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    • 7. 发明申请
    • Fragments of fluorescent proteins for protein fragment complementation assays
    • 用于蛋白质片段互补测定的荧光蛋白片段
    • US20070254373A1
    • 2007-11-01
    • US11656543
    • 2007-01-23
    • Stephen MichnickMarnie MacDonaldJane Lamerdin
    • Stephen MichnickMarnie MacDonaldJane Lamerdin
    • G01N33/00C07K14/00
    • C07K14/43595G01N33/542G01N33/58G01N33/582G01N33/68G01N33/6845G01N2333/43595
    • The present invention is directed to Protein-fragment Complementation Assays (PCAs) and assay compositions based on fluorescent proteins. The invention provides methods for fragmenting fluorescent proteins and generating mutant fragments with desired spectral characteristics for PCA. The invention encompasses assays and compositions based on fluorescent proteins from the species Aequorea, Anemonia and Anthozoa. In particular, the invention is directed to fragments of mutant fluorescent proteins having improved spectral properties over the wild-type proteins. The invention encompasses fragments of mutant versions of A. Victoria green fluorescent protein (GFP), in particular yellow fluorescent proteins (EYFP and super-EYFP), ‘Venus’, cyan, ‘citrine’, blue, cyan-green, and photoactivatable variants of GFP The invention also encompasses red fluorescent PCAs based on Discosoma red fluorescent protein (RFP PCA)and a kindling fluorescent protein PCA (KFP1 PCA) derived from Anemonia sulcata. Any useful mutation of a fluorescent protein can be engineered into a fragment, generating a wide range of assays useful for drug discovery, target validation, high-throughput screening, high-content screening, pathway mapping, drug mechanism-of-action studies, biosensors, and diagnostics.
    • 本发明涉及基于荧光蛋白的蛋白质片段互补测定(PCA)和测定组合物。 本发明提供了用于分解荧光蛋白并产生具有PCA所需光谱特征的突变片段的方法。 本发明包括基于来自Aequorea,Anemonia和Anthozoa的荧光蛋白的测定和组合物。 特别地,本发明涉及具有比野生型蛋白质更好的光谱性质的突变荧光蛋白的片段。 本发明包括A.维多利亚绿色荧光蛋白(GFP),特别是黄色荧光蛋白(EYFP和超EYFP),“维纳斯”,青色“黄水晶”,蓝色,青绿色和可光活化变体的突变体版本的片段 的GFP本发明还包括基于Discosoma红色荧光蛋白(RFP PCA)的红色荧光PCA和源自Anemonia sulcata的点燃荧光蛋白PCA(KFP1 PCA)。 荧光蛋白的任何有用的突变可被工程化成片段,产生广泛的用于药物发现,靶标验证,高通量筛选,高含量筛选,途径作图,药物作用机理研究,生物传感器 ,和诊断。
    • 10. 发明申请
    • Assay
    • US20030104490A1
    • 2003-06-05
    • US10311409
    • 2002-12-16
    • Laura Margaret FletcherJeremy Myles Tavare
    • G01N033/53G01N033/567C07H021/04C07K014/65
    • G01N33/502C07K14/54C07K2319/00G01N33/5008G01N2333/43595G01N2333/62
    • There is disclosed a method of determining whether a candidate compound mimics or antagonizes effects of insulin, comprising: (a) providing a transfected host cell comprising a nucleic acid sequence which encodes a protein construct comprising an IRAP protein moiety and a detectable protein moiety, wherein the detectable protein moiety is fused to a luminal domain of the IRAP protein moiety and further wherein the detectable protein moiety is capable of being assayed by a first detection method capable of detecting the protein moiety when located exofacially but not when located intracellularly and a second detection method capable of detecting the protein moiety both when located exofacially and when located intracellularly; (b) contacting the transfected host cell with a candidate compound; (c) measuring the amount of the exofacial protein moiety by the said first detection method and measuring the total amount of exofacial and intracellular detectable protein moiety by the said second detection method; and (d) comparing the amount of exofacial detectable protein moiety with the total amount of exofacial and intracellular detectable protein moiety to provide a measure of the extent of GLUT4 vesicle translocation. In an alternative method, the protein construct comprises an IRAP protein moiety, a first detectable protein moiety which is fused to a luminal domain of the IRAP protein moiety and a second detectable protein moiety which is fused to a cytoplasmic domain of the IRAP protein moiety, wherein the first detectable protein moiety is capable of being assayed by a first detection method capable of detecting the first protein moiety when located exofacially but not when located intracellularly and wherein the second detectable protein moiety is capable of being assayed by a second detection method capable of detecting the second protein moiety when located intracellularly. The assays of the invention may be used to determine whether a nullcandidate compoundnull is a mimic or antagonist of insulin. The present invention may be used to test libraries of compounds in an automated high throughput screen.