Ferrous Ammonium Sulfate Hexahydrate (FAS)

Company: Sigma-Aldritch

Catalog#: FX0245

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Dynamic and Sequential Protein Reconstitution on Negatively Curved Membranes by Giant Vesicles Fusion

Nicola de Franceschi, Maryam Alqabandi, Winfried Weissenhorn and Patricia Bassereau

Published online: 2019-07-05

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Production and Isolation of Magnetic Protein Crystals in HEK293T Cells

Author:

Thomas L. Li and Bianxiao Cui,

Date:

2020-07-20

[Abstract] Advances in protein engineering have enabled the production of self-assembled protein crystals within living cells. Our recent publication demonstrates the production of ftn-PAK4, which is a ferritin-containing crystal that can mineralize iron and become magnetic when isolated. We have developed an optimized protocol for the production and isolation of PAK4-based crystals. The crystals are first grown in low-passage HEK293T cells, released using a lysis buffer containing NP-40 and DNase, and collected under careful centrifugation conditions. Our protocol maximizes the purity and yield of crystals and is quick and straightforward.
[摘要] [摘要] 蛋白质工程的进展已使活细胞内产生自组装的蛋白质晶体。我们的最新出版物证明了ftn-PAK4的生产，它是一种含铁蛋白的晶体，在分离时可以矿化铁并成为磁性。我们已经开发出用于生产和分离基于PAK4的晶体的优化协议。晶体首先在低传代的HEK293T细胞中生长，使用含有NP-40和DNase的裂解缓冲液释放，并在仔细的离心条件下收集。我们的协议可最大程度地提高晶体的纯度和收率，并且操作简便快捷。

[背景] 近来的作品曾报道的“生产和隔离在纤维素的” 晶体通过蛋白在活细胞中的异源表达。这些晶体具有多种应用，例如货物运输（Ijiri 等，2009）或X射线结构测定（Baska ran 和Ang ，2015）。晶体的性质而变化，但它们通常相对于相当大的是对细胞，范围从1-2 微米到数百微米的大小（圣豪等人，2015）。在我们最近的工作中，我们修改了inka-PAK4晶体以创建ftn-PAK4，该ftn-PAK4是一种含铁蛋白的晶体，可以矿化足够的铁以吸引附近的永磁体（Li 等，2019）。

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Ferrous Ammonium Sulfate Hexahydrate (FAS)

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