3BUW

Crystal structure of c-Cbl-TKB domain complexed with its binding motif in Syk


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for a novel intrapeptidyl H-bond and reverse binding of c-Cbl-TKB domain substrates

Ng, C.Jackson, R.A.Buschdorf, J.P.Sun, Q.Guy, G.R.Sivaraman, J.

(2008) Embo J. 27: 804-816

  • DOI: 10.1038/emboj.2008.18
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The c-Cbl tyrosine kinase binding domain (Cbl-TKB), essentially an 'embedded' SH2 domain, has a critical role in targeting proteins for ubiquitination. To address how this domain can bind to disparate recognition mofits and to determine whether this ...

    The c-Cbl tyrosine kinase binding domain (Cbl-TKB), essentially an 'embedded' SH2 domain, has a critical role in targeting proteins for ubiquitination. To address how this domain can bind to disparate recognition mofits and to determine whether this results in variations in substrate-binding affinity, we compared crystal structures of the Cbl-TKB domain complexed with phosphorylated peptides of Sprouty2, Sprouty4, epidermal growth factor receptor, Syk, and c-Met receptors and validated the binding with point-mutational analyses using full-length proteins. An obligatory, intrapeptidyl H-bond between the phosphotyrosine and the conserved asparagine or adjacent arginine is essential for binding and orients the peptide into a positively charged pocket on c-Cbl. Surprisingly, c-Met bound to Cbl in the reverse direction, which is unprecedented for SH2 domain binding. The necessity of this intrapeptidyl H-bond was confirmed with isothermal titration calorimetry experiments that also showed Sprouty2 to have the highest binding affinity to c-Cbl; this may enable the selective sequestration of c-Cbl from other target proteins.


    Organizational Affiliation

    Department of Biological Sciences, National University of Singapore, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
13-meric peptide from Tyrosine-protein kinase SYK
A, C
13Homo sapiensMutation(s): 0 
Gene Names: SYK
EC: 2.7.10.2
Find proteins for P43405 (Homo sapiens)
Go to Gene View: SYK
Go to UniProtKB:  P43405
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase CBL
B, D
329Homo sapiensMutation(s): 0 
Gene Names: CBL (CBL2, RNF55)
EC: 2.3.2.27
Find proteins for P22681 (Homo sapiens)
Go to Gene View: CBL
Go to UniProtKB:  P22681
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
A, C
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 63.793α = 90.00
b = 104.809β = 89.83
c = 52.778γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALEPACKdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description