National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
U54 AI170791
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01 AI178846
米国
引用
ジャーナル: bioRxiv / 年: 2024 タイトル: Structural insights into inhibitor mechanisms on immature HIV-1 Gag lattice revealed by high-resolution single-particle cryo-EM. 著者: Chunxiang Wu / Megan E Meuser / Juan S Rey / Hamed Meshkin / Rachel Yang / Swapnil Chandrakant Devarkar / Christian Freniere / Jiong Shi / Christopher Aiken / Juan R Perilla / Yong Xiong / 要旨: HIV-1 inhibitors, such as Bevirimat (BVM) and Lenacapavir (LEN), block the production and maturation of infectious virions. However, their mechanisms remain unclear due to the absence of high- ...HIV-1 inhibitors, such as Bevirimat (BVM) and Lenacapavir (LEN), block the production and maturation of infectious virions. However, their mechanisms remain unclear due to the absence of high-resolution structures for BVM complexes and LEN's structural data being limited to the mature capsid. Utilizing perforated virus-like particles (VLPs) produced from mammalian cells, we developed an approach to determine cryo-electron microscopy (cryo-EM) structures of HIV-1 with inhibitors. This allowed for the first structural determination of the native immature HIV-1 particle with BVM and LEN bound inside the VLPs at high resolutions. Our findings offer a more accurate model of BVM engaging the Gag lattice and, importantly, demonstrate that LEN not only binds the mature capsid but also targets the immature lattice in a distinct manner. The binding of LEN induces a conformational change in the capsid protein (CA) region and alters the architecture of the Gag lattice, which may affect the maturation process. These insights expand our understanding of the inhibitory mechanisms of BVM and LEN on HIV-1 and provide valuable clues for the design of future inhibitors.
全体 : Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE)
全体
名称: Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE) (ヒト免疫不全ウイルス)
要素
ウイルス: Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE) (ヒト免疫不全ウイルス)
タンパク質・ペプチド: Gag polyprotein
リガンド: INOSITOL HEXAKISPHOSPHATE
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超分子 #1: Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE)
超分子
名称: Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE) タイプ: virus / ID: 1 / 親要素: 0 / 含まれる分子: #1 詳細: NL-MA/NC DNA was transfected into Expi293F (ThermoTisher) cells and cultured in suspension culture. The enveloped virion like particles were purified by filtration and ultracentrifugation, ...詳細: NL-MA/NC DNA was transfected into Expi293F (ThermoTisher) cells and cultured in suspension culture. The enveloped virion like particles were purified by filtration and ultracentrifugation, and directly used as cryo-EM sample. NCBI-ID: 11698 生物種: Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE) Sci species strain: Clone pNL4-3 / ウイルスタイプ: VIRUS-LIKE PARTICLE / ウイルス・単離状態: STRAIN / ウイルス・エンベロープ: Yes / ウイルス・中空状態: Yes
詳細: This is the final buffer in which the enveloped viral-like particle was resuspended. The Gag-CA-SP1 lattice is inside the virus-like particle and not directly in the buffer environment.
グリッド
モデル: Quantifoil R2/1 / 材質: COPPER / メッシュ: 300
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 295 K / 装置: FEI VITROBOT MARK III
詳細
NL-MA/NC DNA was transfected into Expi293F (thermofisher) cells and cultured in suspension culture. The enveloped virion like particles were purified by filtration and ultracentrifugation, and directly used as cryo-EM sample.
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 50.0 e/Å2