+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-23993 | ||||||||||||||||||
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タイトル | Structure of the adeno-associated virus 9 capsid at pH 5.5 | ||||||||||||||||||
マップデータ | AAV9 capsid structure at pH 5.5 | ||||||||||||||||||
試料 |
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キーワード | adeno-associated virus / pH / phospholipase-A2 / capsid / gene therapy / AAV9 / dependoparvovirus / intracellular trafficking / endosome / VIRUS LIKE PARTICLE | ||||||||||||||||||
機能・相同性 | Phospholipase A2-like domain / Phospholipase A2-like domain / Parvovirus coat protein VP2 / Parvovirus coat protein VP1/VP2 / Parvovirus coat protein VP2 / Capsid/spike protein, ssDNA virus / T=1 icosahedral viral capsid / structural molecule activity / Capsid protein VP1 機能・相同性情報 | ||||||||||||||||||
生物種 | Adeno-associated virus 9 (アデノ随伴ウイルス) | ||||||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.79 Å | ||||||||||||||||||
データ登録者 | Penzes JJ / Chipman P | ||||||||||||||||||
資金援助 | 米国, 5件
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引用 | ジャーナル: J Virol / 年: 2021 タイトル: Adeno-associated Virus 9 Structural Rearrangements Induced by Endosomal Trafficking pH and Glycan Attachment. 著者: Judit J Penzes / Paul Chipman / Nilakshee Bhattacharya / Allison Zeher / Rick Huang / Robert McKenna / Mavis Agbandje-McKenna / 要旨: Adeno-associated viruses (AAVs) are small nonenveloped single-stranded DNA (ssDNA) viruses that are currently being developed as gene therapy biologics. After cell entry, AAVs traffic to the nucleus ...Adeno-associated viruses (AAVs) are small nonenveloped single-stranded DNA (ssDNA) viruses that are currently being developed as gene therapy biologics. After cell entry, AAVs traffic to the nucleus using the endo-lysosomal pathway. The subsequent decrease in pH triggers conformational changes to the capsid that enable the externalization of the capsid protein (VP) N termini, including the unique domain of the minor capsid protein VP1 (VP1u), which permits the phospholipase activity required for the capsid lysosomal egress. Here, we report the AAV9 capsid structure, determined at the endosomal pHs (7.4, 6.0, 5.5, and 4.0), and terminal galactose-bound AAV9 capsids at pHs 7.4 and 5.5 using cryo-electron microscopy and three-dimensional image reconstruction. Taken together, these studies provide insight into AAV9 capsid conformational changes at the 5-fold pore during endosomal trafficking, in both the presence and absence of its cellular glycan receptor. We visualized, for the first time, that acidification induces the externalization of the VP3 and possibly VP2 N termini, presumably in prelude to the externalization of VP1u at pH 4.0, which is essential for lysosomal membrane disruption. In addition, the structural study of AAV9-galactose interactions demonstrates that AAV9 remains attached to its glycan receptor at the late endosome pH 5.5. This interaction significantly alters the conformational stability of the variable region I of the VPs, as well as the dynamics associated with VP N terminus externalization. There are 13 distinct Adeno-associated virus (AAV) serotypes that are structurally homologous and whose capsid proteins (VP1 to -3) are similar in amino acid sequence. However, AAV9 is one of the most commonly studied and is used as a gene therapy vector. This is partly because AAV9 is capable of crossing the blood-brain barrier and readily transduces a wide array of tissues, including the central nervous system. In this study, we provide AAV9 capsid structural insight during intracellular trafficking. Although the AAV capsid has been shown to externalize the N termini of its VPs, to enzymatically disrupt the lysosome membrane at low pH, there was no structural evidence to confirm this. By utilizing AAV9 as our model, we provide the first structural evidence that the externalization process occurs at the protein interface at the icosahedral 5-fold symmetry axis and can be triggered by lowering the pH. | ||||||||||||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_23993.map.gz | 100.4 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-23993-v30.xml emd-23993.xml | 13.9 KB 13.9 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_23993.png | 141 KB | ||
Filedesc metadata | emd-23993.cif.gz | 6 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-23993 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-23993 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_23993_validation.pdf.gz | 480 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_23993_full_validation.pdf.gz | 479.6 KB | 表示 | |
XML形式データ | emd_23993_validation.xml.gz | 7.8 KB | 表示 | |
CIF形式データ | emd_23993_validation.cif.gz | 8.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23993 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23993 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_23993.map.gz / 形式: CCP4 / 大きさ: 327.2 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | AAV9 capsid structure at pH 5.5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.087 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Adeno-associated virus 9
全体 | 名称: Adeno-associated virus 9 (アデノ随伴ウイルス) |
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要素 |
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-超分子 #1: Adeno-associated virus 9
超分子 | 名称: Adeno-associated virus 9 / タイプ: virus / ID: 1 / 親要素: 0 / 含まれる分子: all / NCBI-ID: 235455 / 生物種: Adeno-associated virus 9 / ウイルスタイプ: VIRUS-LIKE PARTICLE / ウイルス・単離状態: SEROTYPE / ウイルス・エンベロープ: No / ウイルス・中空状態: Yes |
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宿主 | 生物種: Homo sapiens (ヒト) |
ウイルス殻 | Shell ID: 1 / 名称: AAV9 virus like particle / 直径: 240.0 Å / T番号(三角分割数): 1 |
-分子 #1: Capsid protein VP1
分子 | 名称: Capsid protein VP1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 60 / 光学異性体: LEVO |
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由来(天然) | 生物種: Adeno-associated virus 9 (アデノ随伴ウイルス) |
分子量 | 理論値: 58.474414 KDa |
組換発現 | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) |
配列 | 文字列: DGVGSSSGNW HCDSQWLGDR VITTSTRTWA LPTYNNHLYK QISNSTSGGS SNDNAYFGYS TPWGYFDFNR FHCHFSPRDW QRLINNNWG FRPKRLNFKL FNIQVKEVTD NNGVKTIANN LTSTVQVFTD SDYQLPYVLG SAHEGCLPPF PADVFMIPQY G YLTLNDGS ...文字列: DGVGSSSGNW HCDSQWLGDR VITTSTRTWA LPTYNNHLYK QISNSTSGGS SNDNAYFGYS TPWGYFDFNR FHCHFSPRDW QRLINNNWG FRPKRLNFKL FNIQVKEVTD NNGVKTIANN LTSTVQVFTD SDYQLPYVLG SAHEGCLPPF PADVFMIPQY G YLTLNDGS QAVGRSSFYC LEYFPSQMLR TGNNFQFSYE FENVPFHSSY AHSQSLDRLM NPLIDQYLYY LSKTINGSGQ NQ QTLKFSV AGPSNMAVQG RNYIPGPSYR QQRVSTTVTQ NNNSEFAWPG ASSWALNGRN SLMNPGPAMA SHKEGEDRFF PLS GSLIFG KQGTGRDNVD ADKVMITNEE EIKTTNPVAT ESYGQVATNH QSAQAQAQTG WVQNQGILPG MVWQDRDVYL QGPI WAKIP HTDGNFHPSP LMGGFGMKHP PPQILIKNTP VPADPPTAFN KDKLNSFITQ YSTGQVSVEI EWELQKENSK RWNPE IQYT SNYYKSNNVE FAVNTEGVYS EPRPIGTRYL TRNL UniProtKB: Capsid protein VP1 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
緩衝液 | pH: 5.5 詳細: 1x Universal buffer of 20 mM HEPES, 20 mM MES, 20 mM sodium acetate, 0.15 M NaCl, 3.7 mM CaCl2 |
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グリッド | モデル: Quantifoil / 材質: COPPER / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY / 前処理 - タイプ: GLOW DISCHARGE |
凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 60.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: OTHER |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: OTHER / Cs: 2.7 mm |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |