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MCLAB/I-5™ Hotstart DNA Polymerase/I5HD-100/1 Ea

价格
¥2950.00
货号:I5HD-100
浏览量:127
品牌:MCLab
服务
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商品描述

I-5Hi-FiDNAHotStartPolymeraseisahigh-fidelityand fastDNApolymerase.

GeneralDescription
I-5Hi-FiDNAHotStartPolymeraseisanultra-fastandhigh-fidelityDNApolymerase.Itprovidesrobustamplificationofdifficulttemplatesincludingplasmids,BACS,genomicDNA,andlamBDaDNA.Itallowstheamplificationofupto8kbhumangenomicDNAandupto21kblambdaDNA.Ithasanextensionspeedof1kb/10-15secondsdependingontemplatetype.ThisallowsuserstosavetimebyspeedingupPCRreactionsandprovideshigherfidelitythanTaqorPfu.TheenzymecontainsaHotStartmechanismthatinactivatestheenzymeuntilitisheated.ThisallowsuserstosetupPCRreactionsatroomtemperaturewithoutworryingaboutprimerdimersornon-specificpreamplification.

Feature
•Fast–4XfasterthanhotstartTaq
•Robust–highinhibitortolerance
•Highyields–highefficiency
•LongPCRproducts

Source
E.coli

Applications
HotStartPCR
RoutinePCR
FastPCR
HighthroughputPCR
Genotyping

Suppliedwith
5XReactionBuffer(1ml,5XMgClincluded )

50mMMgCl2(1ml)(foroptimization)

Suppliedin(bufferdescription)
20mMTris-HCl,100mMKCl,1mMDTT,0.1mMEDTA,200ug/mlBSA,50%glycerol,1XstABIlizer,pH8.0@25C

StorageCondition
-20ºC

UnitDefinition
Oneunitistheamountofenzymethatincorporates5nmolofdNTPsintoacidinsolublematerialin15minutesat72°C.

Reference
Frey,B.andSuppman,B.(1995).BioChemica.2,34-35.
Chester,N.andMarshak,D.R.(1993).AnalyticalBiochemistry.209,284-290.

ShippingCondition
dryice

Userprotocol

 

 

Molecular cloning and function analysis of PsMYB18 in 'Akihime' plum (Prunus salicina Lindl.) FANG Zhizhen;JIANG Cuicui;ZHOU Danrong;PAN Shaolin;LIN Yanjuan;YE Xinfu;Fruit Research Institute,Fujian Academy of Agricultural Sciences/Fujian Engineering and Technology Research Center for Deciduous Fruit Trees,Fujian Academy of Agricultural Sciences;   【Objective】Temperature and light are important environmental factors that affect the biosynthesis and accumulation of anthocyanin in the fruit peel. Our previous study indicated that 20 ℃ temperature and light treatment(150 mol·m~(-2)·s~(-1)) could induce anthocyanin accumulation in the peel of postharvest'Akihime'plums. Comparative transcriptomic analysis results demonstrated that the expression of a R2 R3-MYB gene(designated as PsMYB18) was significantly upregulated in the fruit peel treated at20 ℃+ light. The objective of the study was to isolate and elucidate the function of PsMYB18 gene during anthocyanin accumulation in the peel of'Akihime'plum.【Methods】The total RNA of the plum fruit peels was extracted using EZNA Plant RNA Kit(Omega Bio-tek, USA) according to manufacturer's instructions. Real-time quantitative PCR(qRT-PCR) was employed to determine the expression of PsMYB18 in the peel of'Akihime'plum fruits treated at 20 ℃ + light, 20 ℃+ dark, 30 ℃+ light and30 ℃+ dark. First-strand cDNA was synthesized from 500 ng of total RNA using the PrimeScript RT reagent kit with gDNA Eraser(Takara, China). The qRT-PCR was performed using the Eppendorf Realplex4 real-time PCR system(Hamburg, Germany) in a total volume of 20 μL in each well containing 10μL of 2×SYBR~? Premix Ex Taq? II(Tli RNaseH Plus, TaKaRa), 1 μL of cDNA(in 1:10 dilution), and0.4 μL 10 μmol primers. The qPCR conditions were 30 s at 95 ℃, followed by 40 cycles of 5 s at 95 ℃,15 s at 60 ℃, and 30 s at 72 ℃, followed by 60 ℃ to 95 ℃ melting curve detection. Actin gene was used as the reference. For gene cloning, total RNA was extracted from the fruit peel treated with 20 ℃and light. The first-strand cDNA was synthesized using First Strand cDNA Synthesis Kit(Thermo Scientific, USA). PsMYB18 gene was isolated from the skin of'Akihime'plums by reverse transcription polymerase chain reaction(RT-PCR). Phylogenetic tree was constructed using the MEGA 5.02 software to investigate the evolution relationship between PsMYB18 and MYB proteins from other plant species.Multiple sequence alignments of PsMYB18 protein with MYB repressors from peach, apple, grape, poplar, Medicago truncatula, Fragaria × ananassa and Antirrhinum majus were performed using DNAMAN7.02. p CAMBIA1302 vector, which was linearized by restriction enzyme NcoI and BstEII was used to construct overexpression vectors. The coding regions of PsMYB18, PsMYB10.1 and PsbHLH3 were isolated using I-5? 2×High-Fidelity Master Mix(MCLAB, San Francisco, CA) and then cloned into the pCAMBIA1302 vector using One Step Seamless Cloning kit(Aidlab, China). All constructs were introduced into Agrobacterium tumefaciens GV3101. Tobacco(Nicotiana tabacum L.) leaf transient expression assay was performed to verify the function of PsMYB18 in anthocyanin biosynthesis. The Agrobacterium strain GV3101 containing overexpression vectors were grown at 28 ℃ in LB medium containing with antibiotics. Then Agrobacterium cells were harvested and resuspended in the infiltration buffer(10 mmol·L~(-1) MgCl2, 10 mmol·L~(-1) MES, pH 5.6, 100 μmol·L~(-1) acetosyringone) to a final OD600 of 0.8. The bacteria were incubated at room temperature for 3 h before infiltration. Digital photographs of anthocyanin development in tobacco leaves were taken at 7 days after infiltration.【Results】The qRTPCR analysis revealed that the expression of PsMYB18 in the fruit peel treated at 20 ℃ and light was significantly enhanced after 3 d of treatment and remained at a high level thereafter. However, no obvious expression upregulation of PsMYB18 was detected in the fruit peel treated at 20 ℃ + dark, 30 ℃ +light and 30 ℃ + dark. These results were consistent with RNA-seq data. The cDNA sequence of PsMYB18 was isolated from the peel of'Akihime'fruits treated at 20 ℃ and light. PsMYB18 contained open reading frame(ORF) of 702 bp in length, which was predicted to encode a protein of 539 amino acid residues. The results of phylogenetic analysis revealed that PsMYB18 and repressors of anthocyanin and proanthocyanidin biosynthesis, including FaMYB1, MtMYB2, PtMYB182, VvMYBC2-L3, VvMYBC2-L1 and PpMYB18, from other plants belonging to the same class. It had the closest relationship with PpMYB18 from peach. Multiple alignment of the deduced amino acid sequences of PsMYB18 and MYB repressors showed that PsMYB18 shared similarity of 96.57% with the PpMYB18 protein and contained the conserved R2 and R3 domains. It also had C1 and C2 repression motifs in the C-terminus. These results implicated that PsMYB18 could be a repressor of anthocyanin biosynthesis.To investigate the role of PsMYB18 in anthocyanin biosynthesis, the ORF of PsMYB18 was amplified and ligated into the pCAMBIA1302 vector. Transient color assays in tobacco leaves showed that coinfiltration of PsMYB18 with PsbHLH3 could not induce anthocyanin accumulation. Furthermore, coinfiltration of PsMYB10.1 with PsbHLH3 resulted in red pigmentation after 7 days, while no pigmentation was observed when PsMYB10.1 and PsbHLH3 were co-infiltrated with PsMYB18.【Conclusion】In this study, PsMYB18 was isolated and its expression was enhanced by the treatment at 20 ℃ and light. Phylogenetic and sequence analysis suggested that Pp MYB18 was likely a repressor of flavonoid biosynthesis. Transient color assay results showed that PsMYB18 was a negative regulator of anthocyanin biosynthesis.
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 25µlReaction50µlReactionFinalConcentration
    
Instructions   
    
 25µlReaction50µlReactionFinalConcentration
I-55XBuffer5ul10ul1X(seenotes)
10µMPrimerA1µl2µl400µM
10µMPrimerB1µl2µl400µM
TemplateDNAasneededasneededseenotes
50mMMgCl2asneededasneededseenotes
I-5Enzyme0.5-1ul1-2ul 
Water(ddH2O)upto25µlupto50µl 
    
    
ThermocyclingConditions   
    
3StepPCR   
StepTemperatureTime 
InitialDenaturation98°C2minutes 
Denaturation98°C10seconds25-35cycles
Annealing55°C-68°C10-15seconds 
Extension72°C10-15seconds/kb 
FinalExtension72°C1-5minutes 
 4°CHold 
    
2StepPCR(seenotes)   
StepTemperatureTime 
InitialDenaturation98°C2minutes 
Denaturation98°C10-15seconds25-35cycles
CombinedAnnealing&Extension72°C15-30seconds/kb 
FinalExtension72°C1-5minutes 
 4°CHold 
    
Notes   
    
RecommendedDNATemplateaddition   
GenomicDNA50-250ng  
PlasmidDNA1pg-10ng  
ViralDNA1pg-10ng  
    
Mg2+   
ThefinalconcentrationofMg2+in1XI-5PCRMasterMixis1.5mM   
AddadditionalMg2+asneededin0.5mMincrements   
SuggestedfinalMg2+concentrationrangesfrom2mMto4mM   
    
2StepPCR   
Use2StepPCRisrecommendedwhentheprimerTmvaluesare>68°C   
    
PCRProduct/Cloning   
The2XI-5PCRMasterMixresultsinPCRproductwithbluntends   
Blunt-endcloningisrecommendedafterPCRwiththisproduct   
ForT/A-cloning,thePCRproductshouldbepurifiedbeforeA-addition