1D4W

CRYSTAL STRUCTURE OF THE XLP PROTEIN SAP IN COMPLEX WITH SLAM PHOSPHOPEPTIDE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.153 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Crystal structures of the XLP protein SAP reveal a class of SH2 domains with extended, phosphotyrosine-independent sequence recognition.

Poy, F., Yaffe, M.B., Sayos, J., Saxena, K., Morra, M., Sumegi, J., Cantley, L.C., Terhorst, C., Eck, M.J.

(1999) Mol Cell 4: 555-561

  • DOI: 10.1016/s1097-2765(00)80206-3
  • Primary Citation of Related Structures:  
    1D1Z, 1D4W, 1D4T

  • PubMed Abstract: 

    • SAP, the product of the gene mutated in X-linked lymphoproliferative syndrome (XLP), consists of a single SH2 domain that has been shown to bind the cytoplasmic tail of the lymphocyte coreceptor SLAM. Here we describe structures that show that SAP binds phosphorylated and nonphosphorylated SLAM peptides in a similar mode, with the tyrosine or phosphotyrosine residue inserted into the phosphotyrosine-binding pocket ...

    SAP, the product of the gene mutated in X-linked lymphoproliferative syndrome (XLP), consists of a single SH2 domain that has been shown to bind the cytoplasmic tail of the lymphocyte coreceptor SLAM. Here we describe structures that show that SAP binds phosphorylated and nonphosphorylated SLAM peptides in a similar mode, with the tyrosine or phosphotyrosine residue inserted into the phosphotyrosine-binding pocket. We find that specific interactions with residues N-terminal to the tyrosine, in addition to more characteristic C-terminal interactions, stabilize the complexes. A phosphopeptide library screen and analysis of mutations identified in XLP patients confirm that these extended interactions are required for SAP function. Further, we show that SAP and the similar protein EAT-2 recognize the sequence motif TIpYXX(V/I).

    Related Citations: 
    • The X-linked lymphoproliferative disease gene product SAP regulates signals induced through the co-receptor SLAM
      Sayos, J., Wu, C., Morra, M., Wang, N., Terhorst, C.
      (1998) Nature 395: 462
    Organizational Affiliation: 

    Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
T CELL SIGNAL TRANSDUCTION MOLECULE SAPA, B104Homo sapiensMutation(s): 0 
Gene Names: SH2D1A, DSHP, SAP
UniProt & NIH Common Fund Data Resources
Find proteins for O60880 (Homo sapiens)
Explore O60880 
Go to UniProtKB:  O60880
PHAROS:  O60880
GTEx:  ENSG00000183918
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNALING LYMPHOCYTIC ACTIVATION MOLECULEC, D11N/AMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for Q13291 (Homo sapiens)
Explore Q13291 
Go to UniProtKB:  Q13291
PHAROS:  Q13291
GTEx:  ENSG00000117090
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR		C, DL-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.153 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.2α = 90
b = 49β = 94.2
c = 55.6γ = 90
Software Package:
Software NamePurpose
AMoREphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-10-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation