- EMDB-19046: DNA bound type IV-A1 CRISPR effector complex from P. oleovorans -
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基本情報
登録情報
データベース: EMDB / ID: EMD-19046
タイトル
DNA bound type IV-A1 CRISPR effector complex from P. oleovorans
マップデータ
composite map used for final refinement
試料
複合体: Type IV-A1 CRISPR-Cas effector complex from Pseudomonas oleovorans bound to crRNA and target DNA
複合体: Type IV-A1 CRISPR-Cas effector complex from Pseudomonas oleovorans bound to crRNA
タンパク質・ペプチド: CRISPR type AFERR-associated protein Csf2
タンパク質・ペプチド: CRISPR type AFERR-associated protein Csf3
タンパク質・ペプチド: CRISPR type AFERR-associated protein Csf1
RNA: crRNA
タンパク質・ペプチド: CRISPR type AFERR-associated protein Csf5
複合体: Target DNA
DNA: Target strand (TS) DNA
DNA: Non-target strand (NTS) DNA
リガンド: ZINC ION
キーワード
CRISPR / crRNA / DNA binding / type IV CRISPR-Cas / CRISPRi / nuclease deficient / GENE REGULATION
機能・相同性
CRISPR-associated protein, Csf1 family / CRISPR type IV/AFERR-associated protein Csf2 / CRISPR type AFERR-associated protein Csf1 / CRISPR type AFERR-associated protein Csf2 / CRISPR type AFERR-associated protein Csf3 / Uncharacterized protein
ジャーナル: Nat Commun / 年: 2024 タイトル: Structural variation of types IV-A1- and IV-A3-mediated CRISPR interference. 著者: R Čepaitė / N Klein / A Mikšys / S Camara-Wilpert / V Ragožius / F Benz / A Skorupskaitė / H Becker / G Žvejytė / N Steube / G K A Hochberg / L Randau / R Pinilla-Redondo / L ...著者: R Čepaitė / N Klein / A Mikšys / S Camara-Wilpert / V Ragožius / F Benz / A Skorupskaitė / H Becker / G Žvejytė / N Steube / G K A Hochberg / L Randau / R Pinilla-Redondo / L Malinauskaitė / P Pausch / 要旨: CRISPR-Cas mediated DNA-interference typically relies on sequence-specific binding and nucleolytic degradation of foreign genetic material. Type IV-A CRISPR-Cas systems diverge from this general ...CRISPR-Cas mediated DNA-interference typically relies on sequence-specific binding and nucleolytic degradation of foreign genetic material. Type IV-A CRISPR-Cas systems diverge from this general mechanism, using a nuclease-independent interference pathway to suppress gene expression for gene regulation and plasmid competition. To understand how the type IV-A system associated effector complex achieves this interference, we determine cryo-EM structures of two evolutionarily distinct type IV-A complexes (types IV-A1 and IV-A3) bound to cognate DNA-targets in the presence and absence of the type IV-A signature DinG effector helicase. The structures reveal how the effector complexes recognize the protospacer adjacent motif and target-strand DNA to form an R-loop structure. Additionally, we reveal differences between types IV-A1 and IV-A3 in DNA interactions and structural motifs that allow for in trans recruitment of DinG. Our study provides a detailed view of type IV-A mediated DNA-interference and presents a structural foundation for engineering type IV-A-based genome editing tools.