RecombinantBiotinylatedHumanHBV(HLA-A*02:01)Protein,His-AviTag性能參數(shù)表達(dá)區(qū)間及表達(dá)系統(tǒng)(Source)RecombinantBiotinylatedHumanHBV(HLA-A*02:01)ProteinisexpressedfromHEK293withHistagandAvitagattheC-terminalItcontainsGly25-Thr305(HLA-A*02:01),Ile21-Met119(B2M)andFLLTRILTIpeptide.[Accession|A0A140T913(HLA-A*02:01)&P61769(B2M)&FLLTRILTIpeptide]分子量大?。∕olecularWeight)TheproteinhasapredictedMWof50.5kDa.Duetoglycosylation,theproteinmigratesto52-62kDabasedonTris-BisPAGEresult.(Endotoxin)Lessthan1EUperμgbytheLALmethod.純度(Purity)>95%asdeterminedby>95%asdeterminedbyHPLC制劑(Formulation)Lyophilizedfrom0.22μmfilteredsolutioninPBS(pH7.4).Normally8%trehaloseisaddedasprotectantbeforelyophilization.重構(gòu)方法(Reconstitution)Centrifugetubesbeforeopening.Reconstitutingtoaconcentrationmorethan100μg/mlisrecommended.Dissolvethelyophilizedproteinindistilledwater.α-凝血酶在肝臟中作為非活性前體-凝血酶原合成,在凝血級(jí)聯(lián)反應(yīng)中被啟用,這種活性酶由285個(gè)氨基酸組成。Rat Fractalkine/CX3CL1
Name:AITRL,MouseSynonyms:Activation-inducedTNFRmemberLigand,TNFSF18,GITRL,TL-6Description:Activation-InducibleTNF-RelatedLigand(AITRL),alsoknownasGlucocorticoid-InducedTNF-RelatedLigand(GITRL),belongstothetumornecrosisfactorsuperfamily(TNFSF).AITRLisaTypeIIsingletransmembraneproteinandshareslowconservationwithintheextracellulardomainwithotherTNFSFmembers.AITRLisexpressedonmacrophages,immatureandmaturedendriticcellsandBcells.Itsreceptor,Activation-InducibleTNFRfamilyReceptor(AITR),isexpressedonTlymphocytes,naturalkiller(NK)cells,andantigen-presentingcells.AfterbindingbyAITRL,AITRcanbereleased.AITRactivationincreasesresistancetotumorsandviralinfectionsandisinvolvedinautoimmuneandinflammatoryprocesses.Inaddition,activatedAITRincreasesTCR-inducedTcellproliferationandcytokineproductionandrescuesTcellsandNKcellsfromapoptosis.RecombinantmouseActivation-InducibleTNF-RelatedLigand(rmAITRL)producedinE.Recombinant Human Proinsulin C-Peptide Analogue猴痘病毒A30蛋白是病毒進(jìn)入宿主與細(xì)胞-細(xì)胞融合過(guò)程中所需的包膜蛋白,被認(rèn)為是猴痘病毒研究中的重要靶點(diǎn)。
基因工程與抗體技術(shù)通過(guò)基因工程方法,可以構(gòu)建重組3C蛋白酶,并利用其切割特異性進(jìn)行活性驗(yàn)證。此外,通過(guò)動(dòng)物實(shí)驗(yàn)獲得3C蛋白酶抗體,可以探索利用抗體技術(shù)抑制3C蛋白酶活性,進(jìn)而達(dá)到抑制病毒復(fù)制的目的4。研究進(jìn)展與挑戰(zhàn)3C蛋白酶及其抑制劑的研究進(jìn)展迅速,但仍面臨挑戰(zhàn)。例如,需要深入了解不同耐藥突變對(duì)3CLpro自身活性的影響,以及不同抑制劑之間的交叉耐藥風(fēng)險(xiǎn)。這些研究對(duì)于開(kāi)發(fā)新的廣譜抗病毒藥物具有重要意義38。結(jié)論3C蛋白酶是一類在RNA病毒復(fù)制中發(fā)揮關(guān)鍵作用的酶,是抗病毒藥物開(kāi)發(fā)的重要靶點(diǎn)。深入研究3C蛋白酶的結(jié)構(gòu)、功能以及耐藥機(jī)制,對(duì)于開(kāi)發(fā)有效的抗病毒藥物和方法具有重要意義。隨著科學(xué)技術(shù)的不斷進(jìn)步,3C蛋白酶的研究將為人類戰(zhàn)勝病毒性疾病提供更多的科學(xué)依據(jù)策略。
大腸桿菌系統(tǒng)通常是小分子細(xì)胞質(zhì)蛋白或結(jié)構(gòu)域表達(dá)的宿主。用大腸桿菌生產(chǎn)蛋白質(zhì),由于只需要簡(jiǎn)單的培養(yǎng)基和條件,因此費(fèi)用低且方便。此外,除了無(wú)細(xì)胞表達(dá),它是速度的系統(tǒng),大腸桿菌倍增時(shí)間(約20min)比酵母(2h)、昆蟲(chóng)細(xì)胞和哺乳動(dòng)物細(xì)胞都快。一般來(lái)說(shuō),在大腸桿菌中表達(dá)重組蛋白包括:1.將一個(gè)編碼目標(biāo)蛋白的質(zhì)粒導(dǎo)入宿主菌;2.培養(yǎng)細(xì)胞至對(duì)數(shù)生長(zhǎng)期;3.誘導(dǎo)蛋白表達(dá)。選擇合適的表達(dá)載體合適的宿主選定后,相應(yīng)的有許多工程化克隆位點(diǎn)和用于驅(qū)動(dòng)蛋白表達(dá)的非編碼序列的載體可用。啟動(dòng)子通常是可誘導(dǎo)的,以在細(xì)胞生長(zhǎng)到合適的密度前阻止目標(biāo)蛋白表達(dá)。大部分載體還提供目標(biāo)蛋白與一系列蛋白標(biāo)簽構(gòu)建融合蛋白的選擇。常用的大腸桿菌表達(dá)載體分為以下兩大類:E.coliRNA聚合酶轉(zhuǎn)錄的載體透明質(zhì)酸的生產(chǎn)可以通過(guò)動(dòng)物組織提取、微生物發(fā)酵或化學(xué)合成等方法進(jìn)行。
RecombinantBiotinylatedHumanMSLN/MesothelinProtein,hFc-AviTag分子別名(Synonyms)Mesothelin;CAK1;MSLN;MPFSMRP表達(dá)區(qū)間及表達(dá)系統(tǒng)(Source)BiotinylatedHumanMSLN/MesothelinProteinisexpressedfromHEK293withhFctagandAvitagattheC-Terminus.ItcontainsGlu296-Gly580.[Accession|Q13421-2]分子量大?。∕olecularWeight)TheproteinhasapredictedMWof61.1kDa.Duetoglycosylation,theproteinmigratesto70-80kDabasedonSDS-PAGEresult.(Endotoxin)Lessthan1EUperμgbytheLALmethod.純度(Purity)>95%asdeterminedbySDS-PAGEandHPLC.活性(Activity)ELISAData:ImmobilizedAnti-MSLNAntibody,hFcTagat1μg/ml(100μl/well)ontheplate.DoseresponsecurveforBiotinylatedHumanMSLN,hFcTagwiththeEC50of18.4ng/mldeterminedbyELISA.α-凝血酶的多面性質(zhì)在其臨床使用中提出了挑戰(zhàn),特別是在平衡其止血效果與血栓形成風(fēng)險(xiǎn)之間。Recombinant PE-Labeled Human CD7 Protein,His-Avi Tag
泛素蛋白是一個(gè)76個(gè)氨基酸,高度保守的核和細(xì)胞質(zhì)蛋白。Rat Fractalkine/CX3CL1
SARS-CoV-2,whichcausestheglobalpandemiccoronavirusdisease2019(Covid-19),belongstoafamilyofvirusesknownascoronavirusesthatalsoincludeMERS?CoVandSARS-CoV-1.Coronavirusesarecommonlycomprisedoffourstructuralproteins:Spikeprotein(S),Envelopeprotein(E),Membraneprotein(M)andNucleocapsidprotein(N).TheSARS-CoV-2Sproteinisaglycoproteinthatmediatesmembranefusionandviralentry.TheSproteinishomotrimeric,witheach~180-kDamonomerconsistingoftwosubunits,S1andS2.TheRBDofSARS-CoV-2bindsametallopeptidase,angiotensin-convertingenzyme2(ACE-2).BeforebindingtotheACE-2receptor,structuralanalysisoftheS1trimershowsthatonlyoneofthethreeRBDdomainsisinthe"up"conformation.Thisisanunstableandtransientstatethatpassesbetweentrimericsubunitsbutisneverthelessanexposedstatetobetargetedforneutralizingantibodytherapy.PolyclonalantibodiestotheRBDoftheSARS-CoV-2proteinhavebeenshowntoinhibitinteractionwiththeACE-2receptor,confirmingRBDasanattractivetargetforvaccinationsorantiviraltherapy.Rat Fractalkine/CX3CL1