CN104211809B - Application of synthetic transcription factor VP64-linker-Os03g11370 to improve paddy rice grain properties - Google Patents

Application of synthetic transcription factor VP64-linker-Os03g11370 to improve paddy rice grain properties Download PDF

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CN104211809B
CN104211809B CN201310214040.1A CN201310214040A CN104211809B CN 104211809 B CN104211809 B CN 104211809B CN 201310214040 A CN201310214040 A CN 201310214040A CN 104211809 B CN104211809 B CN 104211809B
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os03g11370
paddy rice
gene
linker
primer
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CN104211809A (en
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李宏宇
张春雨
刘斌
赵涛
刘军
林辰涛
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Institute of Crop Sciences of Chinese Academy of Agricultural Sciences
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Institute of Crop Sciences of Chinese Academy of Agricultural Sciences
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Abstract

The invention provides fusion protein (VP16) 4-linker-Os03g11370, wherein linker is formed by 39 flexible amino acids in serial connection, VP16 is VP16 protein coming from herpes simplex virus, and Os03g11370 is a paddy rice transcription factor Os03g11370. The invention also provides a gene encoding the fusion protein and application thereof to increase the grain length, the grain width and the thousand seed weight of paddy rice. The CDS sequence of the transcription factor gene Os03g11370 is constructed at the downstream of four VP16 sequences through a Gateway system for transforming paddy rice and enabling the grain of transgenic paddy rice to be lengthen and widen. The method for improving the paddy rice grain properties, and lengthening and widening grains has important theoretical value on illustrating the molecule mechanism of regulation and control on change of paddy rice grains. Through the transgenosis means, the paddy rice grains are lengthen and widen, so that the method has important application value to improve paddy rice output during production.

Description

Synthesis type transcription factor VP64-linker-Os03g11370 is in improvement rice grain The application of shape aspect
Technical field
The invention belongs to field of genetic engineering, it is related to the application of rice transcription factor Os03g11370 gene, specifically, relate to And application in terms of improvement rice grain proterties for synthesis type transcription factor VP64-linker-Os03g11370.
Background technology
Paddy rice (OryZa sativa L.) it is the important cereal crops of China and the whole world, the world more than 1/2 population is with water Rice is staple food, therefore the concern of rice yield traits extremely scientists all the time, and rice grain size to be then impact produce One of principal element of amount.In addition, paddy rice is as the model plant of crops gene functional research, relative science of heredity and Molecular biology research is constantly subjected to the attention of researchers.Rice grain grow be one orderly, selectively Gene expression process, transcription factor serves critical effect in the accuracy controlling of its gene expression.
In recent years, the molecular genetic regulatory mechanism about seed size proterties is studied, achieved with certain progress, such as:Grind The persons of studying carefully located some seed size related genes using QTL, and wherein GS3 encodes a memebrane protein, is seed size and device The negative regulatory factor of official's size;The research such as Zhang Qifa finds that GS5 encodes the serine carboxypeptidase of a regulation seed size, is control The positive regulating factor of seed size processed, overexpression GS5 can make rice grain substantially become big;Transcription factor is in regulation and control seed size side Face plays very important effect, and OsWRKY78 can adjust the elongation of rice stem and the growth of seed, OsWRKY78 mutant Cane can be made to become and to downgrade impact Grain Development;Helix-loop-helix protein (bHLH) class transcription factor can by regulate and control lemma and The size of the effect length grain of glumelle cell;PGL1 bHLH protein (bHLH)Heterodimer is as combination Seed length and weight can be increased after the repressor overexpression of the bHLH of DNA.
VP16 finds in animal virus gene, has been widely applied in plant, has been mainly used in plant gene The research of transcriptional control in.Transcription factor effect in vivo is generally segmented into two kinds:A kind of is transcriptional enhancer, separately A kind of sub for Transcription inhibition.After transcription factor and the fusion of VP16 functional domain motif, it will strengthen the function of transcription factor, Thus more obvious character mutation occurs in transfer-gen plant.
Content of the invention
It is an object of the invention to provide the application of rice transcription factor Os03g11370 gene.
In order to realize the object of the invention, the invention provides a kind of fusion protein(VP16)4-Linker-Os03g11370, Wherein, linker is in series by 39 flexible amino acid;VP16 is from herpes simplex virus(Herpes simplex virus)VP16 albumen;Os03g11370 is rice transcription factor Os03g11370.
Preferably, described fusion protein(VP16)4- linker-Os03g11370 is:
(1)The protein of the amino acid sequence composition shown in SEQ ID NO.1;
(2)Amino acid sequence shown in SEQ ID No.1 is substituted, lacks or adds one or several amino acid and has Equal function by(1)Derivative protein.
Present invention also offers described fusion protein(VP16)4The encoding gene of-linker-Os03g11370 it is preferable that Described gene is VP64-linker-Os03g11370.
The nucleotides sequence of described gene VP64-linker-Os03g11370 is classified as:
(1)Nucleotide sequence shown in SEQ ID NO.2;
(2)Under strict conditions, Neng Gouyu(1)The nucleotide sequence of shown nucleotide sequence hybridization;Wherein, described strict Condition is 65 DEG C, hybridizes and wash film in 0.1 × SSPE or 0.1 × SSC, the solution of 0.1%SDS.
Wherein, the nucleotide sequence of described Os03g11370 is as shown in SEQ ID No.3, its amino acid sequence such as SEQ ID Shown in No.4;Described linker(Connexon)Nucleotide sequence as shown in SEQ IDNo.5, its amino acid sequence such as SEQ ID Shown in No.6;Described VP64(4×VP16)Nucleotide sequence as shown in SEQ IDNo.7, its amino acid sequence such as SEQ ID Shown in No.8, in its amino acid sequence, Asp Ala Leu Asp Asp Phe Asp Leu Asp Met Leu represents VP16 sequence Row, Gly Ser is the intervening sequence connecting VP16.
The present invention also provides the expression vector containing VP64-linker-Os03g11370 gene.Described carrier is any one The carrier that bootable foreign gene is expressed in host.Preferably, described carrier is plant binary expression vector(For example, pCAMBIA1301).By encoding said fusion protein of the present invention gene constructed in plant expression vector when, can be in its turn Add any one strong promoter before record initiation nucleotide(For example, corn strong promoter Ubiquitin)Or inducible promoter.This Outward, by encoding said fusion protein of the present invention gene constructed in plant expression vector when, enhancer can also be used, and These enhancer regions must be identical with the reading frame of coded sequence, the translation to guarantee whole piece sequence.
It is further preferred that described carrier is expression vector ubi:VP64-Os03g11370, its construction method includes as follows Step:
(1)With the fine blade of paddy rice Japan as material, extract total serum IgE, reverse transcription obtains cDNA.
(2)According to Gateway clone technology, carry out two-wheeled PCR, first round pcr template is cDNA, primer is forward primer F1 and reverse primer R1;Second wheel pcr template is the PCR primer of the first round, and primer is attB5'adaptor and attB3' adaptor;The PCR primer of the second wheel is cloned on pDONER carrier, sequencing identification is correctly reacted by LR afterwards will Os03g11370 is building up on carrier nVP64-hyg-asRED, obtains carrier ubi:VP64-linker-Os03g11370(Lower letter Referred to as ubi:VP64-Os03g11370);
Forward primer F1:5'-caaaaaagca ggcttcatgg aggaccagat ggctaacc-3'(SEQ ID No.9);Reverse primer R1:5'-caagaaagct gggtcctcga gggtggtgcc gtc-3'(SEQ ID No.10);
attB5'adaptor:5'-gtggggacaa gtttgtacaa aaaagcaggc ttc-3'(SEQ IDNo.11);attB3'adaptor:5'-gtggggacca ctttgtacaa gaaagctggg tc-3'(SEQID No.12).
Step(1)Described in method be conventional method, specifically, the step that reverse transcription obtains cDNA is as follows:
(1)Sequentially add following material on ice in the PCR reaction tube without nuclease:Total serum IgE 6 μ l(0.1ng-5μ g), Oligo(dT)18 primer 1 μ l, without the ddH of nuclease2O 5 μ l, is placed in 65 DEG C of reaction 5min in PCR instrument;(2)Then again Add following material:5 × reaction buffer 4 μ l, RNase inhibitor 1 μ l, 10mM dNTP2 μ l, M-M μ lV reverse transcriptase 1 μ l, Gently mix, 45 DEG C of reaction 60min in PCR instrument;(3)In PCR instrument, 70 DEG C of 5min, terminating reaction.
Step(2)In, the reaction system of first round PCR amplification is:2 × reaction buffer 25 μ l, dNTP4 μ l, ddH2O18.5 μ l, Taq archaeal dna polymerase 0.5 μ l, each 0.5 μ l of 1 μ l cDNA, forward and reverse primer.
Response procedures are:98 DEG C of denaturations 3min of thermal starting;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C of 1min, 30 Circulation;72 DEG C of extension 10min, last 25 DEG C of reactions terminate.
The reaction system of the second wheel PCR amplification is identical with first round PCR.
Second wheel PCR response procedures be:98 DEG C of denaturations 3min of thermal starting;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C 1min, 6 circulations;72 DEG C of extension 10min, last 25 DEG C of reactions terminate.
Forward primer F1 described in first round PCR and reverse primer R1 is the primer adding part adaptor attB joint, produces Thing is Os03g11370 complete sequence+part attB joint;Primer attB5'adaptor and attB3' described in second wheel PCR Adaptor is complete adaptor attB primer, and product is Os03g11370+ complete attB joint.
The building process of plant expression vector nVP64-hyg-asRED is:With binary expression vector pCAMBIA1300 about The sequence that border comprises is frame sequence, by vitro recombination, by ubi promoter-VP64-Gateway expression unit, 35S Promoter-asRED expression unit and 35S promoter-hyg expression unit construct therewith and obtain.
NVP64-hyg-asRED carrier complete sequence is as shown in SEQ ID No.13;Carrier ubi:VP64-Os03g11370 is complete Sequence is as shown in SEQ ID No.14.
Present invention also offers the host cell containing VP64-linker-Os03g11370 gene or described expression vector.
The present invention also provides the engineering bacteria containing VP64-linker-Os03g11370 gene or described expression vector.
VP64-linker-Os03g11370 gene is synthesis type transcription factor, and it can improve the proterties of rice grain. The present invention also provide VP64-linker-Os03g11370 gene increase that paddy rice grain length, grain be wide and mass of 1000 kernel in application.Institute State the expression that application is by VP64-linker-Os03g11370 gene or containing VP64-linker-Os03g11370 gene to carry In body conversion Introduced into Rice cell, screening simultaneously finally obtains transgenic paddy rice.
The present invention further provides the application of rice transcription factor Os03g11370 gene, it is by rice transcription factor The CDS sequence of Os03g11370 gene(Complete translation area)It is building up to the downstream of 4 transcription factor activation motif VP16, conversion is planted Thing, screening simultaneously finally obtains genetically modified plants.
Aforesaid application, it is that the CDS sequence of rice transcription factor Os03g11370 gene is passed through Gateway system structure It is built to the downstream of 4 transcription factor activation motif VP16, rice transformation(For example, rice varieties ' kitaake '), screening is simultaneously finally Obtain transgenic paddy rice, so that transgenic paddy rice seed is elongated, broaden.Wherein, rice transcription factor Os03g11370 gene The nucleotides of CDS sequence as shown in SEQ ID No.3, the nucleotide sequence such as SEQ ID of 4 transcription factor activation motif VP16 Shown in No.7.
VP64-linker-Os03g11370 gene or the table carrying coding VP64-linker-Os03g11370 gene Reaching carrier can be by using the standard biologic technical side such as Ti-plasmids, plant viral vector, directly delivered DNA, microinjection, electroporation Method imports in plant cell(Weissbach, 1998, Method for Plant Molecular Biology VIII, Academy Press, New York, the 411-463 page;Geiserson and Corey, 1998, Plant Molecular Biology, 2nd Edition).
The present invention utilizes transcription factor activation motif VP64 first(I.e. 4 transcription factor activation motif VP16)Turn with paddy rice Record factor Os03g11370 Gene Fusion builds and obtains synthesis type transcription factor, and is transformed into crops(As paddy rice), and make to turn Trans-genetic hybrid rice seed is substantially elongated, broaden, mass of 1000 kernel increases, and has preferable yield potential.
The improvement grain characters that the present invention obtains, make seed elongated, the method broadening, and become for elaborating rice grain Change the molecule mechanism of regulation and control, there is important theory value, and transgenic approach can be passed through, make rice grain elongated, become Width, therefore has important using value for raising rice yield aborning.
Brief description
Fig. 1 is nVP64-hyg-asRED Vector map in the embodiment of the present invention 1.
Fig. 2 is ubi in the embodiment of the present invention 1:VP64-Os03g11370 Vector map.
Fig. 3 is that Western blot of the present invention detects ubi:VP64-Os03g11370 transgenic positive strain, wherein WT is Wild rice ' kitaake ', V1475H-08, V1475H-12 are ubi:VP64-Os03g11370 transgenic paddy rice strain.
Fig. 4 is the phenotype of the grain length proterties of transgenic paddy rice seed of the present invention, and wherein WT is wild rice ' kitaake ', V1475H-08, V1475H-12 are ubi:VP64-Os03g11370 transgenic paddy rice strain.
Fig. 5 is the phenotype of the wide proterties of grain of transgenic paddy rice seed of the present invention, and wherein WT is wild rice ' kitaake ', V1475H-08, V1475H-12 are ubi:VP64-Os03g11370 transgenic paddy rice strain.
Fig. 6 is transgenic paddy rice grain characters data statistic analysis of the present invention, and wherein WT is wild rice ' kitaake ', V1475H-08, V1475H-12 are ubi:VP64-Os03g11370 transgenic paddy rice strain.
Specific embodiment
Following examples are used for the present invention is described, but are not limited to the scope of the present invention.Without departing substantially from present invention spirit In the case of essence, the modification that the inventive method, step or condition are made or replacement, belong to the scope of the present invention.
If not specializing, in the embodiment of the present invention, experiment material used, reagent and instrument etc. are all commercially available, if Do not particularly point out, the conventional meanses that in embodiment, technological means used is well known to the skilled person.
The fine paddy rice of Japan, paddy rice ' kitaake ' are known in the art public kind.
PDONER carrier is purchased from Invitrogen company.
Reverse Transcriptase kit is purchased from Invitrogen company.
Hygromycin is purchased from Shanghai Niu Jin Bioisystech Co., Ltd.
The separation of embodiment 1Os03g11370 gene and plant expression vector construction
1st, design primer
In plant transcription factor database(http://planttfdb.cbi.edu.cn/index.php?sp=Osj)In Find Os03g11370 gene, according to its sequences Design pcr amplification primer thing, wherein forward primer F1:5'-caaaaaagca ggcttcatgg aggaccagat ggctaacc-3'(SEQ ID No.9);Reverse primer R1:5'-caagaaagct gggtcctcga gggtggtgcc gtc-3'(SEQ ID No.10);
2nd, plant expression vector ubi:VP64-Os03g11370 builds
With the fine blade of paddy rice Japan as material, TRIzol method extracts total serum IgE, and reverse transcription obtains cDNA, the reaction of reverse transcription Step is as follows:(1)Sequentially add following material on ice in the PCR reaction tube without nuclease:Total serum IgE 6 μ l(0.1ng-5μ g), Oligo(dT)18 primer 1 μ l, without the ddH of nuclease2O5 μ l, is placed in 65 DEG C of reaction 5min in PCR instrument;(2)Then again Add following material:5 × reaction buffer 4 μ l, RNase inhibitor 1 μ l, 10mM dNTP2 μ l, M-M μ lV reverse transcriptase 1 μ l, Gently mix, 45 DEG C of reaction 60min in PCR instrument;(3)In PCR instrument, 70 DEG C of 5min, terminating reaction.
Enter performing PCR according to PrimeSTAR polymeric enzymatic amplification system and response procedures.Wanting according to Gateway clone technology Ask, during this, comprise two-wheeled PCR, with cDNA as template, primer is to add drawing of part adaptor attB joint to first round PCR Thing(Forward primer F1 and reverse primer R1), product is Os03g11370 complete sequence+part attB joint;First round PCR expands Reaction system be:2 × reaction buffer 25 μ l, dNTP4 μ l, ddH2O18.5 μ l, Taq archaeal dna polymerase 0.5 μ l, 1 μ l The each 0.5 μ l of cDNA, forward and reverse primer.Response procedures are 98 DEG C of denaturations 3min of thermal starting;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C of 1min, 30 circulations;72 DEG C of extension 10min, last 25 DEG C of reactions terminate.
The template of the second wheel PCR is the PCR primer of the first round, and primer is complete adaptor attB primer:attB5' adaptor:5'-gtggggacaa gtttgtacaa aaaagcaggc ttc-3'(SEQ ID No.11);attB3' adaptor:5'-gtggggacca ctttgtacaa gaaagctggg tc-3'(SEQ ID No.12), product is Os03g11370+ complete attB joint.
The amplification system of the second wheel PCR is identical with the amplification system of first round PCR.
Second wheel PCR response procedures be:98 DEG C of denaturations 3min of thermal starting;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C 1min, 6 circulations;72 DEG C of extension 10min, last 25 DEG C of reactions terminate.
The PCR primer of the second wheel is cloned on pDONER carrier, obtains through sequencing identification identical with genes of interest Sequence.Os03g11370 is building up to by nVP64-hyg-asRED by LR reaction(Fig. 1, carrier complete sequence such as SEQ ID Shown in No.13)On, obtain carrier ubi:VP64-linker-Os03g11370, hereinafter referred to as ubi:VP64-Os03g11370 (Fig. 2, carrier complete sequence is as shown in SEQ ID No.14).
The building process of plant expression vector nVP64-hyg-asRED is:With binary expression vector pCAMBIA1300 about The sequence that border comprises is frame sequence, by vitro recombination, by ubi promoter-VP64-Gateway expression unit, 35S Promoter-asRED expression unit and 35S promoter-hyg expression unit construct therewith and obtain.
Fusion protein(VP16)The amino acid sequence of 4-linker-Os03g11370 as shown in SEQ ID NO.1, gene The nucleotide sequence of VP64-linker-Os03g11370 is as shown in SEQ ID NO.2;The nucleotides of Os03g11370 complete sequence , as shown in SEQ ID NO.3, amino acid sequence is as shown in SEQ ID NO.4 for sequence;Described linker(Connexon)Nucleotides , as shown in SEQ IDNo.5, its amino acid sequence is as shown in SEQ ID No.6 for sequence;Described VP64(4×VP16)Nucleotides , as shown in SEQ IDNo.7, its amino acid sequence is as shown in SEQ ID No.8 for sequence.
The acquisition of embodiment 2 transgenic rice plant
Water intaking rice ' kitaake ' mature seed, manually or mechanically shells, the seed selecting full bright and clean no bacterial plaque is sterilized It is inoculated into afterwards on inducing culture and carry out Fiber differentiation.Select outward appearance good, the good Rice Callus of growing power are acceptor Material, using agrobacterium-mediated transformation by ubi:VP64-Os03g11370 proceeds in Rice Callus, with containing 100 μM of second The AAM conversion fluid of the acyl syringone and O.D. value Agrobacterium for 0.7 is converted, and the callus that conversion fluid was soaked is put Co-cultured on base in co-culturing, be placed on screening and culturing medium after 25 DEG C of light culture 3d and cultivate about 30d, every 10d subculture is once. Then the kanamycin-resistant callus tissue sifting out is transferred to and about 20d is broken up on differential medium, every 10d subculture is once.Green will be differentiated little The kanamycin-resistant callus tissue of seedling is transferred to and is taken root on root media, grows hardening after flourishing root system after about 7d, and calculates conversion and obtained turn Gene vaccine number.It is transferred to grown in field after hardening 7d.Obtain 26 plants of transgenic paddy rice through hygromycin selection altogether.
Wherein, inducing culture, co-cultivation base, screening and culturing medium, differential medium, the formula of root media are this Field conventional formulation.
Wherein, Fiber differentiation based formulas are:A large amount of micro+the NB of+B5 of N6 is organic+molysite+copper cobalt mother liquor+2.5mg/L2,4D+ 0.6g/L acid hydrolyzed casein+2.878g/L proline+0.5g/L glutamine+30g/L sucrose, is prepared with water, adjusts pH to 5.8 Plant gel 4g/L is added after~5.9.
1L copper cobalt mother liquor(2000×)Formula:
KI1.5g
Na2MoO4·2H2O0.5g
CuSO4·5H2O0.05g
CoCl2·6H2O0.05g.
Co-culturing based formulas is:A large amount of micro+the NB of+B5 of N6 is organic+and molysite+2.5mg/L2,4D+0.5g/L glutamine+ 0.6g/L acid hydrolyzed casein+10g/L glucose+30g/L sucrose, is prepared with water, adds plant gel 4g/ after adjusting pH to 5.2 L.After sterilizing, 50 DEG C about addition AS(Acetosyringone)100~200 μ g/mL.
Screening and culturing based formulas are:A large amount of micro+the NB of+B5 of N6 is organic+molysite+copper cobalt mother liquor+2.5mg/L2,4D+0.6g/ L acid hydrolyzed casein+2.878g/L proline+0.5g/L glutamine+30g/L sucrose, is prepared with water, adjusts pH to 5.8~5.9 Add plant gel 4g/L afterwards.35mg/L hygromycin is added after sterilizing.
Differential medium formula is:A large amount of micro+the MS of+MS of MS is organic+molysite+copper cobalt mother liquor+0.05mg/L NAA+ 2.0mg/L Kinetin(Kinetin)+ 30g/L sorbierite+2g/L caseinhydrolysate+30g/L sucrose, is prepared with water, adjusts pH extremely Plant gel 4g/L is added after 5.8~5.9.
Root media:A large amount of micro+the MS of+MS of MS is organic+molysite+copper cobalt mother liquor+caseinhydrolysate(1g/L)+ sucrose (30g/L), after adjusting pH5.8~5.9, add plant gel 4g/L.The identification of embodiment 3 transgenic positive strain
For detecting ubi:VP64-Os03g11370 is in T2 generation(T0, on behalf of first transfonning regrowth, is produced by this T0 generation breeding Seed and the plant being grown up to by it be T1 generation, the seed being produced by this T1 generation breeding and the plant being grown up to by it are T2 Generation)Overexpression situation in transgenic paddy rice, is identified to it using VP64 antibody, through SDS- on protein level PAGE protein electrophoresis → immunoblotting analysis → Immunofluorescence Reactions, Western Blot qualification result shows that transfer-gen plant has mesh Albumen, and wild type not miscellaneous go out band(Fig. 3, Rubisco are internal reference).
Specific Western Blot experiment flow is as follows:By T2 for transgenic paddy rice(ubi:VP64-Os03g11370 turns Trans-genetic hybrid rice strain)The blade of V1475H-08, V1475H-12 and wild type ' kitaake ' blade put into grinding after liquid nitrogen frost Become powder, add appropriate sample-loading buffer to mix, 12000rpm is centrifuged 10 minutes;Take 5 μ l supernatant sample-addings, with 90V voltage SDS- After PAGE electrophoresis 30 minutes, 120V electrophoresis 60-90 minute, when the bottom that bromophenol blue reaches gel can stop electrophoresis;After electrophoresis Using half-dried transfer method transferring film, and with Ponceaux dyeing liquor, film is dyeed, observe transferring film effect;After transferring film finishes, by film Put into closing room temperature in the PBST solution of the skimmed milk power containing 5% and close 60 minutes or 4 DEG C overnight;Room temperature next anti-(VP64 resists Body) incubation 1 hour or 4 DEG C of overnight incubation, 3 times are then washed with PBST, 5 minutes every time;Under room temperature, two resist(Goat-anti rabbit, is purchased from Abmart, article No. M21002S)Incubation 1 hour, then washs 3 times with PBST, 5 minutes every time;Film adds substrate, carries out Exposure.
Wherein, VP64 antibody is by Ai Bimate biological medicine(Shanghai)Co., Ltd closes according to the amino acid sequence of VP64 Become the rabbit source that polypeptide is prepared as specific antigen to resist more.
Embodiment 4 transgenic paddy rice phenotype analytical and species test analysis
The T2 that the present invention is obtained is for the seed of transgenic paddy rice V1475H-08, V1475H-12 and wild type (‘kitaake’)Rice paddy seed is compared, and Fig. 4 is the phenotype for the grain length proterties of transgenic paddy rice seed for the T2 of the present invention, Fig. 5 For T2 of the present invention for the wide proterties of grain of transgenic paddy rice seed phenotype, as shown in Figure 4 and Figure 5, T2 is for the seed of transgenic paddy rice Grain substantially elongated, broaden, therefore, beyond all doubt, T2 also substantially increases for the mass of 1000 kernel of transgenic paddy rice seed.
Fig. 6 is the grain characters data statistic analysis for transgenic paddy rice V1475H-08, V1475H-12 for the T2 of the present invention.Number According to analysis shows, T2 is all noticeably greater than wild rice ' kitaake ' seed for the length and width of transgenic paddy rice seed.
Although, above used general explanation, specific embodiment and test, the present invention made retouch in detail State, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art 's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed Scope.

Claims (9)

1. a kind of fusion protein is it is characterised in that described fusion protein is (VP16)4-linker-Os03g11370;
Wherein, linker is in series by 39 flexible amino acid;VP16 is the VP16 albumen from herpes simplex virus; Os03g11370 is rice transcription factor Os03g11370;
The amino acid sequence of described fusion protein is as shown in SEQ ID NO.1.
2. the gene of fusion protein described in coding claim 1.
3. gene according to claim 2 it is characterised in that described gene be VP64-linker-Os03g11370, its Nucleotides sequence is classified as the nucleotide sequence shown in SEQ ID NO.2.
4. the expression vector containing gene described in Claims 2 or 3.
5. carrier according to claim 4 is it is characterised in that described carrier is expression vector ubi:VP64- Os03g11370, its construction method comprises the steps:
(1) with the fine blade of paddy rice Japan as material, extract total serum IgE, reverse transcription obtains cDNA;
(2) according to Gateway clone technology, carry out two-wheeled PCR, first round pcr template be cDNA, primer be forward primer F1 and Reverse primer R1;Second wheel pcr template is the PCR primer of the first round, and primer is attB 5'adaptor and attB 3' adaptor;The PCR primer of the second wheel is cloned on pDONER carrier, sequencing identification is correctly reacted by LR afterwards will Os03g11370 is building up on nVP64-hyg-asRED, obtains carrier ubi:VP64-Os03g11370;
Forward primer F1:5'-caaaaaagca ggcttcatgg aggaccagat ggctaacc-3',
Reverse primer R1:5'-caagaaagct gggtcctcga gggtggtgcc gtc-3';
attB 5'adaptor:5'-gtggggacaa gtttgtacaa aaaagcaggc ttc-3',
attB 3'adaptor:5'-gtggggacca ctttgtacaa gaaagctggg tc-3'.
6. carrier according to claim 5 is it is characterised in that in step (2), the reaction system of first round PCR amplification is: 2 × reaction buffer 25 μ l, dNTP 4 μ l, ddH2O18.5 μ l, Taq archaeal dna polymerase 0.5 μ l, 1 μ l cDNA, forward and reverse primer Each 0.5 μ l;Response procedures are 98 DEG C of denaturations 3min of thermal starting;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C of 1min, 30 are followed Ring;72 DEG C of extension 10min, last 25 DEG C of reactions terminate;
The reaction system of the second wheel PCR amplification is identical with first round PCR;Second wheel PCR response procedures be:98 DEG C of thermal starting is pre- Denaturation 3min;98 DEG C of 10s of initial action, 57 DEG C of 5s, 72 DEG C of 1min, 6 circulations;72 DEG C of extension 10min, last 25 DEG C of reaction knots Bundle.
7. the host cell containing carrier described in any one of claim 4-6.
8. the gene described in Claims 2 or 3 or carrier described in any one of claim 4-6 increase paddy rice grain length, grain wide and Application in mass of 1000 kernel.
9. application according to claim 8 is it is characterised in that it is will by the gene described in Claims 2 or 3 or right Seek carrier rice transformation described in any one of 4-6, screening obtains transgenic paddy rice.
CN201310214040.1A 2013-05-31 2013-05-31 Application of synthetic transcription factor VP64-linker-Os03g11370 to improve paddy rice grain properties Expired - Fee Related CN104211809B (en)

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