- EMDB-41358: Structure of activated SAVED-CHAT filament -
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基本情報
登録情報
データベース: EMDB / ID: EMD-41358
タイトル
Structure of activated SAVED-CHAT filament
マップデータ
試料
複合体: Active SAVED-CHAT filament
タンパク質・ペプチド: CHAT domain-containing protein
RNA: RNA (5'-R(*AP*AP*A)-3')
キーワード
SAVED-CHAT / IMMUNE SYSTEM
機能・相同性
SMODS-associated and fused to various effectors / SMODS-associated and fused to various effectors sensor domain / CHAT domain / CHAT domain / CHAT domain-containing protein
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM138348
米国
引用
ジャーナル: Science / 年: 2024 タイトル: Type III-B CRISPR-Cas cascade of proteolytic cleavages. 著者: Jurre A Steens / Jack P K Bravo / Carl Raymund P Salazar / Caglar Yildiz / Afonso M Amieiro / Stephan Köstlbacher / Stijn H P Prinsen / Ane S Andres / Constantinos Patinios / Andreas Bardis ...著者: Jurre A Steens / Jack P K Bravo / Carl Raymund P Salazar / Caglar Yildiz / Afonso M Amieiro / Stephan Köstlbacher / Stijn H P Prinsen / Ane S Andres / Constantinos Patinios / Andreas Bardis / Arjan Barendregt / Richard A Scheltema / Thijs J G Ettema / John van der Oost / David W Taylor / Raymond H J Staals / 要旨: The generation of cyclic oligoadenylates and subsequent allosteric activation of proteins that carry sensory domains is a distinctive feature of type III CRISPR-Cas systems. In this work, we ...The generation of cyclic oligoadenylates and subsequent allosteric activation of proteins that carry sensory domains is a distinctive feature of type III CRISPR-Cas systems. In this work, we characterize a set of associated genes of a type III-B system from that contains two caspase-like proteases, SAVED-CHAT and PCaspase (prokaryotic caspase), co-opted from a cyclic oligonucleotide-based antiphage signaling system (CBASS). Cyclic tri-adenosine monophosphate (AMP)-induced oligomerization of SAVED-CHAT activates proteolytic activity of the CHAT domains, which specifically cleave and activate PCaspase. Subsequently, activated PCaspase cleaves a multitude of proteins, which results in a strong interference phenotype in vivo in Taken together, our findings reveal how a CRISPR-Cas-based detection of a target RNA triggers a cascade of caspase-associated proteolytic activities.