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-Structure paper
| タイトル | Arg18 Substitutions Reveal the Capacity of the HIV-1 Capsid Protein for Non-Fullerene Assembly. |
|---|---|
| ジャーナル・号・ページ | Viruses, Vol. 16, Issue 7, Year 2024 |
| 掲載日 | 2024年6月27日 |
著者 | Randall T Schirra / Nayara F B Dos Santos / Barbie K Ganser-Pornillos / Owen Pornillos / ![]() |
| PubMed 要旨 | In the fullerene cone HIV-1 capsid, the central channels of the hexameric and pentameric capsomers each contain a ring of arginine (Arg18) residues that perform essential roles in capsid assembly and ...In the fullerene cone HIV-1 capsid, the central channels of the hexameric and pentameric capsomers each contain a ring of arginine (Arg18) residues that perform essential roles in capsid assembly and function. In both the hexamer and pentamer, the Arg18 rings coordinate inositol hexakisphosphate, an assembly and stability factor for the capsid. Previously, it was shown that amino-acid substitutions of Arg18 can promote pentamer incorporation into capsid-like particles (CLPs) that spontaneously assemble in vitro under high-salt conditions. Here, we show that these Arg18 mutant CLPs contain a non-canonical pentamer conformation and distinct lattice characteristics that do not follow the fullerene geometry of retroviral capsids. The Arg18 mutant pentamers resemble the hexamer in intra-oligomeric contacts and form a unique tetramer-of-pentamers that allows for incorporation of an octahedral vertex with a cross-shaped opening in the hexagonal capsid lattice. Our findings highlight an unexpected degree of structural plasticity in HIV-1 capsid assembly. |
リンク | Viruses / PubMed:39066201 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.7 - 7.1 Å |
| 構造データ | ![]() EMDB-43632: HIV-1 CA R18L tetramer-of-pentamers ![]() EMDB-43633: HIV-1 CA R18L single-pentamer declination ![]() EMDB-43634: HIV-1 CA R18A tetramer-of-pentamers ![]() EMDB-43635: HIV-1 CA R18G tetramer-of-pentamers ![]() EMDB-43636: HIV-1 CA R18L capsid-like particle assembled in 1 M NaCl bound to FG-peptide ![]() EMDB-43637: HIV-1 CA R18L capsid-like particle assembled with FG-peptide ![]() EMDB-43638: HIV-1 CA R18L octahedron assembled with FG-peptide EMDB-43641, PDB-8vxv: EMDB-43642, PDB-8vxw: |
| 由来 |
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キーワード | VIRUS LIKE PARTICLE / capsid |
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human immunodeficiency virus 1 (ヒト免疫不全ウイルス)
Homo sapiens (ヒト)
キーワード