2PY9

Protein-RNA Interaction involving KH1 domain from Human Poly(C)-Binding Protein-2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.218 

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This is version 1.2 of the entry. See complete history. 

Literature

X-ray crystallographic and NMR studies of protein-protein and protein-nucleic acid interactions involving the KH domains from human poly(C)-binding protein-2.

Du, Z., Lee, J.K., Fenn, S., Tjhen, R., Stroud, R.M., James, T.L.

(2007) Rna 13: 1043-1051

  • DOI: 10.1261/rna.410107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Poly(C)-binding proteins (PCBPs) are KH (hnRNP K homology) domain-containing proteins that recognize poly(C) DNA and RNA sequences in mammalian cells. Binding poly(C) sequences via the KH domains is critical for PCBP functions. To reveal the mechanis ...

    Poly(C)-binding proteins (PCBPs) are KH (hnRNP K homology) domain-containing proteins that recognize poly(C) DNA and RNA sequences in mammalian cells. Binding poly(C) sequences via the KH domains is critical for PCBP functions. To reveal the mechanisms of KH domain-D/RNA recognition and its functional importance, we have determined the crystal structures of PCBP2 KH1 domain in complex with a 12-nucleotide DNA corresponding to two repeats of the human C-rich strand telomeric DNA and its RNA equivalent. The crystal structures reveal molecular details for not only KH1-DNA/RNA interaction but also protein-protein interaction between two KH1 domains. NMR studies on a protein construct containing two KH domains (KH1 + KH2) of PCBP2 indicate that KH1 interacts with KH2 in a way similar to the KH1-KH1 interaction. The crystal structures and NMR data suggest possible ways by which binding certain nucleic acid targets containing tandem poly(C) motifs may induce structural rearrangement of the KH domains in PCBPs; such structural rearrangement may be crucial for some PCBP functions.

    Organizational Affiliation: 

    Department of Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, CA 94158-2517, USA.




Macromolecules

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Poly(rC)-binding protein 2
A, B, C, D
73Homo sapiensMutation(s): 0 
Gene Names: PCBP2
Find proteins for Q15366 (Homo sapiens)
Go to Gene View: PCBP2
Go to UniProtKB:  Q15366
Entity ID: 1
MoleculeChainsLengthOrganism
12-mer C-rich strand of human telomeric RNAE,F12N/A
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.218 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 92.006α = 90.00
b = 58.697β = 90.00
c = 71.496γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
Blu-Icedata collection
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-12
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance