学科分类
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9 个结果
  • 简介:TheNetAcetmethodhasbeendevelopedtomakepredictionsofN-terminalacetylationsites,butmoreinformationofthedatasetcouldbeutilizedtoimprovetheperformanceofthemodel.Byemployinganewwaytoextractpatternsfromsequencesandusingasamplebalancingmechanism,weobtainedacorrelationcoefficientof0.85,andasensitivityof93%onanindependentmammaliandataset.Awebserverutilizingthismethodhasbeenconstructedandisavailableathttp://166.111.24.5/acetylation.html.

  • 标签: N-端 乙酰化作用 支持向量分析 蛋白质 变异 预测方法
  • 简介:Kr眉p像像素的因素8(KLF8)抄写因素在房间周期前进起一个关键作用,oncogenic转变,对间充质的转变和侵略上皮。然而,它的原子本地化信号(NLS)没被识别。有另外的KLFmonopartiteNLS(mNLS)和C2H2锌手指(ZF)的KLF8份额,哪个被显示了是为一些另外的KLF的NLS。在这份报告,用指导PCR的mutagenesis和immunofluorescent显微镜学,我们显示出mNLSs,任何单个ZF的删除,或变化的那混乱Zn2+有约束力或联系DNA主题没影响KLF8的原子本地化。删除>然而,从C终点的1.5ZF引起了KLF8的细胞质的累积。令人惊讶地,氨基酸(aa)的删除151-200区域几乎从原子核消除了KLF8。有PKC禁止者的S165A,K171E或K171R变化,或处理导致了部分细胞质的累积。Co-immunoprecipitation证明KLF8与importin-交往了,这个相互作用要求了ZF主题。aa1-150或201-261区域的删除独自没改变原子本地化。BrdU加入和cyclinD1倡导者酶试金作为野类型的KLF8证明在原子本地化的KLF8异种有缺陷者不能支持DNA合成或cyclinD1倡导者激活。一起拿,这些结果建议KLF8有二NLS,一包围S165和K171并且另外的是二双人脚踏车ZF,它为KLF8原子本地化和它的细胞的功能的规定是批评的。

  • 标签: 调控区 核合作 序列 控制 定位 锌指
  • 简介:Humanrhodopsinkinase(RK)andacarboxylterminus-truncatedmutantRKlackingthelast59aminoacids(RKC)wereexpressedinhumanembryonickidney293cellstoinvestigatetheroleofthecarboxylterminusofRKinrecognitionandphosphorylationofrhodopsin.RKC,likethewild-typeRK,wasdetectedinbothplasmamembranesandcytosolicfractions.TheCterminaltruncatedrhodopsinkinasewasunabletophosphorylatephoto-activatedrhodopsin,butpossesseskinaseactivitysimilartothewild-typeRKinphosphorylationofsmallpeptidesubstrate.ItsuggeststhatthetruncationdidnotdisturbthegrossstructuresofRKcatalyticdomain.OurresultsalsoshowthatRKCfailedtotranslocatetophoto-activatedrodoutsegments.Takentogether,ourstudydemonstratethecarboxylterminusofRKisrequiredforphosphorylationofphoto-activatedrhodopsinandstronglyindicatethatcarboxyl-terminusofRKmaybeinvolvedininteractionwithphoto-activatedrhodopsin.

  • 标签: 光活化视紫红质 磷酸化 视网膜色素 激酶 羧化终止 夜盲症
  • 简介:InordertodevelopclinicaldiagnostictoolsforrapiddetectionofSARS-CoV(severeacuterespiratorysyndrome-associatedcoronavirus)andtoidentifycandidateproteinsforvaccinedevelopment,theC-terminalportionofthenucleocapsid(NC)genewasamplifiedusingRT-PCRfromtheSARS-CoVgenome,clonedintoayeastexpressionvector(pEGH),andexpressedasaglutathioneS-transferase(GST)andHisx6double-taggedfusionproteinunderthecontrolofaninduciblepromoter.WesternanalysisonthepurifiedproteinconfirmedtheexpressionandpurificationoftheNCfusionproteinsfromyeast.Todetermineitsantigenicity,thefusionproteinwaschallengedwithserumsamplesfromSARSpatientsandnormalcontrols.TheNCfusionproteindemonstratedhighantigenicitywithhighspecificity,andtherefore,itshouldhavegreatpotentialindesigningclinicaldiagnostictoolsandprovideusefulinformationforvaccinedevelopment.

  • 标签: 抗原性 SARS 冠状病毒 核壳体蛋白
  • 简介:P28,a28kDproteinfromtoad(Bufobufogargarizans)oocytes,wasidentifiedbyusingP13^suc1-agaroseaffinitychromatography.Sequencehomologyanalysisofthefull-lengthcDNAofP28(GeneBankaccessionnumber:AF314091)indicatedthatitencodesaproteincontaining224amino-acidswithabout55%iden-titiesandmorethan70%positivestoencodesaproteincontaining224amino-acidswithabout55%iden-titiesandmorethan70%positivestohuman,ratormouseUCH-L1,andcontainshomologicalfunctionaldomainsofUCHfamily.Anti-p28monoclonalantibody,oninjectingintotheoocytes,couldinhibittheprogesterone-inducedresumptionofmeioticdivisioninadose-dependentmanner.TherecombinantproteinP28showedsimilarSDS/PAGEbehaviorstothenativeone,andpromotedubiquitinethylesterhydrolysis,aclassicalcatalyticreactionforubiquitincarboxylterminalhydrolases(UCHs).Theresultsinthispaperrevealthatanovelprotein,p28,existsinthetoadoocytes,isaUCHLlhomolog,wasengagedintheprocessofprogesterone-inducedoocytematurationpossiblythroughaninvolvementinproteinturnoveranddegradation.

  • 标签: 蟾蜍 卵母细胞成熟 p28 cDNA克隆 重组表达 蛙卵
  • 简介:预言潜水艇的能力从它的顺序的蛋白质的细胞的本地化是很重要的,它关于蛋白质的功能提供信息。我们在场一个计算工具,PredSL,它利用神经网络,Markov链,隐藏的Markov建模的侧面,和得分为潜水艇的预言的矩阵在从N终端氨基酸顺序的真核细胞的房间的蛋白质的细胞的本地化。它试图分类蛋白质进五个组:叶绿体,thylakoid,线粒体,能分泌的小径,和“其它”。当在一个五倍的交叉验证过程测试了时,PredSL分别地为植物和非植物数据集表明86.7%和87.1%全面精确性。与TargetP,迄今为止是最广泛地使用的方法,和LumenP相比,PredSL的结果在大多数情况中是可比较的。当在Saccharomycescerevisiae染色体的试验性地验证的蛋白质上测试了时,PredSL可比较地表现如果比为一样的任务的任何可得到的算法不好。而且,PredSL是为这些的预言有能力的唯一的方法代替作为通过URL:http://bioinformatics.biol.uoa.gr/PredSL/的独立应用可得到的细胞的本地化。

  • 标签: 基因序列 蛋白质 亚细胞 缩氨酸
  • 简介:Thenorepinephrinetransporter(NET)isamemberoftheNa^+/Cl^-dependentneurotransmittertransporterfamilyandconstitutesthetargetofseveralclinicallyimportantantidepressants.TodelineatethecriticalaminoacidresiduesandthefunctionofC-terminalinregulatingtransportactivityofNET,hereweconstructedtwositemutants(V70F,F72V;V70I,F72V)andoneC-terminaltruncatedmutant(Δ611-617).ThewildtypeandmutantsofNETwereexpressedinXenopusoocytesbyinjectionoftheircRNA.Wefoundthatallofthesemutantslosttheirtransportactivity.TheseresultsindicatethattheaminoacidresiduesofV70andF72,andthelastsevenaminoacidsofC-terminalareessentialtothetransportactivityofNET.

  • 标签: 去甲肾上腺素 神经递质 功能 C端 氨基酸残基 Val