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基本情報
登録情報 | データベース: PDB / ID: 7zay | ||||||||||||
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タイトル | Human heparan sulfate polymerase complex EXT1-EXT2 | ||||||||||||
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![]() | TRANSFERASE / Heparan sulfate biosynthesis / Enzyme complex / Glycosyltransferase / Golgi | ||||||||||||
機能・相同性 | ![]() glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase / N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase / hypersensitivity / heart field specification / lymphocyte adhesion to endothelial cell of high endothelial venule / heparan sulfate N-acetylglucosaminyltransferase activity / glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase activity / N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase activity / smoothened signaling pathway involved in lung development / developmental growth involved in morphogenesis ...glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase / N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase / hypersensitivity / heart field specification / lymphocyte adhesion to endothelial cell of high endothelial venule / heparan sulfate N-acetylglucosaminyltransferase activity / glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase activity / N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase activity / smoothened signaling pathway involved in lung development / developmental growth involved in morphogenesis / sweat gland development / perichondral bone morphogenesis / mesenchymal cell differentiation involved in bone development / response to leukemia inhibitory factor / : / UDP-N-acetylglucosamine transferase complex / chondrocyte hypertrophy / embryonic skeletal joint development / hematopoietic stem cell migration to bone marrow / fluid transport / : / limb joint morphogenesis / tight junction organization / glucuronosyltransferase activity / Defective EXT2 causes exostoses 2 / Defective EXT1 causes exostoses 1, TRPS2 and CHDS / heparin proteoglycan biosynthetic process / stomach development / sebaceous gland development / response to heparin / glomerular basement membrane development / glycosaminoglycan biosynthetic process / HS-GAG biosynthesis / lymphocyte migration into lymphoid organs / heparan sulfate proteoglycan biosynthetic process / sulfation / chondrocyte proliferation / dendritic cell migration / endochondral bone morphogenesis / dendrite self-avoidance / glandular epithelial cell differentiation / hematopoietic stem cell homeostasis / endochondral bone growth / acetylglucosaminyltransferase activity / podocyte differentiation / basement membrane organization / sodium ion homeostasis / cartilage development involved in endochondral bone morphogenesis / vocalization behavior / cranial skeletal system development / vacuole organization / olfactory bulb development / leukocyte tethering or rolling / endochondral ossification / polysaccharide biosynthetic process / multicellular organismal-level water homeostasis / endoderm development / fear response / stem cell division / response to light intensity / protein N-linked glycosylation / regulation of tumor necrosis factor-mediated signaling pathway / collagen fibril organization / neural crest cell differentiation / ossification involved in bone maturation / motor behavior / optic nerve development / hair follicle morphogenesis / cell adhesion mediated by integrin / heart contraction / epithelial tube branching involved in lung morphogenesis / protein glycosylation / antigen processing and presentation / glycosyltransferase activity / social behavior / mesoderm development / mesoderm formation / blood vessel remodeling / cellular response to fibroblast growth factor stimulus / catalytic complex / cell fate commitment / fibroblast growth factor receptor signaling pathway / hematopoietic stem cell differentiation / canonical Wnt signaling pathway / chondrocyte differentiation / BMP signaling pathway / bone resorption / gastrulation / ossification / axon guidance / synaptic transmission, glutamatergic / wound healing / protein catabolic process / multicellular organism growth / cellular response to virus / regulation of blood pressure / vasodilation / protein-containing complex assembly / gene expression / protein heterodimerization activity 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: 2.8 Å | ||||||||||||
![]() | Leisico, F. / Omeiri, J. / Hons, M. / Schoehn, G. / Lortat-Jacob, H. / Wild, R. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of the human heparan sulfate polymerase complex EXT1-EXT2. 著者: Francisco Leisico / Juneina Omeiri / Christine Le Narvor / Joël Beaudouin / Michael Hons / Daphna Fenel / Guy Schoehn / Yohann Couté / David Bonnaffé / Rabia Sadir / Hugues Lortat-Jacob / Rebekka Wild / ![]() 要旨: Heparan sulfates are complex polysaccharides that mediate the interaction with a broad range of protein ligands at the cell surface. A key step in heparan sulfate biosynthesis is catalyzed by the bi- ...Heparan sulfates are complex polysaccharides that mediate the interaction with a broad range of protein ligands at the cell surface. A key step in heparan sulfate biosynthesis is catalyzed by the bi-functional glycosyltransferases EXT1 and EXT2, which generate the glycan backbone consisting of repeating N-acetylglucosamine and glucuronic acid units. The molecular mechanism of heparan sulfate chain polymerization remains, however, unknown. Here, we present the cryo-electron microscopy structure of human EXT1-EXT2, which reveals the formation of a tightly packed hetero-dimeric complex harboring four glycosyltransferase domains. A combination of in vitro and in cellulo mutational studies is used to dissect the functional role of the four catalytic sites. While EXT1 can catalyze both glycosyltransferase reactions, our results indicate that EXT2 might only have N-acetylglucosamine transferase activity. Our findings provide mechanistic insight into heparan sulfate chain elongation as a nonprocessive process and lay the foundation for future studies on EXT1-EXT2 function in health and disease. | ||||||||||||
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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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PDBx/mmCIF形式 | ![]() | 252.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 191.8 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 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 50.2 KB | 表示 | |
CIF形式データ | ![]() | 74 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 14582MC 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
#1: タンパク質 | 分子量: 85261.859 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: Q16394, glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase, N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase |
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#2: タンパク質 | 分子量: 79056.836 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: Q93063, glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase, N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase |
#3: 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 |
#4: 糖 | ChemComp-NAG / |
#5: 化合物 | ChemComp-UDP / |
研究の焦点であるリガンドがあるか | Y |
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: Hetero-dimeric complex EXT1-EXT2 / タイプ: COMPLEX 詳細: local resolution-filtered map generated using a B-factor of -30 A2 Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 値: 0.16 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: 7.2 |
試料 | 濃度: 0.4 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Purified EXT1-EXT2 complex at 0.4mg/mL was mixed with 1mM of UDP-GlcNAc, 1mM UDP-GlcA and 1mM MnCl2 and incubated 15 min on ice before applying 4 uL of the sample onto a glow discharged ...詳細: Purified EXT1-EXT2 complex at 0.4mg/mL was mixed with 1mM of UDP-GlcNAc, 1mM UDP-GlcA and 1mM MnCl2 and incubated 15 min on ice before applying 4 uL of the sample onto a glow discharged Quantifoil holey carbon grid (R1.2/1.3, 300 mesh, copper). |
試料支持 | グリッドの材料: COPPER / 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: 277 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 / 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 |
撮影 | 電子線照射量: 46 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
ソフトウェア | 名称: PHENIX / バージョン: 1.20.1_4487: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 286390 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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