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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: 6zlz | ||||||||||||
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タイトル | Crystal Structure of Merkel Cell Polyomavirus Virus-like Particle | ||||||||||||
![]() | Capsid protein VP1 | ||||||||||||
![]() | VIRUS LIKE PARTICLE / polyomavirus / capsid / Merkel cell carcinoma / jelly roll fold | ||||||||||||
機能・相同性 | ![]() T=7 icosahedral viral capsid / endocytosis involved in viral entry into host cell / virion attachment to host cell / host cell nucleus / structural molecule activity / metal ion binding 類似検索 - 分子機能 | ||||||||||||
生物種 | ![]() | ||||||||||||
手法 | ![]() ![]() ![]() | ||||||||||||
![]() | Bayer, N.J. / Stehle, T. / Blaum, B.S. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of Merkel Cell Polyomavirus Capsid and Interaction with Its Glycosaminoglycan Attachment Receptor. 著者: Niklas J Bayer / Dovile Januliene / Georg Zocher / Thilo Stehle / Arne Moeller / Bärbel S Blaum / ![]() ![]() 要旨: Merkel cell polyomavirus (MCPyV) is a human double-stranded DNA tumor virus. MCPyV cell entry is unique among members of the polyomavirus family as it requires the engagement of two types of glycans, ...Merkel cell polyomavirus (MCPyV) is a human double-stranded DNA tumor virus. MCPyV cell entry is unique among members of the polyomavirus family as it requires the engagement of two types of glycans, sialylated oligosaccharides and sulfated glycosaminoglycans (GAGs). Here, we present crystallographic and cryo-electron microscopic structures of the icosahedral MCPyV capsid and analysis of its glycan interactions via nuclear magnetic resonance (NMR) spectroscopy. While sialic acid binding is specific for α2-3-linked sialic acid and mediated by the exposed apical loops of the major capsid protein VP1, a broad range of GAG oligosaccharides bind to recessed regions between VP1 capsomers. Individual VP1 capsomers are tethered to one another by an extensive disulfide network that differs in architecture from previously described interactions for other PyVs. An unusual C-terminal extension in MCPyV VP1 projects from the recessed capsid regions. Mutagenesis experiments show that this extension is dispensable for receptor interactions. The MCPyV genome was found to be clonally integrated in 80% of cases of Merkel cell carcinoma (MCC), a rare but aggressive form of human skin cancer, strongly suggesting that this virus is tumorigenic. In the metastasizing state, the course of the disease is often fatal, especially in immunocompromised individuals, as reflected by the high mortality rate of 33 to 46% and the low 5-year survival rate (<45%). The high seroprevalence of about 60% makes MCPyV a serious health care burden and illustrates the need for targeted treatments. In this study, we present the first high-resolution structural data for this human tumor virus and demonstrate that the full capsid is required for the essential interaction with its GAG receptor(s). Together, these data can be used as a basis for future strategies in drug development. | ||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 377.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 312.1 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 | ![]() | 1.9 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.9 MB | 表示 | |
XML形式データ | ![]() | 72.2 KB | 表示 | |
CIF形式データ | ![]() | 98.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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単位格子 |
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非結晶学的対称性 (NCS) | NCS oper:
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要素
#1: タンパク質 | 分子量: 46611.031 Da / 分子数: 6 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: VP1 / プラスミド: pwM / 細胞株 (発現宿主): HEK293TT / 器官 (発現宿主): Kidney / 発現宿主: ![]() #2: 化合物 | ChemComp-CA / 研究の焦点であるリガンドがあるか | Y | Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 4.6 詳細: 0.1 M sodium citrate, 0.2 M sodium chloride, 30% MPD |
-データ収集
回折 | 平均測定温度: 100 K / Serial crystal experiment: N |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: DECTRIS PILATUS 6M / 検出器: PIXEL / 日付: 2016年5月25日 |
放射 | モノクロメーター: M / プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 0.976 Å / 相対比: 1 |
反射 | 解像度: 3.52→50 Å / Num. obs: 1088665 / % possible obs: 99.8 % / 冗長度: 13.5 % / Biso Wilson estimate: 97.6 Å2 / CC1/2: 0.996 / Rrim(I) all: 0.309 / Net I/σ(I): 9.15 |
反射 シェル | 解像度: 3.52→3.6 Å / 冗長度: 12.6 % / Mean I/σ(I) obs: 1.06 / Num. unique obs: 78618 / CC1/2: 0.332 / Rrim(I) all: 2.883 / % possible all: 98.3 |
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]() 開始モデル: 1sva 解像度: 3.52→49.97 Å / 交差検証法: NONE 詳細: NCS-constraint refinement procedure with NCS map averaging
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原子変位パラメータ | Biso max: 190.55 Å2 / Biso mean: 122.6 Å2 / Biso min: 88.69 Å2 | ||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 3.52→49.97 Å
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