5WTJ

Crystal structure of an endonuclease

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.264 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Two Distant Catalytic Sites Are Responsible for C2c2 RNase Activities

Liu, L., Li, X., Wang, J., Wang, M., Chen, P., Yin, M., Li, J., Sheng, G., Wang, Y.

(2017) Cell 168: 121-134.e12

  • DOI: 10.1016/j.cell.2016.12.031
  • Primary Citation of Related Structures:  
    5WTJ, 5WTK

  • PubMed Abstract: 

    • C2c2, the effector of type VI CRISPR-Cas systems, has two RNase activities-one for cutting its RNA target and the other for processing the CRISPR RNA (crRNA). Here, we report the structures of Leptotrichia shahii C2c2 in its crRNA-free and crRNA-bound states ...

    C2c2, the effector of type VI CRISPR-Cas systems, has two RNase activities-one for cutting its RNA target and the other for processing the CRISPR RNA (crRNA). Here, we report the structures of Leptotrichia shahii C2c2 in its crRNA-free and crRNA-bound states. While C2c2 has a bilobed structure reminiscent of all other Class 2 effectors, it also exhibits different structural characteristics. It contains the REC lobe with a Helical-1 domain and the NUC lobe with two HEPN domains. The two RNase catalytic pockets responsible for cleaving pre-crRNA and target RNA are independently located on Helical-1 and HEPN domains, respectively. crRNA binding induces significant conformational changes that are likely to stabilize crRNA binding and facilitate target RNA recognition. These structures provide important insights into the molecular mechanism of dual RNase activities of C2c2 and establish a framework for its future engineering as a RNA editing tool.

    Organizational Affiliation: 

    Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Collaborative Innovation Center of Genetics and Development, Shanghai 200438, China. Electronic address: ylwang@ibp.ac.cn.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CRISPR-associated endoribonuclease C2c2A, B1397Leptotrichia shahii DSM 19757Mutation(s): 0 
Gene Names: c2c2, cas13a
EC: 3.1
UniProt
Find proteins for P0DOC6 (Leptotrichia shahii (strain DSM 19757 / CCUG 47503 / CIP 107916 / JCM 16776 / LB37))
Explore P0DOC6 
Go to UniProtKB:  P0DOC6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		A, BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.264 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.658α = 90
b = 94.231β = 90
c = 338.218γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXphasing
HKL-3000data scaling
HKL-3000data processing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2016-12-13 
  • Released Date: 2017-02-08 
    • Deposition Author(s): Liu, L., Wang, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-08
    Type: Initial release
  • Version 1.1: 2017-08-30
    Changes: Data collection