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基本情報
登録情報 | データベース: PDB / ID: 8yt8 | ||||||
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タイトル | Cryo-EM structure of the dystrophin glycoprotein complex | ||||||
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![]() | STRUCTURAL PROTEIN / complex membrane stability signaling | ||||||
機能・相同性 | ![]() dystrobrevin complex / olfactory nerve structural organization / sarcoglycan complex / O-linked glycosylation / establishment of blood-nerve barrier / striated muscle cell development / establishment of glial blood-brain barrier / dystroglycan complex / nerve maturation / retrograde trans-synaptic signaling by trans-synaptic protein complex ...dystrobrevin complex / olfactory nerve structural organization / sarcoglycan complex / O-linked glycosylation / establishment of blood-nerve barrier / striated muscle cell development / establishment of glial blood-brain barrier / dystroglycan complex / nerve maturation / retrograde trans-synaptic signaling by trans-synaptic protein complex / walking behavior / connective tissue development / positive regulation of basement membrane assembly involved in embryonic body morphogenesis / regulation of cellular response to growth factor stimulus / Regulation of expression of SLITs and ROBOs / regulation of skeletal muscle contraction / contractile ring / regulation of gastrulation / cardiac muscle cell action potential / calcium-dependent cell-matrix adhesion / reactive oxygen species biosynthetic process / morphogenesis of an epithelial sheet / glucose import in response to insulin stimulus / nucleus localization / coronary vasculature morphogenesis / dystrophin-associated glycoprotein complex / microtubule anchoring / vascular associated smooth muscle cell development / laminin-1 binding / response to denervation involved in regulation of muscle adaptation / matrix side of mitochondrial inner membrane / Formation of the dystrophin-glycoprotein complex (DGC) / neurofilament / cell-substrate junction / myotube cell development / Striated Muscle Contraction / postsynaptic specialization / positive regulation of myelination / basement membrane organization / photoreceptor ribbon synapse / dystroglycan binding / regulation of skeletal muscle contraction by regulation of release of sequestered calcium ion / heart process / regulation of sodium ion transmembrane transport / lamin binding / cellular response to cholesterol / regulation of epithelial to mesenchymal transition / vinculin binding / myelination in peripheral nervous system / branching involved in salivary gland morphogenesis / skeletal muscle tissue regeneration / costamere / astrocyte projection / commissural neuron axon guidance / regulation of calcium ion transmembrane transport / membrane organization / protein-containing complex localization / muscle cell development / neuron projection terminus / node of Ranvier / cardiac muscle cell contraction / angiogenesis involved in wound healing / limb development / synaptic transmission, cholinergic / cardiac muscle cell development / axon regeneration / structural constituent of muscle / positive regulation of cell-matrix adhesion / muscle cell cellular homeostasis / nitric-oxide synthase binding / regulation of neurotransmitter receptor localization to postsynaptic specialization membrane / muscle organ development / response to muscle activity / regulation of synapse organization / epithelial tube branching involved in lung morphogenesis / alpha-actinin binding / : / membrane protein ectodomain proteolysis / basement membrane / positive regulation of oligodendrocyte differentiation / postsynaptic cytosol / plasma membrane raft / negative regulation of neuron differentiation / negative regulation of MAPK cascade / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Schwann cell development / striated muscle contraction / heart morphogenesis / response to glucose / calcium ion homeostasis / skeletal muscle tissue development / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / cardiac muscle contraction / laminin binding / response to muscle stretch / positive regulation of neuron differentiation / tubulin binding / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / SH2 domain binding / nuclear periphery 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 / 解像度: 3.5 Å | ||||||
![]() | Wu, J.P. / Yan, Z. / Wan, L. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure and assembly of the dystrophin glycoprotein complex. 著者: Li Wan / Xiaofei Ge / Qikui Xu / Gaoxingyu Huang / Tiandi Yang / Kevin P Campbell / Zhen Yan / Jianping Wu / ![]() ![]() 要旨: The dystrophin glycoprotein complex (DGC) has a crucial role in maintaining cell membrane stability and integrity by connecting the intracellular cytoskeleton with the surrounding extracellular ...The dystrophin glycoprotein complex (DGC) has a crucial role in maintaining cell membrane stability and integrity by connecting the intracellular cytoskeleton with the surrounding extracellular matrix. Dysfunction of dystrophin and its associated proteins results in muscular dystrophy, a disorder characterized by progressive muscle weakness and degeneration. Despite the important roles of the DGC in physiology and pathology, its structural details remain largely unknown, hindering a comprehensive understanding of its assembly and function. Here we isolated the native DGC from mouse skeletal muscle and obtained its high-resolution structure. Our findings unveil a markedly divergent structure from the previous model of DGC assembly. Specifically, on the extracellular side, β-, γ- and δ-sarcoglycans co-fold to form a specialized, extracellular tower-like structure, which has a central role in complex assembly by providing binding sites for α-sarcoglycan and dystroglycan. In the transmembrane region, sarcoglycans and sarcospan flank and stabilize the single transmembrane helix of dystroglycan, rather than forming a subcomplex as previously proposed. On the intracellular side, sarcoglycans and dystroglycan engage in assembly with the dystrophin-dystrobrevin subcomplex through extensive interaction with the ZZ domain of dystrophin. Collectively, these findings enhance our understanding of the structural linkage across the cell membrane and provide a foundation for the molecular interpretation of many muscular dystrophy-related mutations. | ||||||
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構造ビューア | 分子: ![]() ![]() |
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-関連構造データ
関連構造データ | ![]() 39568MC 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
-タンパク質 , 8種, 8分子 ABCDEGOS
#1: タンパク質 | 分子量: 32539.186 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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#2: タンパク質 | 分子量: 28729.967 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#3: タンパク質 | 分子量: 23363.234 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#4: タンパク質 | 分子量: 29191.100 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#5: タンパク質 | 分子量: 38371.391 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#6: タンパク質 | 分子量: 28956.158 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#8: タンパク質 | 分子量: 31934.459 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#9: タンパク質 | 分子量: 19917.953 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
-タンパク質・ペプチド , 1種, 1分子 I
#7: タンパク質・ペプチド | 分子量: 559.741 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: unassigned / 由来: (天然) ![]() ![]() |
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-糖 , 5種, 12分子 
#10: 多糖 | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #11: 多糖 | beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose | タイプ: oligosaccharide / 分子量: 586.542 Da / 分子数: 1 / 由来タイプ: 組換発現 #12: 多糖 | #13: 多糖 | beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #14: 糖 | |
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-非ポリマー , 4種, 6分子 






#15: 化合物 | #16: 化合物 | ChemComp-ZN / | #17: 化合物 | ChemComp-P5S / | #18: 化合物 | ChemComp-CA / | |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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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: dystrophin glycoprotein complex, DGC / タイプ: COMPLEX / Entity ID: #1-#9 / 由来: NATURAL |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.4 / 詳細: 25 mM MOPS-Na, 150 mM NaCl, 2 mM CaCl2, 0.01% GDN |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: NO |
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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 / 最大 デフォーカス(公称値): 1900 nm / 最小 デフォーカス(公称値): 1400 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
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3次元再構成 | 解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 499658 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT | ||||||||||||||||||||||||
拘束条件 |
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