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    • 2. 发明授权
    • Reagents for transfection of eukaryotic cells
    • 用于转染真核细胞的试剂
    • US07915230B2
    • 2011-03-29
    • US11434765
    • 2006-05-17
    • Joel JesseeGulilat Gebeyehu
    • Joel JesseeGulilat Gebeyehu
    • A61K48/00A61K38/16C12N15/00
    • C07K14/005A61K47/6455C12N15/87C12N2720/12022
    • Compositions and methods for improved delivery of macromolecules into eukaryotic cells are provided. Fusogenic peptides from fusion proteins of non-enveloped viruses enhance the efficiency of transfection of eukaryotic cells mediated by transfection agents such as cationic lipids, polycationic polymers such as PEI and dendrimers. These fusogenic peptides are used as part of a transfection complex that efficiently delivers a macromolecule, for example, a nucleic acid, into a eukaryotic cell. Novel cationic lipids and compositions of cationic lipids also are provided that may be used for the introduction of macromolecules such as nucleic acids, proteins and peptides into a variety of cells and tissues. The lipids can be used alone, in combination with other lipids and/or in combination with fusogenic peptides to prepare transfection complexes.
    • 提供了将大分子转运到真核细胞中的组合物和方法。 来自非包膜病毒融合蛋白的融合肽提高了转染试剂如阳离子脂质,聚阳离子聚合物如PEI和树枝状大分子介导的真核细胞的转染效率。 这些融合肽用作转染复合物的一部分,其将大分子例如核酸有效地递送到真核细胞中。 还提供了新的阳离子脂质和阳离子脂质的组合物,其可用于将大分子如核酸,蛋白质和肽引入多种细胞和组织中。 脂质可以单独使用,与其他脂质组合使用和/或与融合肽组合使用以制备转染复合物。
    • 5. 发明授权
    • Viral polyhedra complexes and methods of use
    • 病毒多面体复合物及其使用方法
    • US08554493B2
    • 2013-10-08
    • US12529110
    • 2008-02-28
    • Peter MetcalfFasseli Joseph CoulibalyHajime MoriNorio HamadaKeiko IkedaYui Lam Elaine ChiuHiroshi Ijiri
    • Peter MetcalfFasseli Joseph CoulibalyHajime MoriNorio HamadaKeiko IkedaYui Lam Elaine ChiuHiroshi Ijiri
    • G06F19/00
    • C07K14/005A01N25/34A01N63/00A61K47/6901A61K47/6949B82Y5/00C07K14/475C07K14/485C07K14/50C07K2319/735C12N2710/14043C12N2720/12022A01N61/00A01N63/02A01N2300/00
    • Cypoviruses and baculoviruses are notoriously difficult to eradicate because the virus particles are embedded in micron-sized protein crystals called polyhedra. The remarkable stability of polyhedra means that like bacterial spores these insect viruses remain infectious for years in soil. Although these unique in vivo protein crystals have been extensively characterized since the early 1900s, their atomic organization remains elusive. Here we describe the 2 crystal structure of both recombinant and infectious silkworm cypovirus polyhedra determined using 5-12 micron crystals purified from insect cells. These are the smallest crystals yet used for de novo X-ray protein structure determination. It was found that polyhedra are made of trimers of the viral polyhedrin protein and contain nucleotides. Although the shape of these building blocks is reminiscent of some capsid trimers, polyhedrin has a new fold and has evolved to assemble in vivo into 3-D cubic crystals rather than icosahedral shells. The polyhedrin trimers are extensively cross-linked in polyhedra by non-covalent interactions and pack with an exquisite molecular complementarity similar to that of antigen-antibody complexes. The resulting ultra-stable and sealed crystals shield the virus particles from environmental damage. The structure suggests that polyhedra can serve as the basis for the development of robust and versatile nanoparticles for biotechnological applications such as in cell culture systems, microarrays and biopesticides.
    • 由于病毒颗粒嵌入称为多面体的微米级蛋白质晶体中,Cypoviruses和杆状病毒众所周知难以根除。 多面体的显着稳定意味着像细菌孢子一样,这些昆虫病毒在土壤中仍然具有传染性多年。 虽然这些独特的体内蛋白质晶体自20世纪初以来已被广泛地表征,但它们的原子组织仍然难以捉摸。 这里我们描述使用从昆虫细胞纯化的5-12微米晶体测定的重组和感染性蚕病毒多面体的2晶体结构。 这些是用于从头X射线蛋白质结构测定的最小晶体。 发现多面体由病毒多角体蛋白的三聚体构成并含有核苷酸。 尽管这些结构单元的形状让人联想到一些衣壳三聚体,但多角体蛋白具有新的折叠,并已发展成体内装配成3-D立方晶体而不是二十面体壳。 多面体三聚体通过非共价相互作用在多面体中广泛交联,并具有类似于抗原 - 抗体复合物的精细分子互补性。 所得到的超稳定和密封的晶体屏蔽病毒颗粒免受环境破坏。 该结构表明,多面体可以作为开发用于生物技术应用的强壮和多功能纳米颗粒的基础,例如在细胞培养系统,微阵列和生物杀虫剂中。
    • 8. 发明申请
    • MEMBRANE FUSION PROTEINS DERIVED FROM REOVIRUS
    • 从REOVIRUS衍生的膜蛋白融合蛋白
    • US20080124793A1
    • 2008-05-29
    • US11952714
    • 2007-12-07
    • Roy DUNCAN
    • Roy DUNCAN
    • C12N5/06C07K14/00C07K16/18C12N15/11
    • C07K14/005C12N2720/12022
    • In accordance with the present invention, a family of membrane fusion protein and polynucleotides encoding the proteins have been identified. The proteins and nucleotides are derived from the family Reoviridae. Two membrane fusion proteins have been isolated from reoviruses isolated from poikilothermic hosts: the p14 protein from reptilian reovirus (RRV) isolated from python, and the p16 protein from aquareovirus (AQV) isolated from salmon. The genes encoding these proteins have been cloned and sequenced. Analysis of the amino acid sequences of these proteins show that both lack the typical fusion peptide motif found in other membrane fusion proteins. Expression of these proteins in cells results in cell-cell fusion.
    • 根据本发明,已经鉴定了一系列膜融合蛋白和编码该蛋白的多核苷酸。 蛋白质和核苷酸来源于家禽病毒科。 从poikilothermic宿主分离的呼肠孤病毒中分离出两种膜融合蛋白:从蟒蛇分离的爬行动物呼肠孤病毒(RRV)的p14蛋白和从鲑鱼分离的来自水痘病毒(AQV)的p16蛋白。 编码这些蛋白质的基因已被克隆并测序。 这些蛋白质的氨基酸序列分析表明,缺乏其他膜融合蛋白中发现的典型融合肽基序。 这些蛋白质在细胞中的表达导致细胞 - 细胞融合。