著作: Yokoyama, M./[野間口 雅子]/Doi, N./Kanda, T./[足立 昭夫]/Sato, H./In silico analysis of HIV-1 Env-gp20 reveals structural bases for viral adaptation in growth-restrictive cells./[Frontiers in Microbiology]
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削除する| 種別 | 必須 | 学術論文(審査論文) | |||
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| 言語 | 必須 | 英語 | |||
| 招待 | 推奨 | ||||
| 審査 | 推奨 | ||||
| カテゴリ | 推奨 | ||||
| 共著種別 | 推奨 | ||||
| 学究種別 | 推奨 | ||||
| 組織 | 推奨 | ||||
| 著者 | 必須 | ||||
| 題名 | 必須 |
(英) In silico analysis of HIV-1 Env-gp20 reveals structural bases for viral adaptation in growth-restrictive cells. |
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| 副題 | 任意 | ||||
| 要約 | 任意 |
(英) Variable V1/V2 and V3 loops on human immunodeficiency virus type 1 (HIV-1) envelope-gp120 core play key roles in modulating viral competence to recognize two infection receptors, CD4 and chemokine-receptors. However, molecular bases for the modulation largely remain unclear. To address these issues, we constructed structural models for a full-length gp120 in CD4-free and -bound states. The models showed topologies of gp120 surface loop that agree with those in reported structural data. Molecular dynamics simulation showed that in the unliganded state, V1/V2 loop settled into a thermodynamically stable arrangement near V3 loop for conformational masking of V3 tip, a potent neutralization epitope. In the CD4-bound state, however, V1/V2 loop was rearranged near the bound CD4 to support CD4 binding. In parallel, cell-based adaptation in the absence of anti-viral antibody pressures led to the identification of amino acid substitutions that individually enhance viral entry and growth efficiencies in association with reduced sensitivity to CCR5 antagonist TAK-779. Notably, all these substitutions were positioned on the receptors binding surfaces in V1/V2 or V3 loop. In silico structural studies predicted some physical changes of gp120 by substitutions with alterations in viral replication phenotypes. These data suggest that V1/V2 loop is critical for creating a gp120 structure that masks co-receptor binding site compatible with maintenance of viral infectivity, and for tuning a functional balance of gp120 between immune escape ability and infectivity to optimize HIV-1 replication fitness. |
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| キーワード | 推奨 | ||||
| 発行所 | 推奨 | ||||
| 誌名 | 必須 |
Frontiers in Microbiology(Frontiers Media S.A.)
(eISSN: 1664-302X)
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| 巻 | 必須 | 7 | |||
| 号 | 必須 | 110 | |||
| 頁 | 必須 | --- | |||
| 都市 | 任意 | ||||
| 年月日 | 必須 | 2016年 2月 9日 | |||
| URL | 任意 | ||||
| DOI | 任意 | 10.3389/fmicb.2016.00110 (→Scopusで検索) | |||
| PMID | 任意 | 26903989 (→Scopusで検索) | |||
| CRID | 任意 | ||||
| WOS | 任意 | ||||
| Scopus | 任意 | ||||
| 評価値 | 任意 | ||||
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| 指導教員 | 推奨 | ||||
| 備考 | 任意 |
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