1KA7

SAP/SH2D1A bound to peptide n-Y-c


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

A "three-pronged" binding mechanism for the SAP/SH2D1A SH2 domain: structural basis and relevance to the XLP syndrome.

Hwang, P.M.Li, C.Morra, M.Lillywhite, J.Muhandiram, D.R.Gertler, F.Terhorst, C.Kay, L.E.Pawson, T.Forman-Kay, J.D.Li, S.C.

(2002) EMBO J 21: 314-323

  • DOI: 10.1093/emboj/21.3.314
  • Primary Citation of Related Structures:  
    1KA7, 1KA6

  • PubMed Abstract: 
  • The SH2 domain protein SAP/SH2D1A, encoded by the X-linked lymphoproliferative (XLP) syndrome gene, associates with the hematopoietic cell surface receptor SLAM in a phosphorylation-independent manner. By screening a repertoire of synthetic peptides, ...

    The SH2 domain protein SAP/SH2D1A, encoded by the X-linked lymphoproliferative (XLP) syndrome gene, associates with the hematopoietic cell surface receptor SLAM in a phosphorylation-independent manner. By screening a repertoire of synthetic peptides, the specificity of SAP/SH2D1A has been mapped and a consensus sequence motif for binding identified, T/S-x-x-x-x-V/I, where x represents any amino acid. Remarkably, this motif contains neither a Tyr nor a pTyr residue, a hallmark of conventional SH2 domain-ligand interactions. The structures of the protein, determined by NMR, in complex with two distinct peptides provide direct evidence in support of a "three-pronged" binding mechanism for the SAP/SH2D1A SH2 domain in contrast to the "two-pronged" binding for conventional SH2 domains. Differences in the structures of the two complexes suggest considerable flexibility in the SH2 domain, as further confirmed and characterized by hydrogen exchange studies. The structures also explain binding defects observed in disease-causing SAP/SH2D1A mutants and suggest that phosphorylation-independent interactions mediated by SAP/SH2D1A likely play an important role in the pathogenesis of XLP.


    Organizational Affiliation

    Department of Biochemistry, University of Toronto, Toronto, Ontario M5S 1A8, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SH2 DOMAIN PROTEIN 1AA128Homo sapiensMutation(s): 0 
Gene Names: SH2D1ADSHPSAP
Find proteins for O60880 (Homo sapiens)
Explore O60880 
Go to UniProtKB:  O60880
NIH Common Fund Data Resources
PHAROS  O60880
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
peptide n-Y-cB12N/AMutation(s): 1 
Find proteins for Q13291 (Homo sapiens)
Explore Q13291 
Go to UniProtKB:  Q13291
NIH Common Fund Data Resources
PHAROS  Q13291
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1KA7 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance