+検索条件
-Structure paper
| タイトル | The Psu protein of phage satellite P4 inhibits transcription termination factor ρ by forced hyper-oligomerization. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 550, Year 2025 |
| 掲載日 | 2025年1月9日 |
著者 | Daniela Gjorgjevikj / Naveen Kumar / Bing Wang / Tarek Hilal / Nelly Said / Bernhard Loll / Irina Artsimovitch / Ranjan Sen / Markus C Wahl / ![]() |
| PubMed 要旨 | Many bacteriophages modulate host transcription to favor expression of their own genomes. Phage satellite P4 polarity suppression protein, Psu, a building block of the viral capsid, inhibits ...Many bacteriophages modulate host transcription to favor expression of their own genomes. Phage satellite P4 polarity suppression protein, Psu, a building block of the viral capsid, inhibits hexameric transcription termination factor, ρ, by presently unknown mechanisms. Our cryogenic electron microscopy structures of ρ-Psu complexes show that Psu dimers clamp two inactive, open ρ rings and promote their expansion to higher-oligomeric states. ATPase, nucleotide binding and nucleic acid binding studies revealed that Psu hinders ρ ring closure and traps nucleotides in their binding pockets on ρ. Structure-guided mutagenesis in combination with growth, pull-down, and termination assays further delineated the functional ρ-Psu interfaces in vivo. Bioinformatic analyses revealed that Psu is associated with a wide variety of phage defense systems across Enterobacteriaceae, suggesting that Psu may regulate expression of anti-phage genes. Our findings show that modulation of the ρ oligomeric state via diverse strategies is a pervasive gene regulatory principle in bacteria. |
リンク | Nat Commun / PubMed:39788982 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.8 - 4.3 Å |
| 構造データ | EMDB-17637: Rho-ATPgS-Psu complex I EMDB-17639: Rho-ATPgS-Psu complex II EMDB-17640: Rho P167L-ATPgS-Psu complex I EMDB-17641: Rho P167L-ATPgS-Psu complex II EMDB-51235, PDB-9gcs: EMDB-51236, PDB-9gct: EMDB-51237, PDB-9gcu: |
| 化合物 | ![]() ChemComp-AGS: ![]() ChemComp-MG: ![]() ChemComp-ATP: ![]() ChemComp-ADP: ![]() ChemComp-HOH: |
| 由来 |
|
キーワード | GENE REGULATION / Transcription termination / Phage inhibitor / TRANSCRIPTION |
ムービー
コントローラー
構造ビューア
万見文献について



著者

リンク



















enterobacteria phage p4 (ファージ)
キーワード