+データを開く
-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 | ||||||||||||
要素 |
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キーワード | TRANSFERASE / Heparan sulfate biosynthesis / Enzyme complex / Glycosyltransferase / Golgi | ||||||||||||
機能・相同性 | 機能・相同性情報 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 / chondroitin sulfate metabolic process / response to heparin / chondrocyte hypertrophy / embryonic skeletal joint development / hematopoietic stem cell migration to bone marrow / heparan sulfate proteoglycan biosynthetic process, polysaccharide chain biosynthetic process / fluid transport / glucuronosyltransferase activity / limb joint morphogenesis / tight junction organization / heparin biosynthetic process / Defective EXT2 causes exostoses 2 / Defective EXT1 causes exostoses 1, TRPS2 and CHDS / stomach development / endochondral bone growth / sebaceous gland development / glomerular basement membrane development / heparan sulfate proteoglycan biosynthetic process / HS-GAG biosynthesis / glycosaminoglycan biosynthetic process / dendrite self-avoidance / lymphocyte migration into lymphoid organs / chondrocyte proliferation / sulfation / hematopoietic stem cell homeostasis / dendritic cell migration / endochondral bone morphogenesis / glandular epithelial cell differentiation / acetylglucosaminyltransferase activity / sodium ion homeostasis / podocyte differentiation / basement membrane organization / polysaccharide biosynthetic process / cartilage development involved in endochondral bone morphogenesis / vocalization behavior / fear response / cranial skeletal system development / stem cell division / vacuole organization / olfactory bulb development / multicellular organismal-level water homeostasis / leukocyte tethering or rolling / endochondral ossification / endoderm development / response to light intensity / protein N-linked glycosylation / regulation of tumor necrosis factor-mediated signaling pathway / cellular response to fibroblast growth factor stimulus / collagen fibril organization / neural crest cell differentiation / motor behavior / ossification involved in bone maturation / hair follicle morphogenesis / cell adhesion mediated by integrin / optic nerve development / epithelial tube branching involved in lung morphogenesis / heart contraction / mesoderm development / glycosyltransferase activity / protein glycosylation / antigen processing and presentation / social behavior / mesoderm formation / catalytic complex / blood vessel remodeling / cell fate commitment / fibroblast growth factor receptor signaling pathway / hematopoietic stem cell differentiation / canonical Wnt signaling pathway / BMP signaling pathway / bone resorption / chondrocyte differentiation / gastrulation / ossification / axon guidance / synaptic transmission, glutamatergic / wound healing / protein catabolic process / multicellular organism growth / cellular response to virus / regulation of blood pressure / vasodilation / gene expression / protein-containing complex assembly / protein heterodimerization activity 類似検索 - 分子機能 | ||||||||||||
生物種 | Homo sapiens (ヒト) | ||||||||||||
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 | ||||||||||||
データ登録者 | Leisico, F. / Omeiri, J. / Hons, M. / Schoehn, G. / Lortat-Jacob, H. / Wild, R. | ||||||||||||
資金援助 | フランス, 3件
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引用 | ジャーナル: Nat Commun / 年: 2022 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. | ||||||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7zay.cif.gz | 245.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7zay.ent.gz | 191.8 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7zay.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 7zay_validation.pdf.gz | 1.2 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7zay_full_validation.pdf.gz | 1.3 MB | 表示 | |
XML形式データ | 7zay_validation.xml.gz | 50.4 KB | 表示 | |
CIF形式データ | 7zay_validation.cif.gz | 74.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/za/7zay ftp://data.pdbj.org/pub/pdb/validation_reports/za/7zay | 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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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) Homo sapiens (ヒト) / 遺伝子: EXT1 / 細胞株 (発現宿主): Freestyle 293-F / 発現宿主: Homo sapiens (ヒト) 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) Homo sapiens (ヒト) / 遺伝子: EXT2 / 細胞株 (発現宿主): Freestyle 293-F / 発現宿主: Homo sapiens (ヒト) 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 |
-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 |
-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: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: Freestyle 293-F |
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 |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: OTHER |
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) |
-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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