7YNC

Cryo-EM structure of Cas7-11-crRNA bound to target RNA-3


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structure and protease activity of the type III-E CRISPR-Cas effector.

Huo, Y.Zhao, H.Dong, Q.Jiang, T.

(2023) Nat Microbiol 8: 522-532

  • DOI: https://doi.org/10.1038/s41564-022-01316-4
  • Primary Citation of Related Structures:  
    7YN9, 7YNA, 7YNB, 7YNC, 7YND

  • PubMed Abstract: 

    The recently discovered type III-E CRISPR-Cas effector Cas7-11 shows promise when used as an RNA manipulation tool, but its structure and the mechanisms underlying its function remain unclear. Here we present four cryo-EM structures of Desulfonema ishimotonii Cas7-11-crRNA complex in pre-target and target RNA-bound states, and the cryo-EM structure of DiCas7-11-crRNA bound to its accessory protein DiCsx29. These data reveal structural elements for pre-crRNA processing, target RNA cleavage and regulation. Moreover, a 3' seed region of crRNA is involved in regulating RNA cleavage activity of DiCas7-11-crRNA-Csx29. Our analysis also shows that both the minimal mismatch of 4 nt to the 5' handle of crRNA and the minimal matching of the first 12 nt of the spacer by the target RNA are essential for triggering the protease activity of DiCas7-11-crRNA-Csx29 towards DiCsx30. Taken together, we propose that target RNA recognition and cleavage regulate and fine-tune the protease activity of DiCas7-11-crRNA-Csx29, thus preventing auto-immune responses.


  • Organizational Affiliation

    National Laboratory of Macromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China. huoyangao@ibp.ac.cn.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CRISPR-associated RAMP family protein1,601Desulfonema ishimotoniiMutation(s): 0 
Gene Names: DENIS_1082
UniProt
Find proteins for A0A401FT36 (Desulfonema ishimotonii)
Explore A0A401FT36 
Go to UniProtKB:  A0A401FT36
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A401FT36
Sequence Annotations
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains LengthOrganismImage
crRNA (38-MER)47Desulfonema ishimotonii
Sequence Annotations
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains LengthOrganismImage
Target RNA-3 (28-MER)47Desulfonema ishimotonii
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Chinese Academy of SciencesChinaXDB37010301

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-01
    Type: Initial release
  • Version 1.1: 2023-02-08
    Changes: Database references
  • Version 1.2: 2023-03-15
    Changes: Database references