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基本情報
登録情報 | データベース: PDB / ID: 8c0b | ||||||
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タイトル | CryoEM structure of Aspergillus nidulans UTP-glucose-1-phosphate uridylyltransferase | ||||||
![]() | UTP--glucose-1-phosphate uridylyltransferase | ||||||
![]() | SUGAR BINDING PROTEIN / NDP-sugar pyrophosphorylases / UDP-Glc pyrophosphorylases / cell wall biosynthesis / Aspergillus nidulans. | ||||||
機能・相同性 | ![]() (1->6)-beta-D-glucan biosynthetic process / UTP-glucose-1-phosphate uridylyltransferase / UTP:glucose-1-phosphate uridylyltransferase activity / trehalose biosynthetic process / UDP-alpha-D-glucose metabolic process / glycogen biosynthetic process / glycogen metabolic process / 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: 3.98 Å | ||||||
![]() | Han, X. / D Angelo, C. / Otamendi, A. / Cifuente, J.O. / de Astigarraga, E. / Ochoa-Lizarralde, B. / Grininger, M. / Routier, F.H. / Guerin, M.E. / Fuehring, J. ...Han, X. / D Angelo, C. / Otamendi, A. / Cifuente, J.O. / de Astigarraga, E. / Ochoa-Lizarralde, B. / Grininger, M. / Routier, F.H. / Guerin, M.E. / Fuehring, J. / Etxebeste, O. / Connell, S.R. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: CryoEM analysis of the essential native UDP-glucose pyrophosphorylase from reveals key conformations for activity regulation and function. 著者: Xu Han / Cecilia D'Angelo / Ainara Otamendi / Javier O Cifuente / Elisa de Astigarraga / Borja Ochoa-Lizarralde / Martin Grininger / Francoise H Routier / Marcelo E Guerin / Jana Fuehring / ...著者: Xu Han / Cecilia D'Angelo / Ainara Otamendi / Javier O Cifuente / Elisa de Astigarraga / Borja Ochoa-Lizarralde / Martin Grininger / Francoise H Routier / Marcelo E Guerin / Jana Fuehring / Oier Etxebeste / Sean R Connell / ![]() ![]() 要旨: Invasive aspergillosis is one of the most serious clinical invasive fungal infections, resulting in a high case fatality rate among immunocompromised patients. The disease is caused by saprophytic ...Invasive aspergillosis is one of the most serious clinical invasive fungal infections, resulting in a high case fatality rate among immunocompromised patients. The disease is caused by saprophytic molds in the genus , including , the most significant pathogenic species. The fungal cell wall, an essential structure mainly composed of glucan, chitin, galactomannan, and galactosaminogalactan, represents an important target for the development of antifungal drugs. UDP (uridine diphosphate)-glucose pyrophosphorylase (UGP) is a central enzyme in the metabolism of carbohydrates that catalyzes the biosynthesis of UDP-glucose, a key precursor of fungal cell wall polysaccharides. Here, we demonstrate that the function of UGP is vital for (UGP). To understand the molecular basis of UGP function, we describe a cryoEM structure (global resolution of 3.5 Å for the locally refined subunit and 4 Å for the octameric complex) of a native UGP. The structure reveals an octameric architecture with each subunit comprising an N-terminal α-helical domain, a central catalytic glycosyltransferase A-like (GT-A-like) domain, and a C-terminal (CT) left-handed β-helix oligomerization domain. UGP displays unprecedented conformational variability between the CT oligomerization domain and the central GT-A-like catalytic domain. In combination with activity measurements and bioinformatics analysis, we unveil the molecular mechanism of substrate recognition and specificity for UGP. Altogether, our study not only contributes to understanding the molecular mechanism of catalysis/regulation of an important class of enzymes but also provides the genetic, biochemical, and structural groundwork for the future exploitation of UGP as a potential antifungal target. IMPORTANCE Fungi cause diverse diseases in humans, ranging from allergic syndromes to life-threatening invasive diseases, together affecting more than a billion people worldwide. Increasing drug resistance in species represents an emerging global health threat, making the design of antifungals with novel mechanisms of action a worldwide priority. The cryoEM structure of UDP (uridine diphosphate)-glucose pyrophosphorylase (UGP) from the filamentous fungus reveals an octameric architecture displaying unprecedented conformational variability between the C-terminal oligomerization domain and the central glycosyltransferase A-like catalytic domain in the individual protomers. While the active site and oligomerization interfaces are more highly conserved, these dynamic interfaces include motifs restricted to specific clades of filamentous fungi. Functional study of these motifs could lead to the definition of new targets for antifungals inhibiting UGP activity and, thus, the architecture of the cell wall of filamentous fungal pathogens. | ||||||
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構造ビューア | 分子: ![]() ![]() |
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その他 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 16357MC 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: 57634.672 Da / 分子数: 8 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() 参照: UniProt: C8VK50, UTP-glucose-1-phosphate uridylyltransferase |
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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: UTP--glucose-1-phosphate uridylyltransferase / タイプ: COMPLEX / Entity ID: all / 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: 7.8 詳細: 50 mM Tris, 200 mM NaCl, 2 mM Beta-mercaptoethanol, pH 7.8 | ||||||||||||||||||||
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試料 | 濃度: 0.18 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: The sample was monodisperse | ||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / 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 |
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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): 500 nm |
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) |
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解析
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||
3次元再構成 | 解像度: 3.98 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 126375 / 対称性のタイプ: POINT |