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基本情報
登録情報 | データベース: PDB / ID: 7upi | ||||||
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タイトル | Cryo-EM structure of SHOC2-PP1c-MRAS holophosphatase complex | ||||||
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![]() | CELL CYCLE / shoc2 / leucine-rich repeat / MRAs / protein phosphatase / RAS signaling / MAPK | ||||||
機能・相同性 | ![]() cellular response to growth hormone stimulus / regulation of glycogen catabolic process / positive regulation of termination of RNA polymerase II transcription, poly(A)-coupled / negative regulation of neural precursor cell proliferation / PTW/PP1 phosphatase complex / protein phosphatase type 1 complex / volume-sensitive anion channel activity / glycogen granule / RNA polymerase II promoter clearance / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity ...cellular response to growth hormone stimulus / regulation of glycogen catabolic process / positive regulation of termination of RNA polymerase II transcription, poly(A)-coupled / negative regulation of neural precursor cell proliferation / PTW/PP1 phosphatase complex / protein phosphatase type 1 complex / volume-sensitive anion channel activity / glycogen granule / RNA polymerase II promoter clearance / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity / nerve growth factor signaling pathway / cyclic-GMP-AMP transmembrane import across plasma membrane / protein phosphatase 1 binding / cadherin binding involved in cell-cell adhesion / regulation of translational initiation in response to stress / protein phosphatase regulator activity / GTP-dependent protein binding / SHOC2 M1731 mutant abolishes MRAS complex function / Gain-of-function MRAS complexes activate RAF signaling / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of Ras protein signal transduction / dephosphorylation / regulation of canonical Wnt signaling pathway / glycogen metabolic process / negative regulation of neuron differentiation / protein-serine/threonine phosphatase / branching morphogenesis of an epithelial tube / Triglyceride catabolism / entrainment of circadian clock by photoperiod / Maturation of hRSV A proteins / phosphatase activity / protein serine/threonine phosphatase activity / telomere maintenance in response to DNA damage / regulation of MAPK cascade / phosphoprotein phosphatase activity / negative regulation of transcription elongation by RNA polymerase II / transition metal ion binding / DARPP-32 events / fibroblast growth factor receptor signaling pathway / positive regulation of glycogen biosynthetic process / ribonucleoprotein complex binding / protein dephosphorylation / Downregulation of TGF-beta receptor signaling / positive regulation of neuron differentiation / lung development / cellular response to leukemia inhibitory factor / small monomeric GTPase / adherens junction / circadian regulation of gene expression / positive regulation of transcription elongation by RNA polymerase II / RAF activation / regulation of circadian rhythm / positive regulation of neuron projection development / response to lead ion / : / GDP binding / presynapse / G protein activity / actin cytoskeleton organization / protein phosphatase binding / perikaryon / dendritic spine / Ras protein signal transduction / protein stabilization / intracellular signal transduction / iron ion binding / cell division / GTPase activity / GTP binding / nucleolus / glutamatergic synapse / extracellular exosome / nucleoplasm / nucleus / plasma membrane / cytosol / cytoplasm 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: 2.89 Å | ||||||
![]() | Fuller, J.R. / Hajian, B. / Lemke, C. / Kwon, J. / Bian, Y. / Aguirre, A. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure-function analysis of the SHOC2-MRAS-PP1C holophosphatase complex. 著者: Jason J Kwon / Behnoush Hajian / Yuemin Bian / Lucy C Young / Alvaro J Amor / James R Fuller / Cara V Fraley / Abbey M Sykes / Jonathan So / Joshua Pan / Laura Baker / Sun Joo Lee / Douglas B ...著者: Jason J Kwon / Behnoush Hajian / Yuemin Bian / Lucy C Young / Alvaro J Amor / James R Fuller / Cara V Fraley / Abbey M Sykes / Jonathan So / Joshua Pan / Laura Baker / Sun Joo Lee / Douglas B Wheeler / David L Mayhew / Nicole S Persky / Xiaoping Yang / David E Root / Anthony M Barsotti / Andrew W Stamford / Charles K Perry / Alex Burgin / Frank McCormick / Christopher T Lemke / William C Hahn / Andrew J Aguirre / ![]() 要旨: Receptor tyrosine kinase (RTK)-RAS signalling through the downstream mitogen-activated protein kinase (MAPK) cascade regulates cell proliferation and survival. The SHOC2-MRAS-PP1C holophosphatase ...Receptor tyrosine kinase (RTK)-RAS signalling through the downstream mitogen-activated protein kinase (MAPK) cascade regulates cell proliferation and survival. The SHOC2-MRAS-PP1C holophosphatase complex functions as a key regulator of RTK-RAS signalling by removing an inhibitory phosphorylation event on the RAF family of proteins to potentiate MAPK signalling. SHOC2 forms a ternary complex with MRAS and PP1C, and human germline gain-of-function mutations in this complex result in congenital RASopathy syndromes. However, the structure and assembly of this complex are poorly understood. Here we use cryo-electron microscopy to resolve the structure of the SHOC2-MRAS-PP1C complex. We define the biophysical principles of holoenzyme interactions, elucidate the assembly order of the complex, and systematically interrogate the functional consequence of nearly all of the possible missense variants of SHOC2 through deep mutational scanning. We show that SHOC2 binds PP1C and MRAS through the concave surface of the leucine-rich repeat region and further engages PP1C through the N-terminal disordered region that contains a cryptic RVXF motif. Complex formation is initially mediated by interactions between SHOC2 and PP1C and is stabilized by the binding of GTP-loaded MRAS. These observations explain how mutant versions of SHOC2 in RASopathies and cancer stabilize the interactions of complex members to enhance holophosphatase activity. Together, this integrative structure-function model comprehensively defines key binding interactions within the SHOC2-MRAS-PP1C holophosphatase complex and will inform therapeutic development . | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 225.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 159.2 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
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-関連構造データ
関連構造データ | ![]() 26667MC ![]() 7t7aC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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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
-タンパク質 , 3種, 3分子 ABC
#1: タンパク質 | 分子量: 20894.898 Da / 分子数: 1 / 変異: Q71L / 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: 37615.102 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 参照: UniProt: P62136, protein-serine/threonine phosphatase |
#3: タンパク質 | 分子量: 65029.926 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: Q9UQ13 |
-非ポリマー , 4種, 5分子 






#4: 化合物 | ChemComp-GTP / | ||
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#5: 化合物 | ChemComp-MG / | ||
#6: 化合物 | #7: 化合物 | ChemComp-CL / | |
-詳細
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: SHOC2-PP1C-MRAS holophosphatase / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: MULTIPLE SOURCES | |||||||||||||||||||||||||
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由来(天然) | 生物種: ![]() | |||||||||||||||||||||||||
由来(組換発現) |
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緩衝液 | pH: 7.4 詳細: Fluorinated octyl maltoside added immediately prior to vitrification | |||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 2.75 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: Gatan Solarus using ambient air with power set to 20 watts グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 291 K |
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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 / 倍率(公称値): 81000 X / 最大 デフォーカス(公称値): 2300 nm / 最小 デフォーカス(公称値): 500 nm / Calibrated defocus min: 290 nm / 最大 デフォーカス(補正後): 2840 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: ZEMLIN TABLEAU |
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: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 / 実像数: 4721 詳細: Movies were recorded in CDS + super-resolution mode, fractionating 60 e-/A2 over 52 movie frames |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
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解析
ソフトウェア |
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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: 2.89 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 449384 / アルゴリズム: FOURIER SPACE / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / PDB chain-ID: A / Source name: PDB / タイプ: experimental model
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精密化 | 交差検証法: NONE |