2KUQ image
Entry Detail
PDB ID:
2KUQ
Title:
Solution structure of the chimera of the PTB domain of SNT-2 and 19-residue peptide (aa 1571-1589) of HALK
Biological Source:
PDB Version:
Deposition Date:
2010-02-24
Release Date:
2010-05-26
Method Details:
Experimental Method:
Conformers Calculated:
20
Conformers Submitted:
20
Selection Criteria:
all calculated structures submitted
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Fibroblast growth factor receptor substrate 3,LINKER,ALK tyrosine kinase receptor
Chain IDs:A
Chain Length:153
Number of Molecules:1
Biological Source:Homo sapiens, synthetic construct
Ligand Molecules
Primary Citation
Structural basis for the recognition of nucleophosmin-anaplastic lymphoma kinase oncoprotein by the phosphotyrosine binding domain of Suc1-associated neurotrophic factor-induced tyrosine-phosphorylated target-2
J.Struct.Funct.Genom. 11 125 141 (2010)
PMID: 20454865 DOI: 10.1007/s10969-010-9091-x

Abstact

The nucleophosmin-anaplastic lymphoma kinase (NPM-ALK) fusion oncoprotein, formed by the t(2;5) chromosomal translocation in anaplastic large-cell lymphomas, has constitutive tyrosine kinase activity and interacts with a number of signaling molecules. One of the interacting partners of NPM-ALK is the adaptor protein, Suc1-associated neurotrophic factor-induced tyrosine-phosphorylated target (SNT), and mutations that deprive NPM-ALK of all three of the SNT-binding sites significantly reduced the transforming activity. In this study, the interactions of the three binding sites in NPM-ALK with the phosphotyrosine binding (PTB) domain of SNT-2 were analyzed. First, by isothermal titration calorimetry, we found that the phosphorylation-independent binding site in NPM-ALK interacts with the SNT-2 PTB domain more tightly than the phosphorylation-dependent binding sites. Second, the solution structure of the SNT-2 PTB domain in complex with the nonphosphorylated NPM-ALK peptide was determined by nuclear magnetic resonance spectroscopy. The NPM-ALK peptide interacts with the hydrophobic surface of the PTB domain and intermolecularly extends the PTB beta-sheet. This interaction mode is much broader and more extensive than those of the phosphorylation-dependent binding sites. Our results indicate that the higher binding activity of the phosphorylation-independent binding site is caused by additional hydrophobic interactions.

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Primary Citation of related structures