3I7K

Crystal Structure of DDB1 in Complex with the H-Box Motif of WHX

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 

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


Literature

A promiscuous alpha-helical motif anchors viral hijackers and substrate receptors to the CUL4-DDB1 ubiquitin ligase machinery.

Li, T., Robert, E.I., van Breugel, P.C., Strubin, M., Zheng, N.

(2010) Nat Struct Mol Biol 17: 105-111

  • DOI: 10.1038/nsmb.1719
  • Primary Citation of Related Structures:  
    3I8C, 3I8E, 3I89, 3I7K, 3I7L, 3I7N, 3I7O, 3I7P, 3I7H

  • PubMed Abstract: 

    • The cullin 4-DNA-damage-binding protein 1 (CUL4-DDB1) ubiquitin ligase machinery regulates diverse cellular functions and can be subverted by pathogenic viruses. Here we report the crystal structure of DDB1 in complex with a central fragment of hepat ...

    The cullin 4-DNA-damage-binding protein 1 (CUL4-DDB1) ubiquitin ligase machinery regulates diverse cellular functions and can be subverted by pathogenic viruses. Here we report the crystal structure of DDB1 in complex with a central fragment of hepatitis B virus X protein (HBx), whose DDB1-binding activity is important for viral infection. The structure reveals that HBx binds DDB1 through an alpha-helical motif, which is also found in the unrelated paramyxovirus SV5-V protein despite their sequence divergence. Our structure-based functional analysis suggests that, like SV5-V, HBx captures DDB1 to redirect the ubiquitin ligase activity of the CUL4-DDB1 E3 ligase. We also identify the alpha-helical motif shared by these viral proteins in the cellular substrate-recruiting subunits of the E3 complex, the DDB1-CUL4-associated factors (DCAFs) that are functionally mimicked by the viral hijackers. Together, our studies reveal a common yet promiscuous structural element that is important for the assembly of cellular and virally hijacked CUL4-DDB1 E3 complexes.

    Organizational Affiliation: 

    Department of Pharmacology, University of Washington, Seattle, Washington, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA damage-binding protein 1A1143Homo sapiensMutation(s): 0 
Gene Names: DDB1, XAP1
Find proteins for Q16531 (Homo sapiens)
Explore Q16531 
Go to UniProtKB:  Q16531
NIH Common Fund Data Resources
PHAROS  Q16531
GTEx  ENSG00000167986
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
X proteinB14Woodchuck hepatitis virus 8Mutation(s): 0 
Find proteins for P03167 (Woodchuck hepatitis B virus (isolate 1))
Explore P03167 
Go to UniProtKB:  P03167
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.081α = 90
b = 132.215β = 90
c = 184.001γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance