- EMDB-34218: Structure of the Cas7-11-Csx29-guide RNA-target RNA (non-matching... -
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Basic information
Entry
Database: EMDB / ID: EMD-34218
Title
Structure of the Cas7-11-Csx29-guide RNA-target RNA (non-matching PFS) complex
Map data
Sample
Complex: Cas7-11 in complex with a crRNA and its target RNA
Complex: crRNA
RNA: crRNA
Complex: target RNA with 3'-tag
RNA: target RNA with non-matching PFS
Complex: Cas7-11, Csx29
Protein or peptide: CRISPR-associated RAMP family protein
Protein or peptide: CHAT domain-containing protein
Ligand: CYTIDINE-5'-MONOPHOSPHATE
Ligand: ADENOSINE MONOPHOSPHATE
Ligand: ZINC ION
Keywords
CRISPR / RNase / RNA BINDING PROTEIN-RNA COMPLEX
Function / homology
CHAT domain / CHAT domain / : / CRISPR type III-associated protein / RAMP superfamily / defense response to virus / CRISPR-associated RAMP family protein / CHAT domain-containing protein
Function and homology information
Biological species
Desulfonema ishimotonii (bacteria)
Method
single particle reconstruction / cryo EM / Resolution: 2.84 Å
Japan Agency for Medical Research and Development (AMED)
Japan
Citation
Journal: Science / Year: 2022 Title: RNA-triggered protein cleavage and cell growth arrest by the type III-E CRISPR nuclease-protease. Authors: Kazuki Kato / Sae Okazaki / Cian Schmitt-Ulms / Kaiyi Jiang / Wenyuan Zhou / Junichiro Ishikawa / Yukari Isayama / Shungo Adachi / Tomohiro Nishizawa / Kira S Makarova / Eugene V Koonin / ...Authors: Kazuki Kato / Sae Okazaki / Cian Schmitt-Ulms / Kaiyi Jiang / Wenyuan Zhou / Junichiro Ishikawa / Yukari Isayama / Shungo Adachi / Tomohiro Nishizawa / Kira S Makarova / Eugene V Koonin / Omar O Abudayyeh / Jonathan S Gootenberg / Hiroshi Nishimasu / Abstract: The type III-E CRISPR-Cas7-11 effector binds a CRISPR RNA (crRNA) and the putative protease Csx29 and catalyzes crRNA-guided RNA cleavage. We report cryo-electron microscopy structures of the Cas7-11- ...The type III-E CRISPR-Cas7-11 effector binds a CRISPR RNA (crRNA) and the putative protease Csx29 and catalyzes crRNA-guided RNA cleavage. We report cryo-electron microscopy structures of the Cas7-11-crRNA-Csx29 complex with and without target RNA (tgRNA), and demonstrate that tgRNA binding induces conformational changes in Csx29. Biochemical experiments revealed tgRNA-dependent cleavage of the accessory protein Csx30 by Csx29. Reconstitution of the system in bacteria showed that Csx30 cleavage yields toxic protein fragments that cause growth arrest, which is regulated by Csx31. Csx30 binds Csx31 and the associated sigma factor RpoE (RNA polymerase, extracytoplasmic E), suggesting that Csx30-mediated RpoE inhibition modulates the cellular response to infection. We engineered the Cas7-11-Csx29-Csx30 system for programmable RNA sensing in mammalian cells. Overall, the Cas7-11-Csx29 effector is an RNA-dependent nuclease-protease.
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