+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6nf9 | ||||||||||||
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タイトル | Structure of M. spretus Endogenous Virus Element (EVE) Virus-like particle (VLP) | ||||||||||||
要素 | Mus Spretus Endogenous Viral Element | ||||||||||||
キーワード | VIRUS LIKE PARTICLE (ウイルス様粒子) / Mus spretus / VLP / EVE | ||||||||||||
機能・相同性 | Empty Capsid Viral Protein 2 / Parvovirus coat protein VP1/VP2 / Beta Complex / Mainly Beta 機能・相同性情報 | ||||||||||||
生物種 | Mus spretus (アルジェリアハツカネズミ) | ||||||||||||
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: 3.89 Å | ||||||||||||
データ登録者 | Callaway, H.M. / Subramanian, S. | ||||||||||||
資金援助 | 米国, 英国, 3件
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引用 | ジャーナル: J Virol / 年: 2019 タイトル: Examination and Reconstruction of Three Ancient Endogenous Parvovirus Capsid Protein Gene Remnants Found in Rodent Genomes. 著者: Heather M Callaway / Suriyasri Subramanian / Christian A Urbina / Karen N Barnard / Robert A Dick / Carol M Bator / Susan L Hafenstein / Robert J Gifford / Colin R Parrish / 要旨: Parvovirus-derived endogenous viral elements (EVEs) have been found in the genomes of many different animal species, resulting from integration events that may have occurred from more than 50 million ...Parvovirus-derived endogenous viral elements (EVEs) have been found in the genomes of many different animal species, resulting from integration events that may have occurred from more than 50 million years ago to much more recently. Here, we further investigate the properties of autonomous parvovirus EVEs and describe their relationships to contemporary viruses. While we did not find any intact capsid protein open reading frames in the integrated viral sequences, we examined three EVEs that were repaired to form full-length sequences with relatively few changes. These sequences were found in the genomes of (brown rat), (Algerian mouse), and (wood mouse). The sequence was not present in the genomes of the closely related species , , , and , indicating that it was less than 2 million years old, and the and sequences were not found in the published genomes of other mouse species, also indicating relatively recent insertions. The VP2 sequence assembled into capsids, which had high thermal stability, bound the sialic acid -acetylneuraminic acid, and entered murine L cells. The 3.89-Å structure of the virus-like particles (VLPs), determined using cryo-electron microscopy, showed similarities to rodent and porcine parvovirus capsids. The repaired VP2 sequences from and did not assemble as first prepared, but chimeras combining capsid surface loops from with canine parvovirus assembled, allowing some of that capsid's structures and functions to be examined. Parvovirus endogenous viral elements (EVEs) that have been incorporated into the genomes of different animals represent remnants of the DNA sequences of ancient viruses that infected the ancestors of those animals millions of years ago, but we know little about their properties or how they differ from currently circulating parvoviruses. By expressing the capsid proteins of different parvovirus EVEs that were found integrated into the genomes of three different rodents, we can examine their structures and functions. A VP2 (major capsid protein) EVE sequence from a mouse genome assembled into capsids that had a similar structure and biophysical properties to extant parvoviruses and also bound sialic acids and entered rodent cells. Chimeras formed from combinations of canine parvovirus and portions of the parvovirus sequences from the brown rat genome allowed us to examine the structures and functions of the surface loops of that EVE capsid. | ||||||||||||
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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6nf9.cif.gz | 107 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6nf9.ent.gz | 81.4 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6nf9.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/nf/6nf9 ftp://data.pdbj.org/pub/pdb/validation_reports/nf/6nf9 | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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対称性 | 点対称性: (シェーンフリース記号: I (正20面体型対称)) |
-要素
#1: タンパク質 | 分子量: 63760.590 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) Mus spretus (アルジェリアハツカネズミ) 発現宿主: Trichoplusia ni (イラクサキンウワバ) |
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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 |
-試料調製
構成要素 | 名称: Parvoviridaeパルボウイルス / タイプ: VIRUS / Entity ID: all / 由来: RECOMBINANT | |||||||||||||||||||||||||
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由来(天然) | 生物種: Parvoviridae (パルボウイルス) / 株: Mus spretus endogenous viral element | |||||||||||||||||||||||||
由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) | |||||||||||||||||||||||||
ウイルスについての詳細 | 中空か: YES / エンベロープを持つか: NO / 単離: OTHER / タイプ: VIRUS-LIKE PARTICLE | |||||||||||||||||||||||||
天然宿主 | 生物種: Mus spretus | |||||||||||||||||||||||||
ウイルス殻 | 直径: 250 nm / 三角数 (T数): 1 | |||||||||||||||||||||||||
緩衝液 | pH: 7.4 / 詳細: Phosphate buffered saline pH 7.4 | |||||||||||||||||||||||||
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 | |||||||||||||||||||||||||
試料支持 | 詳細: unspecified | |||||||||||||||||||||||||
急速凍結 | 凍結剤: ETHANE |
-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: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: DARK FIELD |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 45 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 実像数: 2082 |
画像スキャン | 横: 4096 / 縦: 4096 |
-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: 47 | |||||||||||||||||||||||||
対称性 | 点対称性: I (正20面体型対称) | |||||||||||||||||||||||||
3次元再構成 | 解像度: 3.89 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 6342 / クラス平均像の数: 1 / 対称性のタイプ: POINT |