2YHO

The IDOL-UBE2D complex mediates sterol-dependent degradation of the LDL receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Idol-Ube2D Complex Mediates Sterol-Dependent Degradation of the Ldl Receptor.

Zhang, L.Fairall, L.Goult, B.T.Calkin, A.C.Hong, C.Millard, C.J.Tontonoz, P.Schwabe, J.W.

(2011) Genes Dev 25: 1262

  • DOI: 10.1101/gad.2056211
  • Primary Citation of Related Structures:  
    2YHN, 2YHO

  • PubMed Abstract: 
  • We previously identified the E3 ubiquitin ligase IDOL as a sterol-dependent regulator of the LDL receptor (LDLR). The molecular pathway underlying IDOL action, however, remains to be determined. Here we report the identification and biochemical and structural characterization of an E2-E3 ubiquitin ligase complex for LDLR degradation ...

    We previously identified the E3 ubiquitin ligase IDOL as a sterol-dependent regulator of the LDL receptor (LDLR). The molecular pathway underlying IDOL action, however, remains to be determined. Here we report the identification and biochemical and structural characterization of an E2-E3 ubiquitin ligase complex for LDLR degradation. We identified the UBE2D family (UBE2D1-4) as E2 partners for IDOL that support both autoubiquitination and IDOL-dependent ubiquitination of the LDLR in a cell-free system. NMR chemical shift mapping and a 2.1 Å crystal structure of the IDOL RING domain-UBE2D1 complex revealed key interactions between the dimeric IDOL protein and the E2 enzyme. Analysis of the IDOL-UBE2D1 interface also defined the stereochemical basis for the selectivity of IDOL for UBE2Ds over other E2 ligases. Structure-based mutations that inhibit IDOL dimerization or IDOL-UBE2D interaction block IDOL-dependent LDLR ubiquitination and degradation. Furthermore, expression of a dominant-negative UBE2D enzyme inhibits the ability of IDOL to degrade the LDLR in cells. These results identify the IDOL-UBE2D complex as an important determinant of LDLR activity, and provide insight into molecular mechanisms underlying the regulation of cholesterol uptake.


    Organizational Affiliation

    Howard Hughes Medical Institute, University of California at Los Angeles School of Medicine, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
E3 UBIQUITIN-PROTEIN LIGASE MYLIP ACEG79Homo sapiensMutation(s): 0 
Gene Names: MYLIPBZF1IDOLBM-023PP5242
EC: 6.3.2 (PDB Primary Data), 2.3.2.27 (UniProt)
Find proteins for Q8WY64 (Homo sapiens)
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Go to UniProtKB:  Q8WY64
NIH Common Fund Data Resources
PHAROS:  Q8WY64
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
UBIQUITIN-CONJUGATING ENZYME E2 D1 BDFH149Homo sapiensMutation(s): 0 
Gene Names: UBE2D1SFTUBC5AUBCH5UBCH5A
EC: 6.3.2.19 (PDB Primary Data), 2.3.2.23 (UniProt), 2.3.2.24 (UniProt)
Find proteins for P51668 (Homo sapiens)
Explore P51668 
Go to UniProtKB:  P51668
NIH Common Fund Data Resources
PHAROS:  P51668
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.69α = 90
b = 137.87β = 106.39
c = 63.75γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance