NMR Structure of the Itk SH2 domain, Pro287cis, Energy minimized average structure

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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Structural characterization of a proline-driven conformational switch within the Itk SH2 domain

Mallis, R.J.Brazin, K.N.Fulton, D.B.Andreotti, A.H.

(2002) Nat Struct Biol 9: 900-905

  • DOI: https://doi.org/10.1038/nsb864
  • Primary Citation of Related Structures:  
    1LUI, 1LUK, 1LUM, 1LUN

  • PubMed Abstract: 

    Interleukin-2 tyrosine kinase (Itk) is a T cell-specific kinase required for a proper immune response following T cell receptor engagement. In addition to the kinase domain, Itk is composed of several noncatalytic regulatory domains, including a Src homology 2 (SH2) domain that contains a conformationally heterogeneous Pro residue. Cis-trans isomerization of a single prolyl imide bond within the SH2 domain mediates conformer-specific ligand recognition that may have functional implications in T cell signaling. To better understand the mechanism by which a proline switch regulates ligand binding, we have used NMR spectroscopy to determine two structures of Itk SH2 corresponding to the cis and trans imide bond-containing conformers. The structures indicate that the heterogeneous Pro residue acts as a hinge that modulates ligand recognition by controlling the relative orientation of protein-binding surfaces.

  • Organizational Affiliation

    Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tyrosine-protein kinase ITK/TSK110Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q03526 (Mus musculus)
Explore Q03526 
Go to UniProtKB:  Q03526
IMPC:  MGI:96621
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Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ03526
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-11-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations