ジャーナル: Nat Commun / 年: 2025 タイトル: Phage parasites targeting phage homologous recombinases provide antiviral immunity. 著者: Gianluca Debiasi-Anders / Cuncun Qiao / Amrita Salim / Na Li / Ignacio Mir-Sanchis / 要旨: Bacteria often carry multiple genes encoding anti-phage defense systems, clustered in defense islands and phage satellites. Various unrelated anti-phage defense systems target phage-encoded ...Bacteria often carry multiple genes encoding anti-phage defense systems, clustered in defense islands and phage satellites. Various unrelated anti-phage defense systems target phage-encoded homologous recombinases (HRs) through unclear mechanisms. Here, we show that the phage satellite SaPI2, which does not encode orthodox anti-phage defense systems, provides antiviral immunity mediated by Stl2, the SaPI2-encoded transcriptional repressor. Stl2 targets and inhibits phage-encoded HRs, including Sak and Sak4, two HRs from the Rad52-like and Rad51-like superfamilies. Remarkably, apo Stl2 forms a collar of dimers oligomerizing as closed rings and as filaments, mimicking the quaternary structure of its targets. Stl2 decorates both Sak rings and Sak4 filaments. The oligomerization of Stl2 as a collar of dimers is necessary for its inhibitory activity both in vitro and in vivo. Our results shed light on the mechanisms underlying antiviral immunity against phages carrying divergent HRs.
履歴
登録
2023年8月30日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2025年3月5日
Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / タイプ: Initial release
改定 1.0
2025年3月5日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
#241 - 2020年1月 20年の分子を振り返って (Twenty Years of Molecules) 類似性 (3)
-
集合体
登録構造単位
1A: DUF1071 domain-containing protein 1B: DUF1071 domain-containing protein 1C: DUF1071 domain-containing protein 1D: DUF1071 domain-containing protein 1E: DUF1071 domain-containing protein 1F: DUF1071 domain-containing protein 1G: DUF1071 domain-containing protein 1H: DUF1071 domain-containing protein 1I: DUF1071 domain-containing protein 1J: DUF1071 domain-containing protein 1K: DUF1071 domain-containing protein 1L: DUF1071 domain-containing protein 1M: DUF1071 domain-containing protein 1N: DUF1071 domain-containing protein 1O: DUF1071 domain-containing protein 1P: DUF1071 domain-containing protein 1Q: DUF1071 domain-containing protein 2A: Helix-turn-helix XRE family protein 2B: Helix-turn-helix XRE family protein 2C: Helix-turn-helix XRE family protein 2D: Helix-turn-helix XRE family protein 2E: Helix-turn-helix XRE family protein 2F: Helix-turn-helix XRE family protein 2G: Helix-turn-helix XRE family protein 2I: Helix-turn-helix XRE family protein 2J: Helix-turn-helix XRE family protein 2L: Helix-turn-helix XRE family protein 2M: Helix-turn-helix XRE family protein 2N: Helix-turn-helix XRE family protein 2O: Helix-turn-helix XRE family protein 2P: Helix-turn-helix XRE family protein 2Q: Helix-turn-helix XRE family protein 3A: Helix-turn-helix XRE family protein 3B: Helix-turn-helix XRE family protein 3C: Helix-turn-helix XRE family protein 3D: Helix-turn-helix XRE family protein 3E: Helix-turn-helix XRE family protein 3F: Helix-turn-helix XRE family protein 3G: Helix-turn-helix XRE family protein 3I: Helix-turn-helix XRE family protein 3J: Helix-turn-helix XRE family protein 3L: Helix-turn-helix XRE family protein 3M: Helix-turn-helix XRE family protein 3N: Helix-turn-helix XRE family protein 3O: Helix-turn-helix XRE family protein 3P: Helix-turn-helix XRE family protein 3Q: Helix-turn-helix XRE family protein 4A: DUF1071 domain-containing protein 4B: DUF1071 domain-containing protein 4C: DUF1071 domain-containing protein 4D: DUF1071 domain-containing protein 4E: DUF1071 domain-containing protein 4F: DUF1071 domain-containing protein 4G: DUF1071 domain-containing protein 4H: DUF1071 domain-containing protein 4I: DUF1071 domain-containing protein 4J: DUF1071 domain-containing protein 4K: DUF1071 domain-containing protein 4L: DUF1071 domain-containing protein 4M: DUF1071 domain-containing protein 4N: DUF1071 domain-containing protein 4O: DUF1071 domain-containing protein 4P: DUF1071 domain-containing protein 4Q: DUF1071 domain-containing protein
モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm
撮影
電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k)
-
解析
EMソフトウェア
ID
名称
バージョン
カテゴリ
4
cryoSPARC
4.2.1
CTF補正
7
UCSF ChimeraX
1.6
モデルフィッティング
9
cryoSPARC
4.2.1
初期オイラー角割当
10
cryoSPARC
4.2.1
最終オイラー角割当
11
cryoSPARC
4.2.1
分類
12
cryoSPARC
4.2.1
3次元再構成
32
PHENIX
1.20.1
モデル精密化
33
Coot
0.9.8.4EL
モデル精密化
CTF補正
タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION
3次元再構成
解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 208222 詳細: Final particle set was symmetry-expanded to D1, multiplying it by 2 to 416444 particles. 対称性のタイプ: POINT