1U6G

Crystal Structure of The Cand1-Cul1-Roc1 Complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.247 

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


Literature

Structure of the Cand1-Cul1-Roc1 complex reveals regulatory mechanisms for the assembly of the multisubunit cullin-dependent ubiquitin ligases

Goldenberg, S.J., Cascio, T.C., Shumway, S.D., Garbutt, K.C., Liu, J., Xiong, Y., Zheng, N.

(2004) Cell 119: 517-528

  • DOI: 10.1016/j.cell.2004.10.019
  • Primary Citation of Related Structures:  
    1U6G

  • PubMed Abstract: 

    • The SCF ubiquitin ligase complex regulates diverse cellular functions by ubiquitinating numerous protein substrates. Cand1, a 120 kDa HEAT repeat protein, forms a tight complex with the Cul1-Roc1 SCF catalytic core, inhibiting the assembly of the multisubunit E3 complex ...

    The SCF ubiquitin ligase complex regulates diverse cellular functions by ubiquitinating numerous protein substrates. Cand1, a 120 kDa HEAT repeat protein, forms a tight complex with the Cul1-Roc1 SCF catalytic core, inhibiting the assembly of the multisubunit E3 complex. The crystal structure of the Cand1-Cul1-Roc1 complex shows that Cand1 adopts a highly sinuous superhelical structure, clamping around the elongated SCF scaffold protein Cul1. At one end, a Cand1 beta hairpin protrusion partially occupies the adaptor binding site on Cul1, inhibiting its interactions with the Skp1 adaptor and the substrate-recruiting F box protein subunits. At the other end, two Cand1 HEAT repeats pack against a conserved Cul1 surface cleft and bury a Cul1 lysine residue, whose modification by the ubiquitin-like protein, Nedd8, is able to block Cand1-Cul1 association. Together with biochemical evidence, these structural results elucidate the mechanisms by which Cand1 and Nedd8 regulate the assembly-disassembly cycles of SCF and other cullin-dependent E3 complexes.

    Organizational Affiliation: 

    Department of Pharmacology, Box 357280, University of Washington, Seattle, WA 98195, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cullin homolog 1A776Homo sapiensMutation(s): 0 
Gene Names: CUL1
Find proteins for Q13616 (Homo sapiens)
Explore Q13616 
Go to UniProtKB:  Q13616
NIH Common Fund Data Resources
PHAROS:  Q13616
GTEx:  ENSG00000055130
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RING-box protein 1B108Homo sapiensMutation(s): 0 
Gene Names: RBX1, ROC1, RNF75
EC: 2.3.2.27 (UniProt), 2.3.2.32 (UniProt)
Find proteins for P62877 (Homo sapiens)
Explore P62877 
Go to UniProtKB:  P62877
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PHAROS:  P62877
GTEx:  ENSG00000100387
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
TIP120 proteinC1230Homo sapiensMutation(s): 0 
Gene Names: CAND1, KIAA0829, TIP120, TIP120A
Find proteins for Q86VP6 (Homo sapiens)
Explore Q86VP6 
Go to UniProtKB:  Q86VP6
NIH Common Fund Data Resources
PHAROS:  Q86VP6
GTEx:  ENSG00000111530
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download Ideal Coordinates CCD File 
 D [auth B], E [auth B], F [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.247 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.466α = 90
b = 151.327β = 90
c = 215.892γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance