Biological Assembly 1  

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Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 106238.96 
• Atom Count: 7426 
• Residue Count: 912 
• Unique protein chains: 1

1B47

STRUCTURE OF THE N-TERMINAL DOMAIN OF CBL IN COMPLEX WITH ITS BINDING SITE IN ZAP-70

• DOI: 10.2210/pdb1B47/pdb

• Classification: SIGNAL TRANSDUCTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1999-01-06 Released: 1999-04-27 
• Deposition Author(s): Meng, W., Sawasdikosol, S., Burakoff, S.J., Eck, M.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.266 
• R-Value Work: 0.218 

Literature

Structure of the amino-terminal domain of Cbl complexed to its binding site on ZAP-70 kinase.

Meng, W., Sawasdikosol, S., Burakoff, S.J., Eck, M.J.

(1999) Nature 398: 84-90

• PubMed: 10078535 
• DOI: 10.1038/18050
• Primary Citation of Related Structures:  
  2CBL


• PubMed Abstract: 
  

Cbl is an adaptor protein that functions as a negative regulator of many signalling pathways that start from receptors at the cell surface. The evolutionarily conserved amino-terminal region of Cbl (Cbl-N) binds to phosphorylated tyrosine residues and has cell-transforming activity. Point mutations in Cbl that disrupt its recognition of phosphotyrosine also interfere with its negative regulatory function and, in the case of v-cbl, with its oncogenic potential. In T cells, Cbl-N binds to the tyrosine-phosphorylated inhibitory site of the protein tyrosine kinase ZAP-70. Here we describe the crystal structure of Cbl-N, both alone and in complex with a phosphopeptide that represents its binding site in ZAP-70. The structures show that Cbl-N is composed of three interacting domains: a four-helix bundle (4H), an EF-hand calcium-binding domain, and a divergent SH2 domain that was not recognizable from the amino-acid sequence of the protein. The calcium-bound EF hand wedges between the 4H and SH2 domains and roughly determines their relative orientation. In the ligand-occupied structure, the 4H domain packs against the SH2 domain and completes its phosphotyrosine-recognition pocket. Disruption of this binding to ZAP-70 as a result of structure-based mutations in the 4H, EF-hand and SH2 domains confirms that the three domains together form an integrated phosphoprotein-recognition module.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CBL	A, B, C	304	Homo sapiens	Mutation(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

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CA	A, B, C	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.266 
• R-Value Work: 0.218 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 159.960	α = 90.00
b = 105.480	β = 92.06
c = 84.920	γ = 90.00

Software Package:

Software Name	Purpose
MOSFLM	data reduction
HEAVY	phasing
PATSOL	model building
PATSOL	phasing
CNS	refinement
CCP4	data scaling
HEAVY	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-01-06 
• Released Date: 1999-04-27 
• Deposition Author(s): Meng, W., Sawasdikosol, S., Burakoff, S.J., Eck, M.J.

Revision History 

• Version 1.0: 1999-04-27
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance