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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9h1p | ||||||||||||||||||||||||||||||
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タイトル | Mature HIV-1 matrix from MA-SP1 cleavage mutant | ||||||||||||||||||||||||||||||
![]() | (Gag polyprotein) x 2 | ||||||||||||||||||||||||||||||
![]() | VIRAL PROTEIN / HIV-1 / HIV / matrix / mature / spacer peptide 2 / SP2 | ||||||||||||||||||||||||||||||
機能・相同性 | ![]() viral budding via host ESCRT complex / host multivesicular body / ISG15 antiviral mechanism / viral nucleocapsid / viral translational frameshifting / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity / RNA binding ...viral budding via host ESCRT complex / host multivesicular body / ISG15 antiviral mechanism / viral nucleocapsid / viral translational frameshifting / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity / RNA binding / zinc ion binding / membrane 類似検索 - 分子機能 | ||||||||||||||||||||||||||||||
生物種 | ![]() | ||||||||||||||||||||||||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.1 Å | ||||||||||||||||||||||||||||||
![]() | Stacey, J.C.V. / Hrebik, D. / Briggs, J.A.G. | ||||||||||||||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: The conserved HIV-1 spacer peptide 2 triggers matrix lattice maturation. 著者: James C V Stacey / Dominik Hrebík / Elizabeth Nand / Snehith Dyavari Shetty / Kun Qu / Marius Boicu / Maria Anders-Össwein / Pradeep D Uchil / Robert A Dick / Walther Mothes / Hans-Georg ...著者: James C V Stacey / Dominik Hrebík / Elizabeth Nand / Snehith Dyavari Shetty / Kun Qu / Marius Boicu / Maria Anders-Össwein / Pradeep D Uchil / Robert A Dick / Walther Mothes / Hans-Georg Kräusslich / Barbara Müller / John A G Briggs / ![]() ![]() ![]() ![]() 要旨: The virus particles of human immunodeficiency virus type 1 (HIV-1) are released in an immature, non-infectious form. Proteolytic cleavage of the main structural polyprotein Gag into functional ...The virus particles of human immunodeficiency virus type 1 (HIV-1) are released in an immature, non-infectious form. Proteolytic cleavage of the main structural polyprotein Gag into functional domains induces rearrangement into mature, infectious virions. In immature virus particles, the Gag membrane-binding domain, MA, forms a hexameric protein lattice that undergoes structural transition, following cleavage, into a distinct, mature MA lattice. The mechanism of MA lattice maturation is unknown. Here we show that released spacer peptide 2 (SP2), a conserved peptide of unknown function situated about 300 residues downstream of MA, binds MA to induce structural maturation. By high-resolution in-virus structure determination of MA, we show that MA does not bind lipid into a side pocket as previously thought, but instead binds SP2 as an integral part of the protein-protein interfaces that stabilize the mature lattice. Analysis of Gag cleavage site mutants showed that SP2 release is required for MA maturation, and we demonstrate that SP2 is sufficient to induce maturation of purified MA on lipid monolayers in vitro. SP2-triggered MA maturation correlated with faster fusion of virus with target cells. Our results reveal a new, unexpected interaction between two HIV-1 components, provide a high-resolution structure of mature MA, establish the trigger of MA structural maturation and assign function to the SP2 peptide. #1: ![]() タイトル: The conserved HIV-1 spacer peptide 2 triggers matrix lattice maturation. 著者: James C V Stacey / Dominik Hrebík / Elizabeth Nand / Snehith Dyavari Shetty / Kun Qu / Marius Boicu / Maria Anders-Össwein / Robert A Dick / Walther Mothes / Hans-Georg Kräusslich / ...著者: James C V Stacey / Dominik Hrebík / Elizabeth Nand / Snehith Dyavari Shetty / Kun Qu / Marius Boicu / Maria Anders-Össwein / Robert A Dick / Walther Mothes / Hans-Georg Kräusslich / Barbara Müller / John A G Briggs / ![]() ![]() ![]() ![]() 要旨: HIV-1 particles are released in an immature, non-infectious form. Proteolytic cleavage of the main structural polyprotein Gag into functional domains induces rearrangement into mature, infectious ...HIV-1 particles are released in an immature, non-infectious form. Proteolytic cleavage of the main structural polyprotein Gag into functional domains induces rearrangement into mature, infectious virions. In immature virus particles, the Gag membrane binding domain, MA, forms a hexameric protein lattice that undergoes structural transition upon cleavage into a distinct, mature MA lattice. The mechanism of MA lattice maturation is unknown. Here we show that released spacer peptide 2 (SP2), a conserved peptide of unknown function situated ~300 residues downstream of MA, binds MA to induce structural maturation. By high-resolution in-virus structure determination of MA, we show that MA does not bind lipid into a side pocket as previously thought, but instead binds SP2 as an integral part of the protein-protein interfaces that stabilise the mature lattice. Analysis of Gag cleavage site mutants showed that SP2 release is required for MA maturation, and we demonstrate that SP2 is sufficient to induce maturation of purified MA on lipid layers in vitro. SP2-triggered MA maturation correlated with faster fusion of virus with target cells. Our results reveal a new, unexpected interaction between two HIV-1 components, provide a high-resolution structure of mature MA, establish the trigger of MA structural maturation, and assign function to the SP2 peptide. | ||||||||||||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 264.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 215.7 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 48.9 KB | 表示 | |
CIF形式データ | ![]() | 76.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 51769MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 14734.616 Da / 分子数: 12 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: gag / プラスミド: pcHIV / 細胞株 (発現宿主): HEK293T / 器官 (発現宿主): Kidney / 発現宿主: ![]() #2: タンパク質・ペプチド | 分子量: 1845.154 Da / 分子数: 12 / 由来タイプ: 組換発現 / 詳細: spacer peptide 2 由来: (組換発現) ![]() 遺伝子: gag / プラスミド: pcHIV / 細胞株 (発現宿主): HEK293T / 器官 (発現宿主): Kidney / 発現宿主: ![]() Has protein modification | N | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 |
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分子量 |
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由来(組換発現) |
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ウイルスについての詳細 | 中空か: NO / エンベロープを持つか: YES / 単離: STRAIN / タイプ: VIRUS-LIKE PARTICLE | |||||||||||||||||||||||||
天然宿主 |
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ウイルス殻 |
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緩衝液 | pH: 7.4 / 詳細: PBS | |||||||||||||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: purified HIV-1 MA-SP1 particles in PBS | |||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R2/2 | |||||||||||||||||||||||||
急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE-PROPANE / 湿度: 100 % / 凍結前の試料温度: 293 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 3600 nm / 最小 デフォーカス(公称値): 600 nm / Calibrated defocus min: 450 nm / 最大 デフォーカス(補正後): 4500 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: ZEMLIN TABLEAU |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER 最高温度: 93 K / 最低温度: 88 K |
撮影 | 平均露光時間: 4 sec. / 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 撮影したグリッド数: 1 / 実像数: 14222 / 詳細: EER mode |
電子光学装置 | エネルギーフィルター名称: TFS Selectris / エネルギーフィルタースリット幅: 15 eV |
画像スキャン | サンプリングサイズ: 14 µm / 横: 4096 / 縦: 4096 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 5704512 詳細: A new model was trained in crYOLO using a training dataset annotated in a randomly selected set of 50-100 micrographs. Annotation was performed in the crYOLO boxmanager GUI placing positions ...詳細: A new model was trained in crYOLO using a training dataset annotated in a randomly selected set of 50-100 micrographs. Annotation was performed in the crYOLO boxmanager GUI placing positions all over the visible surface of an HIV virus particle. The picks did not distinguish individual proteins or membranes. | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C3 (3回回転対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 5486693 / アルゴリズム: BACK PROJECTION / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 52.49 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: cross-correlation | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 2H3I PDB chain-ID: A / Accession code: 2H3I / Source name: PDB / タイプ: experimental model |