PTEXは,マラリア寄生虫のタンパク質輸出に不可欠な繋がりです
Brendan Elsworth1, Kathryn Matthews2, Catherine Q Nie3
11] Macfarlane Burnet Institute for Medical Research and Public Health, Melbourne, 3004, Australia [2] Monash University, Clayton, Victoria, 3800, Australia [3].
Nature
|July 22, 2014
まとめ
輸出されたタンパク質 (PTEX) のプラズモディウムトランスロコン装置は,すべてのマラリア寄生虫タンパク質の輸出に不可欠です. PTEXを妨害すると,寄生虫の成長と毒性の要因の輸出がひどく損なわれ,重要な薬物標的として特定されます.
科学分野:
- マラリア学 マラリア学
- 分子寄生生物学の分子寄生学
- タンパク質の密輸 タンパク質の密輸
背景:
- マラリアの寄生虫は,毒性と成長に不可欠な何百ものタンパク質を輸出する.
- タンパク質輸出の仕組みを理解することは,新しい抗マラリア薬の開発に不可欠です.
- 輸出されたタンパク質 (PTEX) のプラズモディアム・トランスロコン複合体は,この輸出を媒介する候補である.
研究 の 目的:
- マラリア寄生虫におけるタンパク質転位におけるPTEX複合体の役割と範囲を調査する.
- 様々な種類の寄生虫タンパク質の輸出にPTEXが不可欠であるかどうかを判断する.
- 寄生虫の成長と毒性に対するPTEX機能障害の影響を評価する.
主な方法:
- 重要な (HSP101,PTEX150) と非重要な (TRX2) PTEXコンポーネントに欠陥があるプラズモジアム・ファルシパラムの寄生虫系を生成する.
- 寄生虫の二重膜障壁を越えたタンパク質の密輸の分析.
- 寄生虫の成長と発達の評価 in vitroおよびin vivo.
主要な成果:
- 重要なPTEXコンポーネントの欠陥により,PEXELモチーフおよびPEXEL陰性タンパク質を含む,すべてのクラスの輸出タンパク質の密輸が著しく減少しました.
- PfEMP1などの表面タンパク質の輸出は,PTEXノックダウン寄生虫で顕著に減少しました.
- PTEX機能は,血液段階の成長に不可欠であり,ごくわずかなノックダウンでも,赤血球循環に深刻な影響を与える.
結論:
- PTEXは,マラリア寄生虫のタンパク質輸出の中心的な機構である.
- PTEXは寄生虫の成長と毒性の要因の輸出に不可欠です.
- PTEXは,マラリア治療の有望な薬剤標的である.
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