2K79

Solution Structure of the binary complex between the SH3 and SH2 domain of interleukin-2 tyrosine kinase


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Proline isomerization preorganizes the Itk SH2 domain for binding to the Itk SH3 domain.

Severin, A.Joseph, R.E.Boyken, S.Fulton, D.B.Andreotti, A.H.

(2009) J Mol Biol 387: 726-743

  • DOI: 10.1016/j.jmb.2009.02.012
  • Primary Citation of Related Structures:  
    2K79, 2K7A

  • PubMed Abstract: 
  • We report here the NMR-derived structure of the binary complex formed by the interleukin-2 tyrosine kinase (Itk) Src homology 3 (SH3) and Src homology 2 (SH2) domains. The interaction is independent of both a phosphotyrosine motif and a proline-rich sequence, the classical targets of the SH2 and SH3 domains, respectively ...

    We report here the NMR-derived structure of the binary complex formed by the interleukin-2 tyrosine kinase (Itk) Src homology 3 (SH3) and Src homology 2 (SH2) domains. The interaction is independent of both a phosphotyrosine motif and a proline-rich sequence, the classical targets of the SH2 and SH3 domains, respectively. The Itk SH3/SH2 structure reveals the molecular details of this nonclassical interaction and provides a clear picture for how the previously described prolyl cis/trans isomerization present in the Itk SH2 domain mediates SH3 binding. The higher-affinity cis SH2 conformer is preorganized to form a hydrophobic interface with the SH3 domain. The structure also provides insight into how autophosphorylation in the Itk SH3 domain might increase the affinity of the intermolecular SH3/SH2 interaction. Finally, we can compare this Itk complex with other examples of SH3 and SH2 domains engaging their ligands in a nonclassical manner. These small binding domains exhibit a surprising level of diversity in their binding repertoires.


    Organizational Affiliation

    Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50010, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SH3 domain of Tyrosine-protein kinase ITK/TSKA63Mus musculusMutation(s): 0 
Gene Names: ItkEmtTlkTsk
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q03526 (Mus musculus)
Explore Q03526 
Go to UniProtKB:  Q03526
IMPC:  MGI:96621
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SH2 domain of Tyrosine-protein kinase ITK/TSKB110Mus musculusMutation(s): 0 
Gene Names: ItkEmtTlkTsk
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q03526 (Mus musculus)
Explore Q03526 
Go to UniProtKB:  Q03526
IMPC:  MGI:96621
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 2K79 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-01-01
    Changes: Database references, Derived calculations