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    • 1. 发明申请
    • PRODUCTION OF IN VIVO N-DEGLYCOSYLATED RECOMBINANT PROTEINS BY CO-EXPRESSION WITH ENDO H
    • 与ENDO H共同生产体内N-脱酰基重组蛋白质
    • WO2017081520A1
    • 2017-05-18
    • PCT/IB2015/058781
    • 2015-11-13
    • MAMMEDOV, Tarlan
    • MAMMEDOV, Tarlan
    • C12N9/14C07K14/36C12N15/82
    • C12N15/8242C12N9/2402
    • Plants have emerged as an alternative expression system and are increasingly being used byindustry and academia for producing target proteins. However, the ability of plants to glycosylate proteins can be a significant limitation for those proteins, which do not require N- glycosylation. For example, Plasmodium falciparum proteins, or A chain of human factor XIIIdo not carry N-linked glycans, or the protective antigen (PA) of Bacillus anthracisis not a glycoprotein; however, these proteins contain potential N-linked glycosylation sites that can be aberrantly glycosylated during expression in yeast, mammalian, or plant systems, potentially leading toreduced functionality and immunogenicity because of incorrect⁄altered folding and⁄or masking of epitopes. To overcome this problem we have recently developed a strategy of enzymatic deglycosylation of proteins in vivo by co-expressing with bacterial PNGase F (Peptide: N-glycosidase F) using transient expression in plants (WIPO Patent Application WO/2012/170678), which allowed production of malaria vaccine candidate Pfs48/45, which can provide ahigh transmission blocking (TB) activity (Mamedov et al., 2012). In addition, other deglycosylated antigens induced significantly higher levels of toxin-neutralizing antibody responses in mice than compared with glycosylated forms (Mamedov et al, manuscript has been submitted). Although a PNGase F treatment (in vivodeglycosylation) removes the oligosaccharide intact, but causes amino acid change in the deglycosylated protein due to deamidation of the asparagine (N) in the NxS/T site (sequence) into an aspartate (D). In this study, a strategy was developed for production of target proteins in plants in non-N-glycosylated form, but with no amino acid change in the NxS/T site of the resulting deglycosylated proteins, which can provide production of non-N- glycosylated recombinant proteins in plants or other eukaryotic system with a native-like fold. Thus, materials and methods for in vivo de- glycosylation of recombinant N-glycosylated proteins by co-expression with Endo-β-N- acetylglucosaminidase H (Endo H) in plants, using a transient expression system are described in this invention. A method of expressing active Endo Hin plants is also provided.
    • 植物已经成为替代表达系统,越来越多地被工业界和学术界用于生产靶蛋白。 然而,植物对蛋白质进行糖基化的能力可能是那些不需要N-糖基化的蛋白质的显着限制。 例如,恶性疟原虫蛋白或人因子XIII的A链不携带N-连接的聚糖,或者炭疽芽孢杆菌的保护性抗原(PA)不是糖蛋白; 然而,这些蛋白质含有潜在的N-连接糖基化位点,其在酵母,哺乳动物或植物系统中的表达过程中可能异常糖基化,由于不正确的/改变的折叠和/或掩蔽表位,潜在地导致功能性降低和免疫原性降低。 为了克服这个问题,我们最近通过使用植物中的瞬时表达(WIPO专利申请WO / 2012/170678)与细菌PNGase F(肽:N-糖苷酶F)共表达开发了体内蛋白质酶促去糖基化的策略(WIPO专利申请WO / 2012/170678) 允许生产可提供高传输阻断(TB)活性的疟疾疫苗候选物Pfs48 / 45(Mamedov等,2012)。 此外,与糖基化形式相比,其他去糖基化抗原在小鼠中诱导显着更高水平的毒素中和抗体应答(Mamedov等,手稿已提交)。 尽管PNGase F处理(体内糖基化)除去了完整的寡糖,但由于NxS / T位点(序列)中的天冬酰胺(N)脱酰胺成天冬氨酸(D),导致去糖基化蛋白中的氨基酸改变。 在这项研究中,制定了一种策略,用于以非N-糖基化形式在植物中产生目标蛋白质,但是所得到的去糖基化蛋白质的NxS / T位点没有氨基酸改变,这可以提供非N-糖基化 在具有天然样折叠的植物或其他真核系统中糖基化重组蛋白。 因此,本发明描述了使用瞬时表达系统通过在植物中与内切-β-N-乙酰氨基葡糖苷酶H(Endo H)共表达的用于体内重组N-糖基化蛋白质的糖基化的材料和方法。 还提供了表达活性Endo Hin植物的方法。
    • 9. 发明申请
    • TWO NOVEL ALKYLRESORCINOL SYNTHASE GENES FROM SORGHUM; CLONING, EXPRESSION, TRANSFORMATION AND CHARACTERIZATION
    • 来自SORGHUM的两种新型碱性磷酸酶合成酶基因; 克隆,表达,转化和表征
    • WO2011112380A3
    • 2012-03-29
    • PCT/US2011026466
    • 2011-02-28
    • US AGRICULTUREBAERSON SCOTT RPAN ZHIQIANGRIMANDO AGNES MDAYAN FRANCK ECOOK DANIEL
    • BAERSON SCOTT RPAN ZHIQIANGRIMANDO AGNES MDAYAN FRANCK ECOOK DANIEL
    • C12N15/52A01H5/00C12N9/00C12N15/63
    • A61K31/713C12N9/00C12N15/8242C12N15/825C12N15/8257C12N15/8279
    • Sorghum is considered to be an allelopathic crop species, producing phytotoxins such as the lipid benzoquinone sorgoleone (2-hydroxy-5-methoxy-3-[(Z,Z)-8',l l ', 14'- pentadecatrieneJ-^-benzoquinone) which likely accounts for much of its allelopathic properties. Prior investigations into the biosynthesis of sorgoleone have suggested the participation of one or more alkylresorcinol synthases (ARS), which are type III polyketide synthases (PKS) that produce 5-alkylresorcinols using medium to long-chain fatty acyl-CoA starter units via iterative condensations with malonyl-CoA. Current evidence suggests that sorgoleone biosynthesis occurs exclusively in root hair cells, involving the synthesis of a 5- pentadecatrienyl resorcinol intermediate derived from an unusual 16:3 fatty acyl-CoA starter unit. To characterize the enzymes responsible for the biosynthesis of this alkylresorcinol intermediate, a previously-described expressed sequence tag (EST) database prepared from isolated root hairs was first mined for all PKS-I ike sequences. Quantitative real-time RT- PCR analyses revealed that two of these sequences were preferentially expressed in root hairs, and recombinant enzyme studies demonstrated that both sequences (designated ARSl and ARS2) encode ARS enzymes capable of accepting a variety of fatty acyi-CoA starter units. Furthermore, RNA interference (RNAi) experiments directed against ARSl and ARS2 resulted in the generation of multiple independent transformant events exhibiting dramatically reduced sorgoleone levels. Thus, both ARSl and ARS2 are likely to participate in the biosynthesis of sorgoleone inpJanta. The sequences o?ARSl and ARS2 were also used to identify several rice genes encoding ARSs, which are likely involved in the production of defense-related alkyiresorcinols.
    • 高粱被认为是一种化感作物,产生植物毒素,如脂质苯醌山梨酮(2-羟基-5-甲氧基-3 - [(Z,Z)-8',11',14'-十五碳三烯基苯醌 ),这可能占其大部分的抗病性。 对sorgoleone的生物合成的先前研究表明,一种或多种烷基间苯二酚合酶(ARS)的参与,其是使用中等至长链脂肪酰辅酶A起始单元通过迭代缩合产生5-烷基间苯二酚的III型聚酮化合物合酶(PKS) 与丙二酰辅酶A。 目前的证据表明,sorgoleone生物合成完全发生在根毛细胞中,涉及合成来自不寻常的16:3脂肪酰辅酶A引发剂单元的5-十五碳烯基间苯二酚中间体。 为了表征负责该烷基间苯二酚中间体的生物合成的酶,首先从所有PKS-I序列开始从分离的根毛制备的先前描述的表达序列标签(EST)数据库。 定量实时RT-PCR分析显示,这些序列中的两个优先在根毛中表达,重组酶研究表明两个序列(指定为ARS1和ARS2)编码能够接受多种脂肪酰辅酶A起始单位的ARS酶 。 此外,针对ARS1和ARS2的RNA干扰(RNAi)实验导致产生显着降低的sorgoleone水平的多个独立转化体事件。 因此,ARS1和ARS2两者都可能参与了山茱萸碱的生物合成。 序列o ARS1和ARS2也用于鉴定编码ARS的几个水稻基因,这些基因可能参与防御相关的烷基苯酚的生产。
    • 10. 发明申请
    • TWO NOVEL ALKYLRESORCINOL SYNTHASE GENES FROM SORGHUM; CLONING, EXPRESSION, TRANSFORMATION AND CHARACTERIZATION
    • 来自SORGHUM的两种新型碱性磷酸酶合成酶基因; 克隆,表达,转化和表征
    • WO2011112380A2
    • 2011-09-15
    • PCT/US2011/026466
    • 2011-02-28
    • THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF AGRICULTUREBAERSON, Scott, R.PAN, ZhiqiangRIMANDO, Agnes, M.DAYAN, Franck, E.COOK, Daniel
    • BAERSON, Scott, R.PAN, ZhiqiangRIMANDO, Agnes, M.DAYAN, Franck, E.COOK, Daniel
    • C12N15/52C12N9/00C12N15/63A01H5/00
    • A61K31/713C12N9/00C12N15/8242C12N15/825C12N15/8257C12N15/8279
    • Sorghum is considered to be an allelopathic crop species, producing phytotoxins such as the lipid benzoquinone sorgoleone (2-hydroxy-5-methoxy-3-[(Z,Z)-8',l l ', 14'- pentadecatrieneJ-^-benzoquinone) which likely accounts for much of its allelopathic properties. Prior investigations into the biosynthesis of sorgoleone have suggested the participation of one or more alkylresorcinol synthases (ARS), which are type III polyketide synthases (PKS) that produce 5-alkylresorcinols using medium to long-chain fatty acyl-CoA starter units via iterative condensations with malonyl-CoA. Current evidence suggests that sorgoleone biosynthesis occurs exclusively in root hair cells, involving the synthesis of a 5- pentadecatrienyl resorcinol intermediate derived from an unusual 16:3 fatty acyl-CoA starter unit. To characterize the enzymes responsible for the biosynthesis of this alkylresorcinol intermediate, a previously-described expressed sequence tag (EST) database prepared from isolated root hairs was first mined for all PKS-I ike sequences. Quantitative real-time RT- PCR analyses revealed that two of these sequences were preferentially expressed in root hairs, and recombinant enzyme studies demonstrated that both sequences (designated ARSl and ARS2) encode ARS enzymes capable of accepting a variety of fatty acyi-CoA starter units. Furthermore, RNA interference (RNAi) experiments directed against ARSl and ARS2 resulted in the generation of multiple independent transformant events exhibiting dramatically reduced sorgoleone levels. Thus, both ARSl and ARS2 are likely to participate in the biosynthesis of sorgoleone inpJαntα. The sequences oϊARSl and ARS2 were also used to identify several rice genes encoding ARSs, which are likely involved in the production of defense-related alkyiresorcinols.
    • 高粱被认为是一种化感作物,产生植物毒素,如脂质苯醌山梨酮(2-羟基-5-甲氧基-3 - [(Z,Z)-8',11',14'-十五碳三烯基苯醌 ),这可能占其大部分的抗病性。 对sorgoleone的生物合成的先前研究表明,一种或多种烷基间苯二酚合酶(ARS)的参与,其是使用中等至长链脂肪酰辅酶A起始单元通过迭代缩合产生5-烷基间苯二酚的III型聚酮化合物合酶(PKS) 与丙二酰辅酶A。 目前的证据表明,sorgoleone生物合成完全发生在根毛细胞中,涉及合成来自不寻常的16:3脂肪酰辅酶A启动子单元的5-十五碳烯基间苯二酚中间体。 为了表征负责该烷基间苯二酚中间体的生物合成的酶,首先从所有PKS-I序列开始从分离的根毛制备的先前描述的表达序列标签(EST)数据库。 定量实时RT-PCR分析显示,其中两个序列优先在根毛中表达,重组酶研究表明两个序列(命名为ARS1和ARS2)编码能够接受各种脂肪酰辅酶A起始单位的ARS酶 。 此外,针对ARS1和ARS2的RNA干扰(RNAi)实验导致产生显着降低的sorgoleone水平的多个独立转化体事件。 因此,ARS1和ARS2两者都可能参与了山药中的sorgoleone的生物合成。 序列o ARS1和ARS2也用于鉴定编码ARS的几个水稻基因,这些基因可能参与防御相关的烷基苯酚的生产。