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-Structure paper
タイトル | Conformational Plasticity in the HIV-1 Fusion Peptide Facilitates Recognition by Broadly Neutralizing Antibodies. |
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ジャーナル・号・ページ | Cell Host Microbe, Vol. 25, Issue 6, Page 873-883.e5, Year 2019 |
掲載日 | 2019年6月12日 |
著者 | Meng Yuan / Christopher A Cottrell / Gabriel Ozorowski / Marit J van Gils / Sonu Kumar / Nicholas C Wu / Anita Sarkar / Jonathan L Torres / Natalia de Val / Jeffrey Copps / John P Moore / Rogier W Sanders / Andrew B Ward / Ian A Wilson / |
PubMed 要旨 | The fusion peptide (FP) of HIV-1 envelope glycoprotein (Env) is essential for mediating viral entry. Detection of broadly neutralizing antibodies (bnAbs) that interact with the FP has revealed it as ...The fusion peptide (FP) of HIV-1 envelope glycoprotein (Env) is essential for mediating viral entry. Detection of broadly neutralizing antibodies (bnAbs) that interact with the FP has revealed it as a site of vulnerability. We delineate X-ray and cryo-electron microscopy (cryo-EM) structures of bnAb ACS202, from an HIV-infected elite neutralizer, with an FP and with a soluble Env trimer (AMC011 SOSIP.v4.2) derived from the same patient. We show that ACS202 CDRH3 forms a "β strand" interaction with the exposed hydrophobic FP and recognizes a continuous region of gp120, including a conserved N-linked glycan at N88. A cryo-EM structure of another previously identified bnAb VRC34.01 with AMC011 SOSIP.v4.2 shows that it also penetrates through glycans to target the FP. We further demonstrate that the FP can twist and present different conformations for recognition by bnAbs, which enables approach to Env from diverse angles. The variable recognition of FP by bnAbs thus provides insights for vaccine design. |
リンク | Cell Host Microbe / PubMed:31194940 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.76 - 5.2 Å |
構造データ | EMDB-0433, PDB-6nc2: EMDB-0434, PDB-6nc3: PDB-6ncp: |
化合物 | ChemComp-NAG: ChemComp-SO4: ChemComp-GLY: ChemComp-HOH: |
由来 |
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キーワード | IMMUNE SYSTEM (免疫系) / HIV-1 Env / SOSIP / trimer / broadly neutralizing antibody (中和抗体) / fusion peptide (膜融合タンパク質) / VIRAL PROTEIN (ウイルスタンパク質) / antibody (抗体) / HIV (ヒト免疫不全ウイルス) / envelope glycoprotein |