CN101289501A - Pokeweed antibiotic peptides, precursor peptides thereof, polynucleotide and applications - Google Patents
Pokeweed antibiotic peptides, precursor peptides thereof, polynucleotide and applications Download PDFInfo
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- CN101289501A CN101289501A CNA2008100658608A CN200810065860A CN101289501A CN 101289501 A CN101289501 A CN 101289501A CN A2008100658608 A CNA2008100658608 A CN A2008100658608A CN 200810065860 A CN200810065860 A CN 200810065860A CN 101289501 A CN101289501 A CN 101289501A
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- 239000002243 precursor Substances 0.000 title claims abstract description 19
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- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
The invention relates to a pokeweed antimicrobial peptide, the precursor peptide of the pokeweed antimicrobial peptide, polynucleotide and application thereof. The pokeweed antimicrobial peptide of the invention is pokeweed antimicrobial peptide Pa-AMP05, or active derivatives with antibacterial effect obtained from modified amino acid residues thereof, or polypeptide with antibacterial function, derived from pokeweed antimicrobial peptide Pa-AMP05 and formed by substituting, deleting or adding one or a plurality of amino acid residues. The precursor peptide of the pokeweed antimicrobial peptide of the invention has an amino acid sequence described in SEQ ID NO: 2 in the sequence table. The pokeweed antimicrobial peptide of the invention is used for preparing antibacterial products, such as feed additives, veterinary drugs, preservatives and pharmaceutical products such as antibacterial agents, etc.
Description
Technical field
The present invention relates to bioengineering field, be specifically related to the polynucleotide of a kind of pokeweed antibiotic peptides, its precursor peptide, this precursor peptide of encoding and the application of pokeweed antibiotic peptides.
Background technology
Antibacterial peptide (antimicrobial peptides) is the natural small molecular protein that a class has anti-microbial activity.From Sweden scientist Boman in 1975 etc. separate on one's body from silkworm chrysalis obtain first antibacterial peptide cecropin (Cecropin) since, people are again insect, batrachians, aquatic animal, and comprise that people's Mammals even plant and bacterium etc. have found at least 900 surplus kinds of antibacterial peptides in the biological spectrum widely.This endogenic antibacterial peptide synthesizes through inducing, and playing an important role aspect the invasion of body opposing cause of disease, is the important component part of body non-specific immunity.Antibacterial peptide is compared advantages such as having molecular weight is little, has a broad antifungal spectrum, Heat stability is good, antibiotic mechanism uniqueness with traditional microbiotic.And bacterium, fungi, parasite, virus, cancer cells etc. all there is stronger lethal effect.
Very active to the antibiotic research of plant polypeptide at present, very fast in the progress aspect many such as separation and purification, antimicrobial characteristic, cytotoxicity, physico-chemical property and transgenosis.Had now found that more than 150 kind of physico-chemical property and the different plant antibiotic of antimicrobial characteristic, wherein the widest with the source of plant alexin, nearly 80 kinds of quantity.In addition, people have found antimicrobial polypeptides such as thionine, commentaries on classics lipoprotein from crops such as wheat, barley, wild cabbage, radish.Found shepherd's purse element, cyclic peptide, ecdysone and plant alexin etc. again, and greatly enriched the type of plant polypeptide microbiotic family in nearly 2～3 years.Most plant polypeptide microbiotic are rich in halfcystine (Cys), and all Cys form intramolecular disulfide bond, and this may be that the plant polypeptide microbiotic is to the highly stable reason of heat.Nearly all plants antimicrobial polypeptide all is that precursor generally all comprises signal peptide and mature peptide at least with precursor (precursor) form synthetic.The mechanism of action of plants antimicrobial peptide and animal antibacterial peptide may be different, as plant alexin not have and plasma membrane on phosphatide directly act on, but form ionic channel by the high affine site mediation on some films, destroy the potential difference inside and outside the film and the permeability of film.
Dyers' grapes (Phytolacca americana) country of origin is in the North America, and this life circle, introduced a fine variety and naturalization various places, and China is widely distributed.It is usually used in inducing diuresis to remove edema as medicinal plant, detoxifcation desinsection etc.Nilgun etc. from the different tissues of dyers' grapes or different growth phase separate obtain multiple antiviral protein (pokeweed antiviral proteins, PAPs).It belong to I type ribosome inactivating protein (ribosomeinactivating proteins, RIP), owing to this proteinoid has the concern that antiviral activity is subjected to numerous investigators.
The contriver with antibacterial peptide complete sequence amino acid structure of the present invention through the Protein Data Bank search relatively, finding no any phase homopolypeptide. the contriver searches comparison with antibacterial peptide encoding gene of the present invention through gene database, also finds no any homologous genes.
Summary of the invention
First purpose of the present invention is to provide a kind of pokeweed antibiotic peptides.
Second purpose of the present invention is to provide the precursor peptide of code book invention pokeweed antibiotic peptides.
The 3rd purpose of the present invention is to provide the polynucleotide of the precursor peptide of code book invention pokeweed antibiotic peptides.
The 4th purpose of the present invention is pokeweed antibiotic peptides of the present invention is applied to prepare disease-resistant becteriums product.
Dyers' grapes of the present invention (Phytolacca americana L.) pick up from suburb, Hunan China Yueyang.
The present invention clones from the dyers' grapes seed and obtains the antibacterial peptide member with the method in construction cDNA library.
The structure in dyers' grapes seed cDNA library: at first extract total RNA from the dyers' grapes seed.Get total RNA and carry out the synthetic cDNA first chain product of reverse transcription.Get cDNA again and be used for ligation, conversion fluid is coated plate respectively, and all the other are used to shake total storehouse bacterium liquid, and the picking mono-clonal is protected kind from the flat board.
The present invention by to above recombinant clone at random picking clone carry out sequencing and the sequence of being measured carried out the BLAST retrieval, obtain 1 est sequence coding pokeweed antibiotic peptides.Applicant general's called after pokeweed antibiotic peptides Pa-AMP05.Pokeweed antibiotic peptides Pa-AMP05 is made up of 38 amino acid, contains 6 halfcystines, according to the feature of antibacterial peptide, forms three pairs of disulfide linkage.The molecular weight of pokeweed antibiotic peptides Pa-AMP05 is 4193.8 dalton, and iso-electric point is 9.3, is alkalescence.Pokeweed antibiotic peptides Pa-AMP05 has typical antibacterial peptide primary structure feature and physics-chem characteristic, and its aminoacid sequence is shown in SEQ ID NO:3 in the sequence table, and is specific as follows:
Ala?Gly?Cys?Ile?Lys?Asn?Gly?Gly?Arg?Cys?Val?Ala?Ser?Gly?Gly
1 5 10 15
Pro?Pro?Tyr?Cys?Cys?Ser?Asn?Tyr?Cys?Tyr?Arg?Gln?Val?Gly?Trp
20 25 30
Ala?His?Arg?Tyr?Cys?Lys?Asn?Arg
35
Pokeweed antibiotic peptides of the present invention is following (a) or (b) or (c) described polypeptide:
(a) have the described aminoacid sequence of SEQ ID NO:3 in the sequence table, i.e. pokeweed antibiotic peptides Pa-AMP05;
(b) (a) described aminoacid sequence passes through the polypeptide derivative of modifying the functional equivalent that obtains;
(c) aminoacid sequence in (a) is formed through replacement, disappearance or the interpolation of one or more amino-acid residues have antibacterial by (a) polypeptides derived.
Above-mentioned (b) described pokeweed antibiotic peptides, the C-terminal amidation modifier of preferred pokeweed antibiotic peptides Pa-AMP05.
Pokeweed antibiotic peptides of the present invention can be the product that obtains by chemosynthesis, dna recombinant expression.
The precursor peptide of pokeweed antibiotic peptides Pa-AMP05 of the present invention, its aminoacid sequence is shown in SEQ ID NO:2 in the sequence table, and is specific as follows:
Met?Ala?Lys?Val?Ser?Ser?Ala?Tyr?Leu?Lys?Phe?Ala?Leu?Val?Met
1 5 10 15
Ile?Leu?Leu?Leu?Ser?Val?Ile?Ser?Ala?Val?Met?Ser?Ala?Gly?Cys
20 25 30
Ile?Lys?Asn?Gly?Gly?Arg?Cys?Val?Ala?Ser?Gly?Gly?Pro?Pro?Tyr
35 40 45
Cys?Cys?Ser?Asn?Tyr?Cys?Tyr?Arg?Gln?Val?Gly?Trp?Ala?His?Arg
50 55 60
Tyr?Cys?Lys?Asn?Arg
65
The polynucleotide sequence of the precursor peptide of coding pokeweed antibiotic peptides Pa-AMP05 is shown in SEQ ID NO:1 in the sequence table, and is specific as follows:
1?aaaagaaagt?aggctaaacc?ctttgataaa?taatcatcaa?catggctaag?gtttcatctg
61?cctacctgaa?atttgctctc?gtcatgattc?tcttattaag?cgtaatatca?gctgttatgt
121?cagcgggatg?catcaagaat?ggaggaaggt?gtgttgcaag?tggaggtccc?ccatactgtt
181?gctctaacta?ctgttaccgt?caggttggat?gggctcatcg?ctattgcaaa?aaccgctaat
241?aaacaacaat?acatgctgta?aagtatgggg?gatagactcc?catactatat?tatgttagag
301?caaaagcctc?acttcttatg?ttagtgtgtt?ttatgttacc?ttc-ttatat?gtcaaagaag
361?gtatattgaa?taagaggctt?tatgatatat?tgtaagcttt?ttaacaatga?tatttatata
421?taaaaaaaaa?aaaaa
Polynucleotide of the present invention are following (a) or (b) described nucleotide sequence:
(a) polynucleotide of the precursor peptide of coding pokeweed antibiotic peptides Pa-AMP05;
(b) with polynucleotide (a) complementary polynucleotide.
Polynucleotide of the present invention preferably have the polynucleotide of the described nucleotide sequence of SEQ ID NO:1 in the sequence table.
The pokeweed antibiotic peptides Pa-AMP05 biologically active that the present invention obtains has anti-microbial effect.The Pa-AMP05 of separation and purification can suppress part malignant bacteria and fungi when 100nM.Therefore, pokeweed antibiotic peptides of the present invention can be applicable to prepare disease-resistant becteriums product, and disease-resistant becteriums product comprises fodder additives, veterinary drug, sanitas, pharmaceutical prod such as antibacterials etc.
Description of drawings
Fig. 1 is the bacterium colony PCR electrophoretogram of dyers' grapes seed cDNA of the present invention library recombinant plasmid;
Fig. 2 is the SDS-PAGE result of experiment figure of pokeweed antibiotic peptides Pa-AMP05 recombination expression product;
Fig. 3 is that pokeweed antibiotic peptides Pa-AMP05 ion-exchange separates elution profile;
Fig. 4 suppresses the experimental group experimental result of intestinal bacteria growth for pokeweed antibiotic peptides Pa-AMP05;
Fig. 5 suppresses the control group experimental result of intestinal bacteria growth for pokeweed antibiotic peptides Pa-AMP05.
Embodiment
Embodiment one: the structure and the est sequence analysis in dyers' grapes seed cDNA library
The extraction of total RNA and cDNA are synthetic: get the dyers' grapes seed and add liquid nitrogen and grind, carry out total RNA with reference to the TRIZOL LS reagent specification sheets of Gibco BRL company and extract.Library construction adopts the Clontech Smart cDNA Library Construction Kit of company test kit, and utilizes the incidental primer of test kit itself, carrier, restriction enzyme etc. to experimentize.Get the total RNA of 1 μ g dyers' grapes seed with SMART III oligonucleotide segment (5 '-AAGCAGTGGTATCAACGCAGAGTGGCCATTATGGCCGGG-3 ') and CDSIII/3 ' PCR primer (5 '-ATTCTAGAGGCCGAGGCGGCCGACATG-d (T)
30N-
1N-3 ') carries out synthetic first chain of reverse transcription, obtain 10 μ l cDNA, the first chain product.Get the 2ul first chain product with 5 ' PCR primer (5 '-AAGCAGTGGTATAACGCAGAGT-3 '), CDSIII/3 ' primer (5 '-ATTCTAGAGGCCGAGGCGGCCGACATGd (T)
30N-
1N-3 ') increases, cut processing, be connected to same restrictions restriction endonuclease sfiI enzyme with the T4 dna ligase and cut on the library construction vector plasmid of handling carrying out enzyme with restriction enzyme sfiI behind two chain protease K digestion and the purifying.Transform 1 μ l and connect product, get conversion fluid and be diluted to coated plate behind the suitable concn.200 mono-clonals of picking at random, shake bacterium, protect and plant, extract plasmid (the bacterium colony PCR result of recombinant plasmid as shown in Figure 1), the unidirectional order-checking of T7 primer, manual BLASTN and the online homology comparison of BLASTX, SEQTOOL, the ClustalX 1.83 programanalysis sequencing results of using.The result shows two clones and is the pokeweed antibiotic peptides gene.
Embodiment two: the mensuration and the analysis of dyers' grapes antifungal genes Pa-AMP05 sequence
The sequence of South Sea dyers' grapes antifungal genes Pa-AMP05 is carried out bioinformatic analysis to this sequence and is shown that its cDNA sequence length is 435bp from 2 height homologous est sequences of being cloned in the embodiment one dyers' grapes seed cDNA library.Utilize tool software SEQTOOL that its base sequence is analyzed, and obtain its maximum opening code-reading frame, length 195bp (not comprising terminator codon), the precursor peptide of 65 amino-acid residues of coding, its nucleotide sequence is as described in the SEQ ID NO:1 in the sequence table, and the aminoacid sequence of the precursor peptide of 65 amino-acid residues is as described in the SEQ ID NO:2 in the sequence table.Further analyze and show, the 1-27 amino acids residue of this precursor peptide is its signal peptide zone, the leading peptide and the mature peptide of precursor peptide are partly separated, so determine that the aminoacid sequence of Pa-AMP05 mature peptide is AGCIKNGGRCVASGGPPYCCSNYCYRQVGWAHRYCKNR, i.e. the described aminoacid sequence of SEQ ID NO:3 in the sequence table.This mature peptide contains 6 halfcystines, these 6 halfcystines are conservative at the pokeweed antibiotic peptides camber that has been found that, and form three pairs of disulfide linkage and constitute a fine and close structure, and it has anti-microbial activity in follow-up experimental results show that, so pokeweed antibiotic peptides Pa-AMP05 is new plants antimicrobial peptide member.
Embodiment three: pokeweed antibiotic peptides gene Pa-AMP05's is recombinant expressed
This experiment adopts histidine defect type pichia spp GS115 as the host bacterium, adopts secretion expression's carrier pPICZ α A to make up recombinant expression system.Select SacI restriction endonuclease linearizing recombinant vectors pPICZ α A, to be connected with linearized vector by the T4DNA ligase enzyme by the antibacterial peptide Pa-AMP05 gene that the molecular cloning means make it to have corresponding restriction enzyme site then, again it is transformed in the bacillus coli DH 5 alpha, utilizes the less salt LB plate screening positive transformant of Zeocin resistance.Choose single colony inoculation and cultivate, the extracting plasmid carries out enzyme and cuts checking and order-checking." the molecular cloning testing laboratory handbook that the detailed method of whole experiment is write referring to Sam brook J..
The competent cell of preparation Pichi strain GS115.Get the linearizing recombinant expression plasmid mixing of 80ml competent cell and 10ug SacI single endonuclease digestion; shock by electricity transform .30 ℃ of incubation 1h after; bacterium liquid is coated in contains on the antibiotic YPD solid medium of the 100ug/ml Zeocin flat board .30 ℃ of constant temperature culture 2 ~ 4 days, filter out positive bacterium colony.Simultaneously, with the blank plasmid transformed yeast of the linearizing pPICZ α of Sacl A GS115 bacterial strain as blank.
The positive recombination microzyme that evaluation is obtained joins respectively in the 10ml YPDA substratum, 30 ℃ of constant temperature culture, and then utilizes methyl alcohol as inductor, and Pa-AMP05 carries out abduction delivering to the reorganization target protein.Fig. 2 shown get respectively do not induce, the supernatant of abduction delivering product and abduction delivering product carries out SDS-PAGE result of experiment figure.
Embodiment four: the purifying of reorganization pokeweed antibiotic peptides
The embodiment three resulting fermented supernatant fluids that contain recombinant antibacterial peptide, through the SephadexG-25 post change into level pad (20mM PBS, pH6.0) after, last CM sepharose FF cationic exchange coloum.Collect the percolation peak, wash post to plateau with aforementioned level pad.Then, with solution A (20mM PBS, pH8.0) and solution B (the 20mM PBS that contains 1M NaCl, pH8.0) mixed solution linear gradient elution, collect each elution peak, analyze (elution protocol after the optimization is for using 100,200 respectively, the PBS eluant solution of 500mM NaCl) with Tricine/TrisSDS-PAGE electrophoresis (silver dyes).Result such as Fig. 3 show that target protein is eluted in containing the 20mM PBS (pH8.0) of 200mMNaCl.Can obtain purity at last at the reorganization pokeweed antibiotic peptides Pa-AMP05 more than 95%, yield is about the 300ug/L substratum.
Embodiment five: the bacteriostatic activity experiment of pokeweed antibiotic peptides Pa-AMP05
Anti-microbial activity detects and adopts the drug sensitive test paper method, and substratum is the LB nutrient agar.Pouring the cultivation that 10ml heating dissolves into is in the culture dish of 90ml based on diameter, makes substratum uniform distribution at the bottom of ware, after waiting to solidify, gets Escherichia coli bacteria liquid coating that 0.1ml prepares thereon, makes bacterial concentration and is about 10
6Cfu/cm
2Contain the bacterium flat board, will paste at 5 hours filter paper of different concns antibacterial peptide solution soaking (diameter 5mm) simultaneously and be put on the substratum, in 37 ℃ of biochemical incubators, carry out constant temperature culture, measure the size of inhibition zone behind the 24h.The bacterial classification that tries comprises intestinal bacteria, streptococcus aureus, streptococcus pneumoniae, all derives from Agricultural University Of South China, and the test triplicate is got geometrical mean.Fig. 4 and Figure 5 shows that 100nM antibacterial peptide Pa-AMP05 forms the experimental result of inhibition zone to intestinal bacteria.
Embodiment six: pokeweed antibiotic peptides Pa-AMP05 can improve sow hog cholera antibody level
We are main active ingredient with recombinant expressed antibacterial peptide Pa-AMP05, feed sow after making feedstuff additive product.Experiment sow kind is the white two-way cross kind of long Bai Yuda, and little pig variety is a DLY three way cross kind.Experimental group is added Chinese spy 150 to pig starter feed in 3 ‰ ratio, adds the special 150S of the Chinese to sow feed with same ratio.Establish the hurdle in the testing ground test group is separated raising, every group all is provided with repetition more than three times.
The result shows: after sow and special 150 series of the piglet interpolation Chinese, it is 80.34% that the sow hog cholera antibody is tired at the ratio more than 1: 512, improves 46% than control group.Experimental group antibody qualification rate is 96.6%, and control group only is 71%.More than experiment shows, antibacterial peptide Pa-AMP05 has the effect that improves sow immunizing power.
The hog cholera antibody level changed after table one antibacterial peptide Pa-AMP05 fodder additives was fed sow
Pokeweed antibiotic peptides Pa-AMP05 of the present invention can suppress the part pathogenic microorganism, improves animal immunizing power.Therefore, pokeweed antibiotic peptides of the present invention can be applicable to prepare disease-resistant becteriums product, as: fodder additives, veterinary drug, sanitas, antibacterials etc.
Sequence table
＜110〉Shenzhen Sunsmile Biotechnology Co., Ltd.
＜120〉dyers' grapes antimicrobial polypeptide, its encoding gene, its mature peptide and application
<160>3
<170>Patent?In?version?3.1
<210>1
<211>435
<212>DNA
＜213〉dyers' grapes (Phytolacca americana L.)
<400>1
1?aaaagaaagt?aggctaaacc?ctttgataaa?taatcatcaa?catggctaag?gtttcatctg
61?cctacctgaa?atttgctctc?gtcatgattc?tcttattaag?cgtaatatca?gctgttatgt
121?cagcgggatg?catcaagaat?ggaggaaggt?gtgttgcaag?tggaggtccc?ccatactgtt
181?gctctaacta?ctgttaccgt?caggttggat?gggctcatcg?ctattgcaaa?aaccgctaat
241?aaacaacaat?acatgctgta?aagtatgggg?gatagactcc?catactatat?tatgttagag
301?caaaagcctc?acttcttatg?ttagtgtgtt?ttatgttacc?ttc-ttatat?gtcaaagaag
361?gtatattgaa?taagaggctt?tatgatatat?tgtaagcttt?ttaacaatga?tatttatata
421?taaaaaaaaa?aaaaa
<210>2
<211>65
<212>PRT
＜213〉dyers' grapes (Phytolacca americana L.)
<400>2
Met?Ala?Lys?Val?Ser?Ser?Ala?Tyr?Leu?Lys?Phe?Ala?Leu?Val?Met
1 5 10 15
Ile?Leu?Leu?Leu?Ser?Val?Ile?Ser?Ala?Val?Met?Ser?Ala?Gly?Cys
20 25 30
Ile?Lys?Asn?Gly?Gly?Arg?Cys?Val?Ala?Ser?Gly?Gly?Pro?Pro?Tyr
35 40 45
Cys?Cys?Ser?Asn?Tyr?Cys?Tyr?Arg?Gln?Val?Gly?Trp?Ala?His?Arg
50 55 60
Tyr?Cys?Lys?Asn?Arg
65
<210>3
<211>38
<212>PRT
＜213〉dyers' grapes (Phytolacca americana L.)
<400>3
Ala?Gly?Cys?Ile?Lys?Asn?Gly?Gly?Arg?Cys?Val?Ala?Ser?Gly?Gly
1 5 10 15
Pro?Pro?Tyr?Cys?Cys?Ser?Asn?Tyr?Cys?Tyr?Arg?Gln?Val?Gly?Trp
20 25 30
Ala?His?Arg?Tyr?Cys?Lys?Asn?Arg
35
Claims (7)
1. pokeweed antibiotic peptides is following (a) or (b) or (c) described polypeptide:
(a) has the described aminoacid sequence of SEQ ID NO:3 in the sequence table;
(b) (a) described aminoacid sequence passes through the polypeptide derivative of modifying the functional equivalent that obtains;
(c) aminoacid sequence in (a) is formed through replacement, disappearance or the interpolation of one or more amino-acid residues have antibacterial by (a) polypeptides derived.
2. pokeweed antibiotic peptides according to claim 1 is characterized in that: wherein, (b) be the C-terminal amidation modifier of (a) described polypeptide.
3. pokeweed antibiotic peptides according to claim 1 is characterized in that: (b) described chemically modified include but not limited to acetylize, amination, methylate, biotin labeling, phosphorylation.
4. the precursor peptide of a pokeweed antibiotic peptides has the described aminoacid sequence of SEQ ID NO:2 in the sequence table.
5. polynucleotide are following (a) or (b) described nucleotide sequence:
(a) polynucleotide of the described polypeptide of coding claim 4;
(b) with polynucleotide (a) complementary polynucleotide.
6. polynucleotide according to claim 5 is characterized in that: have the described nucleotide sequence of SEQ ID NO:1 in the sequence table.
7. claim 1 or the 2 described pokeweed antibiotic peptides application on the disease-resistant becteriums product of preparation, described disease-resistant becteriums product comprises fodder additives, veterinary drug, sanitas and pharmaceutical prod.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199215A (en) * | 2011-03-22 | 2011-09-28 | 成都市金之源生物技术有限公司 | MAPWA fusion antibacterial peptide, preparation method and application thereof |
| CN102260632A (en) * | 2009-09-18 | 2011-11-30 | 深圳市圣西马生物技术有限公司 | Engineering yeast strain, its preparation method and application |
| CN112641929A (en) * | 2020-11-06 | 2021-04-13 | 华南师范大学 | Antiviral application of periplaneta americana host defense peptide |
-
2008
- 2008-03-17 CN CNB2008100658608A patent/CN100509845C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260632A (en) * | 2009-09-18 | 2011-11-30 | 深圳市圣西马生物技术有限公司 | Engineering yeast strain, its preparation method and application |
| CN102199215A (en) * | 2011-03-22 | 2011-09-28 | 成都市金之源生物技术有限公司 | MAPWA fusion antibacterial peptide, preparation method and application thereof |
| CN102199215B (en) * | 2011-03-22 | 2014-03-19 | 成都市金之源生物技术有限公司 | MAPWA fusion antibacterial peptide, preparation method and application thereof |
| CN112641929A (en) * | 2020-11-06 | 2021-04-13 | 华南师范大学 | Antiviral application of periplaneta americana host defense peptide |
| CN112641929B (en) * | 2020-11-06 | 2021-07-20 | 华南师范大学 | Antiviral application of periplaneta americana host defense peptide |
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