1P22

Structure of a beta-TrCP1-Skp1-beta-catenin complex: destruction motif binding and lysine specificity on the SCFbeta-TrCP1 ubiquitin ligase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of a beta-TrCP1-Skp1-beta-Catenin complex: destruction motif binding and lysine specificity of the SCFbeta-TrCP1 ubiquitin ligase

Wu, G.Xu, G.Schulman, B.A.Jeffrey, P.D.Harper, J.W.Pavletich, N.P.

(2003) Mol.Cell 11: 1445-1456


  • PubMed Abstract: 
  • The SCF ubiquitin ligases catalyze protein ubiquitination in diverse cellular processes. SCFs bind substrates through the interchangeable F box protein subunit, with the >70 human F box proteins allowing the recognition of a wide range of substrates. ...

    The SCF ubiquitin ligases catalyze protein ubiquitination in diverse cellular processes. SCFs bind substrates through the interchangeable F box protein subunit, with the >70 human F box proteins allowing the recognition of a wide range of substrates. The F box protein beta-TrCP1 recognizes the doubly phosphorylated DpSGphiXpS destruction motif, present in beta-catenin and IkappaB, and directs the SCF(beta-TrCP1) to ubiquitinate these proteins at specific lysines. The 3.0 A structure of a beta-TrCP1-Skp1-beta-catenin complex reveals the basis of substrate recognition by the beta-TrCP1 WD40 domain. The structure, together with the previous SCF(Skp2) structure, leads to the model of SCF catalyzing ubiquitination by increasing the effective concentration of the substrate lysine at the E2 active site. The model's prediction that the lysine-destruction motif spacing is a determinant of ubiquitination efficiency is confirmed by measuring ubiquitination rates of mutant beta-catenin peptides, solidifying the model and also providing a mechanistic basis for lysine selection.


    Organizational Affiliation

    Cellular Biochemistry and Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
F-box/WD-repeat protein 1A
A
435Homo sapiensMutation(s): 0 
Gene Names: BTRC (BTRCP, FBW1A, FBXW1A)
Find proteins for Q9Y297 (Homo sapiens)
Go to Gene View: BTRC
Go to UniProtKB:  Q9Y297
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Skp1
B
145Homo sapiensMutation(s): 0 
Gene Names: SKP1 (EMC19, OCP2, SKP1A, TCEB1L)
Find proteins for P63208 (Homo sapiens)
Go to Gene View: SKP1
Go to UniProtKB:  P63208
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Beta-catenin
C
26Homo sapiensMutation(s): 0 
Gene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens)
Go to Gene View: CTNNB1
Go to UniProtKB:  P35222
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
C
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.230 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 82.600α = 90.00
b = 82.600β = 90.00
c = 111.500γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
DMphasing
REFMACrefinement
DMmodel building
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-08
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance