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基本情報
登録情報 | データベース: PDB / ID: 7r04 | ||||||
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タイトル | Neurofibromin in open conformation | ||||||
![]() | Isoform I of Neurofibromin | ||||||
![]() | SIGNALING PROTEIN / Signalling protein / Homodimer / Neurofibromatosis / GAP | ||||||
機能・相同性 | ![]() positive regulation of mast cell apoptotic process / negative regulation of Rac protein signal transduction / regulation of glial cell differentiation / observational learning / negative regulation of Schwann cell migration / Schwann cell migration / amygdala development / vascular associated smooth muscle cell migration / Schwann cell proliferation / negative regulation of mast cell proliferation ...positive regulation of mast cell apoptotic process / negative regulation of Rac protein signal transduction / regulation of glial cell differentiation / observational learning / negative regulation of Schwann cell migration / Schwann cell migration / amygdala development / vascular associated smooth muscle cell migration / Schwann cell proliferation / negative regulation of mast cell proliferation / mast cell apoptotic process / gamma-aminobutyric acid secretion, neurotransmission / vascular associated smooth muscle cell proliferation / glutamate secretion, neurotransmission / negative regulation of Schwann cell proliferation / mast cell proliferation / negative regulation of leukocyte migration / negative regulation of neurotransmitter secretion / forebrain morphogenesis / regulation of cell-matrix adhesion / hair follicle maturation / regulation of blood vessel endothelial cell migration / cell communication / camera-type eye morphogenesis / smooth muscle tissue development / negative regulation of oligodendrocyte differentiation / sympathetic nervous system development / myeloid leukocyte migration / peripheral nervous system development / myelination in peripheral nervous system / phosphatidylcholine binding / negative regulation of Ras protein signal transduction / metanephros development / phosphatidylethanolamine binding / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / collagen fibril organization / regulation of long-term synaptic potentiation / endothelial cell proliferation / regulation of postsynapse organization / regulation of bone resorption / neural tube development / artery morphogenesis / forebrain astrocyte development / adrenal gland development / negative regulation of neuroblast proliferation / regulation of synaptic transmission, GABAergic / negative regulation of protein import into nucleus / pigmentation / spinal cord development / negative regulation of astrocyte differentiation / negative regulation of vascular associated smooth muscle cell migration / negative regulation of endothelial cell proliferation / Rac protein signal transduction / negative regulation of osteoclast differentiation / oligodendrocyte differentiation / RAS signaling downstream of NF1 loss-of-function variants / extrinsic apoptotic signaling pathway via death domain receptors / positive regulation of GTPase activity / negative regulation of cell-matrix adhesion / neuroblast proliferation / regulation of angiogenesis / regulation of ERK1 and ERK2 cascade / Schwann cell development / negative regulation of fibroblast proliferation / skeletal muscle tissue development / negative regulation of stem cell proliferation / negative regulation of MAPK cascade / positive regulation of vascular associated smooth muscle cell proliferation / positive regulation of endothelial cell proliferation / extrinsic apoptotic signaling pathway in absence of ligand / extracellular matrix organization / GTPase activator activity / osteoclast differentiation / negative regulation of angiogenesis / negative regulation of cell migration / stem cell proliferation / phosphatidylinositol 3-kinase/protein kinase B signal transduction / wound healing / liver development / regulation of long-term neuronal synaptic plasticity / brain development / visual learning / cerebral cortex development / Regulation of RAS by GAPs / cognition / long-term synaptic potentiation / protein import into nucleus / osteoblast differentiation / positive regulation of neuron apoptotic process / MAPK cascade / presynapse / regulation of gene expression / cellular response to heat / heart development / actin cytoskeleton organization / neuron apoptotic process / fibroblast proliferation / angiogenesis / Ras protein signal transduction / response to hypoxia 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: 3.7 Å | ||||||
![]() | Chaker-Margot, M. / Scheffzek, K. / Maier, T. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of activation of the tumor suppressor protein neurofibromin. 著者: Malik Chaker-Margot / Sebastiaan Werten / Theresia Dunzendorfer-Matt / Stefan Lechner / Angela Ruepp / Klaus Scheffzek / Timm Maier / ![]() ![]() 要旨: Mutations in the NF1 gene cause the familial genetic disease neurofibromatosis type I, as well as predisposition to cancer. The NF1 gene product, neurofibromin, is a GTPase-activating protein and ...Mutations in the NF1 gene cause the familial genetic disease neurofibromatosis type I, as well as predisposition to cancer. The NF1 gene product, neurofibromin, is a GTPase-activating protein and acts as a tumor suppressor by negatively regulating the small GTPase, Ras. However, structural insights into neurofibromin activation remain incompletely defined. Here, we provide cryoelectron microscopy (cryo-EM) structures that reveal an extended neurofibromin homodimer in two functional states: an auto-inhibited state with occluded Ras-binding site and an asymmetric open state with an exposed Ras-binding site. Mechanistically, the transition to the active conformation is stimulated by nucleotide binding, which releases a lock that tethers the catalytic domain to an extended helical repeat scaffold in the occluded state. Structure-guided mutational analysis supports functional relevance of allosteric control. Disease-causing mutations are mapped and primarily impact neurofibromin stability. Our findings suggest a role for nucleotides in neurofibromin regulation and may lead to therapeutic modulation of Ras signaling. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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-検証レポート
文書・要旨 | ![]() | 941.1 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 989.5 KB | 表示 | |
XML形式データ | ![]() | 111.1 KB | 表示 | |
CIF形式データ | ![]() | 174.1 KB | 表示 | |
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-関連構造データ
関連構造データ | ![]() 14219MC ![]() 7r03C C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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: 317410.812 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P21359 #2: 化合物 | ChemComp-GSP / | 研究の焦点であるリガンドがあるか | Y | |
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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 | 名称: Homodimer of Neurofibromin / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT | |||||||||||||||||||||||||
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分子量 | 値: 640 kDa/nm / 実験値: YES | |||||||||||||||||||||||||
由来(天然) | 生物種: ![]() | |||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | |||||||||||||||||||||||||
緩衝液 | pH: 7.4 | |||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/1 | |||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE-PROPANE / 湿度: 80 % / 凍結前の試料温度: 298 K |
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電子顕微鏡撮影
顕微鏡 | モデル: FEI TITAN |
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電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / 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 | 平均露光時間: 8 sec. / 電子線照射量: 50 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 2 |
電子光学装置 | エネルギーフィルター名称: GIF 200 |
画像スキャン | 動画フレーム数/画像: 40 / 利用したフレーム数/画像: 1-40 |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19rc4-4035_1692: / 分類: 精密化 | ||||||||||||||||||||||||
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EMソフトウェア |
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 300000 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Source name: PDB / タイプ: experimental model
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精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 222.72 Å2 | ||||||||||||||||||||||||
拘束条件 |
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