| Genome Editing in Diatoms Using CRISPR-Cas to Induce Precise Bi-allelic Deletions
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Author:
Date:
2017-12-05
[Abstract] Genome editing in diatoms has recently been established for the model species Phaeodactylum tricornutum and Thalassiosira pseudonana. The present protocol, although developed for T. pseudonana, can be modified to edit any diatom genome as we utilize the flexible, modular Golden Gate cloning system. The main steps include how to design a construct using Golden Gate cloning for targeting two sites, allowing a precise deletion to be introduced into the target gene. The transformation protocol is explained, as are the methods for screening using band shift assay and/or restriction site loss.
[摘要] 最近为三角褐指藻（Phaeodactylum tricornutum）和海绵假丝酵母（Thalassiosira pseudonana）建立了硅藻基因组编辑。 目前的协议，虽然开发的 T。 pseudonana ，可以修改编辑任何硅藻基因组，因为我们利用灵活，模块化的金门克隆系统。 主要步骤包括如何设计构建使用金门克隆靶向两个网站，允许一个精确的删除被引入目标基因。 解释转化方案，以及使用带移位测定和/或限制性位点丢失进行筛选的方法。
【背景】CRISPR-Cas正在迅速成为分子研究的一个关键方法。基于在细菌和古细菌中发现的病毒防御机制，CRISPR-Cas诱导基因组中精确位置的双链断裂（DSBs）。它涉及使用与CRISPR ...
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| Trimolecular Fluorescence Complementation (TriFC) Assay for Direct Visualization of RNA-Protein Interaction in planta
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Author:
Date:
2017-10-20
[Abstract] RNA-Protein interactions play important roles in various eukaryotic biological processes. Molecular imaging of subcellular localization of RNA/protein complexes in plants is critical for understanding these interactions. However, methods to image RNA-Protein interactions in living plants have not yet been developed until now. Recently, we have developed a trimolecular fluorescence complementation (TriFC) system for in vivo visualization of RNA-Protein interaction by transient expression in tobacco leaves. In this method, we combined conventional bimolecular fluorescence complementation (BiFC) system with MS2 system (phage MS2 coat protein [MCP] and its binding RNA sequence [MS2 sequence]) (Schonberger et al., 2012). Target RNA is tagged with 6xMS2 and MCP and RNA binding ...
[摘要] RNA-蛋白质相互作用在各种真核生物过程中起重要作用。 RNA /蛋白质复合物在植物中亚细胞定位的分子成像对于理解这些相互作用至关重要。然而，到目前为止，尚未开发在活植物中形成RNA-蛋白质相互作用的方法。最近，我们开发了一种三分子荧光互补（TriFC）系统，用于在烟草叶中瞬时表达的RNA-蛋白质相互作用的体内可视化。在这种方法中，我们将传统的双分子荧光互补（BiFC）系统与MS2系统（噬菌体MS2外壳蛋白[MCP]及其结合RNA序列[MS2序列]）（Schonberger等人，2012）相结合， 。目标RNA用6xMS2标记，MCP和RNA结合蛋白与YFP片段融合。编码这种融合RNA和蛋白质的DNA构建体用土壤杆菌悬浮液渗入烟草叶中。通过共焦显微镜观察体内的RNA-蛋白质相互作用
【背景】近来，多种类型的长非编码RNA（lncRNA）已经被鉴定并显示出在转录调节和染色质修饰中起重要作用（St Laurent等人，2015）。到目前为止，lncRNA介导的功能的大多数分子机制与RNA-蛋白质相互作用密切相关（St ...
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| Telomere-mediated Chromosomal Truncation via Agrobacterium tumefaciens or Particle Bombardment to Produce Engineered Minichromosomes in Plants
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Author:
Date:
2015-09-20
[Abstract] Minichromosomes are small, autonomously functioning chromosomes that exist separately from the normal chromosomal set. Creation of minichromosomes in plants relies on telomere truncation to remove the chromosome arms and the native telomere sequence and replace them with a transgene together with a new telomere sequence to generate a modifiable small chromosome. Telomere truncation has been accomplished utilizing both Agrobacterium tumefaciens, in which a telomere repeat sequence is cloned into the transformation vector near the right border, and particle bombardment, in which the genes of interest and telomere sequence are co-introduced into the plant. In this protocol we will describe the methods for introducing telomere sequences to both Agrobacterium and gold ...
[摘要] 微染色体是与正常染色体组分开存在的小的，自主功能的染色体。 在植物中创建微染色体依赖于端粒截短以去除染色体臂和天然端粒序列，并用新的端粒序列替代它们，以产生可修饰的小染色体。 使用根癌土壤杆菌（Agrobacterium tumefaciens）进行端粒截短，其中端粒重复序列被克隆到右边界附近的转化载体中，以及粒子轰击，其中感兴趣的基因和端粒序列是共同的， 引进工厂。 在该方案中，我们将描述将端粒序列引入到农杆菌和金颗粒中的方法，以及验证这些序列是完整的所需的方法。
[简介] 工程化的微染色体是自主功能的染色体，其包含通过细胞周期维持所需的所有必需组分。工程化微染色体的生产具有下一代遗传工程的几个潜在应用（Gaeta等人，2012）。通过组装着丝粒，复制起点和全部由端粒序列封端的可选择标记，如最初在酵母中进行的染色体的构建由于着丝粒序列的表观遗传学性质而在植物中是不可行的（Birchler和Han，2009; Birchler 等人，2011; ...
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