding gene has the nucleotide sequence shown in SEQ ID NO8, its encoded protein matter is the recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine or the group foot and mouth disease virus VP1 fusion rotein of weighing, and it has the aminoacid sequence shown in SEQ ID NO 9.
The invention provides a kind of recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine, it is that foot and mouth disease virus VP1 peptide section, 2 polyglycines, 6 polyhistidyl encoding genes are merged, at the recombination fusion protein of escherichia coli production.Recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine of the present invention has the aminoacid sequence shown in nucleotide sequence shown in the SEQ ID NO8 and the SEQ ID NO9.
Foot and mouth disease virus VP1BT1 fusogenic peptide in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the aminoacid sequence shown in nucleotide sequence shown in the SEQ IDNO:1 and the SEQ ID NO2.
Foot and mouth disease virus VP1BT2 fusogenic peptide in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the aminoacid sequence shown in nucleotide sequence shown in the SEQ IDNO:3 and the SEQ ID NO 4.
Foot and mouth disease virus VP1 peptide section fusion rotein encoding gene in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the nucleotide sequence shown in SEQ ID NO 5, and its encoded protein matter is foot and mouth disease virus VP1 peptide section fusion rotein.
Foot and mouth disease virus VP1BT1 fusogenic peptide in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the connected mode shown in the SEQ IDNO:2, comprises existence, connected mode and the position of 2 polyglycines.
Foot and mouth disease virus VP1BT2 fusogenic peptide in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the connected mode shown in the SEQ IDNO:4, comprises existence, connected mode and the position of 2 polyglycines.
Foot and mouth disease virus VP1 peptide section fusion rotein in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention has the connected mode shown in SEQID NO:5.
There is the sequence of 6 polyhistidyls the both sides of the foot and mouth disease virus VP1 peptide section fusion rotein in the recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention.
Recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention adopts escherichia coli to produce.
Recombined foot-and-mouth disease virus VP1 fusion rotein provided by the invention can bring out the neutrality antibody of body generation at foot and mouth disease virus after being applied to animal, have the biologic activity of the infection of prevention animal foot and mouth disease virus.
The invention still further relates to this genetic engineering recombiant protein and be used for preventing purposes of vaccine product of infection of animal foot and mouth disease virus and the vaccine product that contains this genetic engineering recombiant protein in preparation.It will be appreciated by persons skilled in the art that these vaccine products can prepare with the known various conventional methods in this area.
Recombinant protein vaccine of the present invention can be given animal inoculation by hypodermic mode, and the dosage of inoculation is 100-5000 μ g.For stiffening effect, can carry out 1 time booster immunization in 14 or 21 days in the immunity back first time.
Below in conjunction with concrete preparation embodiment and biology effect embodiment, and the present invention is described in further detail with reference to accompanying drawing.Should be understood that these embodiment just in order to demonstrate the invention, but not limit the scope of the invention by any way.
Embodiment
In following embodiment, various processes of Xiang Ximiaoshuing and method are not conventional methods as known in the art, for example Molecular Cloning one book (J.Sambrook, Cold Spring Harbor Laboratory Press, Molecularcloning, 1989) described method.
Embodiment 1, synthetic VP1BT1 fusogenic peptide encoding gene
Adopt the synthetic VP1 BT1 fusogenic peptide encoding gene of PCR method.Designed and synthesized PCR primer with following sequence:
Primer 1: ' CTGCAAGTACTGGCTCAAAAAGCAGAACGTGCTCTGCCGGGTGGCGAAGAAAACTA CGGTGGT3 '
Primer 2: 5 ' TGAAGGAGATGTCAGTGTGCTGACGACGCTGAACCTGAGTTTCACCACCGTAGTTT TCTTCGCC3 '
Primer 3:5 ' GAATTCAGATCTGGCGGTGTATCTAACGTACGTGGTGACCTGCAAGTACTGGCTCA A3 '
Primer 4:5 ' AAGCTTCCCGGAGTAACTTTAACGAAACGGTCCAGGATGAAGGAGATGTCAGTGTG 3 '
Adopt primer 1,2 synthetic dna fragmentation (fragment 1,2) with following sequence:
CTGCAAGTAC?TGGCTCAAAA?AGCAGAACGT?GCTCTGCCGG?GTGGCGAAGA?AAACTACGGT?GGTGAAACTC
AGGTTCAGCG?TCGTCAGCAC?ACTGACATCT?CCTTCA
For touching plate, adopt the VP1 BT1 fusogenic peptide encoding gene at primer 3,4 synthetic band restricted enzyme point of contacts, both sides with fragment 1,2, (SEQ ID NO:1) is as follows for its sequence:
GAATTCAGAT?CTGGCGGTGT?ATCTAACGTA?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCAGAACGTG
CTCTGCCGGG?TGGCGAAGAA?AACTACGGTG?GTGAAACTCA?GGTTCAGCGT?CGTCAGCACA?CTGACATCTC
CTTCATCCTG?GACCGTTTCG?TTAAAGTTAC?TCCGGGATCC
AAGCTT
The PCR operation sequence that adopts is:
In one 500 μ l microcentrifugal tubes, add following reagent:
10 * PCR buffer, 5 μ l
(500mmol/L?KCl,100mmol/L?Tris-Cl,
15mmol/L?MgCl
2)
dNTPs(10mmol/L) 1μl
5 ' end and 3 ' each 0.5 μ l of end primer (0.01mmol/L)
Taq archaeal dna polymerase (5u/ μ l) 0.25 μ l
Add deionized water to final volume 50 μ l
Mix the back and add 3 in mineral oil
Reaction condition: 94 ℃, 30 "; 55 ℃, 1 '; 72 ℃, behind 2 ', 30 cycle periods, 72 ℃ were extended 10 minutes.
The PCR product is done 2% agarose gel electrophoresis (1xTAE, 150-200mA, 0.5 hour).Adopt the DNA of Beijing ancient cooking vessel state company to reclaim the test kit recovery synthetic VP1 BT1 of PCR fusogenic peptide encoding gene dna fragmentation.Downcut the gel that contains dna fragmentation from agarose gel, put into a centrifuge tube.Add the sol solutions (Beijing ancient cooking vessel state company) of 3 times of volumes, 45-55 ℃ of water-bath 5-10min melts glue fully.Add 10ul glass milk (Beijing ancient cooking vessel state company), flick pipe end mixing, then at 45-55 ℃ of water-bath 5-10min, during every 2-3min mixing once.Centrifugal 60 seconds of 5000g abandons supernatant.Add the 400ul rinsing liquid, flick pipe end mixing glass milk, the same then centrifugal, abandon supernatant.Add the 400ul rinsing liquid again, flick pipe end mixing glass milk, the same then centrifugal supernatant of abandoning, and with the sample injector Ex-all rinsing liquid of trying one's best.Room temperature is dried glass milk then.Add 10-30 μ l aseptic double-distilled water glass milk suspended, 45-55 ℃ water-bath 5-10 minute.The centrifugal 2min of 10000g, it is standby to reclaim supernatant (containing VP1 BT1 fusogenic peptide encoding gene dna fragmentation).
VP1 BT1 fusogenic peptide encoding gene dna fragmentation is cloned into pMD18-T Vect plasmid (TakaRa company).
The coupled reaction system:
VP1 BT1 fusogenic peptide encoding gene dna fragmentation (sequence is referring to SEQ ID NO:1) 0.05-0.3pmol
PMD18-T Vect (TakaRa company) 0.5-1 μ l
Solution I (TakaRa company) 5 μ l
Distilled water adds together to 10 μ l
16 ℃ were reacted 1 hour
There is the pMD18-T Vect plasmid of VP1 BT1 fusogenic peptide encoding gene dna fragmentation to be transformed into e. coli jm109 (Novagen company) clone.
The preparation method of competence e. coli jm109 cell is: get an e. coli jm109 list bacterium colony in 2ml LB culture medium, 37 ℃, the concussion of 225rpm speed was cultivated 12-16 hour; Get the above-mentioned culture of 1ml and be inoculated in the 100ml LB culture medium, 37 ℃ of C, it is about 0.5 (about 3 hours) that the speed concussion of 225rpm is cultivated until the OD value; With bacterium liquid ice bath 2 hours, 2,500 * g then collected thalline in centrifugal 20 minutes for 4 ℃; The Trituration buffer that adding 100ml is ice-cold (100mmol/LCaCl2,70mmol/L MgCl2, the 40mmol/L sodium acetate, pH5.5), mixing was put 45 minutes on ice; 1,800 * g, 4 ℃ centrifugal 10 minutes, abandon supernatant, add the ice-cold Trituration buffer suspension cell of 10ml; By every part 200 μ l packing, can preserve 1-2 week for 4 ℃.If need long preservation, but glycerol adding to final concentration is 15%, put-70 ℃ standby.
The method that transforms is: 200 μ l competent cells are put on ice melted, add 3 μ l DMSO or beta-mercaptoethanols then, after the mixing, add 2 μ l coupled reaction liquid (containing recombiant plasmid), mixing was put 30 minutes on ice; 42 ℃ 45 seconds, put back to rapidly then in the ice 1-2 minute; Add 2ml LB culture fluid, 37 ℃, the speed of 225rpm is swayed and was cultivated 1 hour; 4,000 * g centrifugal 10 seconds, abandon supernatant, with the resuspended thalline of 200 μ l LB culture fluid; Bacterium liquid is laid on contains on the antibiotic LB agar culture plate, smoothen, room temperature was placed 20-30 minute, was inverted in 37 ℃ of incubators and cultivated 12-16 hour.
Select positive colony, extract plasmid (J.Sambrook, Cold Spring Harbor Laboratory Press, Molecular cloning, 1989).
Embodiment 2, synthetic VP1BT2 fusogenic peptide encoding gene
Adopt the synthetic VP1 BT1 fusogenic peptide encoding gene of PCR method.Designed and synthesized PCR primer with following sequence:
Primer 7:5 ' GTGACCTGCAAGTACTGGCTCAAAAAGCTAAACGTGCTCTGCCGGGTGGTCCGTCT 3 '
Primer 8:5 ' CGGAGCAACGATTTTCTGTTTGTGACGAGCGTCAGACGGACCACCCGGCA3 '
Primer 9:5 ' CCATGGAATTCAGATCTGGTGGTGTTTCTAACGTTCGTGGTGACCTGCAAGTACTG GC3 '
Primer 10:5 ' AAGCTTGGATCCCAGGTCGAAGTTCAGCAGCTGTTTAGCCGGAGCAACGATTTTCT G3 '
Adopt primer 7,8 synthetic dna fragmentations (fragment 7,8) with following sequence:
GTGACCTGCA?AGTACTGGCT?CAAAAAGCTA?AACGTGCTCT?GCCGGGTGGT?CCGTCTGACG?CTCGTCACAA
ACAGAAAATC?GTTGCTCCG
For touching plate, adopt the VP1 BT2 fusogenic peptide encoding gene at primer 9,10 synthetic band restricted enzyme point of contacts, both sides with fragment 7,8, have the following sequence shown in SEQ ID NO:3:
CCATGGAATT?CAGATCTGGT?GGTGTTTCTA?ACGTTCGTGG?TGACCTGCAA?GTACTGGCTC?AAAAAGCTAA
ACGTGCTCTG?CCGGGTGGTC?CGTCTGACGC?TCGTCACAAA?CAGAAAATCG?TTGCTCCGGC?TAAACAGCTG
CTGAACTTCG?ACCTGGGATC?CAAGCTT
PCR operation sequence that adopts and embodiment 1 are roughly the same.The method of recovery, clone VP1BT2 fusogenic peptide encoding gene and embodiment 1 are roughly the same.The pMD18-T Vect plasmid that will contain VP1BT2 fusogenic peptide encoding gene is transformed into competence e. coli jm109 cell (method is analogous to embodiment 1).Select positive colony, extract plasmid (J.Sambrook, Cold Spring HarborLaboratory Press, Molecular cloning, 1989).
Embodiment 3, structure VP1 peptide section fusion rotein encoding gene
With the VP1BT1 fusogenic peptide encoding gene on the BamHI digestion pMD18-T Vect plasmid, with the BT2 fusogenic peptide encoding gene on the Bg1II digestion pMD18-TVect plasmid, with the T4 ligase two digestion fragments connections are obtained BT1 fusogenic peptide encoding gene-BT2 fusogenic peptide encoding gene fusion gene (SEQ ID NO:5), its sequence is as follows:
GAATTCAGAT?CTGGCGGTGT?ATCTAACGTA?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCAGAACGTG
CTCTGCCGGG?TGGCGAAGAA?AACTACGGTG?GTGAAACTCA?GGTTCAGCGT?CGTCAGCACA?CTGACATCTC
CTTCATCCTG?GACCGTTTCG?TTAAAGTTAC?TCCGGGATCT?GGTGGTGTTT?CTAACGTTCG?TGGTGACCTG
CAAGTACTGG?CTCAAAAAGC?TAAACGTGCT?CTGCCGGGTG?GTCCGTCTGA?CGCTCGTCAC?AAACAGAAAA
TCGTTGCTCC?GGCTAAACAG?CTGCTGAACT?TCGACCTGGG?ATCCAAGCTT
Digest VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene respectively with BamHI and Bg1II, obtain the VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene fragment of BamHI digestion and the VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene fragment of Bg1II digestion, with the T4 ligase two digestion fragments are connected the 2 aggressiveness genes (SEQ ID NO:6) that obtain VP1 BT1 fusogenic peptide encoding gene-BT2 fusogenic peptide encoding gene fusion gene, its sequence is as follows:
GAATTCAGAT?CTGGCGGTGT?ATCTAACGTA?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCAGAACGTG
CTCTGCCGGG?TGGCGAAGAA?AACTACGGTG?GTGAAACTCA?GGTTCAGCGT?CGTCAGCACA?CTGACATCTC
CTTCATCCTG?GACCGTTTCG?TTAAAGTTAC?TCCGGGATCT?GGTGGTGTTT?CTAACGTTCG?TGGTGACCTG
CAAGTACTGG?CTCAAAAAGC?TAAACGTGCT?CTGCCGGGTG?GTCCGTCTGA?CGCTCGTCAC?AAACAGAAAA
TCGTTGCTCC?GGCTAAACAG?CTGCTGAACT?TCGACCTGGG?ATCTGGCGGT?GTATCTAACG?TACGTGGTGA
CCTGCAAGTA?CTGGCTCAAA?AAGCAGAACG?TGCTCTGCCG?GGTGGCGAAG?AAAACTACGG?TGGTGAAACT
CAGGTTCAGC?GTCGTCAGCA?CACTGACATC?TCCTTCATCC?TGGACCGTTT?CGTTAAAGTT?ACTCCGGGAT
CTGGTGGTGT?TTCTAACGTT?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCTAAACGTG?CTCTGCCGGG
TGGTCCGTCT?GACGCTCGTC?ACAAACAGAA?AATCGTTGCT?CCGGCTAAAC?AGCTGCTGAA?CTTCGACCTG
GGATCCAAGC?TT(SEQ?ID?NO:6)
2 aggressiveness genes with BamHI digestion VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene, with Bg1II digestion VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene, with the T4 ligase two digestion fragments are connected the 3 aggressiveness genes (SEQ ID NO:7) that obtain VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene, its sequence is as follows:
GAATTCAGAT?CTGGCGGTGT?ATCTAACGTA?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCAGAACGTG
CTCTGCCGGG?TGGCGAAGAA?AACTACGGTG?GTGAAACTCA?GGTTCAGCGT?CGTCAGCACA?CTGACATCTC
CTTCATCCTG?GACCGTTTCG?TTAAAGTTAC?TCCGGGATCT?GGTGGTGTTT?CTAACGTTCG?TGGTGACCTG
CAAGTACTGG?CTCAAAAAGC?TAAACGTGCT?CTGCCGGGTG?GTCCGTCTGA?CGCTCGTCAC?AAACAGAAAA
TCGTTGCTCC?GGCTAAACAG?CTGCTGAACT?TCGACCTGGG?ATCTGGCGGT?GTATCTAACG?TACGTGGTGA
CCTGCAAGTA?CTGGCTCAAA?AAGCAGAACG?TGCTCTGCCG?GGTGGCGAAG?AAAACTACGG?TGGTGAAACT
CAGGTTCAGC?GTCGTCAGCA?CACTGACATC?TCCTTCATCC?TGGACCGTTT?CGTTAAAGTT?ACTCCGGGAT
CTGGTGGTGT?TTCTAACGTT?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCTAAACGTG?CTCTGCCGGG
TGGTCCGTCT?GACGCTCGTC?ACAAACAGAA?AATCGTTGCT?CCGGCTAAAC?AGCTGCTGAA?CTTCGACCTG
GGATCTGGCG?GTGTATCTAA?CGTACGTGGT?GACCTGCAAG?TACTGGCTCA?AAAAGCAGAA?CGTGCTCTGC
CGGGTGGCGA?AGAAAACTAC?GGTGGTGAAA?CTCAGGTTCA?GCGTCGTCAG?CACACTGACA?TCTCCTTCAT
CCTGGACCGT?TTCGTTAAAG?TTACTCCGGG?ATCTGGTGGT?GTTTCTAACG?TTCGTGGTGA?CCTGCAAGTA
CTGGCTCAAA?AAGCTAAACG?TGCTCTGCCG?GGTGGTCCGT?CTGACGCTCG?TCACAAACAG?AAAATCGTTG
CTCCGGCTAA?ACAGCTGCTG?AACTTCGACC?TGGGATCCAA?GCTT(SEQ?ID?NO:7)。
3 aggressiveness genes of VP1 BT1 fusogenic peptide encoding gene-VP1BT2 fusogenic peptide encoding gene fusion gene both had been VP1 peptide section fusion rotein encoding gene.
VP1 peptide section fusion rotein encoding gene is cloned into pMD18-T Vect plasmid, and the method for employing and embodiment 1 are roughly the same used.The pMD18-T Vect plasmid that will contain VP1 peptide section fusion rotein encoding gene is transformed into competence e. coli jm109 cell (method is analogous to embodiment 1).Select positive colony, extract plasmid (J.Sambrook, Cold Spring HarborLaboratory Press, Molecular cloning, 1989).
Embodiment 4, structure recombined foot-and-mouth disease virus VP1 fusion rotein encoding gene
The pMD18-T Vect plasmid and the pET28 plasmid that contain VP1 peptide section fusion rotein encoding gene (SEQ ID NO:5) with EcoRI and HindIII digestion.
The digestion reaction that contains the pMD18-T Vect plasmid DNA of VP1 peptide section fusion rotein encoding gene (SEQ ID NO:5):
Plasmid DNA 1 μ g
10 * buffer (10 * M buffer Lot:A1032, TaKaRa) 1 μ l
Restricted enzyme HindIII (10 units/μ l) 1 μ l
Restricted enzyme EcoRI (10 units/μ l) 1 μ l
With distilled water polishing to 10 μ l
Mix the back in 37 ℃ of incubation 30-120 minutes.
The digestion reaction of pET-28a (+) plasmid:
Plasmid DNA 1 μ g
10 * buffer (10 * K buffer Lot:A1018, TaKaRa) 1 μ l
Restricted enzyme EcoRI (10 units/μ l) 1 μ l
Restricted enzyme HindIII (10 units/μ l) 1 μ l
With distilled water polishing to 10 μ l
After the mixing, in 37 ℃ of incubation 30-120 minutes.
Will with the VP1 peptide section fusion rotein encoding gene dna fragmentation of EcoRI and HindIII digestion be connected with procaryotic cell expression carrier pET-28a (+) plasmid (U.S. Novagen company) of HindIII digestion through restricted enzyme EcoRI.
Coupled reaction:
PET-28a (+) plasmid (0.5 μ g/ μ l) 2 μ l
VP1 peptide section fusion rotein encoding gene dna fragmentation DNA (300ng/ μ l) 5 μ l
10 * connection buffer
(T4?Ligation?Solution?Lot:CA2901,TaKaRa) 1μl
T4DNA ligase (T4 Ligation Code No:D2011A, TaKaRa) 1 μ l
With distilled water polishing to 10 μ l
Mix rearmounted 14-16 ℃ water-bath 6-12 hour.
Reorganization pET-28a (+) plasmid that will contain foot and mouth disease virus VP1 peptide section fusion rotein encoding gene is transformed into escherichia coli expression bacterium BL21 (BL21 (DE3).
Insertion fragment in pET-28a (+) plasmid is carried out dna sequencing.Utilize the sequence of pET-28a (+) plasmid EcoRI and both sides, HindIII point of contact to merge and recombined foot-and-mouth disease virus VP1 fusion rotein encoding gene, (SEQ ID NO:8) is as follows for its sequence:
ATGGGCAGCA?GCCATCATCA?TCATCATCAC?AGCAGCGGCC?TGGTGCCGCG?CGGCAGCCAT?ATGGCTAGCA
TGACTGGTGG?ACAGCAAATG?GGTCGCGGAT?CCGAATTCAG?ATCTGGCGGT?GTATCTAACG?TACGTGGTGA
CCTGCAAGTA?CTGGCTCAAA?AAGCAGAACG?TGCTCTGCCG?GGTGGCGAAG?AAAACTACGG?TGGTGAAACT
CAGGTTCAGC?GTCGTCAGCA?CACTGACATC?TCCTTCATCC?TGGACCGTTT?CGTTAAAGTT?ACTCCGGGAT
CTGGTGGTGT?TTCTAACGTT?CGTGGTGACC?TGCAAGTACT?GGCTCAAAAA?GCTAAACGTG?CTCTGCCGGG
TGGTCCGTCT?GACGCTCGTC?ACAAACAGAA?AATCGTTGCT?CCGGCTAAAC?AGCTGCTGAA?CTTCGACCTG
GGATCTGGCG?GTGTATCTAA?CGTACGTGGT?GACCTGCAAG?TACTGGCTCA?AAAAGCAGAA?CGTGCTCTGC
CGGGTGGCGA?AGAAAACTAC?GGTGGTGAAA?CTCAGGTTCA?GCGTCGTCAG?CACACTGACA?TCTCCTTCAT
CCTGGACCGT?TTCGTTAAAG?TTACTCCGGG?ATCTGGTGGT?GTTTCTAACG?TTCGTGGTGA?CCTGCAAGTA
CTGGCTCAAA?AAGCTAAACG?TGCTCTGCCG?GGTGGTCCGT?CTGACGCTCG?TCACAAACAG?AAAATCGTTG
CTCCGGCTAA?ACAGCTGCTG?AACTTCGACC?TGGGATCTGG?CGGTGTATCT?AACGTACGTG?GTGACCTGCA
AGTACTGGCT?CAAAAAGCAG?AACGTGCTCT?GCCGGGTGGC?GAAGAAAACT?ACGGTGGTGA?AACTCAGGTT
CAGCGTCGTC?AGCACACTGA?CATCTCCTTC?ATCCTGGACC?GTTTCGTTAA?AGTTACTCCG?GGATCTGGTG
GTGTTTCTAA?CGTTCGTGGT?GACCTGCAAG?TACTGGCTCA?AAAAGCTAAA?CGTGCTCTGC?CGGGTGGTCC
GTCTGACGCT?CGTCACAAAC?AGAAAATCGT?TGCTCCGGCT?AAACAGCTGC?TGAACTTCGA?CCTGGGATCC
AAGCTTGCGG?CCGCACTCGA?GCACCACCAC?CACCACCACT?GA(SEQ?ID?NO:9)。The recombined foot-and-mouth disease virus VP1 fusion rotein that this gene (1092 bases) coding is made up of 363 amino acid residues, (SEQ ID NO:9) is as follows for the aminoacid sequence of this recombiant protein:
MGSSHHHHHHSSGLVPRGSHMASMTGGQQMGRGSEFRSGGVSNVRGDLQVLAQKAERALPGGEENYGGETQVQRRQHTDI
SFILDRFVKVTPGSGGVSNVRGDLQVLAQKAKRALPGGPSDARHKQKIVAPAKQLLNFDLGSGGVSNVRGDLQVLAQKAE
RALPGGEENYGGETQVQRRQHTDISFILDRFVKVTPGSGGVSNVRGDLQVLAQKAKRALPGGPSDARHKQKIVAPAKQLL
NFDLGSGGVSNVRGDLQVLAQKAERALPGGEENYGGETQVQRRQHTDISFILDRFVKVTPGSGGVSNVRGDLQVLAQKAK
RALPGGPSDARHKQKIVAPAKQLLNFDLGSKLAAALEHHHHHH
The expression of embodiment 5, recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine and split bacterium
In 100ml LB culture medium, in the 500ml conical flask, it is 0.6 that 37 ℃ of water-bath concussions are cultured to OD600 with the microbionation of single bacterium colony.It is 1mM that adding IPTG makes its final concentration, and 37 ℃ of water-baths concussions were cultivated 3 hours.With conical flask 5 minutes on ice, 4 ℃ centrifugal 5 minutes (5000 * g).Abandon supernatant, collect antibacterial, immediately use or frozen.Sampling is SDS-PAGE and is analyzed recombined foot-and-mouth disease virus VP1 Expression of Fusion Protein (accompanying drawing 1).
Antibacterial is resuspended in the cell pyrolysis liquid (the 5mM imidazoles is transferred pH to 7.9 for 20mM Tris, 0.5M NaCl), and the wet bacterium of 1 gram/3ml cell pyrolysis liquid adds DNA enzymic final concentration 2 mg/ml, adds 1mM Mg
2SO
4(10 μ l/ml) adds 50MmPMSF (0.5 μ l/ml), hatched on ice 30 fens, and 5,000rpm, centrifugal 15min abandons supernatant.
Precipitation is added in conjunction with liquid, and the precipitation that the wet bacterium of 1 gram produces adds 6ml in conjunction with liquid (20mM Tris, 0.5M NaCl, 5mM imidazoles, 6M carbamide, accent pH to 7.9).Ice bath jolts 2 hours.5,000rpm, centrifugal 30min receives supernatant, uses the supernatant upper prop.
Execute the purification of example 6, recombined foot-and-mouth disease virus VP1 amalgamation protein vaccine
(1), affinity chromatography
The dress post:
Adorn post (20mM phosphate, pH 7.2 1M NaCl) with phosphate buffer, chromatography media is Sepharose4B-Ni
2+(Pharmacia) and balance.
Distilled water with 5 bed volumes is washed post.
The 20mM metal ion solution (preparation of 100mM nickel ion solution: NiSO with 3-5 bed volume
46H
2O 13.1g, two water that heat up in a steamer are added to 1000ml) be added in the post.
Elution buffer (20mM Tris, pH 7.9,5M NaCl, 0.5M imidazoles, 4M carbamide) with 5 bed volumes is washed post.
Adsorption-buffering liquid (20mM Tris, pH7.9,0.5M NaCl, 5mM imidazoles) with 5 bed volumes is washed post.
In conjunction with:
Sample is added in the metalchelated post.
With the washing 1 buffer (20mM Tris, pH 7.9,0.5M NaCl, the 20mM imidazoles, 4M carbamide is washed post.
Eluting:
With eluting 2 buffer (20mM Tris, pH 7.9,0.5M NaCl, 1M imidazoles, 4M carbamide) eluting, collect the albumen of eluting., access the effluent of different periods with container, and carry out the SDS electrophoresis not only dropping to up to absorption value, judge purification effect, purity can reach more than 50%.
(2), desalination
With Sephadex G25 (Pharmacia) dress post.
Distilled water with 2 bed volumes is washed post.
With the 10mM PBS of 2 bed volumes, pH 7.2 washes post.
Last sample.
Use 10mM PBS, pH 7.2 eluting,
Collect the albumen of eluting, this albumen is recombined foot-and-mouth disease virus VP1 fusion rotein.
Recombined foot-and-mouth disease virus VP1 fusion rotein is preserved in lyophilizing.
The recombined foot-and-mouth disease virus VP1 fusion rotein of purification is identified that its purity reaches 95% (seeing accompanying drawing 2) with SDS-PAGE.
The immunity of embodiment 7, recombined foot-and-mouth disease virus VP1 fusion rotein
Immune programme for children:
Three immunity, 14 days at interval, initial immunity aluminum added adjuvant, and twice booster immunization do not add aluminium adjuvant.The dosage of each immunity be 50 micrograms/only/time.If recombined foot-and-mouth disease virus VP1 fusion protein immunization group, foot and mouth disease virus inactivated vaccine (Inner Mongol bio-pharmaceuticals factory group) group and PBS matched group, every group of 3 Cavia porcelluss.
The preparation aluminium adjuvant:
10%12 water aluminum potassium sulfate solutions move in 50 milliliters of conical flasks for 10 milliliters.Dropwise add 22.8 milliliters of 0.25N sodium hydroxide, concussion mixing while adding.
Incubated at room 10 minutes.Centrifugal 10 minutes of 1000g.Abandon supernatant.Add the resuspended sedimentary aluminium hydroxide of 50 ml distilled waters.
In the above-mentioned aluminium hydroxide of packing suspension to 20 centrifuge tube, 1 milliliter of every pipe.Centrifugal 10 minutes of 1000g. abandon supernatant.
200 microgram recombined foot-and-mouth disease virus VP1 fusion rotein are dissolved in the aluminium adjuvant that 400 microlitres prepare, piping and druming mixing, incubated at room 20 minutes.The lumbar injection immunity, 100 microlitres/every Cavia porcellus.
After the lumbar injection immunity the 21st day, do booster immunization.With PBS dissolving recombined foot-and-mouth disease virus VP1 fusion rotein, concentration is 50 micrograms/0.2 milliliter.Vein (penile vein) injection, 0.2 milliliter of every Cavia porcellus.0.2 milliliter of PBS of matched group Cavia porcellus injection.
After the lumbar injection immunity the 42nd day, do booster immunization for the second time.With PBS dissolving recombined foot-and-mouth disease virus VP1 fusion rotein, concentration is 50 micrograms/0.2 milliliter.Vein (penile vein) injection, 0.2 milliliter of every Cavia porcellus.0.2 milliliter of PBS of matched group Cavia porcellus injection.
After the lumbar injection immunity the 46th day.The aseptic guinea pig heart blood of getting.Be positioned in the test tube.37 ℃ 1 hour.Tilt to place for 4 ℃ and spend the night, treat that serum is fully separated out after, collect serum, aseptic subpackaged ,-20 ℃ of preservations.
The detection of embodiment 8, foot and mouth disease virus specific antibody (ELISA method)
The purification of foot and mouth disease virus carries out in Inner Mongol bio-pharmaceuticals factory.The BHK cell monolayer of learning from else's experience is cultivated the fresh O1 type hoof-and-mouth disease venom (Inner Mongol bio-pharmaceuticals factory) of amplification, 4000 rev/mins centrifugal 20 minutes, remove cell debris.Dropwise adding saturated polyethylene glycol 6000 to final concentration in supernatant is 7%, stirs 4 ℃ of static spending the night while dripping.5000 rev/mins centrifugal 30 minutes, collecting precipitation.To precipitate resuspendedly with the PB liquid of pH7.6, on the sucrose density gradient of 15%-45%, be further purified (centrifugal force is 35000 gram forces, and the time is 3 hours, and temperature is 4 ℃).The segmentation sampling is surveyed each section sample 260nm absorption value with the ultraviolet monitoring instrument, and the virion of 146s appears in the sucrose of 30%-35%.It with 5 times of PB liquid dilutions, is being contained on the PB liquid of 20% sucrose centrifugal 2 hours, and centrifugal force is 35000 gram forces, and temperature is 4 ℃, collecting precipitation.To precipitate and use PB liquid resuspended, measure the foot and mouth disease virus concentration of purification with the BCA method.
Foot-and-mouth disease virus antigen wrapper sheet with purification.Coating buffer is 0.05M, the carbonate buffer solution of pH value 9.6, and every hole 100 μ l contain foot-and-mouth disease virus antigen 1 μ g, and 4 ℃ of bags are spent the night.After washing plate 3 times with the PBS that contains 0.05% polysorbas20 (PBS-T) washing liquid, add confining liquid (PBS-T that contains 2%BSA) 200 μ l and placed 1 hour in 37 ℃ of incubators.Wash and to dilute (1: 2048) good serum to be checked 100 μ l behind the plate 3 times and add each hole, placed 1 hour in 37 ℃ of incubators.If 3 multiple holes.Wash plate 3 times, add enzyme labelled antibody (the goat-anti Cavia porcellus IgG of horseradish peroxidase-labeled) working solution, hatched 1 hour for 37 ℃, add tmb substrate solution and H
2O
2Placed 10-30 minute for 37 ℃, survey OD value (A492), with the average and the standard deviation ecbatic of each group OD value with microplate reader.
The result:
Blank: OD value: 0.005 ± 0.0005
Recombined foot-and-mouth disease virus VP1 fusion protein immunization Cavia porcellus 1:1.55 ± 0.013
Recombined foot-and-mouth disease virus VP1 fusion protein immunization Cavia porcellus 2:1.231 ± 0.021
Recombined foot-and-mouth disease virus VP1 fusion protein immunization Cavia porcellus 3:1.001 ± 0.013
3 PBS control group mice: 0.403 ± 0.014
Experimental result shows, has the antibody of high-caliber foot-and-mouth disease virus resistant in the recombined foot-and-mouth disease virus VP1 fusion protein immunization guinea pig serum.
In the neonatal rat of embodiment 9, recombined foot-and-mouth disease virus VP1 fusion protein immunization serum and the experiment
2 times of doubling dilution serum to be detected and hoof-and-mouth disease venom (100 TCID50/0.1ml) equal-volume are mixed, hatched 1 hour for 37 ℃.Through the above-mentioned mixed liquor of neonatal rat item back subcutaneous injection 0.2ml, observed each group morbidity of record, death condition continuously 3 days.
Carry out in Inner Mongol bio-pharmaceuticals factory with experiment in the neonatal rat, adopt " O " type hoof-and-mouth disease poison strain.The concentration of virus is 1 milliliter of 1000 LD50.The doubling dilution guinea pig serum.Different dilution factor guinea pig serum of 100 μ l and 100 μ l viral dilution liquid are mixed, hatched 1 hour for 37 ℃.At neonatal rat back injection said mixture.Observed 48 hours.The neonatal rat number of record survival.
Result's (as accompanying drawing 3,4, shown in 5): the serum of recombined foot-and-mouth disease virus VP1 fusion protein immunization Cavia porcellus still can be protected neonatal rat fully being diluted at 1: 2048 o'clock.
Conclusion: recombined foot-and-mouth disease virus VP1 fusion rotein stimulates animal to produce neutralizing antibody, and this neutralizing antibody can prevent the zoogenetic infection foot and mouth disease virus.
<223〉the VP1 BT1 fusogenic peptide encoding gene at both sides band restricted enzyme point of contact
<223〉the VP1 BT2 fusogenic peptide encoding gene at both sides band restricted enzyme point of contact
<223〉BT1 fusogenic peptide encoding gene-BT2 fusogenic peptide encoding gene fusion gene sequence
<223〉2 aggressiveness gene order<400 of VP1 BT1 fusogenic peptide encoding gene-BT2 fusogenic peptide encoding gene fusion gene〉6
<223〉gene order of 3 aggressiveness of VP1 BT1 fusogenic peptide encoding gene-VP1 BT2 fusogenic peptide encoding gene fusion gene
<223〉recombined foot-and-mouth disease virus VP1 fusion rotein coding gene sequence
<223〉aminoacid sequence of recombined foot-and-mouth disease virus VP1 fusion rotein