4L6U

Crystal structure of AF1868: Cmr1 subunit of the Cmr RNA silencing complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.231 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure and CRISPR RNA-binding site of the Cmr1 subunit of the Cmr interference complex

Sun, J.Jeon, J.H.Shin, M.Shin, H.C.Oh, B.H.Kim, J.S.

(2014) Acta Crystallogr D Biol Crystallogr 70: 535-543

  • DOI: 10.1107/S1399004713030290
  • Primary Citation of Related Structures:  
    4L6U

  • PubMed Abstract: 
  • A multi-subunit ribonucleoprotein complex termed the Cmr RNA-silencing complex recognizes and destroys viral RNA in the CRISPR-mediated immune defence mechanism in many prokaryotes using an as yet unclear mechanism. In Archaeoglobus fulgidus, this complex consists of six subunits, Cmr1-Cmr6 ...

    A multi-subunit ribonucleoprotein complex termed the Cmr RNA-silencing complex recognizes and destroys viral RNA in the CRISPR-mediated immune defence mechanism in many prokaryotes using an as yet unclear mechanism. In Archaeoglobus fulgidus, this complex consists of six subunits, Cmr1-Cmr6. Here, the crystal structure of Cmr1 from A. fulgidus is reported, revealing that the protein is composed of two tightly associated ferredoxin-like domains. The domain located at the N-terminus is structurally most similar to the N-terminal ferredoxin-like domain of the CRISPR RNA-processing enzyme Cas6 from Pyrococcus furiosus. An ensuing mutational analysis identified a highly conserved basic surface patch that binds single-stranded nucleic acids specifically, including the mature CRISPR RNA, but in a sequence-independent manner. In addition, this subunit was found to cleave single-stranded RNA. Together, these studies elucidate the structure and the catalytic activity of the Cmr1 subunit.


    Organizational Affiliation

    Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized protein AB329Archaeoglobus fulgidus DSM 4304Mutation(s): 0 
Gene Names: AF_1868
Find proteins for O28411 (Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126))
Explore O28411 
Go to UniProtKB:  O28411
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.231 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.695α = 90
b = 64.162β = 93.79
c = 79.278γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-12
    Type: Initial release
  • Version 1.1: 2015-02-25
    Changes: Database references