関連する実験動画
Updated: Jun 13, 2026

14:28
Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: July 1, 2013
HIVの芽生えたタンパク質ネットワーク
Uta K von Schwedler1, Melissa Stuchell, Barbara Müller
1Department of Biochemistry, University of Utah, Salt Lake City, UT 84132, USA.
Cell
|September 25, 2003
まとめ
HIVを含むウイルスの放出は,多胞体 (MVB) を形成する細胞タンパク質に依存しています. MVB生物発生に不可欠なヒトのEクラスタンパク質のネットワークは,HIV粒子の芽生えと放出に不可欠です.
科学分野:
- 細胞生物学 細胞生物学
- ウイルス学 ウイルス学 ウイルス学
- 分子生物学は分子生物学である.
背景:
- ヒト免疫不全ウイルス (HIV) の放出は,細胞タンパク質のTSG101に依存しています.
- TSG101は,HIVの芽生えに関与する多胞体 (MVB) にタンパク質を分類する.
- HIVの放出におけるMVB生体形成に関与する他のタンパク質の役割は不明である.
研究 の 目的:
- MVBの生殖に関与する他のヒトのEクラスタンパク質が,HIVの放出に関与するかどうかを調査する.
- ヒトのEクラスタンパク質のタンパク質-タンパク質相互作用ネットワークを解明する.
- ウイルスの芽生え過程におけるこれらのタンパク質の直接的関与を決定する.
主な方法:
- ヒトのクラスEタンパク質候補22種を特定しました.
- ネットワークをマッピングするために,タンパク質-タンパク質相互作用の分析.
- ウイルスのガグタンパク質に特定のタンパク質の結合をテストする.
- HIV芽生えに与える影響を評価するために,支配的な陰性変異体の発現.
主要な成果:
- ヒトのクラスEタンパク質22の一貫したネットワークが特定され,43の相互作用によって結びつけられました.
- AIP1は,早期 (TSG101/ESCRT-I) と後期 (CHMP4/ESCRT-III) の経路複合体間の重要なリンクナーであることが判明しました.
- AIP1は,HIV-1p6 (Gag) とEIAVp9 (Gag) のタンパク質に直接結合する.
- HIV-1の粒子にヒトのEクラスタンパク質が検出されました.
- 遅効性E級タンパク質の支配的陰性変異体は,HIV-1の芽生えを阻害した.
結論:
- 人間のMVPバイオゲネシスに不可欠なタンパク質ネットワークが定義されています.
- このネットワーク全体がHIVの放出に参加しています.
- この発見は,このMVB生物発生ネットワークが,他の多くのウイルスの放出に関与している可能性が高いことを示唆しています.
さらに関連する動画
関連する概念動画
Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Immunodeficiency Diseases
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...
There are three main causes of immunodeficiency disorders...
Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...

