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    • 3. 发明申请
    • MUTANTS OF O6-ALKYLGUANINE-DNA ALKYLTRANSFERASE
    • O6-ALKYLGUANINE-DNA烷基转移酶的突变体
    • WO2005085431A9
    • 2006-10-12
    • PCT/EP2005050899
    • 2005-03-01
    • EPFL ECOLE POLYTECHNIQUE FEDERALE LAUSANNEBARNIKOV JANCHIDLEY CHRISTOPHERGRONEMEYER THOMASHEINIS CHRISTIANJACCARD HUGHESJOHNSSON KAIJUILLERAT ALEXANDREKEPPLER ANTJE
    • BARNIKOV JANCHIDLEY CHRISTOPHERGRONEMEYER THOMASHEINIS CHRISTIANJACCARD HUGHESJOHNSSON KAIJUILLERAT ALEXANDREKEPPLER ANTJE
    • C12N9/10
    • C12N9/10C07K2319/00C12N9/1007
    • The invention relates to AGT mutants showing, when compared to the wild type human AGT, two or more advantageous properties selected from (a) reduced DNA interaction; (b) localisation of the expressed protein in eukaryotic cells that is no longer restricted to the nucleus; (c) improved expression yield as soluble protein and improved stability in various hosts; (d) improved stability under oxidising conditions; (e) improved stability within cells after reaction with a substrate; (f) improved stability outside cells before and after reaction with a substrate; (g) improved in vitro solubility; (h) improved reactivity against 0 6 -alkylguanine substrates; (1) reduced reactivity against DNA-based substrates; and (j) reduced reactivity against N 9 -substituted 0 6 -alkylguanine substrates. Such AGT mutants with the mentioned improved properties are mutants wherein between 1 and 25 amino acids of the wild type human AGT are substituted by other amino acids, and optionally I to 5 amino acids out of the continuous chain at one, two or three positions are deleted or added and/or 1 to 4 amino acids at the N-terminus or 1 to 40 amino acids at the C-terminus are deleted. The invention further relates to a method for detecting and/or manipulating a protein of interest wherein the protein of interest is incorporated into a fusion protein with the AGT mutants of the invention. Another object of the invention are AGT fusion proteins comprising such AGT mutants and the protein of interest.
    • 本发明涉及AGT突变体,当与野生型人AGT相比时,显示出选自(a)减少的DNA相互作用的两种或更多种有利性质; (b)表达的蛋白质在不再限于细胞核的真核细胞中的定位; (c)提高作为可溶性蛋白质的表达产率和改善各种宿主的稳定性; (d)改善氧化条件下的稳定性; (e)在与底物反应后改善细胞内的稳定性; (f)在与底物反应之前和之后提高细胞外的稳定性; (g)提高体外溶解度; (h)改善对0-6个 - 烷基鸟嘌呤底物的反应性; (1)降低对DNA基底层的反应性; 和(j)对N 9 - 取代的0-6-烷基鸟嘌呤底物的反应性降低。 具有上述改进性质的这种AGT突变体是突变体,其中野生型人AGT的1至25个氨基酸被其它氨基酸取代,并且在一个,两个或三个位置上,连续链中任选地I至5个氨基酸是 在N-末端缺失或添加和/或1至4个氨基酸或C末端的1至40个氨基酸被缺失。 本发明还涉及用于检测和/或操纵感兴趣的蛋白质的方法,其中将目的蛋白质与本发明的AGT突变体掺入融合蛋白中。 本发明的另一个目的是包含这种AGT突变体和目的蛋白质的AGT融合蛋白。
    • 9. 发明申请
    • MODULATION OF STRUCTURED POLYPEPTIDE SPECIFICITY
    • 结构多肽特异性的调节
    • WO2013050615A1
    • 2013-04-11
    • PCT/EP2012/069897
    • 2012-10-08
    • BICYCLE THERAPEUTICS LIMITEDTITE, JohnWALKER, EdwardSTACE, CatherineHEINIS, Christian
    • TITE, JohnWALKER, EdwardSTACE, CatherineHEINIS, Christian
    • C40B40/02C07K1/107
    • C07K7/56A61K38/10A61K38/12C07K1/00C07K1/1075C07K2/00C07K7/08
    • The invention describes a method for selecting a polypeptide ligand having a desired level of specificity for a target, wherein the polypeptide ligand comprises a polypeptide comprising at least three reactive groups, separated by at least two loop sequences, and a molecular scaffold which formscovalent bonds with the reactive groups of the polypeptide such that at least two polypeptide loops are formed on the molecular scaffold, comprising (i) screening at least two different sets of polypeptide ligands against the target, and selecting one or more ligands from each library which interact with the target; (ii) comparing the activity of the selected ligands with one or more paralogues or orthologues of the target; and (iii) further selecting one or more ligands according to their activity towardssaid one or more paralogues or orthologues; wherein said two or more different sets of ligands differ in the length of the polypeptide loops formed on the molecular scaffold.
    • 本发明描述了一种用于选择对靶标具有期望的特异性水平的多肽配体的方法,其中多肽配体包含多肽,该多肽配体包含至少三个由至少两个环序列分开的反应性基团的多肽,以及分子支架,其与 所述多肽的反应性基团使得在分子支架上形成至少两个多肽环,其包含(i)筛选针对靶的至少两种不同组的多肽配体,以及从每个文库中选择一个或多个与 目标; (ii)将所选配体的活性与目标的一个或多个旁系同源物或直向同源物进行比较; 和(iii)根据它们的活性进一步选择一种或多种配体,所述配体依赖于一个或多个旁系同源物或直向同源物; 其中所述两种或更多种不同的配体组在分子支架上形成的多肽环的长度不同。