Expanding the versatility of phage display I: efficient display of peptide-tags on protein VII of the filamentous phage.

Expanding the versatility of phage display I: efficient display of peptide-tags on protein VII of the filamentous phage.
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DOI:
10.1371/journal.pone.0014702
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发表时间:
2011-02-24
期刊:
影响因子:
3.7
通讯作者:
Sandlie I
Sandlie I
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Løset GÅ;Bogen B;Sandlie I

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噬菌体展示是选择特异性结合分子的平台,这是提高其性能的明确动机。多肽通常展示为与主要外壳蛋白 VIII (pVIII) 或次要外壳蛋白 III (pIII) 的融合体。除了在 pIII 和 pVIII 上展示的序列外,在其他外壳蛋白(如 pVII)上展示还可以在病毒体上展示异源肽序列。此外,pVII 展示是 pIII 或 pVIII 展示的替代方案。在这里,我们演示了如何用辅助噬菌体补充标准 pIII 或 pVIII 展示噬菌粒,该辅助噬菌体支持在 pVII 上用八角标记、HIS6 或 AviTag 标记的病毒粒子的产生。 pIII 和 pVIII 展示所需的周质信号序列(在早期研究中已添加到 pVII 中)被完全省略。 pVII 上的标记是标准 pIII 和 pVII 显示的一个重要且非常有用的附加功能。任何在 pIII 或 pVIII 上带有目的蛋白的噬菌粒都可以用任何标签进行标记,这仅取决于辅助噬菌体的选择。我们在本文中展示了如何利用此类标签进行单克隆和多克隆噬菌体群体的固定和分离以及纯化和检测。
Phage display is a platform for selection of specific binding molecules and this is a clear-cut motivation for increasing its performance. Polypeptides are normally displayed as fusions to the major coat protein VIII (pVIII), or the minor coat protein III (pIII). Display on other coat proteins such as pVII allows for display of heterologous peptide sequences on the virions in addition to those displayed on pIII and pVIII. In addition, pVII display is an alternative to pIII or pVIII display. Here we demonstrate how standard pIII or pVIII display phagemids are complemented with a helper phage which supports production of virions that are tagged with octa FLAG, HIS6 or AviTag on pVII. The periplasmic signal sequence required for pIII and pVIII display, and which has been added to pVII in earlier studies, is omitted altogether. Tagging on pVII is an important and very useful add-on feature to standard pIII and pVII display. Any phagemid bearing a protein of interest on either pIII or pVIII can be tagged with any of the tags depending simply on choice of helper phage. We show in this paper how such tags may be utilized for immobilization and separation as well as purification and detection of monoclonal and polyclonal phage populations.
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