Macromolecule Content

• Total Structure Weight: 19.71 kDa 
• Atom Count: 1380 
• Residue Count: 179 
• Unique protein chains: 1

1QU6

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

• DOI: 10.2210/pdb1QU6/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-07-08 Released: 1999-12-23 
• Deposition Author(s): Nanduri, S., Carpick, B.W., Yang, Y., Williams, B.R.G., Qin, J.

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Experimental Data Snapshot

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

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

• PubMed: 9736623 
• DOI: 10.1093/emboj/17.18.5458
• Structures With Same Primary Citation


• 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) 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROTEIN KINASE PKR	A	179	Homo sapiens	Mutation(s): 0  Gene Names: EIF2AK2, PKR, PRKR 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 GTEx  ENSG00000055332

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-07-08 
• Released Date: 1999-12-23 
Deposition Author(s): Nanduri, S., Carpick, B.W., Yang, Y., Williams, B.R.G., Qin, J.

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