HIV-1 Nefは,SERINC5をビリオンの組み込みから排除することによって感染を促進します
Annachiara Rosa1, Ajit Chande1, Serena Ziglio1
1University of Trento, Centre for Integrative Biology, 38123 Trento, Italy.
Nature
|September 30, 2015
まとめ
ヒト免疫不全ウイルス1型 (HIV-1) Nefタンパク質は,HIV-1の感染性を抑制する宿主タンパク質であるSERINC5の抗ウイルス活性に対抗する. Nefは,SERINC5を新しいウイルス粒子に組み込み,それによってウイルスの拡散を増加させます.
科学分野:
- ウイルス学
- 細胞生物学
- 免疫学
背景:
- HIV-1 Nefタンパク質は宿主細胞のプロセスを調節し,未知のメカニズムを通じてウイルスの感染性を高めます.
- HIV-1の複製と拡散に影響を与える宿主因は,治療介入の重要なターゲットです.
研究 の 目的:
- HIV-1 ウイルスの感染性を制御する宿主因を特定する.
- HIV-1 Nefがウイルス感染性を高めるメカニズムを解明する.
主な方法:
- Nefと宿主タンパク質の相互作用を特定するための共免疫降水および免疫光測定法.
- ウイルス粒子の構成と感染性の分析,SERINCタンパク質の存在と欠如.
- HIV-1の芽生え中の宿主細胞におけるSERINC5の局所化を追跡するためのコンフォカル顕微鏡検査.
主要な成果:
- SERINC5とSERINC3は,HIV-1粒子感染性の強力な阻害剤として特定されました.
- SERINC5はプラズマ膜に局所化し,芽生えたビリオンに組み込まれ,感染性を低下させます.
- HIV- 1 Nefは,SERINC5をRab7- 陽性エンドソームに誘導し,それをビリオンから排除します.
- ネフのSERINC5に対抗する能力は,霊長類のレンチウイルスと,マウンの白血病ウイルスのグリコシル化ガグに収束しています.
結論:
- SERINC5はHIV-1の感染性を抑制する重要な宿主制限因子です.
- HIV-1 NefはSERINC5と対抗するように進化し,ウイルスの病原性における重要なステップを表しています.
- SERINC5の強力な抗レトロウイルス活性により,治療目標としての可能性が強調されています.
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