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基本情報
登録情報 | データベース: PDB / ID: 6owt | ||||||||||||||||||||||||||||||||||||||||||
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タイトル | Structure of SIVsmm Nef and SMM tetherin bound to the clathrin adaptor AP-2 complex | ||||||||||||||||||||||||||||||||||||||||||
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![]() | PROTEIN TRANSPORT / AP / HIV / Nef / trafficking / viral restriction factor | ||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() AP-type membrane coat adaptor complex / Formation of annular gap junctions / Gap junction degradation / LDL clearance / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / WNT5A-dependent internalization of FZD4 / clathrin coat / postsynaptic endocytic zone / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / LDL clearance ...AP-type membrane coat adaptor complex / Formation of annular gap junctions / Gap junction degradation / LDL clearance / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / WNT5A-dependent internalization of FZD4 / clathrin coat / postsynaptic endocytic zone / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / LDL clearance / Retrograde neurotrophin signalling / Trafficking of GluR2-containing AMPA receptors / VLDLR internalisation and degradation / Retrograde neurotrophin signalling / WNT5A-dependent internalization of FZD4 / VLDLR internalisation and degradation / extrinsic component of presynaptic endocytic zone membrane / clathrin adaptor complex / cardiac septum development / metalloendopeptidase inhibitor activity / Recycling pathway of L1 / MHC class II antigen presentation / AP-2 adaptor complex / regulation of vesicle size / postsynaptic neurotransmitter receptor internalization / clathrin coat assembly / Cargo recognition for clathrin-mediated endocytosis / Recycling pathway of L1 / Clathrin-mediated endocytosis / positive regulation of synaptic vesicle endocytosis / Cargo recognition for clathrin-mediated endocytosis / clathrin adaptor activity / Clathrin-mediated endocytosis / membrane coat / vesicle budding from membrane / positive regulation of protein localization to membrane / clathrin-dependent endocytosis / MHC class II antigen presentation / signal sequence binding / coronary vasculature development / aorta development / ventricular septum development / Neutrophil degranulation / clathrin binding / low-density lipoprotein particle receptor binding / Trafficking of GluR2-containing AMPA receptors / positive regulation of endocytosis / positive regulation of receptor internalization / synaptic vesicle endocytosis / negative regulation of protein localization to plasma membrane / vesicle-mediated transport / protein serine/threonine kinase binding / phosphatidylinositol binding / secretory granule / kidney development / intracellular protein transport / cytoplasmic side of plasma membrane / kinase binding / disordered domain specific binding / synaptic vesicle / heart development / protein-containing complex assembly / cytoplasmic vesicle / defense response to virus / transmembrane transporter binding / postsynapse / protein domain specific binding / innate immune response / intracellular membrane-bounded organelle / synapse / lipid binding / protein-containing complex binding / protein kinase binding / GTP binding / host cell plasma membrane / glutamatergic synapse / cell surface / Golgi apparatus / mitochondrion / membrane / plasma 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: 3.8 Å | ||||||||||||||||||||||||||||||||||||||||||
![]() | Buffalo, C.Z. / Ren, X. / Hurley, J.H. | ||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural Basis for Tetherin Antagonism as a Barrier to Zoonotic Lentiviral Transmission. 著者: Cosmo Z Buffalo / Christina M Stürzel / Elena Heusinger / Dorota Kmiec / Frank Kirchhoff / James H Hurley / Xuefeng Ren / ![]() ![]() 要旨: Tetherin is a host defense factor that physically prevents virion release from the plasma membrane. The Nef accessory protein of simian immunodeficiency virus (SIV) engages the clathrin adaptor AP-2 ...Tetherin is a host defense factor that physically prevents virion release from the plasma membrane. The Nef accessory protein of simian immunodeficiency virus (SIV) engages the clathrin adaptor AP-2 to downregulate tetherin via its DIWK motif. As human tetherin lacks DIWK, antagonism of tetherin by Nef is a barrier to simian-human transmission of non-human primate lentiviruses. To determine the molecular basis for tetherin counteraction, we reconstituted the AP-2 complex with a simian tetherin and SIV Nef and determined its structure by cryoelectron microscopy (cryo-EM). Nef refolds the first α-helix of the β2 subunit of AP-2 to a β hairpin, creating a binding site for the DIWK sequence. The tetherin binding site in Nef is distinct from those of most other Nef substrates, including MHC class I, CD3, and CD4 but overlaps with the site for the restriction factor SERINC5. This structure explains the dependence of SIVs on tetherin DIWK and consequent barrier to human transmission. | ||||||||||||||||||||||||||||||||||||||||||
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 292.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 218.7 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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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: 104286.391 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() | ||||
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#2: タンパク質 | 分子量: 66953.195 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() | ||||
#3: タンパク質 | 分子量: 16161.563 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() | ||||
#4: タンパク質 | 分子量: 31772.352 Da / 分子数: 2 / Mutation: C55A / 由来タイプ: 組換発現 詳細: protein chimera of the cytoplasmic tail of sooty mangabey (smm) linked to the N-terminus of SIV smm tetherin 由来: (組換発現) ![]() ![]() 遺伝子: BST2, nef / 発現宿主: ![]() ![]() #5: タンパク質 | | 分子量: 17011.662 Da / 分子数: 1 / Mutation: N97C, C99S / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() Has protein modification | Y | |
-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 | 名称: Structure of SIVsmm Nef and SMM tetherin bound to the clathrin adaptor AP-2 complex タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 0.2036 MDa / 実験値: YES |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 8 |
試料 | 濃度: 0.7 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: 25mA / グリッドのタイプ: C-flat-2/1 |
急速凍結 | 凍結剤: ETHANE |
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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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / アライメント法: COMA FREE |
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: 50.16 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.15_3459: / 分類: 精密化 | ||||||||||||||||||||||||
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EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 159406 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 |
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拘束条件 |
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