Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 238.82 kDa 
• Atom Count: 15511 
• Modelled Residue Count: 1949 
• Deposited Residue Count: 2114 
• Unique protein chains: 3

1U6G

Crystal Structure of The Cand1-Cul1-Roc1 Complex

• PDB DOI: 10.2210/pdb1U6G/pdb

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


• Deposited: 2004-07-29 Released: 2004-12-14 
• Deposition Author(s): Goldenberg, S.J., Shumway, S.D., Cascio, T.C., Garbutt, K.C., Liu, J., Xiong, Y., Zheng, N.

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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 

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

• PubMed: 15537541 
• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cullin homolog 1	A	776	Homo sapiens	Mutation(s): 0  Gene Names: CUL1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13616 (Homo sapiens) Explore Q13616  Go to UniProtKB:  Q13616
PHAROS:  Q13616 GTEx:  ENSG00000055130

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
RING-box protein 1	B	108	Homo sapiens	Mutation(s): 0  Gene Names: RBX1, ROC1, RNF75 EC: 2.3.2.27 (UniProt), 2.3.2.32 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P62877 (Homo sapiens) Explore P62877  Go to UniProtKB:  P62877
PHAROS:  P62877 GTEx:  ENSG00000100387

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
TIP120 protein	C	1230	Homo sapiens	Mutation(s): 0  Gene Names: CAND1, KIAA0829, TIP120, TIP120A
UniProt & NIH Common Fund Data Resources
Find proteins for Q86VP6 (Homo sapiens) Explore Q86VP6  Go to UniProtKB:  Q86VP6
PHAROS:  Q86VP6 GTEx:  ENSG00000111530

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	D [auth B], E [auth B], F [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

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 = 108.466	α = 90
b = 151.327	β = 90
c = 215.892	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-07-29 
• Released Date: 2004-12-14 
Deposition Author(s): Goldenberg, S.J., Shumway, S.D., Cascio, T.C., Garbutt, K.C., Liu, J., Xiong, Y., Zheng, N.

Revision History  

• 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