CN109055507A - Detect the primer and method of Agasicles hygrophila EF gene expression characteristics - Google Patents
Detect the primer and method of Agasicles hygrophila EF gene expression characteristics Download PDFInfo
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Abstract
The present invention provides a kind of fluorescence quantification PCR primer for detecting Agasicles hygrophila EF gene expression characteristics, primer includes two pairs, and for sequence as shown in SEQ ID NO.1-4, the present invention establishes the female male worm feeding difference CO of Agasicles hygrophila2The fluorescence quantitative PCR method that EF gene expression amount detects after the alternanthera philoxeroides that concentration is cultivated, and the sequencing of transcript profile is carried out, compared with having done to the expression quantity trend of EF gene by fluorescence quantitative with the expression quantity trend of transcript profile, the defense mechanism and EF gene expression characteristics generated when for research Agasicles hygrophila by environment-stress is laid a good foundation.
Description
Technical field
The present invention relates to a kind of fluorescence quantification PCR primers for detecting Agasicles hygrophila EF gene expression characteristics, belong to life
Object technical field.
Background technique
Agasicles hygrophila category coleoptera, Chrysomelidae are one of main biological and ecological methods to prevent plant disease, pests, and erosion natural enemies of alternanthera philoxeroides.George
Vogt had found that Agasicles hygrophila had good control action to alternanthera philoxeroides in 1962 for the first time.Thereafter, the straight chest of lotus grass
Flea beetle is widely used in the control of alternanthera philoxeroides on the U.S., Australia and other places, and achieves preferable control efficiency.I
State introduced Agasicles hygrophila from the U.S. in 1986, and was applied to the biological control of alternanthera philoxeroides, in Sichuan, Zhejiang, good fortune
It builds, the ground such as Guangxi obtain certain success.
Elongation factors (elongation factor, EF) are the protein factors for participating in peptide chain extension in protein synthesis,
Play an important role in the metabolic processes of all multicellular organisms, it include elongation factors EF-1 and extend because
Sub- EF-2.Elongation factors EF-1 is made of 4 subunits such as α, β, γ and δ, is intracellular generally existing and great expression poly
Ribosomal protein plays an important role in gene expression and translation process.Peptide when EF-2 is eukaryotic protein synthesis
Essential protein factor during chain extension, it can be catalyzed GTP hydrolysis, make peptide acyl-tRNA from ribosomal aminoacyl site
Point moves on to peptidyl site, so that ribosomes be made to move along mRNA to complete transcription.Therefore, the normal expression of EF is related to
The growth of body cell and the synthesis of protein, EF passes through the expression quantity for constantly changing it in the cell, to adjust gross protein
Synthesis, different mechanisms effect under, EF activity and expression quantity can also change.
Research shows that the stress factor in water body environment can cause extensive cell to damage in crustacean aquaculture production
Wound, including DNA damage, lipid peroxidation and protein oxidation etc., the expression quantity for eventually leading to EF change.Luo Lin
(2014) such as leaching determine different insecticides and act on Monochamus alternatus EF gene, and leading to it has different degrees of up-regulated expression,
Illustrate that Monochamus alternatus produces self-protection reaction.The ability of the cell adapted environmental pressure of biologic artifact is the pass that they survive
Key, organism make it have certain responsibility, the common spy of many responses to environment and physical stress during evolution
Point is the transcription and translation of selective control gene, the quick expression including allowing reversible gene.Current study show that environment pressure
Power can induce the expression of EF gene, so that the synthesis of regulatory protein matter is with the variation of response environment condition.
The researchs such as the expression about Agasicles hygrophila EF gene have not been reported both at home and abroad, therefore use real time fluorescent quantitative
PCR studies different CO2The expression characterization of the lower Agasicles hygrophila EF gene of concentration processing, the results showed that, with CO2The liter of concentration
The expression quantity of height, female male worm EF gene increases, this is consistent with the variation tendency of transcript profile expression quantity up-regulation, illustrates CO2Concentration
Increase the expression regulation that can influence EF gene.This research is intended to understand EF gene in different CO2Concentration treated reaction, be
Mechanism of action between the concrete function and environment-stress of follow-up study Agasicles hygrophila EF gene provides theoretical foundation.
Summary of the invention
The object of the present invention is to provide a kind of real-time fluorescences of efficient quick detection Agasicles hygrophila EF gene expression amount
Quantification PCR primer and method.
The difference that it is another object of the present invention to design to fully understand the expression characterization of Agasicles hygrophila EF gene
Handle CO2Concentration.
To achieve the above object, the technical solution adopted in the present invention is as follows:
By feeding difference CO2The female male worm of Agasicles hygrophila for the alternanthera philoxeroides that concentration is cultivated respectively adopts 9 and manages to Eppendorf
In, it is divided into 3 biology and repeats, totally 12 groups of sample.
The primer of a pair of of detection Agasicles hygrophila EF gene expression characteristics of design, feature include meeting fluorescent quantitation
The upstream and downstream primer of PCR reaction characteristics:
EF-F:5`-TACCACGCTCACGCTCAG-3`
EF-R:5`-CGGCAAGTCCACCACAAC-3`
And the upstream and downstream primer as reference gene:
Tubulin-F: 5`-AGATGTCCGCCACCTTCA-3`
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`
The fluorescence quantitative PCR method of detection Agasicles hygrophila EF gene expression characteristics of the present invention, feature is as follows
It carries out:
(1) the first chain of cDNA synthesis: extracting the total serum IgE of sample and purifying, uses reverse transcription reagent box to obtain and is with the RNA of extraction
The cDNA that template reverse transcription obtains;
(2) Standard PCR detection is carried out to following primer
The fluorescent quantitation upstream and downstream primer of the gene:
EF-F:5`-TACCACGCTCACGCTCAG-3`
EF-R:5`-CGGCAAGTCCACCACAAC-3`
And the upstream and downstream primer as reference gene:
Tubulin-F: 5`-AGATGTCCGCCACCTTCA-3`
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`
Standard PCR amplification system is as follows:
Routine PCR reaction program is as follows: 94 DEG C of 5 min of initial denaturation, then 94 DEG C of 30 s of denaturation, and 56 DEG C of 30 s of annealing, 72 DEG C are prolonged
1 min is stretched, under this condition 35 circulations, last 72 DEG C re-extend 10min;
(3) real-time fluorescence quantitative PCR reacts:
Primer described in step (2) is added as template in the cDNA obtained using step (1), carries out quantitative fluorescent PCR reaction, each
3 repetitions are arranged in sample, are averaged after amplification.
Real-time fluorescence quantitative PCR amplification system is as follows:
Real-time fluorescence quantitative PCR response procedures are as follows: 95 DEG C of 30 s of initial denaturation, then 95 DEG C of 5 s of denaturation, 60 DEG C of annealing 30
S, 40 circulations.
The more detailed test method of the present invention is as follows:
The real-time fluorescence quantitative PCR detection method of Agasicles hygrophila EF gene can be realized by following steps:
(1) design of primers: soft using DNAMAN according to the sequence for the Agasicles hygrophila EF gene that transcript profile sequencing result obtains
Part designs the specific primer for being suitble to fluorescence quantitative PCR detection, and primer sequence is as follows:
EF-F:5`-TACCACGCTCACGCTCAG-3`
EF-R:5`-CGGCAAGTCCACCACAAC-3`
Meanwhile the sequence of the Agasicles hygrophila tubulin gene obtained according to transcript profile sequencing result, it is fixed designed for fluorescence
The primer of PCR internal reference object is measured, primer sequence is as follows:
Tubulin-F: 5`-AGATGTCCGCCACCTTCA-3`
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`
(2) Agasicles hygrophila processing test: in control CO2Concentration (420 μ LL- 1) and high CO2Concentration (750 μ LL- 1)
Alternanthera philoxeroides is cultivated in growth cabinet, for raising the female male worm of Agasicles hygrophila, different CO2The female male worm of concentration is respectively adopted
9, into Eppendorf pipe, are divided into 3 biology and repeat, totally 12 groups of samples.It is put into rapidly in liquid nitrogen and fixes after the processing of worm sample,
It is saved backup in -80 DEG C.
(3) the first chain of cDNA synthesizes: referring to Quan Shi King CompanyTransZol TMUp Plus RNA Kit kit explanation
Book extracts total serum IgE, according to the One-Step gDNA Removal and cDNA Synthesis of TransScript company
SuperMix kit specification synthesizes the first chain of cDNA.
(4) real-time fluorescence quantitative PCR reacts: real-time fluorescence quantitative PCR uses the SYBR of Takara company® Premix Ex
TaqTMKit carries out.Using the first chain of cDNA of above-mentioned synthesis as template, above-mentioned EF-F, EF-R and Tubulin-F, Tubulin-
R is specific primer, carries out quantitative fluorescent PCR program, and each sample sets 3 parallel repetitions, and the parallel Ct value of gained is taken after amplification
Average.
Real-time fluorescence quantitative PCR amplification system is as follows:
Real-time fluorescence quantitative PCR response procedures are as follows: 95 DEG C of 30 s of initial denaturation, then 95 DEG C of 5 s of denaturation, 60 DEG C of annealing 30
S, 40 circulations.
(5) calculation formula of the Agasicles hygrophila EF gene relative to the expression quantity of tubulin gene are as follows: opposite mRNA table
Up to=2-ΔΔCt× 100%, wherein Ct value=target gene Ct value-tubulin Ct value.
(6) Fig. 3 and Fig. 4 is respectively the female male worm feeding difference CO of Agasicles hygrophila2After the alternanthera philoxeroides that concentration is cultivated
The differential expression of EF gene.The result shows that with CO2The expression quantity of the raising of concentration, female male worm EF gene increases, and with turn
The expression quantity variation tendency of record group is consistent, this provides important for the research that we carry out Agasicles hygrophila EF gene in a deep going way
Basic data.
The present invention has the following advantages and effects with respect to the prior art:
(1) the different CO in the present invention2Concentration treatment measures are all suitable for insect overwhelming majority elongation factors gene, this is to complete
Face further investigation gene expression characteristics have great importance.
(2) fluorescence quantitative PCR method of efficient quick of the present invention, including quantitative fluorescent PCR program etc., practical used time 50
Min substantially reduces the reaction time compared with the existing technology, the characteristic with efficient quick.
(3) fluorescence quantitative PCR method of the present invention provides Standard PCR electrophoresis result figure, intuitively can efficiently reflect
The specificity of primer out.
Detailed description of the invention
Attached drawing is the fluorescence quantitative PCR detection result of the female male worm EF gene transcription level of Agasicles hygrophila.
Fig. 1: Agasicles hygrophila EF gene by fluorescence quantitative primer Standard PCR product electrophoresis result: product length 158
Bp,
Marker band is from top to bottom successively are as follows: 2000,1000,750,500,250,100bp.
Fig. 2: Agasicles hygrophila tubulin gene by fluorescence quantitative primer Standard PCR product electrophoresis result: product length is
199 bp, Marker band are from top to bottom successively are as follows: 2000,1000,750,500,250,100bp.
Fig. 3: Agasicles hygrophila female adult (F) feeding difference CO2The difference of EF gene after the alternanthera philoxeroides that concentration is cultivated
Expression, cylindricality and left side reference axis are the expression quantity of fluorescent quantitation, and scatterplot and the right reference axis are the expression quantity of transcript profile.
Fig. 4: Agasicles hygrophila male worm (M) feeding difference CO2The difference of EF gene after the alternanthera philoxeroides that concentration is cultivated
Expression, cylindricality and left side reference axis are the expression quantity of fluorescent quantitation, and scatterplot and the right reference axis are the expression quantity of transcript profile.
Specific embodiment
Illustrate that the present invention, the scheme of embodiment described here do not limit invention below in conjunction with specific embodiments and drawings,
His any changes, modifications, substitutions, combinations, simplifications done without departing from the spirit and principles of the present invention, should be equivalent
Substitute mode, be included within the scope of the present invention.
Embodiment 1
The processing of test material
In control CO2Concentration (420 μ LL- 1) and high CO2Concentration (750 μ LL- 1) growth cabinet in cultivate hollow lotus seeds
Grass, for raising the female male worm of Agasicles hygrophila, different CO2The female male worm of concentration respectively adopts 9 into Eppendorf pipe, is divided into 3
A biology repeats, totally 12 groups of samples.Worm sample is put into rapidly in liquid nitrogen after collecting and fixes, and saves backup in -80 DEG C.
Embodiment 2
The design of primer
(1) it design of primers: according to the sequence for the Agasicles hygrophila EF gene that transcript profile is sequenced, is set using DNAMAN software
The specific primer for being suitble to fluorescence quantitative PCR detection is counted, primer sequence is as follows:
EF-F:5`-TACCACGCTCACGCTCAG-3`
EF-R:5`-CGGCAAGTCCACCACAAC-3`
Agasicles hygrophila EF gene by fluorescence quantitative PCR product length is 158 bp, agarose gel electrophoresis results display amplification
Product length afterwards is consistent, and is single band, illustrates that designed primer has very strong specificity, suitable for glimmering in real time
Fluorescent Quantitative PCR detection, agarose gel electrophoresis results are as shown in Figure 1.
(2) simultaneously, the sequence for the Agasicles hygrophila tubulin gene being sequenced according to transcript profile, designed for glimmering
The primer of Fluorescent Quantitative PCR internal reference object, primer sequence are as follows:
Tubulin-F: 5`-AGATGTCCGCCACCTTCA-3`
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`
Agasicles hygrophila tubulin gene by fluorescence quantitative PCR product length is 199 bp, and agarose gel electrophoresis results are shown
Product length after amplification is consistent, and is single band, illustrates that designed primer has very strong specificity, suitable for real
When fluorescence quantitative PCR detection, agarose gel electrophoresis results are as shown in Figure 2.
Embodiment 3
The extraction of total serum IgE
Referring to Quan Shi King CompanyTransZol TMUp Plus RNA Kit kit specification extracts total serum IgE, will with liquid nitrogen
Polypide is pulverized, and 1ml is addedTransZol TMUp goes to 1.5 ml and turns in centrifuge tube, after being stored at room temperature 5 min, is added
200 μ L chloroforms/1 mlTransZol TMUp acutely vibrates 30 s, is incubated at room temperature 3 min.4 DEG C of 10000 g centrifugation 15
After min, upper strata aqueous phase (generally < 80%) is moved in new centrifuge tube, the dehydrated alcohol of 1/3 volume is added, is gently mixed by inversion.
RNA centrifugal column is placed in 2 ml collecting pipes, upper step mixture is all transferred in centrifugal column, 12000 g, 30 ~ 60 s centrifugation,
Mobile phase is abandoned, collecting pipe is reused.500 μ LCB9 are added, 12000 g of room temperature is centrifuged 30 s, abandons mobile phase, adds 500
μ LCB9,12000 g of room temperature are centrifuged 30 s, abandon mobile phase.Diluted 500 μ LWB9 is added, 12000 g are centrifuged 30 s, abandoned stream
Dynamic phase adds diluted 500 μ LWB9, and 12000 g are centrifuged 30 s, abandons mobile phase.12000 g are centrifuged 2 min, thoroughly go
Except remaining ethyl alcohol, centrifugal column is thoroughly dried being stored at room temperature several minutes.Centrifugal column is put into RNase-free Tube, is added
50 μ LRNase-free Water are stored at room temperature 1 min in the center of centrifugal column, and 12000 g are centrifuged 1 min, eluted rna.Institute
RNA be placed in -80 DEG C it is spare.
Embodiment 4
The first chain of cDNA synthesis: according to the One-Step gDNA Removal and cDNA of TransScript company
Synthesis SuperMix kit specification step, using the RNA in embodiment 3 as template, reverse transcription generates cDNA first
Chain, the specific steps are as follows:
(1) reverse transcription system
(2) 42 DEG C of 30 min of incubation.
(3) 85 DEG C of 5 min of heating, product can be placed on -20 DEG C, -80 DEG C of preservations.
Embodiment 5
Carry out quantitative fluorescent PCR reaction.Real-time fluorescence quantitative PCR uses the SYBR of Takara company® Premix Ex TaqTM
Kit carries out.Using the cDNA in embodiment 4 as template, it is anti-that real-time fluorescence quantitative PCR amplification is carried out with the primer in embodiment 2
It answers, each sample sets 3 parallel repetitions, and the average of the parallel Ct value of gained is taken after amplification.
(1) real-time fluorescence quantitative PCR amplification system is as follows:
(2) real-time fluorescence quantitative PCR response procedures are as follows: 95 DEG C of 30 s of initial denaturation, then 95 DEG C of 5 s of denaturation, 60 DEG C of annealing
30 s, 40 circulations.
(3) after the completion of real-time fluorescence quantitative PCR, the ratio 2 of relative expression quantity under the conditions of different disposal is calculated according to Ct value-ΔΔCt.Calculation formula of the Agasicles hygrophila EF gene relative to the expression quantity of tubulin gene are as follows: opposite mRNA expression=2-ΔΔCt× 100%, wherein Ct value=target gene Ct value-tubulin Ct value.
Table 1: Agasicles hygrophila female adult (F) feeding difference CO2The C (T) of EF gene after the alternanthera philoxeroides that concentration is cultivated
Value, average value, standard deviation, fluorescent quantitation expression quantity and transcript profile expression quantity
Table 2: Agasicles hygrophila male worm (M) feeding difference CO2It is C (T) value of EF gene after the alternanthera philoxeroides that concentration is cultivated, flat
Mean value, standard deviation, fluorescent quantitation expression quantity and transcript profile expression quantity
(4) Fig. 3 and Fig. 4 is respectively the female male worm feeding difference CO of Agasicles hygrophila2EF base after the alternanthera philoxeroides that concentration is cultivated
The differential expression of cause.The result shows that with CO2The expression quantity of the raising of concentration, female male worm EF gene increases, with transcript profile
The variation tendency of expression quantity up-regulation is consistent.This provides important for the research that we carry out Agasicles hygrophila EF gene in a deep going way
Basic data.
SEQUENCE LISTING
<110>Inst. of Plant Protection, fujian Academy of Agricultural Science
<120>primer and method of Agasicles hygrophila EF gene expression characteristics are detected
<130> 4
<160> 4
<170> PatentIn version 3.3
<210> 1
<211> 18
<212> DNA
<213>artificial sequence
<400> 1
taccacgctc acgctcag 18
<210> 2
<211> 18
<212> DNA
<213>artificial sequence
<400> 2
cggcaagtcc accacaac 18
<210> 3
<211> 18
<212> DNA
<213>artificial sequence
<400> 3
agatgtccgc caccttca 18
<210> 4
<211> 24
<212> DNA
<213>artificial sequence
<400> 4
gcctcttggt attgttggta ttca 24
Claims (2)
1. a kind of fluorescence quantification PCR primer for detecting Agasicles hygrophila EF gene expression characteristics, it is characterised in that: including meeting
The upstream and downstream primer of quantitative fluorescent PCR reaction characteristics:
EF-F:5`-TACCACGCTCACGCTCAG-3`,
EF-R:5`-CGGCAAGTCCACCACAAC-3`;
And the upstream and downstream primer as reference gene:
Tubulin-F:5`-AGATGTCCGCCACCTTCA-3`,
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`。
2. a kind of quantitative fluorescent PCR side using primer detection Agasicles hygrophila EF gene expression characteristics described in claim 1
Method, it is characterised in that: as follows:
(1) the first chain of cDNA synthesis: extracting the total serum IgE of sample and purifying, uses reverse transcription reagent box to obtain and is with the RNA of extraction
The cDNA that template reverse transcription obtains;
(2) Standard PCR detection is carried out to following primer
The fluorescent quantitation upstream and downstream primer of the gene:
EF-F:5`-TACCACGCTCACGCTCAG-3`
EF-R:5`-CGGCAAGTCCACCACAAC-3`
And the upstream and downstream primer as reference gene:
Tubulin-F: 5`-AGATGTCCGCCACCTTCA-3`
Tubulin-R: 5`-GCCTCTTGGTATTGTTGGTATTCA-3`
Standard PCR amplification system is 25 μ L:10 × buffer, 2.5 μ L, dNTP 1.0 μ L, 0.5 μ L of upstream primer, downstream primer
0.5 μ L, 100ng/ μ L cDNA template 1.0 μ L, Ex-TaqE 0.15 μ L, 19.35 μ L of water;
Routine PCR reaction program are as follows: 94 DEG C of 5 min of initial denaturation, then 94 DEG C of 30 s of denaturation, 56 DEG C of 30 s of annealing, 72 DEG C are prolonged
1 min is stretched, under this condition 35 circulations, last 72 DEG C re-extend 10min;
(3) real-time fluorescence quantitative PCR reacts:
Primer described in step (2) is added as template in the cDNA obtained using step (1), carries out quantitative fluorescent PCR reaction, each
3 repetitions are arranged in sample, are averaged after amplification;
Real-time fluorescence quantitative PCR amplification system are as follows: SYBR® Premix Ex TaqTM 12.5 μ L, 0.5 μ L of upstream primer, downstream
0.5 μ L, 100ng/ μ L cDNA of primer, 1.0 μ L, supplies water to 25 μ L;
Real-time fluorescence quantitative PCR response procedures are as follows: 95 DEG C of 30 s of initial denaturation, then 95 DEG C of 5 s of denaturation, 60 DEG C of 30 s of annealing,
40 circulations.
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