発現したタンパク質結合と生物結合のためのセレノシステインの使用
Jun Liu1, Qingqing Chen1, Sharon Rozovsky1
1Department of Chemistry & Biochemistry, University of Delaware , Newark, Delaware 19716, United States.
Journal of the American Chemical Society
|February 11, 2017
まとめ
この研究では,セレノシステイン媒介の結合により,異質的に発現したタンパク質の断片を用いたタンパク質工学の新しい方法が導入されています. このアプローチは,以前の制限を克服し,タンパク質の改変とエスカフォードの設計においてより大きな柔軟性を可能にします.
科学分野:
- 生物化学
- タンパク質工学
- 合成生物学
背景:
- エクスプレスされたタンパク質結合 (EPL) は強力なタンパク質工学技術である.
- セレノシステインを使用する現在のEPL方法は,固体相合成とペプチドサイズによって制限されています.
- タンパク質に変化を正確に 配置することは依然として課題です
研究 の 目的:
- セレノシステイン媒介による結合における固体相合成の限界を克服する.
- ヘテロロジで発現したセレノ断片を用いて柔軟でサイト特異なタンパク質の改変を可能にします.
- 複雑なタンパク質構造を生み出すために,発現したタンパク質結合の有用性を拡大する.
主な方法:
- ヘテロロジで発現したセレノ断片を結合のために利用した.
- セレノシステイン媒介の化学結合により,タンパク質の断片を結合する.
- 結合したセレノシステインをアラニンまたはセリンに脱セリン化した.
主要な成果:
- セレノシステイン媒介の結合で 位置と大きさの制限を克服しました
- 発現したタンパク質の断片を結合させるのに高い生産性と効率性を達成した.
- 修正された結合部位でノンセレノプロテインを形成する能力を示した.
結論:
- ヘテロロジで表現されたセレノ断片は,EPLの能力を著しく高めます.
- この方法は,ネイティブシステインに影響を与えることなく,柔軟でサイト固有のタンパク質の修正を可能にします.
- このアプローチは,翻訳後の修正をタンパク質の構造に組み込むことを簡素化します.
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