| Micro-chromatin Immunoprecipitation (μChIP) Protocol for Real-time PCR Analysis of a Limited Amount of Cells
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Author:
Date:
2016-06-20
[Abstract] Chromatin immunoprecipitation followed by deep sequencing (ChIP-Seq) is an important strategy to study gene regulation. When availability of cells is limited, however, it can be useful to focus on specific genes to investigate in depth the role of transcription factors or histone marks. Unfortunately, performing ChIP experiments to study transcription factors’ binding to DNA can be difficult when biological material is restricted. This protocol describes a robust method to perform μChIP for over-expressed or endogenous transcription factors using ~100,000 cells per ChIP experiment (Masserdotti et al., 2015). We also describe optimization steps, which we think are critical for this protocol to work and which can be used to further reduce the number of cells.
[摘要] 染色质免疫沉淀后深层测序（ChIP-Seq）是研究基因调控的重要策略。 然而，当细胞的可用性有限时，可能有用的是专注于特定的基因深入研究转录因子或组蛋白标记的作用。 不幸的是，当生物材料受到限制时，进行ChIP实验以研究转录因子与DNA的结合可能是困难的。 该方案描述了使用约100,000个细胞/ChIP实验对过表达或内源性转录因子进行μChIP的稳健方法（Masserdotti等人，2015）。 我们还描述了优化步骤，我们认为这是协议工作的关键，可以用于进一步减少单元格的数量。
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| VAMP8-3xHA Uptake Assay in HeLa Cells
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Author:
Date:
2016-02-20
[Abstract] Transmembrane proteins are rarely exclusively localized to a specific vesicle or an organelle. Most transmembrane proteins undergo complicated trafficking routes. Thus, transmembrane proteins are under constant flux, and at steady state, found on a variety of vesicles or organelles. This characteristic makes the study of their trafficking routes complex, since at any given moment, different molecules are often being trafficked in opposing directions. Pulse-chase experiments can temporally track a specific pool of a transmembrane protein of interest, allowing for the kinetic description of its trafficking route. This type of technique has been used extensively to follow a large array of plasma membrane localized proteins (Diril et al., 2006; Jean et al., 2010). Here, we ...
[摘要] 跨膜蛋白很少专门定位于特定的囊泡或细胞器。大多数跨膜蛋白经历复杂的运输路线。因此，跨膜蛋白在恒定通量下，并在稳定状态，发现在各种囊泡或细胞器。这个特征使得他们的贩运路线的研究复杂，因为在任何给定时刻，不同的分子通常在相反的方向上被贩运。脉冲追踪实验可以暂时跟踪感兴趣的跨膜蛋白的特定池，允许其运输路线的动力学描述。这种类型的技术已广泛用于跟踪大量的质膜定位蛋白质（Diril等人，2006; Jean等人，2010）。在这里，我们描述了一种方法，允许研究VAMP8贩运从质膜到内溶酶体隔室。该方法用于描述 MTMR13 和 RAB21 在调节VAMP8向内溶酶体的运输中的作用（Jean等人，，2015）。
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