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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: 9gk2 | |||||||||||||||||||||||||||
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| タイトル | Surface-layer (S-layer) PS2 protein from Corynebacterium glutamicum | |||||||||||||||||||||||||||
要素 | PS2 | |||||||||||||||||||||||||||
キーワード | STRUCTURAL PROTEIN / S-layer / Corynebacterium / Surface | |||||||||||||||||||||||||||
| 機能・相同性 | PS2 機能・相同性情報 | |||||||||||||||||||||||||||
| 生物種 | Corynebacterium glutamicum (バクテリア) | |||||||||||||||||||||||||||
| 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: 2.5 Å | |||||||||||||||||||||||||||
データ登録者 | Sogues, A. / Remaut, H. / Sleutel, M. | |||||||||||||||||||||||||||
| 資金援助 | European Union, 2件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2025タイトル: Cryo-EM structure and polar assembly of the PS2 S-layer of . 著者: Adrià Sogues / Mike Sleutel / Julienne Petit / Daniela Megrian / Nicolas Bayan / Anne Marie Wehenkel / Han Remaut / ![]() 要旨: The polar-growing have a complex cell envelope architecture characterized by the presence of a specialized outer membrane composed of mycolic acids. In some , this mycomembrane is further supported ...The polar-growing have a complex cell envelope architecture characterized by the presence of a specialized outer membrane composed of mycolic acids. In some , this mycomembrane is further supported by a proteinaceous surface layer or "S-layer," whose function, structure, and mode of assembly remain largely enigmatic. Here, we isolated ex vivo PS2 S-layers from the industrially important and determined its atomic structure by 3D cryo-EM reconstruction. PS2 monomers consist of a six-helix bundle "core," a three-helix bundle "arm," and a C-terminal transmembrane (TM) helix. The PS2 core oligomerizes into hexameric units anchored in the mycomembrane by a channel-like coiled-coil of the TM helices. The PS2 arms mediate trimeric lattice contacts, crystallizing the hexameric units into an intricate semipermeable lattice. Using pulse-chase live cell imaging, we show that the PS2 lattice is incorporated at the poles, coincident with the actinobacterial elongasome. Finally, phylogenetic analysis shows a paraphyletic distribution and dispersed chromosomal location of PS2 in as a result of multiple recombination events and losses. These findings expand our understanding of S-layer biology and enable applications of membrane-supported self-assembling bioengineered materials. #1: ジャーナル: bioRxiv / 年: 2024 タイトル: Cryo-EM structure and polar assembly of the PS2 S-layer of . 著者: Adrià Sogues / Mike Sleutel / Julienne Petit / Daniela Megrian / Nicolas Bayan / Anne Marie Wehenkel / Han Remaut / ![]() 要旨: The polar-growing Corynebacteriales have a complex cell envelope architecture characterized by the presence of a specialized outer membrane composed of mycolic acids. In some Corynebacteriales, this ...The polar-growing Corynebacteriales have a complex cell envelope architecture characterized by the presence of a specialized outer membrane composed of mycolic acids. In some Corynebacteriales, this mycomembrane is further supported by a proteinaceous surface layer or 'S-layer', whose function, structure and mode of assembly remain largely enigmatic. Here, we isolated PS2 S-layers from the industrially important and determined its atomic structure by 3D cryoEM reconstruction. PS2 monomers consist of a six-helix bundle 'core', a three-helix bundle 'arm', and a C-terminal transmembrane (TM) helix. The PS2 core oligomerizes into hexameric units anchored in the mycomembrane by a channel-like coiled-coil of the TM helices. The PS2 arms mediate trimeric lattice contacts, crystallizing the hexameric units into an intricate semipermeable lattice. Using pulse-chase live cell imaging, we show that the PS2 lattice is incorporated at the poles, coincident with the actinobacterial elongasome. Finally, phylogenetic analysis shows a paraphyletic distribution and dispersed chromosomal location of PS2 in Corynebacteriales as a result of multiple recombination events and losses. These findings expand our understanding of S-layer biology and enable applications of membrane-supported self-assembling bioengineered materials. | |||||||||||||||||||||||||||
| 履歴 |
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9gk2.cif.gz | 1.4 MB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9gk2.ent.gz | 1.2 MB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9gk2.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/gk/9gk2 ftp://data.pdbj.org/pub/pdb/validation_reports/gk/9gk2 | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 51414MC 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 F&H 検索 |
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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: 47666.859 Da / 分子数: 18 / 由来タイプ: 組換発現 由来: (組換発現) Corynebacterium glutamicum (バクテリア)遺伝子: csp2 / 発現宿主: Corynebacterium glutamicum (バクテリア) / 参照: UniProt: Q04985Has 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: 2D ARRAY / 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: Ex vivo PS2 S-layer / タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / 由来: NATURAL |
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| 由来(天然) | 生物種: Corynebacterium glutamicum (バクテリア) |
| 緩衝液 | pH: 7.4 |
| 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
| 顕微鏡 | モデル: JEOL CRYO ARM 300 |
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| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1600 nm / 最小 デフォーカス(公称値): 1400 nm |
| 撮影 | 電子線照射量: 60.3 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / バージョン: 1.21_5207: / カテゴリ: モデル精密化 |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
| 3次元再構成 | 解像度: 2.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 521917 / 対称性のタイプ: POINT |
ムービー
コントローラー
万見について




Corynebacterium glutamicum (バクテリア)
引用


PDBj
FIELD EMISSION GUN