2ASS

Crystal structure of the Skp1-Skp2-Cks1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of the Cks1-Dependent Recognition of p27(Kip1) by the SCF(Skp2) Ubiquitin Ligase.

Hao, B.Zheng, N.Schulman, B.A.Wu, G.Miller, J.J.Pagano, M.Pavletich, N.P.

(2005) Mol.Cell 20: 9-19

  • DOI: 10.1016/j.molcel.2005.09.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The ubiquitin-mediated proteolysis of the Cdk2 inhibitor p27(Kip1) plays a central role in cell cycle progression, and enhanced degradation of p27(Kip1) is associated with many common cancers. Proteolysis of p27(Kip1) is triggered by Thr187 phosphory ...

    The ubiquitin-mediated proteolysis of the Cdk2 inhibitor p27(Kip1) plays a central role in cell cycle progression, and enhanced degradation of p27(Kip1) is associated with many common cancers. Proteolysis of p27(Kip1) is triggered by Thr187 phosphorylation, which leads to the binding of the SCF(Skp2) (Skp1-Cul1-Rbx1-Skp2) ubiquitin ligase complex. Unlike other known SCF substrates, p27(Kip1) ubiquitination also requires the accessory protein Cks1. The crystal structure of the Skp1-Skp2-Cks1 complex bound to a p27(Kip1) phosphopeptide shows that Cks1 binds to the leucine-rich repeat (LRR) domain and C-terminal tail of Skp2, whereas p27(Kip1) binds to both Cks1 and Skp2. The phosphorylated Thr187 side chain of p27(Kip1) is recognized by a Cks1 phosphate binding site, whereas the side chain of an invariant Glu185 inserts into the interface between Skp2 and Cks1, interacting with both. The structure and biochemical data support the proposed model that Cdk2-cyclin A contributes to the recruitment of p27(Kip1) to the SCF(Skp2)-Cks1 complex.


    Organizational Affiliation

    Howard Hughes Medical Institute, New York, New York 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
S-phase kinase-associated protein 1A
A
159Homo sapiensMutation(s): 1 
Gene Names: SKP1 (EMC19, OCP2, SKP1A, TCEB1L)
Find proteins for P63208 (Homo sapiens)
Go to Gene View: SKP1
Go to UniProtKB:  P63208
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
S-phase kinase-associated protein 2
B
336Homo sapiensMutation(s): 0 
Gene Names: SKP2 (FBXL1)
Find proteins for Q13309 (Homo sapiens)
Go to Gene View: SKP2
Go to UniProtKB:  Q13309
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cyclin-dependent kinases regulatory subunit 1
C
69Homo sapiensMutation(s): 0 
Gene Names: CKS1B (CKS1)
Find proteins for P61024 (Homo sapiens)
Go to Gene View: CKS1B
Go to UniProtKB:  P61024
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
B, C
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
BEN
Query on BEN

Download SDF File 
Download CCD File 
B, C
BENZAMIDINE
C7 H8 N2
PXXJHWLDUBFPOL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.214 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 149.332α = 90.00
b = 149.332β = 90.00
c = 99.916γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-10-18
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance