1QU6

STRUCTURE OF THE DOUBLE-STRANDED RNA-BINDING DOMAIN OF THE PROTEIN KINASE PKR REVEALS THE MOLECULAR BASIS OF ITS DSRNA-MEDIATED ACTIVATION


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 90 
  • Conformers Submitted: 21 

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This is version 1.2 of the entry. See complete history


Literature

Structure of the double-stranded RNA-binding domain of the protein kinase PKR reveals the molecular basis of its dsRNA-mediated activation.

Nanduri, S.Carpick, B.W.Yang, Y.Williams, B.R.Qin, J.

(1998) EMBO J 17: 5458-5465

  • DOI: 10.1093/emboj/17.18.5458
  • Primary Citation of Related Structures:  
    1QU6

  • PubMed Abstract: 
  • Protein kinase PKR is an interferon-induced enzyme that plays a key role in the control of viral infections and cellular homeostasis. Compared with other known kinases, PKR is activated by a distinct mechanism that involves double-stranded RNA (dsRNA ...

    Protein kinase PKR is an interferon-induced enzyme that plays a key role in the control of viral infections and cellular homeostasis. Compared with other known kinases, PKR is activated by a distinct mechanism that involves double-stranded RNA (dsRNA) binding in its N-terminal region in an RNA sequence-independent fashion. We report here the solution structure of the 20 kDa dsRNA-binding domain (dsRBD) of human PKR, which provides the first three-dimensional insight into the mechanism of its dsRNA-mediated activation. The structure of dsRBD exhibits a dumb-bell shape comprising two tandem linked dsRNA-binding motifs (dsRBMs) both with an alpha-beta-beta-beta-alpha fold. The structure, combined with previous mutational and biochemical data, reveals a highly conserved RNA-binding site on each dsRBM and suggests a novel mode of protein-RNA recognition. The central linker is highly flexible, which may enable the two dsRBMs to wrap around the RNA duplex for cooperative and high-affinity binding, leading to the overall change of PKR conformation and its activation.


    Organizational Affiliation

    Structural Biology Program, Lerner Research Institute, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN KINASE PKRA179Homo sapiensMutation(s): 0 
Gene Names: EIF2AK2PKRPRKR
EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt), 2.7.10.2 (UniProt)
Find proteins for P19525 (Homo sapiens)
Explore P19525 
Go to UniProtKB:  P19525
NIH Common Fund Data Resources
PHAROS  P19525
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 90 
  • Conformers Submitted: 21 
  • OLDERADO: 1QU6 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-23
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance