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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9bhc | ||||||||||||||||||||||||
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タイトル | Salmonella undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase (ArnC) | ||||||||||||||||||||||||
![]() | Undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase | ||||||||||||||||||||||||
![]() | MEMBRANE PROTEIN / transferase / glycolipid biosynthesis / Structural Genomics / Center for Structural Biology of Infectious Diseases / CSBID | ||||||||||||||||||||||||
機能・相同性 | ![]() undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase / undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase activity / 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate biosynthetic process / phosphotransferase activity, for other substituted phosphate groups / lipopolysaccharide biosynthetic process / lipid A biosynthetic process / response to antibiotic / plasma membrane 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: 2.75 Å | ||||||||||||||||||||||||
![]() | Guo, Y. / Borek, D. / Center for Structural Biology of Infectious Diseases (CSBID) | ||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM SPR structures of Salmonella typhimurium ArnC; the key enzyme in lipid-A modification conferring polymyxin resistance. 著者: Dhruvin H Patel / Elina Karimullina / Yirui Guo / Cameron Semper / Deepak T Patel / Tabitha Emde / Dominika Borek / Alexei Savchenko / ![]() ![]() 要旨: Polymyxins are last-resort antimicrobial peptides administered clinically against multi-drug resistant bacteria, specifically in the case of Gram-negative species. However, an increasing number of ...Polymyxins are last-resort antimicrobial peptides administered clinically against multi-drug resistant bacteria, specifically in the case of Gram-negative species. However, an increasing number of these pathogens employ a defense strategy that involves a relay of enzymes encoded by the pmrE (ugd) loci and the arnBCDTEF operon. The pathway modifies the lipid-A component of the outer membrane (OM) lipopolysaccharide (LPS) by adding a 4-amino-4-deoxy-l-arabinose (L-Ara4N) headgroup, which renders polymyxins ineffective. Here, we report the cryo-EM SPR structures of glycosyltransferase ArnC from Salmonella typhimurium determined in apo and UDP-bound forms at resolutions 2.75 Å and 3.8 Å, respectively. The structure of the ArnC protomer comprises three distinct regions: an N-terminal glycosyltransferase domain, transmembrane region, and the interface helices (IHs). ArnC forms a tetramer with C2 symmetry, where the C-terminal strand inserts into the adjacent protomer. This tetrameric state is further stabilized by two distinct interfaces formed by ArnC that form a network of hydrogen bonds and salt bridges. The binding of UDP induces conformational changes that stabilize the loop between residues H201 to S213, and part of the putative catalytic pocket formed by IH1 and IH2. The surface property analysis revealed a hydrophobic cavity formed by TM1 and TM2 in the apo state, which is disrupted upon UDP binding. The comparison of ArnC structures to their homologs GtrB and DPMS suggests the key residues involved in ArnC catalytic activity. | ||||||||||||||||||||||||
履歴 |
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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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ダウンロード
PDBx/mmCIF形式 | ![]() | 239.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 194.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
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 | ![]() 44540MC ![]() 9bheC 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: 36555.238 Da / 分子数: 4 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: arnC, pmrF, A7D45_16095, AL463_15935, ASQ14_23645, ATP91_09815, ATQ15_08305, ATR96_07550, AZF90_19445, BH006_03370, CIC26_13560, CQW68_14900, D3346_04750, D3Q81_13430, DT651_10455, EAW95_ ...遺伝子: arnC, pmrF, A7D45_16095, AL463_15935, ASQ14_23645, ATP91_09815, ATQ15_08305, ATR96_07550, AZF90_19445, BH006_03370, CIC26_13560, CQW68_14900, D3346_04750, D3Q81_13430, DT651_10455, EAW95_08415, EBH50_05830, EKD96_13640, F2D26_03380, FJR52_16380, GCH85_08890, NCTC6385_01766, ND68_10730, VH79_14330 発現宿主: ![]() ![]() 参照: UniProt: A0A663DHR7, undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase Has protein modification | N | |
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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: ArnC homo tetramer / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 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): 2500 nm / 最小 デフォーカス(公称値): 800 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 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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3次元再構成 | 解像度: 2.75 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 311189 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化 | 解像度: 2.75→113.424 Å / Cor.coef. Fo:Fc: 0.907 / WRfactor Rwork: 0.359 / SU B: 9.641 / SU ML: 0.175 / Average fsc overall: 0.7351 / Average fsc work: 0.7351 / ESU R: 0.309 / 詳細: Hydrogens have been added in their riding positions
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溶媒の処理 | 溶媒モデル: BABINET MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 109.868 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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